Display device, design method thereof and image debugging method

Abstract

The invention relates to a display device, a design method thereof and an image display method, and relates to the technical field of display. The display device comprises a display panel and a plurality of cylindrical lenses located on the light emitting side of the display panel. The display panel is provided with a display area and a peripheral area located outside the display area. The display panel comprises a plurality of sub-pixels located in a display area, and the sub-pixels are distributed in an array mode in the first direction and the second direction. A lens inclination angle is formed between the axial direction of each cylindrical lens and the second direction, the area, overlapped with any cylindrical lens, in the display panel comprises a plurality of viewpoint areas distributed in the first direction, and one viewpoint area comprises a plurality of sub-pixels; the design method comprises the following steps: determining a viewpoint resolution according to size information and a specified sight distance of a target display panel; determining the number of viewpoint areas as the number of viewpoints according to the viewpoint resolution; and determining at least one lens inclination angle according to the viewpoint number.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display device, a design method for the display device, and an image debugging method for the display device. Background Technology

[0002] In glasses-free 3D technology, the method of displaying 3D images using cylindrical lenses is widely used. This method guides the transmission of light through the refraction of the lens, allowing the user to view a 3D image. However, the 3D display effect of existing display devices still needs improvement.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] This disclosure provides a display device, a design method for the display device, and an image debugging method for the display device, which can improve the display effect.

[0005] According to one aspect of this disclosure, a design method for a display device is provided. The display device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel. The display panel has a display area and a peripheral area located outside the display area. The display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction. The axial direction of each cylindrical lens has a lens tilt angle with the second direction. The area in the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area includes a plurality of the sub-pixels.

[0006] The design method includes:

[0007] Determine the viewpoint resolution based on the size information of the target display panel and the specified viewing distance;

[0008] The number of viewpoint regions is determined based on the viewpoint resolution, and is used as the number of viewpoints.

[0009] At least one of the lens tilt angles is determined based on the number of viewpoints.

[0010] In one exemplary embodiment of this disclosure, the boundary viewpoint resolution is determined based on the size information of the target display panel and a specified viewing distance; including:

[0011] Determine the reference viewpoint resolution based on the size information of the target display panel and the specified viewing distance;

[0012] If the specified viewing distance is less than the critical viewing distance, the larger of the reference viewpoint resolution and the preset standard viewpoint resolution shall be used as the viewpoint resolution.

[0013] If the specified viewing distance is greater than the critical viewing distance, the standard viewpoint resolution is used as the viewpoint resolution.

[0014] In one exemplary embodiment of this disclosure, the size information includes the length of the display area in the first direction and the width in the second direction; the reference viewpoint resolution satisfies the following relationship:

[0015] Rhs = L / (2×S×tan(1 / 120));

[0016] Rvs = H / (2×S×tan(1 / 120));

[0017] Rhs is the component of the reference viewpoint resolution in the first direction, and Rvs is the component of the reference viewpoint resolution in the second direction; L is the length of the display area in the first direction, and H is the width of the display area in the second direction; S is the specified viewing distance.

[0018] In one exemplary embodiment of this disclosure, the number of viewpoints satisfies the following relationship:

[0019] N = (Rha × Rva) / (Rh × Rv);

[0020] N is the number of viewpoint areas; Rha is the component of the display panel resolution in the first direction, Rva is the component of the panel resolution in the second direction; Rh is the component of the viewpoint resolution in the first direction, and Rv is the component of the viewpoint resolution in the second direction.

[0021] In one exemplary embodiment of this disclosure, the number of viewpoints further satisfies the following relationship:

[0022] N = N1 × N2;

[0023] N1 = Rha / Rh;

[0024] N2 = Rva / Rv;

[0025] N1∶N2=Rha∶Rva;

[0026] N1 is the row reduction factor, and N2 is the column reduction factor.

[0027] In one exemplary embodiment of this disclosure, determining at least one lens tilt angle based on the number of viewpoints includes:

[0028] Based on the number of viewpoints, the range of tilt angles without moiré patterns is obtained through simulation, and the lens tilt angle is located within the range of tilt angles.

[0029] In one exemplary embodiment of this disclosure, at least one lens tilt angle is determined based on the number of viewpoints; further comprising:

[0030] Based on the number of viewpoints, a tilt angle range with no moiré patterns, crosstalk below a specified crosstalk value, and fewer colored dots is selected from the tilt angle range through simulation, and the lens tilt angle is located within the tilt angle range.

[0031] In one exemplary embodiment of this disclosure, the design method further includes:

[0032] The lens parameters of the cylindrical lens with crosstalk below a specified crosstalk value are determined by simulation. The lens parameters include radius of curvature, aperture, surface constant, and higher-order aspherical coefficient.

[0033] According to one aspect of this disclosure, a display device is provided, including a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area located outside the display area; the display panel includes a plurality of sub-pixels located in the display area, each of the sub-pixels being arrayed along a first direction and a second direction; the axial direction of each cylindrical lens has a lens tilt angle with the second direction, and the area in the display panel overlapping with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, each viewpoint area including a plurality of the sub-pixels;

[0034] The lens tilt angle is [12.25°, 12.35°] or [12.71°, 12.81°].

[0035] According to one aspect of this disclosure, a display device is provided, including a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area located outside the display area; the display panel includes a plurality of sub-pixels located in the display area, each of the sub-pixels being arrayed along a first direction and a second direction; the axial direction of each cylindrical lens has a lens tilt angle with the second direction, and the area in the display panel overlapping with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, each viewpoint area including a plurality of the sub-pixels;

[0036] The boundary of the cylindrical lens in the orthographic projection of the display panel is the viewpoint boundary of the sub-pixel of the viewpoint area that overlaps with it, and the distance between any sub-pixel and its viewpoint boundary in the first direction is the viewpoint distance of the sub-pixel.

[0037] In a viewpoint region, sub-pixels whose viewpoint distance is less than a first distance or greater than a second distance are edge sub-pixels, and sub-pixels whose viewpoint distance is not less than the first distance and not greater than the second distance are center sub-pixels; the first distance is less than the second distance;

[0038] The display device is configured such that, when displaying an image, at least a portion of the edge sub-pixels of at least one viewpoint area are turned off, and the center sub-pixel is turned on.

[0039] In one exemplary embodiment of this disclosure, the first distance and the second distance satisfy the following relationship:

[0040] D1=Dmax-((Dmax-Dmin) / n);

[0041] D2=Dmin+((Dmax-Dmin) / n);

[0042] D1 is the first distance, D2 is the second distance; Dmax is the viewpoint distance of the sub-pixel with the largest viewpoint distance in the viewpoint area, Dmin is the viewpoint distance of the sub-pixel with the smallest viewpoint distance in the viewpoint area, n≥3, and n is a positive integer.

[0043] According to one aspect of this disclosure, a display device is provided, including a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area located outside the display area; the display panel includes a plurality of sub-pixels located in the display area, each of the sub-pixels being arrayed along a first direction and a second direction; the axial direction of each cylindrical lens has a lens tilt angle with the second direction, and the area in the display panel overlapping with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, each viewpoint area including a plurality of the sub-pixels;

[0044] The boundary of the cylindrical lens in the orthographic projection of the display panel is the viewpoint boundary of the sub-pixel of the viewpoint area that overlaps with it, and the distance between any sub-pixel and its viewpoint boundary in the first direction is the viewpoint distance of the sub-pixel.

[0045] In a viewpoint region, sub-pixels whose viewpoint distance is less than a first distance or greater than a second distance are edge sub-pixels, and sub-pixels whose viewpoint distance is not less than the first distance and not greater than the second distance are center sub-pixels; the first distance is less than the second distance;

[0046] The display device is configured to: generate a target gray level for each of the sub-pixels based on the initial gray level of each sub-pixel and a preset conversion relationship, and control each sub-pixel to display an image at its target gray level; the brightness corresponding to the target gray level of at least some of the edge sub-pixels is less than the brightness corresponding to their initial gray level.

[0047] In one exemplary embodiment of this disclosure, the brightness of the target gray level of at least some of the central sub-pixels is greater than the brightness of their initial gray level.

[0048] In one exemplary embodiment of this disclosure, the sum of the brightness of two edge sub-pixels that are equidistant from two adjacent viewpoint regions is equal to a specified brightness.

[0049] According to one aspect of this disclosure, an image display method for a display device is provided. The display device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel. The display panel has a display area and a peripheral area located outside the display area. The display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction. The axial direction of each cylindrical lens has a lens tilt angle with the second direction. The area in the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area contains a plurality of the sub-pixels.

[0050] The image display method includes:

[0051] In debug mode:

[0052] Control each of the sub-pixels of the display device to display the test screen in grayscale test mode;

[0053] The angular spectrum of each viewpoint area of ​​the display device is detected to obtain angular spectral lines that reflect the relationship between the viewing angle and brightness of each viewpoint area. These lines are used as test angular spectral lines for each viewpoint area, and the angular spectral lines of two adjacent viewpoint areas intersect.

[0054] Using the intersection position of the test angle spectral lines of adjacent viewpoint areas as the adjustment reference, the test angle spectral lines are adjusted to obtain the target angle spectral lines. The target angle spectral lines below the adjustment reference converge relative to the test angle spectral lines.

[0055] Determine the reference grayscale of each sub-pixel in the test image based on the target angular spectral line;

[0056] Establish the conversion relationship between the test grayscale and the reference grayscale for each of the sub-pixels;

[0057] In work mode:

[0058] The target gray level of each sub-pixel is generated based on the initial gray level of each sub-pixel and the preset conversion relationship.

[0059] Control each of the sub-pixels to display the image at its target grayscale.

[0060] In one exemplary embodiment of this disclosure, from the same viewing angle, the brightness of the target angular spectral line above the adjustment reference is greater than the brightness of the test angular spectral line.

[0061] In one exemplary embodiment of this disclosure, the test angle spectral line is adjusted; further comprising:

[0062] Reduce the test angular spectral line by a specified amount to obtain the reference angular spectral line;

[0063] Using the intersection position of the reference angular spectral lines of adjacent viewpoint areas as the adjustment reference, the reference angular spectral lines below the adjustment reference are converged by a specified convergence amplitude;

[0064] Using the intersection position of the reference angular spectral lines of adjacent viewpoint areas as the adjustment reference, the reference angular spectral lines above the adjustment reference are increased by a specified increase amount to obtain the target angular spectral line.

[0065] In one exemplary embodiment of this disclosure, under the same viewing angle, the sum of the brightness of the target angular spectral lines of two adjacent viewpoint areas is equal to the sum of the brightness of the test angular spectral lines of the two adjacent viewpoint areas under the same viewing angle.

[0066] In one exemplary embodiment of this disclosure, determining the reference grayscale of each sub-pixel in the test image based on the target angular spectral line includes:

[0067] The brightness of the target angular spectral lines in each viewpoint region is converted into grayscale using a specified gamma curve and used as a reference grayscale.

[0068] According to one aspect of this disclosure, an electronic device is provided, including the display device described in any one of the foregoing claims.

[0069] The design method disclosed herein and the resulting display device provide a general process for determining the lens tilt angle of a cylindrical lens. The number of viewpoint areas can be determined based on the viewpoint resolution, and then the lens tilt angle of the cylindrical lens can be determined based on the number of viewpoints. Compared with methods such as using empirical data, this reduces the risk of abnormal display effects and is conducive to obtaining better display effects.

[0070] The display device disclosed herein divides the sub-pixels within the viewpoint area by the distance (viewpoint distance) between the sub-pixels and the cylindrical lens boundary, and shuts down at least some edge sub-pixels, thereby reducing crosstalk between adjacent viewpoint areas while ensuring normal display, thus improving the display effect.

[0071] The image display method and another display device disclosed herein allow each sub-pixel to be converted to a target grayscale after obtaining an initial grayscale, and the image is displayed at the target grayscale. The brightness of the target grayscale of at least some edge sub-pixels is less than the brightness of the initial grayscale, thereby reducing crosstalk between adjacent viewpoint areas while ensuring normal display and thus improving the display effect.

[0072] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0073] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0074] Figure 1 This is a schematic diagram of one embodiment of the display device disclosed herein.

[0075] Figure 2 This is a partial enlarged view of one embodiment of the display device disclosed herein.

[0076] Figure 3 This is a spectral diagram of one embodiment of the display device of this disclosure.

[0077] Figure 4 This is a angular spectrum diagram of an existing display device.

[0078] Figure 5 This is a schematic diagram of step S231 in the image display method of the display device of this disclosure.

[0079] Figure 6 This is a schematic diagram of step S232 in the image display method of the display device of this disclosure.

[0080] Figure 7 This is a schematic diagram of step S233 in the image display method of the display device of this disclosure. Detailed Implementation

[0081] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0082] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0083] In this article, the first direction X and the second direction Y are two intersecting directions, for example, they are perpendicular, but are not limited to horizontal and vertical directions. Furthermore, the actual orientation of the first direction X and the second direction Y may change as the position of the display panel changes.

[0084] This disclosure provides a display device for implementing 3D display, such as... Figure 1 and Figure 2 As shown, the display device may include a display panel 10 and a plurality of cylindrical lenses 20, wherein each of the cylindrical lenses 20 is arrayed on the light-emitting side of the display panel 10, wherein:

[0085] The display panel 10 has a display area and a peripheral area outside the display area. The display area can emit light to display an image, and the peripheral area can be provided with circuitry for controlling the image. The display panel 10 can also include multiple sub-pixels P located in the display area, and each sub-pixel P is arrayed along a first direction X and a second direction Y. Each sub-pixel P can emit monochromatic light, and each sub-pixel P can include at least three sub-pixels P with different emitted colors. Each sub-pixel P can be divided into multiple pixels, and each pixel includes at least three adjacent sub-pixels P with different emitted colors. The outline of the sub-pixel P can be rectangular or other polygonal.

[0086] The display device may also include a control circuit that can be connected to the display panel 10. When displaying an image, the control circuit can output display information to the display panel 10. The display panel 10 can generate a driving signal that can control each sub-pixel P to emit light at a specified gray level according to the display information. The gray levels of different sub-pixels P may be different, depending on the display information.

[0087] In some embodiments of this disclosure, the display panel 10 may be a liquid crystal display panel, which may include an array substrate, an opposing substrate, and a liquid crystal layer disposed between the array substrate and the opposing substrate.

[0088] The liquid crystal display panel also includes pixel electrodes and common electrodes. The pixel electrodes can be disposed on the array substrate, and the common electrodes can be disposed on the array substrate or the opposing substrate, and each sub-pixel P includes one pixel electrode. By controlling the voltage between the pixel electrodes and the common electrodes, the degree of deflection of the liquid crystal molecules in the liquid crystal layer can be controlled, thereby controlling the light transmittance of each sub-pixel P and realizing the adjustment of the grayscale of each sub-pixel P.

[0089] The liquid crystal display panel may also include a backlight module, which may be disposed on the side of the array substrate away from the opposing substrate, and the backlight module may emit light toward the array substrate.

[0090] In some embodiments, the opposing substrate may include a color filter layer, which may include multiple light-filtering portions and light-absorbing portions. The light-absorbing portions have pixel openings, and each light-filtering portion is correspondingly disposed in each of the pixel openings. A sub-pixel P may include a light-filtering portion. Through the filtering effect of the light-filtering portion, a sub-pixel P emits monochromatic light, and different sub-pixels P may emit different colors. For example, among the sub-pixels P, there may be sub-pixels emitting red light, green light, and blue light. The shape of the sub-pixel P is the shape of the pixel opening, and the size of the sub-pixel P is the size of the pixel opening.

[0091] Of course, in other embodiments of this disclosure, the display panel 10 also has an array of light-emitting devices that emit light directly to display images. The light-emitting devices can be OLEDs (organic light-emitting diodes) made of organic light-emitting materials; they can also be LEDs (light-emitting diodes) made of inorganic light-emitting materials, such as Micro LEDs (micron-sized light-emitting diodes) and Mini LEDs (sub-millimeter-sized light-emitting diodes); they can also be QLEDs (quantum dot diodes), etc. The specific structure of the light-emitting devices is not specifically limited here.

[0092] like Figure 1 and Figure 2As shown, each cylindrical lens 20 can be distributed along the first direction X, and each cylindrical lens 20 overlaps with multiple sub-pixels P, such that each cylindrical lens 20 has multiple pixels within the orthographic projection range of the display panel 10, and correspondingly, multiple sub-pixels P exist. The axial length of the cylindrical lens 20 is greater than its radial width, and the cylindrical lens 20 can be a spherical cylindrical lens or an aspherical cylindrical lens. Through the refraction of light emitted by the sub-pixels P by the cylindrical lenses 20, the light emitted by each overlapping sub-pixel P can be projected to multiple viewpoints. When the user is at the viewpoint position, they can see the image formed by the light emitted by the corresponding sub-pixel P. A 3D effect can be obtained by superimposing multiple viewpoints. The 3D image can be composed of multiple image sub-pixels, and the range of one image sub-pixel is greater than the range of one sub-pixel. For example, the length of one image sub-pixel in the first direction X can be 6, 9, or 12 sub-pixels, and the width of one image sub-pixel in the second direction Y can be 6, 9, or 12 sub-pixels.

[0093] The axis of the cylindrical lens 20 can be the same as the second direction Y, that is, the cylindrical lens 20 extends along the second direction Y. At the same time, since the refraction of the cylindrical lens 20 will amplify the distance between sub-pixels P, thus forming moiré patterns, the axis of the cylindrical lens 20 can also be tilted at a certain angle to the second direction Y, which can be called the lens tilt angle θ, to reduce moiré patterns and improve the display effect. The lens tilt angle θ is greater than 0° and less than 90°.

[0094] For a display device with the above-mentioned lens tilt angle θ, the area in the display panel 10 that overlaps with any cylindrical lens 20 may include multiple viewpoint areas EA distributed along the first direction X. A viewpoint area EA may include multiple sub-pixels P, and the sub-pixels P of the same viewpoint area EA may be distributed along the axial direction of the cylindrical lens 20 that overlaps with it.

[0095] In some implementations, a sub-pixel P of a viewpoint region EA may include a plurality of pixel units distributed along the axial direction of the cylindrical lens 20. A pixel unit may include at least four sub-pixels P with different emission colors, and at least two adjacent sub-pixels P have the same emission color. For example, a pixel unit may include a green-emitting sub-pixel, two adjacent red-emitting sub-pixels, and a blue-emitting sub-pixel.

[0096] It should be noted that the above-mentioned light-emitting units and pixels are based on the division of different regions. The light-emitting unit is the division of sub-pixels P within the viewpoint area EA, while the pixel is the division of sub-pixels P within the entire display area. Sub-pixels P of the same pixel may belong to different pixel units, and sub-pixels P of the same pixel unit may also belong to different pixels.

[0097] For the aforementioned display device with a lens tilt angle θ, in order to determine the lens tilt angle θ, this disclosure provides a design method for the display device, which can determine the lens tilt angle θ. This design method may include steps S110-S130, wherein:

[0098] Step S110: Determine the viewpoint resolution based on the size information of the target display panel and the specified viewing distance.

[0099] Step S120: Determine the number of viewpoint areas based on the viewpoint resolution, which will be used as the number of viewpoints.

[0100] Step S130: Determine at least one lens tilt angle based on the number of viewpoints.

[0101] The design method of this disclosure provides a general process for determining the lens tilt angle θ of the cylindrical lens 20. The number of viewpoint areas EA can be determined according to the viewpoint resolution, and then the lens tilt angle θ of the cylindrical lens 20 can be determined according to the number of viewpoints. Compared with using empirical data and other methods, this reduces the risk of abnormal display effects and is conducive to obtaining better display effects.

[0102] The above design method will be explained in detail below:

[0103] In step S110, the size information of the target display panel 10 can be used to reflect the size of the display area. The display area can be rectangular, and the size information can include the length of the display area in the first direction X and the width in the second direction Y. The length and width can be expressed in units of length such as mm and cm, or in the number of sub-pixels P in the first direction X and the second direction Y. Taking a 110-inch display panel 10 as an example, its display area is rectangular, with a length of 2435.328 sub-pixels P and a width of 1369.872 sub-pixels P. Correspondingly, the resolution of the sub-pixels P of the display panel 10, i.e., the panel resolution, is 2435.328 × 1369.872.

[0104] The specified viewing distance is a preset viewing distance, which can be 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, 6m, 6.5m, 7m, etc., without any special restrictions.

[0105] Viewpoint resolution is the maximum resolution that the human eye can distinguish when the size of the display area and the viewing distance are fixed. In some embodiments of this disclosure, the viewpoint resolution can be determined in the following manner, i.e., step S110 may include steps S1110 and S1120, wherein:

[0106] Step S1110: Determine the reference viewpoint resolution based on the size information of the target display panel 10 and the specified viewing distance.

[0107] For example, the reference viewpoint resolution satisfies the following relationship:

[0108] Rhs = L / (2×S×tan(1 / 120));

[0109] Rvs = H / (2×S×tan(1 / 120));

[0110] Rhs is the component of the reference viewpoint resolution in the first direction X, and Rvs is the component of the reference viewpoint resolution in the second direction Y; L is the length of the display area in the first direction X, and H is the width of the display area in the second direction Y; S is the specified viewing distance.

[0111] Step S1120: Compare the reference viewpoint resolution with the preset standard viewpoint resolution. If the specified viewing distance is less than the critical viewing distance, the larger of the reference viewpoint resolution and the preset standard viewpoint resolution is used as the viewpoint resolution. If the specified viewing distance is greater than the critical viewing distance, the standard viewpoint resolution is used as the viewpoint resolution.

[0112] The standard viewpoint resolution can be obtained by performing image detection on a display panel 10 of the same specifications as the target display panel 10 using a detection device, or it can be determined by empirical data or other methods such as visual observation, as the maximum resolution that the human eye can distinguish at a specified viewing distance.

[0113] In some implementations, when the specified viewing distance is ≤3m and the resolution is >3840×2160, the human eye can distinguish that the image sharpness increases with the increase of resolution; when the viewing distance is ≥3m and the resolution is >3840×2160, the human eye can hardly distinguish that the image sharpness changes with the change of resolution. Therefore, 3840×2160 can be used as the standard viewpoint resolution, 3840 is the component of the standard viewpoint resolution in the first direction X, and 2160 is the component of the standard visual perception in the second direction Y.

[0114] The table below provides an example of the reference resolutions for a 110-inch display panel 10 at different specified viewing distances:

[0115] View distance μL / nm Minimum viewpoint spacing long Width Resolution - H Resolution-V 3000 0.87266462 2435.328 1369.872 2790.680342 1569.757693 3500 1.018108723 2435.328 1369.872 2392.011722 1845.506594 4000 1.163552326 2435.328 1369.872 2093.010257 1177.318269 4500 1.30899693 2435.328 1369.872 1860.453562 1046.505128 5000 1.444410033 2435.328 1369.872 1674.408205 941.8546155 5500 1.599885136 2435.328 1369.872 1522.189278 856.2314687 6000 1.74532924 2435.328 1369.872 1395.340171 784.8788463 0500 1.890773343 2435.328 1369.872 1288.006312 724.5035504 7000 2.0362174466 2435.328 13699.872 1196.005861 672.7532968

[0116] Viewing distance L is the specified viewing distance, length is the length of the display area in the first direction X, width is the width of the display area in the second direction Y, resolution-H is the component of the reference viewpoint resolution in the first direction X, and resolution-V is the component of the reference viewpoint resolution in the second direction Y. For a 110-inch display panel 10, at a viewing distance of 3m-7m, the standard viewpoint resolution of 3840×2160 is greater than the resolutions of each reference viewpoint; therefore, the viewpoint resolution is 3840×2160.

[0117] In step S120, the number of viewpoints determines the position where the user can view the 3D image; the more viewpoints, the more positions where the 3D image can be viewed. Due to the projection effect of the cylindrical lens 20, based on the viewpoint resolution determined above, the number of viewpoint regions EA satisfies the following relationship:

[0118] N = (Rha × Rva) / (RhΔRv);

[0119] N is the number of viewpoints; Rha is the component of the panel resolution of display panel 10 in the first direction X, and Rva is the component of the panel resolution in the second direction Y. Rh is the component of the viewpoint resolution in the first direction X, and Rv is the component of the viewpoint resolution in the second direction Y. For example, Rha = 15360, Rva = 8640, Rh = 5120, Rv = 2880; N = (15360 × 8640) / (5120 × 2880) = 9.

[0120] In other words, if the viewpoint resolution is less than the panel resolution, the light emitted by the display panel 10 at the panel resolution can form an image displayed at the viewpoint resolution.

[0121] Furthermore, the number of viewpoints also satisfies the following relationship:

[0122] N = N1 × N2;

[0123] N1 = Rha / Rh;

[0124] N2 = Rva / Rv;

[0125] N1:N2 = Rha:Rva;

[0126] N1 is the row reduction factor, and N2 is the column reduction factor.

[0127] The table below provides an example of the number of viewpoints for a 110-inch display panel 10 at different viewpoint resolutions:

[0128] inch 2D resolution - H 3D resolution - V Number of viewpoints Horizontal reduction ratio Vertical reduction of magnification Viewpoint resolution - length Viewpoint resolution - width Aspect Ratio 110 15360 8640 9 3 3 5120 2880 177778 110 15360 8640 12 4 3 3840 2880 1.3333 110 15360 8640 24 8 3 1920 2880 0.66667 110 15360 8640 24 4 6 3840 1440 266667 110 15360 8640 36 6 6 2560 1440 177778

[0129] 2D resolution -H and 3D resolution -V are the components of the panel resolution in the first direction X and the second direction Y, respectively. Viewpoint resolution -length is the component of the viewpoint resolution in the first direction X, and viewpoint resolution -V is the component of the viewpoint resolution in the second direction Y. It can be seen that different numbers of viewpoints can be determined for the same panel resolution and different viewpoint resolutions. Simultaneously, by comparing the ratio of row reduction ratio to column reduction ratio with a preset aspect ratio (e.g., 4:3 or 16:9), a ratio of reduction ratio to column reduction ratio that is equal to or close to the preset aspect ratio is used to ensure that both the number of viewpoints and the aspect ratio meet the requirements. Referring to the table above, to obtain an image with an aspect ratio of 4:3, the number of viewpoints can be 12, and the ratio of row reduction ratio to column reduction ratio can be 4:3.

[0130] In step S1 30, the lens tilt angle θ is the angle between the axis of the cylindrical lens 20 and the second direction Y. In some embodiments of this disclosure, the tilt angle range without moiré patterns can be obtained by simulation based on the number of viewpoints. An angle within the tilt angle range can be selected as the lens tilt angle θ, thereby determining the lens tilt angle θ of the cylindrical lens 20 when manufacturing the display device.

[0131] Furthermore, in addition to the absence of moiré patterns, the lens tilt angle θ also affects crosstalk. Therefore, step S130 further includes: selecting a tilt angle range within the tilt angle range based on the number of viewpoints through simulation, where there are no moiré patterns, crosstalk is lower than a specified crosstalk value, and the number of colored dots is less than a specified value, and the lens tilt angle θ is within the tilt angle range.

[0132] Simulation software can be used to further filter out tilt angle ranges with crosstalk below a specified value based on the lens tilt angle θ without moiré patterns. By detecting the arrangement of sub-pixels P of the display device, tilt angle ranges with fewer colored dots (or colored patterns) than a specified value can be further filtered out. The final tilt angle range is the value range of the lens tilt angle θ.

[0133] The table below provides an example of the moiré, crosstalk, and color dot patterns when the lens viewing angle is within different ranges:

[0134]

[0135] Among them, stereoscopic viewpoint is the viewing angle; moiré is the moiré pattern, and moiré < 0.25% can be considered as no moiré pattern; lens angle is the lens viewing angle; CT is the specified crosstalk value, which can be 6.4%; colored dots or colored patterns can be expressed in grades, namely light, relatively light, none / slight.

[0136] The range of tilt angles without moiré patterns is as follows:

[0137] 3.69°-4.01° (3.96±0.05°);

[0138] 4.90°-5.01° (4.96±0.05°)

[0139] 5.80°-6.12° (6.07±0.05°);

[0140] 6.52°-6.85° (6.8±0.05°)

[0141] 8.82°-9.17° (9.12±0.05°)

[0142] 9.75°–10.22° (10.09 ± 0.05°)

[0143] 12.20°-12.35° (12.30°±0.05°)

[0144] 12.71°-12.93° (12.76°±0.05°)

[0145] 19.18°-19.28° (19.23°±0.05°)

[0146] Note: Considering the limitations of the manufacturing process, the tilt angle without moiré patterns can be within the range of ().

[0147] After further screening, the tilt angle range that meets the requirements for no moiré patterns, crosstalk, and colored dots is [12.25°, 12.35°] and [12.71°, 12.81°], that is, 12.25°≤lens tilt angle θ≤12.35°, or 12.71°≤lens tilt angle θ≤12.81°.

[0148] Furthermore, in some embodiments of this disclosure, the design method of this disclosure may also include step S140, wherein:

[0149] In step S140, the lens parameters of the cylindrical lens 20 with crosstalk lower than a specified crosstalk value can be determined by simulation. The lens parameters include radius of curvature, aperture, surface constant, and higher order aspherical coefficient.

[0150] By comparing spherical cylindrical lenses and aspherical cylindrical lenses, the inventors discovered through experiments that the RMS (root mean square) of aspherical cylindrical lenses is smaller, while that of spherical cylindrical lenses is larger. For example, the RMS of aspherical cylindrical lenses is 6.787 μm, while that of spherical cylindrical lenses is 69.409 μm.

[0151] In some embodiments of this disclosure, the lens parameters of the aspherical cylindrical lens are shown in the table below:

[0152]

[0153] The radius of curvature is r, the surface constant is k, and the higher-order aspherical coefficients include a2, a4, a6, and a8; the refractive index of the material is the refractive index of the cylindrical lens 20.

[0154] Based on the above design method, this disclosure provides a display device. The specific structure of the display device can be referred to the above implementation method and will not be described in detail here. The cylindrical lens 20 is an aspherical lens with a lens tilt angle θ of [12.25°, 12.35°] and [12.71°, 12.81°]. The lens parameters can be the radius of curvature, aperture, surface constant, higher order aspherical coefficient and refractive index mentioned above.

[0155] like Figure 3 As shown in the simulation, Figure 3 The angular spectrum diagram of the display device with cylindrical lens 20 using the above lens tilt angle θ and lens parameters is obtained based on the above design method. The horizontal axis is the viewing angle and the vertical axis is the brightness. The angular spectrum diagram reflects the relationship between the brightness and the viewing angle of each viewpoint area EA. Figure 4 This is an angular spectrum diagram of a display device using a conventional spherical lens. In the angular spectrum diagram, an angular spectral line reflects the relationship between the brightness and viewing angle of a viewpoint region EA. The brightness is greatest when the viewing angle is at its center, and the brightness decreases as the viewing angle increases. The area below the intersection of two adjacent angular spectral lines is the region where crosstalk occurs. It can be seen that, compared with the prior art, the crosstalk range of the display device disclosed in this invention is smaller.

[0156] To address the crosstalk problem that occurs when displaying 3D images, the inventors propose that crosstalk can be reduced and image quality improved by controlling the emission of sub-pixels P. Based on this, such as... Figure 2 As shown, this disclosure also provides a display device, which may include a display panel 10 and a cylindrical lens 20. The axis of the cylindrical lens 20 may be the same as the second direction Y, or it may be at a lens tilt angle θ with the second direction Y. For the specific structure, please refer to the description of the display device above, which will not be repeated here.

[0157] To facilitate the description of the scheme, the following definition can be made:

[0158] like Figure 2As shown, the boundary of the orthographic projection of the cylindrical lens 20 onto the display panel 10 is defined as the viewpoint boundary of each sub-pixel P in the viewpoint area EA overlapping with the cylindrical lens 20. The viewpoint boundary can be the left or right boundary of the orthographic projection, but the viewpoint boundary of each sub-pixel P is the same boundary. Simultaneously, the distance between any sub-pixel P in the viewpoint area EA and its viewpoint boundary in the first direction X can be defined as the viewpoint distance of the sub-pixel P. Furthermore, the distance between the orthographic projection of the sub-pixel P onto the display panel 10 and its viewpoint boundary can be the distance between the geometric center of the orthographic projection of the sub-pixel P onto the display panel 10 and the viewpoint boundary. In other words, the position of the sub-pixel P can be reflected by the position of the geometric center of the orthographic projection of the display panel 10.

[0159] Within a viewpoint region EA, sub-pixels P whose viewpoint distance is less than a first distance or greater than a second distance can be defined as edge sub-pixels, and sub-pixels P whose viewpoint distance is not less than the first distance and not greater than the second distance can be defined as center sub-pixels. The first distance is less than the second distance, and both the first and second distances are less than the width of the viewpoint region EA in the first direction X. In other words, sub-pixels that are too far from or too close to the viewpoint boundary are edge sub-pixels. Through experiments and analysis, the inventors discovered that light emitted from the region corresponding to an edge sub-pixel within a viewpoint region EA is prone to crosstalk with light emitted from edge sub-pixels in adjacent viewpoint regions EA.

[0160] The following description, using a viewpoint region EA as an example, illustrates the first distance and the second distance through the sub-pixel P arrangement of one implementation method:

[0161] like Figure 2As shown, the area covered by the orthographic projection of a cylindrical lens 20 onto the display panel 10 can be defined as a lens area LA. Boundaries B1 and B2 are the boundaries of a lens area LA. Adjacent lens areas LA can reuse the same boundary. For example, boundary B1 is the right boundary of lens area LA1 and the left boundary of lens area LA2. The extending directions of boundaries B1 and B2 are the axial directions of the cylindrical lens 20. Each sub-pixel P is distributed along the first direction X and the second direction Y in an array. Row C shows the color of each column of sub-pixels P: R is red, G is green, and B is blue. The sub-pixels P in the same column have the same color as the corresponding sub-pixels in row C. A lens region LA may include viewpoint regions EA distributed along a first direction X. A viewpoint region EA may include multiple sub-pixels P distributed along a boundary B1 or a boundary B2. The sub-pixel P of the nth viewpoint region EA may be labeled as viewpoint region n, where n is a positive integer. For example, taking a lens region LA as an example, if n = 12, then the sub-pixel P of the first viewpoint region EA may be labeled as 1, the sub-pixel P of the second viewpoint region EA may be labeled as 2, and so on, with the sub-pixel P of the twelfth viewpoint region EA being labeled as 12. Boundary B1 may intersect at least a portion of the sub-pixels P of the first viewpoint region EA of the lens region LA1, and it may serve as the viewpoint boundary of the sub-pixels P of the first viewpoint region EA.

[0162] In the lens region LA1, the first distance and the second distance can be determined based on the distance between each sub-pixel P of the same viewpoint region EA and the boundary B1 in the first direction X, i.e., the viewpoint distance. For example, the first distance and the second distance satisfy the following relationship:

[0163] D1=Dmax-((Dmax-Dmin) / n);

[0164] D2=Dmin+((Dmax-Dmin) / n);

[0165] D1 is the first distance, D2 is the second distance; Dmax is the view distance of the sub-pixel P with the largest view distance in a view area EA, Dmin is the view distance of the sub-pixel P with the smallest view distance in the same view area EA, n≥3, and n is a positive integer.

[0166] like Figure 2As shown, the method for determining the center and edge sub-pixels described above can also be expressed visually. Specifically, the center and edge sub-pixels can be divided within the viewpoint region EA using straight lines as boundaries. For the first viewpoint region EA, two straight lines (L1 and L2) can be drawn through the centers of the sub-pixels P with the largest and smallest viewpoint distances, respectively. These two lines are parallel and extend along the axis of the cylindrical lens 20. These two lines are the boundaries of the position of the sub-pixel P in a viewpoint region EA. For the first viewpoint region EA, one of the two lines (L2) can coincide with the boundary B1. The distance H between the straight line L1 and the boundary B1 in the first direction X can be divided into multiple intervals, where n is a positive integer greater than or equal to 3. Sub-pixels P located in one or more intervals closest to the boundary B1 and one or more intervals farthest from the boundary are edge sub-pixels, and sub-pixels P in one or more intermediate intervals are center sub-pixels.

[0167] like Figure 2 As shown, taking the first viewpoint area EA of lens region LA1 as an example, the lens tilt angle θ is 12.3°, the viewpoint distance between each sub-pixel P and the boundary B1 of lens region LA1 is A, the outline of sub-pixel P is rectangular, the boundary B1 intersects the midpoint of the long side of the first sub-pixel P, the distance of any sub-pixel P in the first direction X is Ps, and the length in the second direction Y is Pp, where:

[0168] The first sub-pixel P is located in the first row, and its viewpoint distance satisfies:

[0169] A = 0.5 × Pp × tan(12.3°);

[0170] The second sub-pixel P is located in the second row, and its viewpoint distance satisfies:

[0171] A=1.5×Pp-3×Pp×tan(12.3°);

[0172] The third sub-pixel P is located in the third row, and its viewpoint distance satisfies:

[0173] A=(1.5-6×tan(12.3°))×Pp;

[0174] The 4th sub-pixel P is located in the 4th row, and its viewpoint distance satisfies:

[0175] A=(2.5-9×tan(12.3°))×Pp;

[0176] The 5th sub-pixel P is located in the 5th row, and its viewpoint distance satisfies:

[0177] A=(3.5-12×tan(12.3°))×Pp;

[0178] The 6th sub-pixel P is located in the 6th row, and its viewpoint distance satisfies:

[0179] A=(3.5-15×tan(12.3°))×Pp;

[0180] The viewpoint distances for other rows follow the same pattern and will not be listed here. Data analysis shows that the viewpoint distance A of each sub-pixel P in the first viewpoint area EA is approximately 0.5Ps.

[0181] It should be noted that the edge sub-pixels and center sub-pixels in this article are determined based on the distance between sub-pixel P and the boundary of the lens area LA, and not the outermost and middle sub-pixels P in the direction of the boundary extension.

[0182] Option 1

[0183] Based on the display device described above, its structure can be referenced from the implementation method of the display device described above, and its structure will not be repeated here. The display device can be configured such that, when displaying an image, at least some edge sub-pixels of at least one viewpoint area EA are turned off, and the center sub-pixels are turned on. Since the areas corresponding to the edge sub-pixels are prone to crosstalk, turning off the edge sub-pixels can improve the crosstalk problem, and the emission of the center sub-pixels can ensure normal display.

[0184] like Figure 2 As shown, for the first viewpoint region EA of lens region LA1, the distance H between the straight line L1 and the boundary B1 is the range of the first viewpoint region EA. The distance H can be divided into n equal parts, where n is a positive number and can be an integer or a decimal. For example, the distance H can be divided into 20 equal parts. If the sub-pixels P corresponding to the 1st and 20th parts are turned off, and the number of sub-pixels P in the first viewpoint region EA is 1 when all sub-pixels P in the first viewpoint region EA are turned on, then after turning off the sub-pixels P corresponding to the 1st and 20th parts, the number of sub-pixels P in the first viewpoint region EA is 0.9, which can improve the crosstalk problem caused by the superposition of light emission from some sub-pixels P in adjacent viewpoint regions EA.

[0185] The second option

[0186] Based on the display device described above, its structure can be referred to the implementation method of the display device described above, and its structure will not be repeated here. The display device can be configured to: generate the target gray level of each sub-pixel P according to the initial gray level of each sub-pixel P and the preset conversion relationship, and control each sub-pixel P to display the image with its target gray level; at least some edge sub-pixels have a brightness corresponding to the target gray level that is less than the brightness corresponding to their initial gray level.

[0187] After obtaining the initial grayscale, each sub-pixel P does not emit light directly based on the initial grayscale, but instead converts it to the target grayscale through a preset conversion relationship, and then displays the image with the target grayscale; at least some edge sub-pixels have a target grayscale corresponding to a brightness that is less than the initial grayscale corresponding to a brightness, which reduces crosstalk between adjacent viewpoint areas EA while ensuring normal display, thereby improving the display effect.

[0188] The aforementioned preset conversion relationship can be obtained from the initial grayscale and the angular spectrum obtained by testing the display device. The method for determining the conversion relationship will be explained in the image display method below, and will not be detailed here.

[0189] Furthermore, in some embodiments of this disclosure, in order to compensate for the impact of the decrease in brightness of edge sub-pixels on the overall brightness, the brightness of the target gray level of at least some center sub-pixels can be made greater than the brightness of their initial gray level, thereby increasing the brightness of center sub-pixels while the brightness of edge sub-pixels decreases.

[0190] For a viewpoint area EA of a display device, the position of sub-pixel P can be determined by the viewing angle and the viewpoint distance, and a viewing angle can correspond to a viewpoint distance. In some embodiments of this disclosure, the sum of the brightness of two edge sub-pixels with equal viewpoint distances from two adjacent viewpoint areas EA is equal to a specified brightness, such that the total brightness of adjacent viewpoint areas EA is the same under any viewing angle. Furthermore, if directly displayed based on the initial grayscale, the sum of the brightness of two edge sub-pixels with equal viewpoint distances from two adjacent viewpoint areas EA is also equal to the specified brightness. That is, for any viewing angle, the total brightness of two adjacent viewpoint areas EA is the same whether displayed using the target grayscale or the initial grayscale.

[0191] like Figures 5-7 As shown, this disclosure also provides an image display method, which can be used for the second solution of the above-described display device. The structure of the display device can refer to the structure of the display device described above, and will not be repeated here. The image display method includes: determining the conversion relationship in the debugging mode, and displaying the image in the working mode. Specifically:

[0192] In debug mode, steps S210-S250 may be included, wherein:

[0193] Step S210: Control each sub-pixel P of the display device to display the test screen for grayscale testing.

[0194] Step S220: Detect the angular spectrum of each viewpoint area EA of the display device to obtain angular spectral lines that reflect the relationship between the viewing angle and brightness of each viewpoint area EA, which are used as test angular spectral lines of each viewpoint area EA. The angular spectral lines of two adjacent viewpoint areas EA intersect.

[0195] Step S230: Using the intersection position of the test angle spectral lines of adjacent viewpoint areas EA as the adjustment reference F, adjust the test angle spectral lines to obtain the target angle spectral lines. The target angle spectral lines below the adjustment reference F converge relative to the test angle spectral lines.

[0196] Step S240: Determine the reference grayscale of each sub-pixel P in the test image based on the target angular spectral line.

[0197] Step S250: Establish the conversion relationship between test grayscale and reference grayscale for each sub-pixel P.

[0198] From the same viewpoint, adjust the brightness of the target angular spectral line above the reference F to be greater than the brightness of the test angular spectral line.

[0199] By adjusting the diagonal spectrum, the conversion relationship between the target gray level and the initial gray level is established, thereby adjusting the brightness of the image and reducing the brightness of edge sub-pixels, thus improving crosstalk.

[0200] The following is a detailed explanation of each step:

[0201] In step S210, the test grayscale is the grayscale used to display the test image. Each sub-pixel P displays the test grayscale, so the test image can be viewed. However, the size of the test grayscale of different sub-pixels P can be different.

[0202] In step S220, the angular spectral line is a curve that reflects the relationship between viewing angle and brightness. For any viewpoint region EA, since the number of edge sub-pixels is less than that of the center sub-pixels, and even if the gray levels of each sub-pixel P in a viewpoint region EA are the same, the brightness detected by the display device or seen by the user gradually decreases as the viewing angle increases due to the superposition of brightness.

[0203] Angular spectral lines reflect the visual brightness distribution, not the brightness directly output by sub-pixels P. An angular spectral line can be obtained for each viewpoint region (EA). The angular spectral lines of different viewpoint regions (EA) can have the same angular width and brightness range, and the angular spectral lines of adjacent viewpoint regions (EA) intersect. The angular spectral lines reflecting all viewpoint regions (EA) of the display device are called the angular spectrum diagram. The angular spectral lines derived from the test image are called test angular spectral lines, and the corresponding angular spectrum diagram is called the test image.

[0204] In step S230, since the test angle spectral lines of adjacent viewpoint areas EA intersect, the intersection position of the test angle spectral lines of adjacent viewpoint areas EA can be used as the adjustment reference F. The intersection position can be the intersection point, which is also the area within a certain range around the intersection point. This range can be predetermined. On one side of the intersection point, under the same viewing angle, crosstalk occurs between the two viewpoint areas EA. Therefore, the test angle spectral lines can be adjusted to obtain the target angle spectral lines. This adjustment includes making the target angle spectral lines below the adjustment reference F converge relative to the test angle spectral lines, making the angle spectral lines below the adjustment reference F steeper, so that the rate of change of brightness with the increase of the viewing angle is greater than that of the test angle spectral lines, reducing the overall brightness over a large viewing angle range, thereby reducing crosstalk.

[0205] In some embodiments of this disclosure, step S230 includes steps S231-S233, wherein:

[0206] Step S231: Reduce the test angle spectral line by a specified amount to obtain the reference angle spectral line.

[0207] like Figure 5 As shown, the spectral lines of the test angle can be reduced by a specified amount, that is, the brightness at each viewing angle is reduced by a specified amount.

[0208] Step S232: Using the intersection position of the reference angular spectral lines of adjacent viewpoint regions EA as the adjustment reference, the reference angular spectral lines below the adjustment reference are converged by specifying the convergence amplitude.

[0209] like Figure 6 As shown, only the reference curve below the adjustment reference F is adjusted to converge with a specified convergence amplitude, making the angular spectral line below the adjustment reference F steeper. This makes the rate of change of brightness as the viewing angle increases greater than that of the reference angular spectral line, thus reducing the overall brightness over a large viewing angle range.

[0210] Step S233: Using the intersection of the reference angular spectral lines of adjacent viewpoint areas EA as the adjustment reference, increase the reference angular spectral line above the adjustment reference by a specified increase amount to obtain the target angular spectral line.

[0211] like Figure 7 As shown, after the adjustment of step S232, the overall brightness below the adjustment reference F is reduced. In order to ensure that the overall brightness of the viewpoint area EA is not significantly reduced, the brightness of the reference angle spectral line above the adjustment reference F can be increased by a specified increase to compensate for the brightness decrease caused by step S243.

[0212] Furthermore, in some embodiments of this disclosure, under the same viewing angle, the sum of the brightness of the target angular spectral lines of two adjacent viewpoint areas EA can be equal to the sum of the brightness of the test angular spectral lines of the two adjacent viewpoint areas EA under the same viewing angle. That is to say, although the test angular spectral lines are adjusted in the above step S230, the total brightness of the test angular spectral lines and the total brightness of the target angular spectral lines are equal under the same viewing angle, so as to avoid the overall brightness reduction while adjusting the local brightness.

[0213] In step S240, since the values ​​of brightness and grayscale are in one-to-one correspondence, as long as the brightness is determined, a grayscale can be determined for each brightness. For example, the brightness contained in the target angle spectrum of each viewpoint area EA can be converted into grayscale using a specified gamma curve as a reference grayscale. The gamma curve can be a gamma 2.2 curve, or a gamma 2.8, gamma 1.1, etc., as long as the grayscale can be determined based on the brightness.

[0214] In step S250, multiple target gray levels corresponding one-to-one with the initial gray level can be obtained through step S240. The relationship between the initial gray level and the target gray level can be determined based on the difference between them, serving as the conversion relationship mentioned above. This ensures that as long as the display panel 10 obtains the initial gray level, the corresponding target gray level can be determined based on the conversion relationship. The conversion relationship between the initial gray level and the target gray level can be determined by data fitting. Therefore, steps S210-S240 can be repeated multiple times.

[0215] In test mode, the conversion relationship has been determined and can be stored in the display device. In working mode, the image can be displayed normally. At this time, the acquired initial grayscale can be converted into the target grayscale, and the sub-pixel P is controlled to display the image at the target grayscale, thereby reducing crosstalk. Specifically, the image display method may include steps S310 and S320, wherein:

[0216] Step S310: Generate the target gray level of each sub-pixel P based on the initial gray level of each sub-pixel P and the preset conversion relationship.

[0217] Step S320: Control each sub-pixel P to display the image at its target grayscale.

[0218] It should be noted that although the steps of the design method and image display method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that these steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0219] This disclosure also provides an electronic device that may include the display device of any of the above embodiments. The specific structure and beneficial effects of the display device can be referred to the embodiments of the display device described above, and will not be detailed here. The electronic device may be a television, electronic billboard, or other device with 3D display function, and will not be listed here.

[0220] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A design method for a display device, characterized in that, The display device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area located outside the display area; the display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction; the axial direction of the cylindrical lens has a lens tilt angle with the second direction, and the area of ​​the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area includes a plurality of the sub-pixels; The design method includes: Determine the viewpoint resolution based on the size information of the target display panel and the specified viewing distance; The number of viewpoint regions is determined based on the viewpoint resolution, and is used as the number of viewpoints. At least one of the lens tilt angles is determined based on the number of viewpoints.

2. The design method according to claim 1, characterized in that, Determine the boundary viewpoint resolution based on the target display panel's size information and the specified viewing distance; including: Determine the reference viewpoint resolution based on the size information of the target display panel and the specified viewing distance; If the specified viewing distance is less than the critical viewing distance, the larger of the reference viewpoint resolution and the preset standard viewpoint resolution shall be used as the viewpoint resolution. If the specified viewing distance is greater than the critical viewing distance, the standard viewpoint resolution is used as the viewpoint resolution.

3. The design method according to claim 2, characterized in that, The size information includes the length of the display area in the first direction and the width in the second direction; the reference viewpoint resolution satisfies the following relationship: Rhs = L / (2×S×tan(1 / 120)); Rvs = H / (2×S×tan(1 / 120)); Rhs is the component of the reference viewpoint resolution in the first direction, and Rvs is the component of the reference viewpoint resolution in the second direction; L is the length of the display area in the first direction, and H is the width of the display area in the second direction; S is the specified viewing distance.

4. The design method according to claim 1, characterized in that, The number of viewpoints satisfies the following relationship: N = (Rha × Rva) / (Rh × Rv); N is the number of viewpoint areas; Rha is the component of the display panel resolution in the first direction, Rva is the component of the panel resolution in the second direction; Rh is the component of the viewpoint resolution in the first direction, and Rv is the component of the viewpoint resolution in the second direction.

5. The design method according to claim 4, characterized in that, The number of viewpoints also satisfies the following relationship: N = N1 × N2; N1 = Rha / Rh; N2 = Rva / Rv; N1∶N2=Rha∶Rva; N1 is the row reduction factor, and N2 is the column reduction factor.

6. The design method according to claim 1, characterized in that, Determining at least one lens tilt angle based on the number of viewpoints; including: Based on the number of viewpoints, the range of tilt angles without moiré patterns is obtained through simulation, and the lens tilt angle is located within the range of tilt angles.

7. The design method according to claim 6, characterized in that, Determining at least one of the lens tilt angles based on the number of viewpoints; further comprising: Based on the number of viewpoints, a tilt angle range with no moiré patterns, crosstalk below a specified crosstalk value, and fewer colored dots is selected from the tilt angle range through simulation, and the lens tilt angle is located within the tilt angle range.

8. The design method according to any one of claims 1-7, characterized in that, The design method further includes: The lens parameters of the cylindrical lens with crosstalk below a specified crosstalk value are determined by simulation. The lens parameters include radius of curvature, aperture, surface constant, and higher-order aspherical coefficient.

9. A display device, characterized in that, The device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area outside the display area; the display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction; the axial direction of the cylindrical lens has a lens tilt angle with the second direction, and the area of ​​the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area includes a plurality of the sub-pixels; The lens tilt angle is [12.25°, 12.35°] or [12.71°, 12.81°].

10. A display device, characterized in that, The device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area outside the display area; the display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction; the axial direction of the cylindrical lens has a lens tilt angle with the second direction, and the area of ​​the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area includes a plurality of the sub-pixels; The boundary of the cylindrical lens in the orthographic projection of the display panel is the viewpoint boundary of the sub-pixel of the viewpoint area that overlaps with it, and the distance between any sub-pixel and its viewpoint boundary in the first direction is the viewpoint distance of the sub-pixel. In a viewpoint region, sub-pixels whose viewpoint distance is less than a first distance or greater than a second distance are edge sub-pixels, and sub-pixels whose viewpoint distance is not less than the first distance and not greater than the second distance are center sub-pixels; the first distance is less than the second distance; The display device is configured such that, when displaying an image, at least a portion of the edge sub-pixels of at least one viewpoint area are turned off, and the center sub-pixel is turned on.

11. The display device according to claim 10, characterized in that, The first distance and the second distance satisfy the following relationship: D1=Dmax-((Dmax-Dmin) / n); D2=Dmin+((Dmax-Dmin) / n); D1 is the first distance, D2 is the second distance; Dmax is the viewpoint distance of the sub-pixel with the largest viewpoint distance in the viewpoint area, Dmin is the viewpoint distance of the sub-pixel with the smallest viewpoint distance in the viewpoint area, n≥3, and n is a positive integer.

12. A display device, characterized in that, The device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area outside the display area; the display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction; the axial direction of the cylindrical lens has a lens tilt angle with the second direction, and the area of ​​the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and each viewpoint area includes a plurality of the sub-pixels; The boundary of the cylindrical lens in the orthographic projection of the display panel is the viewpoint boundary of the sub-pixel of the viewpoint area that overlaps with it, and the distance between any sub-pixel and its viewpoint boundary in the first direction is the viewpoint distance of the sub-pixel. In a viewpoint region, sub-pixels whose viewpoint distance is less than a first distance or greater than a second distance are edge sub-pixels, and sub-pixels whose viewpoint distance is not less than the first distance and not greater than the second distance are center sub-pixels; the first distance is less than the second distance; The display device is configured to: generate a target gray level for each of the sub-pixels based on the initial gray level of each sub-pixel and a preset conversion relationship, and control each sub-pixel to display an image at its target gray level; the brightness corresponding to the target gray level of at least some of the edge sub-pixels is less than the brightness corresponding to their initial gray level.

13. The display device according to claim 12, characterized in that, At least some of the central sub-pixels have a target gray level with a brightness greater than their initial gray level.

14. The display device according to claim 12, characterized in that, The sum of the brightness of two edge sub-pixels that are equidistant from two adjacent viewpoint regions is equal to the specified brightness.

15. An image display method of a display device, characterized by, The display device includes a display panel and a plurality of cylindrical lenses located on the light-emitting side of the display panel; the display panel has a display area and a peripheral area located outside the display area; the display panel includes a plurality of sub-pixels located in the display area, and each of the sub-pixels is arrayed along a first direction and a second direction; the axial direction of the cylindrical lens has a lens tilt angle with the second direction, and the area of ​​the display panel that overlaps with any of the cylindrical lenses includes a plurality of viewpoint areas distributed along the first direction, and a plurality of the sub-pixels in each viewpoint area; The image display method includes: In debug mode: Control each of the sub-pixels of the display device to display the test screen in grayscale test mode; The angular spectrum of each viewpoint area of ​​the display device is detected to obtain angular spectral lines that reflect the relationship between the viewing angle and brightness of each viewpoint area. These lines are used as test angular spectral lines for each viewpoint area, and the angular spectral lines of two adjacent viewpoint areas intersect. Using the intersection position of the test angle spectral lines of adjacent viewpoint areas as the adjustment reference, the test angle spectral lines are adjusted to obtain the target angle spectral lines. The target angle spectral lines below the adjustment reference converge relative to the test angle spectral lines. Determine the reference grayscale of each sub-pixel in the test image based on the target angular spectral line; Establish the conversion relationship between the test grayscale and the reference grayscale for each of the sub-pixels; In work mode: The target gray level of each sub-pixel is generated based on the initial gray level of each sub-pixel and the preset conversion relationship. Control each of the sub-pixels to display the image at its target grayscale.

16. The image display method according to claim 15, wherein From the same viewpoint, the brightness of the target angular spectral line above the adjustment reference is greater than the brightness of the test angular spectral line.

17. The image display method according to claim 16, wherein Adjusting the test angle spectral lines; also includes: Reduce the test angular spectral line by a specified amount to obtain the reference angular spectral line; Using the intersection position of the reference angular spectral lines of adjacent viewpoint areas as the adjustment reference, the reference angular spectral lines below the adjustment reference are converged by a specified convergence amplitude; Using the intersection position of the reference angular spectral lines of adjacent viewpoint areas as the adjustment reference, the reference angular spectral lines above the adjustment reference are increased by a specified increase amount to obtain the target angular spectral line.

18. The image display method according to claim 17, wherein From the same viewpoint, the sum of the brightness of the target angular spectral lines of two adjacent viewpoint areas is equal to the sum of the brightness of the test angular spectral lines of the two adjacent viewpoint areas from the same viewpoint.

19. The image display method according to claim 17, wherein Determining the reference grayscale of each sub-pixel in the test image based on the target angular spectral line; including: The brightness of the target angular spectral lines in each viewpoint region is converted into grayscale using a specified gamma curve and used as a reference grayscale.

20. An electronic device, comprising: Includes the display device according to any one of claims 9-14.

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