Display method and display device

Abstract

A display method is provided. The display method includes: providing a display panel including a plurality of sub-pixels, each of the plurality of sub-pixels including a first region, n1 second regions and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1≥1, and n2≥1; for displaying a first image frame, controlling the light emission of each sub-pixel to be limited in the first region, m1 of the n1 second regions and m2 of the n2 third regions; and for displaying a second image frame, controlling the light emission of each sub-pixel to be limited in the first region, m1' of the n1 second regions and m2' of the n2 third regions.

Description

TECHNICAL FIELD

[0001] The present application relates to display technology, and in particular, to a display method and a display device. BACKGROUND

[0002] Display devices such as liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs) have been widely used. LCD and OLED display devices use thin-film transistors (TFTs) to control pixels in a display panel. In recent years, miniaturized electro-optical devices including micro light-emitting diodes (micro-LEDs) have been proposed and developed. Micro-LED-based display panels have the advantages of high brightness, high contrast, fast response, and low power consumption. Micro-LED-based display technology has found wide application in the display field, including smart phones and smart watches. SUMMARY

[0003] In an aspect, the present disclosure provides a display method, comprising: providing a display panel comprising a plurality of sub-pixels, each of the plurality of sub-pixels comprising a first region, n1 second regions, and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1≥1, and n2≥1; for displaying a first image frame, controlling the light emission of each sub-pixel to be confined in the first region, m1 of the n1 second regions, and m2 of the n2 third regions, 0≤m1≤n1 and 0≤m2≤n2; and for displaying a second image frame, controlling the light emission of each sub-pixel to be confined in the first region, m1’ of the n1 second regions, and m2’ of the n2 third regions, where 0≤m1’≤n1 and 0≤m2’≤n2, m1≠m1’, and m2≠m2’.

[0004] Optionally, for displaying the first image frame in a first mode, the light emission of each sub-pixel is confined in the first region, m1=0, m2=0; and wherein, for displaying the second image frame in a second mode, the light emission of each sub-pixel is confined in the first region, the n1 second regions, and the n2 third regions, m1’=n1, m2’=n2.

[0005] Optionally, the display method further comprises, for displaying a third image frame in a third mode, controlling the light emission of each sub-pixel to be confined in the first region, m1” of the n1 second regions, and m2” of the n2 third regions, 1<m1”<n1, 1<m2”<n2, m1<m1”<m1’, m2<m2”<m2’.

[0006] Optionally, the first image frame is an image frame with relatively high image definition; and the second image frame is an image frame with relatively low image definition; and m1 < m1' and m2 < m2'.

[0007] Optionally, the display method further comprises: determining, by the one or more processors, image definition of each image frame; determining, by the one or more processors, an adjustment factor at least partially related to the image definition of the each image frame; and controlling values of m1, m2, m1' and m2' based on the adjustment factor.

[0008] Optionally, the display method further comprises: performing, by the one or more processors, Fourier transform on each image frame to obtain a high frequency component and a low frequency component; determining, by the one or more processors, an adjustment factor at least partially related to a ratio of the high frequency component to the low frequency component; and controlling values of m1, m2, m1' and m2' based on the adjustment factor.

[0009] Optionally, values of m1, m2, m1' and m2' of an image frame with a relatively high ratio of high frequency component to low frequency component are smaller than values of m1, m2, m1' and m2' of an image frame with a relatively low ratio of high frequency component to low frequency component.

[0010] Optionally, the display method further comprises: determining a gaze direction of a user, and determining a local area of the display panel intersected by the gaze direction, the local area being smaller than an area of the display panel; determining, by the one or more processors, image definition of a portion of each image frame configured to be displayed in the local area; determining, by the one or more processors, an adjustment factor at least partially related to the image definition of the portion of the each image frame; and controlling values of m1, m2, m1' and m2' for sub-pixels in the local area based on the adjustment factor.

[0011] Optionally, the display method further comprises: determining a gaze direction of a user, and determining a local area of the display panel intersected by the gaze direction, the local area being smaller than an area of the display panel; performing, by the one or more processors, Fourier transform on a portion of each image frame configured to be displayed in the local area to obtain a high frequency component and a low frequency component; determining, by the one or more processors, an adjustment factor at least partially related to a ratio of the high frequency component to the low frequency component of the portion of the each image frame; and controlling values of m1, m2, m1' and m2' for sub-pixels in the local area based on the adjustment factor.

[0012] Optionally, the display method further comprises controlling the values of m1, m2, m1' and m2' in the plurality of portions of each image frame respectively by: determining, by one or more processors, respective image sharpnesses of respective ones of the plurality of portions; determining, by the one or more processors, respective adjustment factors related at least in part to the respective image sharpnesses of the respective ones of the plurality of portions; and controlling, for sub-pixels configured to display the respective ones of the plurality of portions, the values of m1, m2, m1' and m2' based on the respective adjustment factors.

[0013] Optionally, the display method further comprises controlling the values of m1, m2, m1' and m2' in the plurality of portions of each image frame respectively by: performing, by one or more processors, a Fourier transform on respective ones of the plurality of portions to obtain respective low frequency components and respective high frequency components; determining, by the one or more processors, respective adjustment factors related at least in part to a ratio of the respective high frequency components to the respective low frequency components of the respective ones of the plurality of portions; and controlling, for sub-pixels configured to display the respective ones of the plurality of portions, the values of m1, m2, m1' and m2' based on the respective adjustment factors.

[0014] Optionally, controlling the values of m1, m2, m1' and m2' is performed manually by a user through a switch.

[0015] In another aspect, the present disclosure provides a display device comprising: a display panel comprising a plurality of sub-pixels, each of the plurality of sub-pixels comprising a first region, n1 second regions and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1 ≥ 1 and n2 ≥ 1; and one or more processors configured to: for displaying a first image frame, control the light emission of each sub-pixel to be confined in the first region, m1 of the n1 second regions and m2 of the n2 third regions, 0 ≤ m1 ≤ n1 and 0 ≤ m2 ≤ n2; and for displaying a second image frame, control the light emission of each sub-pixel to be confined in the first region, m1' of the n1 second regions and m2' of the n2 third regions, where 0 ≤ m1' ≤ n1 and 0 ≤ m2' ≤ n2, m1 ≠ m1' and m2 ≠ m2'.

[0016] Optionally, the one or more processors are further configured to: determine an image sharpness of each image frame; determine an adjustment factor related at least in part to the image sharpness of the respective image frame; and control the values of m1, m2, m1' and m2' based on the adjustment factor.

[0017] Optionally, the one or more processors are further configured to: perform a Fourier transform on each image frame to obtain low-frequency components and high-frequency components; determine an adjustment factor that is at least partially related to the ratio of the high-frequency components and the low-frequency components; and control the values ​​of m1, m2, m1' and m2' based on the adjustment factor.

[0018] Optionally, each sub-pixel includes a corresponding pixel driving circuit connected to a first light-emitting element configured to emit light in the first region, n1 second light-emitting elements configured to emit light in the n1 second regions, and n2 third light-emitting elements configured to emit light in the n2 third regions; and each pixel driving circuit includes (n1+n2) switches, which are respectively configured to individually connect or disconnect the driving current from the n1 second light-emitting elements and the n2 third light-emitting elements.

[0019] Optionally, the display device further includes a plurality of light modulation units, each of the plurality of light modulation units being configured to modulate the emission of light in each sub-pixel; wherein each light modulation unit includes n1 second light modulators and n2 third light modulators, the n1 second light modulators being configured to individually allow or disallow emission of light in the n1 second regions A2, and the n2 third light modulators being configured to individually allow or disallow emission of light in the n2 third regions A3.

[0020] Optionally, the display device further includes a camera configured to track a user's gaze; wherein the one or more processors are further configured to: determine the gaze direction of the user's gaze, and determine a local region of the display panel where the gaze direction intersects with the local region, the local region being smaller than the area of ​​the display panel; determine the image sharpness of a portion of each image frame configured to be displayed in the local region; determine an adjustment factor at least partially related to the image sharpness of the portion of each image frame; and, for sub-pixels in the local region, control the values ​​of m1, m2, m1', and m2' based on the adjustment factor.

[0021] Optionally, the display device further comprises a camera configured to track a gaze of the user; wherein the one or more processors are further configured to: determine a gaze direction of the gaze of the user, and determine a local area of the display panel that intersects the gaze direction, the local area being smaller than an area of the display panel; perform a Fourier transform on a portion of each image frame configured to be displayed in the local area to obtain a low frequency component and a high frequency component; determine an adjustment factor related at least in part to a ratio of the high frequency component to the low frequency component of the portion of each image frame; and control values of ml, m2, ml’ and m2’ for sub-pixels in the local area based on the adjustment factor.

[0022] Optionally, the one or more processors are further configured to control values of ml, m2, ml’ and m2’ in a plurality of portions of each image frame, respectively, by: determining, by the one or more processors, a respective image sharpness of each portion of the plurality of portions; determining, by the one or more processors, a respective adjustment factor related at least in part to the respective image sharpness of the each portion; and controlling values of ml, m2, ml’ and m2’ for sub-pixels configured to display the each portion based on the respective adjustment factor.

[0023] Optionally, the one or more processors are further configured to control values of ml, m2, ml’ and m2’ in a plurality of portions of each image frame, respectively, by: performing, by the one or more processors, a Fourier transform on each portion of the plurality of portions to obtain a respective low frequency component and a respective high frequency component; determining, by the one or more processors, a respective adjustment factor related at least in part to a ratio of the respective high frequency component to the respective low frequency component of the each portion; and controlling values of ml, m2, ml’ and m2’ for sub-pixels configured to display the each portion based on the respective adjustment factor.

[0024] Optionally, the display device further comprises a switch configured to control values of ml, m2, ml’ and m2’. BRIEF DESCRIPTION OF DRAWINGS

[0025] According to various disclosed embodiments, the following drawings are merely examples for illustrative purposes only and are not intended to limit the scope of the present invention.

[0026] Figure 1 is a comparison between an image without noticeable moire patterns (on the left) and an image with moire patterns (on the right).

[0027] Figure 2 is a comparison between an image without noticeable sub-pixel cross-talk (on the left) and an image with cross-talk (on the right).

[0028] Figure 3 The effect of moire fringes and cross-talk on images with different sharpness is shown.

[0029] Figure 4 Cross-talk occurring in a display device is shown.

[0030] Figure 5 Moire fringes appearing in a display device are shown.

[0031] Figure 6 is a schematic diagram showing a plurality of sub-pixels in a display device in accordance with some embodiments of the disclosure.

[0032] Figure 7 is a plan view of a plurality of sub-pixels in a display device in accordance with some embodiments of the disclosure.

[0033] Figure 8 A method of displaying sub-pixel images in accordance with some embodiments of the disclosure is shown.

[0034] Figure 9 Displaying sub-pixel images in a first mode is shown.

[0035] Figure 10 Displaying sub-pixel images in a second mode is shown.

[0036] Figure 11 Displaying sub-pixel images in image frames with relatively higher image sharpness is shown.

[0037] Figure 12 Displaying sub-pixel images in image frames with relatively lower image sharpness is shown.

[0038] Figure 13 A process of automatically controlling the values of ml, m2, ml’ and m2’ is shown.

[0039] Figure 14 A process of automatically controlling the values of ml, m2, ml’ and m2’ is shown.

[0040] Figure 15 A process of automatically controlling the values of ml, m2, ml’ and m2’ is shown.

[0041] Figure 16 is a schematic diagram showing the structure of a pixel driving circuit in accordance with some embodiments of the disclosure.

[0042] Figure 17 is a schematic diagram showing the structure of a plurality of light modulating units in accordance with some embodiments of the disclosure. DETAILED DESCRIPTION

[0043] The present disclosure will now be described in greater particularity by reference to the following examples. It is noted that the following description of some examples presented herein is merely illustrative and is in no way limiting. It is not exhaustive or limited to the precise forms disclosed.

[0044] The present disclosure provides, among other things, a display method and a display device that substantially obviate one or more problems due to limitations and disadvantages of the related art. In one aspect, the present disclosure provides a display method. In some embodiments, the display method includes providing a display panel including a plurality of sub-pixels, each of the plurality of sub-pixels including a first region, n1 second regions, and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1 ≥ 1, and n2 ≥ 1; controlling, for displaying a first image frame, light emission of each of the sub-pixels to be confined in the first region, m1 of the n1 second regions, and m2 of the n2 third regions, 0 ≤ m1 ≤ n1, and 0 ≤ m2 ≤ n2; and controlling, for displaying a second image frame, light emission of each of the sub-pixels to be confined in the first region, m1’ of the n1 second regions, and m2’ of the n2 third regions, where 0 ≤ m1’ ≤ n1, and 0 ≤ m2’ ≤ n2, m1 ≠ m1’, and m2 ≠ m2’.

[0045] In existing display panels, two issues affect image display quality. The first issue relates to Moire fringes. One possible cause of Moire fringes is due to the gap region between adjacent sub-pixels, which is usually arranged in repeating fringes. In a display panel having a gap region between adjacent sub-pixels, particularly in a display panel having micro-lenses on the sub-pixels, Moire fringes can be apparent. Figure 1 is a comparison between an image without apparent Moire fringes (on the left) and an image with Moire fringes (on the right).

[0046] The second issue relates to crosstalk between adjacent sub-pixels. In one example, in a display panel having micro-lenses on the sub-pixels, when a sub-pixel is located at the focal point of a micro-lens, light emitted from each sub-pixel is converted by the respective micro-lens into a light beam. For example, a first sub-pixel emits light, which is concentrated by a first micro-lens into a first light beam, a second sub-pixel emits light, and which is concentrated by a second micro-lens into a second light beam. Ideally, both the first light beam and the second light beam are collimated light beams. However, because the sub-pixels have a certain size, the light beams produced by the micro-lenses are not completely collimated, but inevitably have a certain angle of divergence. Due to the angle of divergence, the second light beam, which is not designed to be detected in the viewpoint (eye), will partially enter the viewpoint, resulting in crosstalk. Figure 2is a comparison between an image without noticeable inter-sub-pixel crosstalk (on the left) and an image with crosstalk (on the right).

[0047] The inventors of the present disclosure found that sometimes the occurrence of Moire fringes and crosstalk are due to opposite reasons entirely. For example, crosstalk is prone to occur when adjacent sub-pixels are too close to each other, while Moire fringes are prone to occur when adjacent sub-pixels are spaced too far apart resulting in large inter-sub-pixel gaps. The inventors of the present disclosure found that, surprisingly and unexpectedly, a synergistic effect can be achieved by employing a new display panel having a unique structure and a corresponding display method.

[0048] Figure 3 The impact of Moire fringes and crosstalk on images having different sharpness is shown. Referring to Figure 3 , the face image in the upper left corner is an image having relatively high sharpness with full details; the landscape image in the lower left corner is an image having relatively low sharpness with less details and is rather monotonous. The face image in the middle of the upper row is an image having Moire fringes, while the face image in the upper right corner is an image having crosstalk. The landscape image in the middle of the lower row is an image having Moire fringes, and the landscape image in the lower right corner is an image having crosstalk. The inventors of the present disclosure found that for relatively high sharpness images having more details (e.g., face images), the visual impact of Moire fringes on user experience is much lower than the crosstalk defect, while for relatively low sharpness images having less details (e.g., landscape images), the visual impact of crosstalk on user experience is much lower than the Moire fringes defect.

[0049] The inventors of the present disclosure found that the problems of Moire patterns and crosstalk are particularly problematic in three-dimensional displays. In one example, the inventors of the present disclosure found that these problems become more prominent in autostereoscopic three-dimensional display devices such as light field display devices. Typically, autostereoscopic three-dimensional display devices use lenticular lens gratings (e.g., liquid crystal lenticular lens gratings) or parallax barrier gratings (e.g., liquid crystal parallax barrier gratings) to achieve three-dimensional image display. However, the display method and display device according to the present disclosure are not limited to three-dimensional display and can be implemented in any appropriate image display method and image display device, including two-dimensional display.

[0050] Figure 4 The occurrence of crosstalk in a display device is shown. Referring to Figure 4 , three sub-pixels sp1, sp2, and sp3 of a display device are shown. Light beams corresponding to the sub-pixels sp1, sp2, and sp3 are denoted by lb1, lb2, and lb3. As Figure 4 shown, the three sub-pixels sp1, sp2, and sp3 are relatively close to each other. When the inter-sub-pixel distance is relatively small, adjacent light beams partially overlap each other, as Figure 4The overlapping regions ol are shown in FIG. 1. For example, the light beam lb1 partially overlaps the light beam lb2, and the light beam lb3 partially overlaps the light beam lb2, resulting in cross-talk between the sub-pixels sp1 and sp2, and between the sub-pixels sp2 and sp3.

[0051] Figure 5 Moire fringes are shown to occur in the display device. Referring to Figure 5 , the three sub-pixels sp1, sp2, and sp3 are spaced apart relative to each other. As a result, adjacent light beams are spaced apart from each other, forming gaps between adjacent light beams, as shown by the gap regions G in Figure 5 . For example, there is a gap between the first light beam lb1 and the second light beam lb2, and a gap between the third light beam lb3 and the second light beam lb2, resulting in Moire fringes.

[0052] Figure 6 is a schematic diagram showing a plurality of sub-pixels in a display device in some embodiments according to the present disclosure. Figure 7 is a plan view of a plurality of sub-pixels in a display device in some embodiments according to the present disclosure. Referring to Figure 6 and Figure 7In some embodiments, the display panel includes a plurality of sub-pixels sp. Optionally, each of the plurality of sub-pixels sp includes a first area A1, n1 second areas A2, and n2 third areas A3. The first area A1 is located between the n1 second areas A2 and the n2 third areas A3. Optionally, n1≥1. Optionally, n2≥1. Optionally, n1=n2. The display panel further includes a plurality of gate lines GL configured to provide driving signals to the plurality of sub-pixels sp and a plurality of data lines DL configured to provide data signals to the plurality of sub-pixels sp. As used herein, the term “sub-pixel” refers to a unit that receives the same data signal. For example, any one of the first area A1, the n1 second areas A2, and the n2 third areas A3 in the same sub-pixel is configured to receive the same data signal. For example, when the first area A1, the n1 second areas A2, and the n2 third areas A3 in the same sub-pixel are all configured to emit light, they are driven by the same driving signal while the same data signal is provided. In one example, the display panel further includes an additional area(s) configured to emit light between the first area A1 and the n1 second areas A2; and / or an additional area(s) configured to emit light between the first area A1 and the n2 third areas A3; the additional area(s) is in the same sub-pixel as the first area A1, the n1 second areas A2, and the n2 third areas A3, and is configured to receive the same data signal as the first area A1, the n1 second areas A2, and the n2 third areas A3. In another example, the display panel is free of any additional area(s) configured to emit light between the first area A1 and the n1 second areas A2; or free of any additional area(s) configured to emit light between the first area A1 and the n2 third areas A3.

[0053] In the present display method, in order to display at least two different image frames, each sub-pixel is configured to display two sub-pixel images respectively using different areas. Figure 8 A method of displaying sub-pixel images according to some embodiments of the present disclosure is shown. Reference is made to Figure 8In some embodiments, the display method comprises providing a display panel comprising a plurality of sub-pixels, each sub-pixel of the plurality of sub-pixels comprising a first region, n1 second regions, and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1≥1, n2≥1; to display a first image frame, controlling the light emission of each sub-pixel to be confined in the following regions: the first region, m1 second regions of the n1 second regions, and m2 third regions of the n2 third regions, where 0≤m1≤n1 and 0≤m2≤n2; and to display a second image frame, controlling the light emission of each sub-pixel to be confined in the following regions: the first region, m1’ second regions of the n1 second regions, and m2’ third regions of the n2 third regions, where 0≤m1’≤n1 and 0≤m2’≤n2, m1≠m1’ and m2≠m2’.

[0054] In one example, n1=n2=1; m1=m2=0, and m1’=m2’=1.

[0055] Figure 9 A sub-pixel image is shown in the first mode. In the first mode, only the first region A1 is configured to emit light, while the n1 second regions A2 and the n2 third regions A3 are configured not to emit light. Because the light emission region of each sub-pixel is confined to the first region A1, the light beams are relatively narrow. As shown, adjacent light beams are spaced apart from each other, thereby forming gaps between adjacent light beams. For example, there is a gap between the first light beam lb1 and the second light beam lb2, and a gap between the third light beam lb3 and the second light beam lb2, resulting in Moire fringes. Figure 9

[0056] Figure 10 A sub-pixel image is shown in the second mode. In the second mode, the first region A1, the n1 second regions A2, and the n2 third regions A3 are all configured to emit light. Because all the light emission regions of each sub-pixel are used for light emission, the light beams are relatively more divergent. As shown, adjacent light beams partially overlap with each other. For example, the light beam lb1 partially overlaps with the light beam lb2, and the light beam lb3 partially overlaps with the light beam lb2, resulting in crosstalk between the sub-pixels sp1 and sp2, and between the sub-pixels sp2 and sp3. Figure 10

[0057] ​​In some embodiments, the display method includes displaying a first image frame in a first mode, and displaying a second image frame in a second mode. As described above, the inventors of the present disclosure found that for a relatively high definition image with more details (e.g., a face image), the visual impact of Moire fringes on user experience is much lower than that of crosstalk defects, while for a relatively low definition image with less details (e.g., a landscape image), the visual impact of crosstalk on user experience is much lower than that of Moire fringe defects. Therefore, in some embodiments, the first image frame displayed in the first mode is an image frame with relatively high definition and more details, and the second image frame displayed in the second mode is an image frame with relatively low definition and less details.

[0058] The display modes are not limited to the first mode and the second mode. In some embodiments, the display method further includes displaying a third image frame in a third mode. The display method includes controlling the light emission of each sub-pixel to be confined in the first region, m1” of the n1 second regions, and m2” of the n2 third regions. Optionally, 1 < m1” < n1, and 1 < m2” < n2.

[0059] The image frame with relatively high definition and more details can be displayed in the first mode. Alternatively, the image frame with relatively high definition and more details can be displayed in the third mode. The image frame with relatively low definition and less details can be displayed in the second mode. Alternatively, the image frame with relatively low definition and less details can be displayed in the third mode.

[0060] In some embodiments, the first image frame is an image frame with relatively high image definition; and the second image frame is an image frame with relatively low image definition. Optionally, m1 < m1’ and m2 < m2’. Figure 11 The display of sub-pixel images in an image frame with relatively high image definition is shown in FIG. 1A. In FIG. 1A, m1 = m2 = 1. When displaying an image frame with relatively high image definition, the first region A1, only one of the n1 second regions A2, and only one of the n2 third regions A3 are configured to emit light, while the other (n1-1) second regions and the other (n2-1) third regions are configured not to emit light. Because the light emission region of each sub-pixel is confined in the first region A1, only one of the n1 second regions A2, and only one of the n2 third regions A3, the light beams are relatively narrow. As shown in FIG. 1A, adjacent light beams are spaced apart from each other, thereby forming gaps between adjacent light beams. For example, there is a gap between the first light beam lb1 and the second light beam lb2, and a gap between the third light beam lb3 and the second light beam lb2, resulting in Moire fringes. Figure 11 Figure 11 The display of sub-pixel images in an image frame with relatively low image definition is shown in FIG. 1B. In FIG. 1B, m1 = m1’ = 1, and m2 = m2’ = 2. When displaying an image frame with relatively low image definition, the first region A1, only one of the n1 second regions A2, and two of the n2 third regions A3 are configured to emit light, while the other (n1-1) second regions and the other (n2-1) third regions are configured not to emit light. Because the light emission region of each sub-pixel is confined in the first region A1, only one of the n1 second regions A2, and two of the n2 third regions A3, the light beams are relatively wide. As shown in FIG. 1B, adjacent light beams overlap with each other, thereby causing crosstalk.​

[0061] Figure 12 It is shown that sub-pixel images are displayed in image frames with relatively lower image sharpness. In Figure 12 m1’ = m2’ = 3. When displaying image frames with relatively lower image sharpness, the first region A1, (n1-3) of the n1 second regions A2, and (n2-3) of the n2 third regions A3 are configured to not emit light. Because most of the light emitting region of each sub-pixel is used for light emission, the light beams are relatively more divergent. As shown in Figure 12 adjacent light beams partially overlap with each other. For example, the light beam lb1 partially overlaps with the light beam lb2, and the light beam lb3 partially overlaps with the light beam lb2, resulting in crosstalk between the sub-pixels sp1 and sp2, and between the sub-pixels sp2 and sp3.

[0062] In some embodiments, the values of m1, m2, m1’ and m2’ are controlled by a user manually through a switch. The user can manually adjust the values of m1, m2, m1’ and m2’ until the user’s experience of watching an image (e.g., a video) is optimized. Furthermore, the display method enables the user to adjust the values of m1, m2, m1’ and m2’ in real time. In one example, the display method provides (n+1) options (e.g., in numerical order), where n = n1 = n2.

[0063] In some embodiments, the values of m1, m2, m1’ and m2’ are controlled, for example, automatically by a processor. In some embodiments, the display method further comprises determining, by one or more processors, an image sharpness of each image frame; determining, by the one or more processors, an adjustment factor at least partially related to the image sharpness of each image frame; and controlling the values of m1, m2, m1’ and m2’ based on the adjustment factor. In some embodiments, the higher the image sharpness, the lower the values of m1, m2, m1’ and m2’.

[0064] Various appropriate methods can be used to determine the image sharpness. In some embodiments, the determination of the image sharpness is performed using a Fourier transform algorithm. In some embodiments, the display method comprises performing, by one or more processors, a Fourier transform on each image frame to obtain low frequency components and high frequency components; determining, by the one or more processors, an adjustment factor at least partially related to a ratio of the high frequency components to the low frequency components; and controlling the values of m1, m2, m1’ and m2’ based on the adjustment factor. Specifically, in one example, the Fourier transform algorithm can be represented as:

[0065]

[0066] where M and N represent the number of columns and rows of sub-pixels, and F(u, v) represents the frequency. The frequency of an image represents the degree of variation of the gray levels throughout the image, and the frequency of an image can be considered as the gradient of the gray levels in a two-dimensional space. For example, a monotonous image (image of a dessert) has a relatively low frequency because the gray levels of the image vary very little in different parts of the image. A high-definition image with full details corresponds to a relatively high frequency obtained by Fourier transform. The higher the frequency, the higher the definition of the image.

[0067] In some embodiments, the values of m1, m2, m1’ and m2’ are smaller for image frames with a relatively high ratio of high frequency components to low frequency components than for image frames with a relatively low ratio of high frequency components to low frequency components. Optionally, an image frame can be considered as a high-definition image when the ratio of high frequency components to low frequency components is greater than a threshold value (e.g. 1:1).

[0068] In some embodiments, the one or more processors comprise a graphics processing unit (GPU) and a timing controller. Figure 13 A process of automatically controlling the values of m1, m2, m1’ and m2’ is shown. Reference is made to Figure 13 In some embodiments, a graphics processing unit (GPU) is configured to compute individual image frames; perform a Fourier transform on the individual image frames to obtain low frequency components and high frequency components, and determine an adjustment factor related at least in part to a ratio of the high frequency components to the low frequency components. A printed circuit board (PCB) receives information of the individual image frames. A timing controller (Tcon) in the printed circuit board (PCB) is configured to convert the information of the individual image frames into a data signal, and send the data signal to a display panel (DP). In addition, the timing controller (Tcon) is further configured to compute the values of m1, m2, m1’ and m2’ based on the adjustment factor. As mentioned above (e.g. in Figure 9 to Figure 12 The display panel is configured to control the light emitting areas based on the values of m1, m2, m1’ and m2’, as mentioned above (e.g. in

[0069] In some embodiments, an image frame can comprise portions with different characteristics. For example, an image frame can comprise a first portion as a monotonous background portion, and a second portion as a high-definition, highly detailed foreground portion. For the first portion, the visual impact of the crosstalk on the user experience is much lower than the Moire fringe defect. For the second portion, the visual impact of the Moire fringe on the user experience is much lower than the crosstalk defect. Therefore, the present method also provides a solution for significantly enhancing the experience of a user when viewing this type of image frame.

[0070] In some embodiments, the present display method comprises first determining a gaze direction of the user, and determining a local region of the display panel intersected by the gaze direction, the local region being smaller than the region of the display panel. When the user gazes at a first portion, the display method automatically adjusts the values of m1, m2, m1’ and m2’ to increase the light-emitting region of each sub-pixel in the local region. When the user gazes at a second portion, the display method automatically adjusts the values of m1, m2, m1’ and m2’ to decrease the light-emitting region of each sub-pixel in the local region.

[0071] In some embodiments, the present display method further comprises determining, by the one or more processors, an image sharpness of a portion of each image frame configured to be displayed in the local region; determining, by the one or more processors, an adjustment factor related at least in part to the image sharpness of the portion of each image frame; and for sub-pixels in the local region, controlling the values of m1, m2, m1’ and m2’ based on the adjustment factor.

[0072] In particular, in some embodiments, the determination of the image sharpness is performed using a Fourier transform algorithm, as described above. Thus, in some embodiments, the present display method comprises determining a gaze direction of the user, and determining a local region of the display panel intersected by the gaze direction, the local region being smaller than the region of the display panel; performing, by the one or more processors, a Fourier transform on a portion of each image frame configured to be displayed in the local region to obtain low frequency components and high frequency components; determining, by the one or more processors, an adjustment factor related at least in part to a ratio of the high frequency components to the low frequency components of the portion of each image frame; and for sub-pixels in the local region, controlling the values of m1, m2, m1’ and m2’ based on the adjustment factor.

[0073] Figure 14 The process of automatically controlling the values of m1, m2, m1’ and m2’ is illustrated. Referring to Figure 14In some embodiments, the eye tracker ET is configured to determine a gaze direction of a user, and determine a local region of the display panel intersected by the gaze direction, the local region being smaller than a region of the display panel. The graphics processing unit GPU is configured to compute respective image frames; perform a Fourier transform on a portion of the respective image frames configured to be displayed in the local region; and determine an adjustment factor at least partially related to a ratio of high frequency components to low frequency components of the portion of the respective image frames. The printed circuit board PCB receives information of the respective image frames. The timing controller Tcon in the printed circuit board PCB is configured to convert the information of the respective image frames into a data signal, and send the data signal to the display panel DP. Further, the timing controller Tcon is also configured to calculate values of m1, m2, m1’ and m2’ based on the adjustment factor for sub-pixels in the local region. The display panel is configured to control the light emitting regions based on the values of m1, m2, m1’ and m2’ for the sub-pixels in the local region.

[0074] In some embodiments, the respective image frames contain a plurality of portions, e.g., a first portion and a second portion having different sharpnesses as discussed above. In some embodiments, the display method includes controlling values of m1, m2, m1’ and m2’ in the plurality of portions of the respective image frames respectively. In some embodiments, controlling values of m1, m2, m1’ and m2’ in the plurality of portions of the respective image frames respectively includes determining, by one or more processors, respective image sharpnesses of respective ones of the plurality of portions; determining, by the one or more processors, respective adjustment factors at least partially related to the respective image sharpnesses of the respective ones of the plurality of portions; and controlling values of m1, m2, m1’ and m2’ for sub-pixels configured to display the respective ones of the plurality of portions based on the respective adjustment factors.

[0075] In particular, in some embodiments, the determination of image sharpness is performed using a Fourier transform algorithm as described above. Thus, in some embodiments, the display method includes performing, by one or more processors, a Fourier transform on respective ones of the plurality of portions to obtain respective low frequency components and respective high frequency components; determining, by the one or more processors, respective adjustment factors at least partially related to a ratio of the respective high frequency components to the respective low frequency components of the respective ones of the plurality of portions; and controlling values of m1, m2, m1’ and m2’ for sub-pixels configured to display the respective ones of the plurality of portions based on the respective adjustment factors.

[0076] Figure 15 A process of automatically controlling values of m1, m2, m1’ and m2’ is shown. Referring to Figure 15In some embodiments, a graphics processing unit (GPU) is configured to calculate each image frame; perform a Fourier transform on each of the plurality of portions to obtain a low frequency component and a high frequency component, and determine a respective adjustment factor related at least in part to a ratio of the respective high frequency component to the respective low frequency component of each portion. A printed circuit board (PCB) receives information of each image frame. A timing controller (Tcon) in the printed circuit board (PCB) is configured to convert the information of each image frame into a data signal, and send the data signal to a display panel (DP). In addition, the timing controller (Tcon) is further configured to calculate values of m1, m2, m1’ and m2’ based on the adjustment factor for sub-pixels configured to display each portion. The display panel is configured to control the light emitting area based on the values of m1, m2, m1’ and m2’ for the sub-pixels configured to display each portion.

[0077] In another aspect, the present disclosure provides a display device. In some embodiments, the display device includes a display panel including a plurality of sub-pixels, each sub-pixel of the plurality of sub-pixels including a first area, n1 second areas and n2 third areas, the first area being between the n1 second areas and the n2 third areas, n1≥1, n2≥1; and one or more processors. Optionally, the one or more processors include a graphics processing unit and a timing controller, as shown in Figure 13 to Figure 15

[0078] In some embodiments, the one or more processors are configured to, for displaying a first image frame, control the light emission of each sub-pixel to be confined in the first area, m1 of the n1 second areas, and m2 of the n2 third areas, 0≤m1≤n1 and 0≤m2≤n2; and for displaying a second image frame, control the light emission of each sub-pixel to be confined in the first area, m1’ of the n1 second areas, and m2’ of the n2 third areas, 0≤m1’≤n1 and 0≤m2’≤n2 and m1≠m1’ and m2≠m2’.

[0079] Optionally, for displaying the first image frame in the first mode, the light emission of each sub-pixel is confined in the first area, m1=0, m2=0. Optionally, for displaying the second image frame in the second mode, the light emission of each sub-pixel is confined in the first area, n1 second areas and n2 third areas, m1’=n1, m2’=n2.

[0080] ​In some embodiments, the one or more processors are configured to, for displaying the third image frame in the third mode, limit the light emission of each sub-pixel in the first region, m1” of the n1 second regions, and m2” of the n2 third regions. Optionally, 1 < m1” < n1, 1 < m2” < n2, m1 < m1” < m1’, and m2 < m2” < m2’.

[0081] In some embodiments, the first image frame is an image frame with relatively higher image definition; the second image frame is an image frame with relatively lower image definition; and m1 < m1’, and m2 < m2’.

[0082] In some embodiments, the one or more processors are configured to determine the image definition of each image frame; determine an adjustment factor at least partially related to the image definition of each image frame; and based on the adjustment factor, control the values of m1, m2, m1’, and m2’.

[0083] In some embodiments, the one or more processors are configured to perform a Fourier transform on each image frame to obtain low frequency components and high frequency components; determine an adjustment factor at least partially related to a ratio of the high frequency components to the low frequency components; and based on the adjustment factor, control the values of m1, m2, m1’, and m2’. Optionally, the values of m1, m2, m1’, and m2’ for an image frame with a relatively higher ratio of high frequency components to low frequency components are smaller than the values of m1, m2, m1’, and m2’ for an image frame with a relatively lower ratio of high frequency components to low frequency components.

[0084] In some embodiments, the one or more processors are configured to determine a gaze direction of a user, and determine a local region of the display panel intersected by the gaze direction, the local region being smaller than a region of the display panel; determine an image definition of a portion of each image frame configured to be displayed in the local region; determine an adjustment factor at least partially related to the image definition of the portion of each image frame; and for sub-pixels in the local region, based on the adjustment factor, control the values of m1, m2, m1’, and m2’.

[0085] In some embodiments, the one or more processors are configured to determine a gaze direction of a user, and determine a local area of the display panel that intersects the gaze direction, the local area being smaller than an area of the display panel; perform a Fourier transform on a portion of each image frame configured to be displayed in the local area to obtain a low frequency component and a high frequency component; determine an adjustment factor related at least in part to a ratio of the high frequency component to the low frequency component of the portion of each image frame; and control values of m1, m2, m1’ and m2’ for sub-pixels in the local area based on the adjustment factor.

[0086] In some embodiments, the one or more processors are configured to control values of m1, m2, m1’ and m2’ in a plurality of portions of each image frame, respectively. In some embodiments, the one or more processors are configured to determine a respective image sharpness of each portion of the plurality of portions; determine a respective adjustment factor related at least in part to the respective image sharpness of each portion; and control values of m1, m2, m1’ and m2’ for sub-pixels configured to display each portion based on the respective adjustment factor.

[0087] In some embodiments, the one or more processors are configured to control values of m1, m2, m1’ and m2’ in a plurality of portions of each image frame, respectively. In some embodiments, the one or more processors are configured to perform a Fourier transform on each portion of the plurality of portions to obtain a respective low frequency component and a respective high frequency component; determine a respective adjustment factor related at least in part to a ratio of the respective high frequency component to the respective low frequency component of each portion; and control values of m1, m2, m1’ and m2’ for sub-pixels configured to display each portion based on the respective adjustment factor.

[0088] In some embodiments, the display device further comprises a switch (virtual or physical) that allows a user to manually control values of m1, m2, m1’ and m2’.

[0089] In some embodiments, the display device further comprises a camera configured to track a gaze of a user.

[0090] In some embodiments, each sub-pixel includes a respective pixel driving circuit and a plurality of light emitting elements connected in parallel. Various suitable pixel driving circuits can be used in the present array substrate. Examples of suitable driving circuits include 3T1C, 2T1C, 4T1C, 4T2C, 5T2C, 6T1C, 7T1C, 7T2C, 8T1C, and 8T2C. In some embodiments, each of the plurality of pixel driving circuits is a 7T1C driving circuit. Various suitable light emitting elements can be used in the present array substrate. Examples of suitable light emitting elements include organic light emitting diodes, quantum dot light emitting diodes, mini light emitting diodes, and micro light emitting diodes. Optionally, the light emitting elements are mini light emitting diodes. Optionally, the light emitting elements are micro light emitting diodes. Optionally, the light emitting elements are organic light emitting diodes including an organic light emitting layer.

[0091] Figure 16 is a schematic diagram showing the structure of a pixel driving circuit in some embodiments according to the present disclosure. Referring to Figure 16 , each sub-pixel includes a respective pixel driving circuit RPDC. Figure 16 An exemplary 2T1C driving circuit with a plurality of switches added is shown. Each pixel driving circuit RPDC is connected to a plurality of light emitting elements connected in parallel. Each pixel driving circuit RPDC is connected to a first light emitting element configured to emit light in a first region A1, to n1 second light emitting elements LE2 configured to emit light in n1 second regions A2, and to n2 third light emitting elements LE3 configured to emit light in n2 third regions A3. Each pixel driving circuit RPDC includes a total of (n1 + n2) switches respectively configured to individually connect or disconnect driving currents from the n1 second light emitting elements LE2 and the n2 third light emitting elements LE3. Specifically, each pixel driving circuit RPDC includes n1 second switches SW2 respectively configured to individually connect or disconnect driving currents (e.g., driving currents flowing out of the drain of the driving transistor Td) from the n1 second light emitting elements LE2, and n2 third switches SW3 respectively configured to individually connect or disconnect driving currents from the n2 third light emitting elements LE3.

[0092] In some embodiments, to display the first image frame, the one or more processors are configured to control m1 of the n1 second switches SW2 to be in the connection state, and control m2 of the n2 third switches SW3 to be in the connection state, thereby controlling the light emission of each sub-pixel to be limited in the first area A1, m1 of the n1 second areas A2, and m2 of the n2 third areas A3, 0≤m1≤n1, and 0≤m2≤n2. Optionally, to display the first image frame, the one or more processors are configured to control (n1-m1) of the n1 second switches SW2 to be in the disconnection state, and control (n2-m2) of the n2 third switches SW3 to be in the disconnection state. Optionally, the m1 of the n1 second areas A2 are the m1 second areas closest to the first area A1 (relative to the (n1-m1) of the n1 second areas A2), and the m2 of the n2 third areas are the m2 third areas closest to the first area A1 (relative to the (n2-m2) of the n2 third areas). Optionally, the (n1-m1) of the n1 second areas A2 are the (n1-m1) second areas farthest from the first area A1 (relative to the m1 of the n1 second areas A2), and the (n2-m2) of the n2 third areas are the (n2-m2) third areas farthest from the first area A1 (relative to the m2 of the n2 third areas).

[0093] When displaying the first image frame, the first light emitting element LE1, m1 of the n1 second light emitting elements LE2, and m2 of the n2 third light emitting elements LE3 are configured to emit light; and (n1-m1) of the n1 second light emitting elements LE2 and (n2-m2) of the n2 third light emitting elements LE3 are configured not to emit light.

[0094] In some embodiments, to display the second image frame, the one or more processors are configured to control m1' of the n1 second switches SW2 to be in the connection state, and control m2' of the n2 third switches SW3 to be in the connection state, thereby controlling the light emission of each sub-pixel to be limited in the first area A1, m1' of the n1 second areas A2, and m2' of the n2 third areas A3, 0≤m1'≤n1, and 0≤m2'≤n2, m1≠m1' and m2≠m2'. Optionally, to display the second image frame, the one or more processors are configured to control (n1-m1') of the n1 second switches SW2 to be in the disconnection state, and control (n2-m2') of the n2 third switches SW3 to be in the disconnection state. Optionally, the m1' of the n1 second areas A2 are the m1' second areas closest to the first area A1 (relative to the (n1-m1') of the n1 second areas A2), and the m2' of the n2 third areas are the m2' third areas closest to the first area A1 (relative to the (n2-m2') of the n2 third areas). Optionally, the (n1-m1') of the n1 second areas A2 are the (n1-m1') second areas farthest from the first area A1 (relative to the m1' of the n1 second areas A2), and the (n2-m2') of the n2 third areas A3 are the (n2-m2') third areas farthest from the first area A1 (relative to the m2' of the n2 third areas A3).

[0095] When displaying the second image frame, the first light emitting element LE1, m1' of the n1 second light emitting elements LE2, and m2' of the n2 third light emitting elements LE3 are configured to emit light; and (n1-m1') of the n1 second light emitting elements LE2 and (n2-m2') of the n2 third light emitting elements LE3 are configured not to emit light.

[0096] Figure 16 The correspondence between the light emitting elements and the light emitting areas is shown. The first light emitting element LE1 corresponds to the first area A1. The n1 second light emitting elements LE2 correspond to the n1 second areas A2. The n2 third light emitting elements LE3 correspond to the n2 third areas A3.

[0097] In some embodiments, the display device includes a plurality of light modulation units, each light modulation unit of the plurality of light modulation units is configured to modulate light emission in a respective sub-pixel. In one specific example, the display panel is a liquid crystal display panel, and the light modulators including the plurality of light modulation units are liquid crystal light modulators. The liquid crystal light modulators can modulate light transmission through the liquid crystal material in the liquid crystal light modulators by applying a voltage on the liquid crystal material. Figure 17 is a schematic diagram showing the structure of a plurality of light modulation units in some embodiments according to the present disclosure. Referring to Figure 17 In some embodiments, the display device includes a display panel DP, each light modulation unit RLU of a plurality of light modulation units. The plurality of light modulation units respectively correspond to a plurality of sub-pixels. Figure 17 A single sub-pixel (denoted by sp) and a single light modulation unit (denoted by RLU) are shown.

[0098] In some embodiments, each light modulation unit RLU includes n1 second light modulators LM2 and n2 third light modulators LM3, the n1 second light modulators LM2 are configured to individually allow or not allow light emission in n1 second regions A2, and the n2 third light modulators LM3 are configured to individually allow or not allow light emission in n2 third regions A3.

[0099] In some embodiments, to display the first image frame, the one or more processors are configured to control m1 of the n1 second light modulators LM2 to be in a light-transmissive state and m2 of the n2 third light modulators LM3 to be in a light-transmissive state, thereby controlling the light emission of each sub-pixel to be confined in the first area A1, m1 of the n1 second areas A2, and m2 of the n2 third areas A3, 0≤m1≤n1, and 0≤m2≤n2. Optionally, to display the first image frame, the one or more processors are configured to control (n1-m1) of the n1 second light modulators LM2 to be in a light-blocking state, and (n2-m2) of the n2 third light modulators LM3 to be in a light-blocking state. Optionally, the m1 of the n1 second areas A2 are the m1 second areas closest to the first area A1 (relative to the (n1-m1) of the n1 second areas A2), and the m2 of the n2 third areas are the m2 third areas closest to the first area A1 (relative to the (n2-m2) of the n2 third areas). Optionally, the (n1-m1) of the n1 second areas A2 are the (n1-m1) second areas farthest from the first area A1 (relative to the m1 of the n1 second areas A2), and the (n2-m2) of the n2 third areas are the (n2-m2) third areas farthest from the first area A1 (relative to the m2 of the n2 third areas A3).

[0100] In displaying the first image frame, each sub-pixel in the display panel DP is configured to emit light, the light emitted from each sub-pixel and in the first area A1 is not blocked, and is transmitted through the corresponding light modulation unit RLU. The light emitted from each sub-pixel and in the m1 of the n1 second areas A2 and the m2 of the n2 third areas is not blocked, and is transmitted through the corresponding light modulation unit RLU. The light emitted from each sub-pixel and in the (n1-m1) of the n1 second areas A2 and the (n2-m2) of the n2 third areas A3 is blocked.

[0101] In some embodiments, to display the second image frame, the one or more processors are configured to control m1’ of the n1 second light modulators LM2 to be in the light-transmissive state and m2’ of the n2 third light modulators LM3 to be in the light-transmissive state, thereby controlling the light emission of each sub-pixel to be confined in the first area A1, m1’ of the n1 second areas A2, and m2’ of the n2 third areas A3, 0≤m1’≤n1, and 0≤m2’≤n2, m1≠m1’ and m2≠m2’. Optionally, to display the second image frame, the one or more processors are configured to control (n1-m1’) of the n1 second light modulators LM2 to be in the light-blocking state, and (n2-m2’) of the n2 third light modulators LM3 to be in the light-blocking state. Optionally, the m1’ of the n1 second areas A2 are the m1’ of the second areas closest to the first area A1 (relative to the (n1-m1’) of the n1 second areas A2), and the m2’ of the n2 third areas are the m2’ of the third areas closest to the first area A1 (relative to the (n2-m2’) of the n2 third areas A3). Optionally, the (n1-m1’) of the n1 second areas A2 are the (n1-m1’) of the second areas farthest from the first area A1 (relative to the m1’ of the n1 second areas A2), and the (n2-m2’) of the n2 third areas A3 are the (n2-m2’) of the third areas farthest from the first area A1 (relative to the m2’ of the n2 third areas A3).

[0102] In displaying the second image frame, each sub-pixel in the display panel DP is configured to emit light, the light emitted from each sub-pixel and in the first area A1 is not blocked, and is transmitted through the corresponding light modulation unit RLU. The light emitted from each sub-pixel and in the m1’ of the n1 second areas A2 and the m2’ of the n2 third areas is not blocked, and is transmitted through the corresponding light modulation unit RLU. The light emitted from each sub-pixel and in the (n1-m1’) of the n1 second areas A2 and the (n2-m2’) of the n2 third areas A3 is blocked.

[0103] Figure 17 The correspondence between the light modulation units and the light-emitting areas is shown. The n1 second light modulation units LM2 correspond to the n1 second areas A2. The n2 third light modulation units LM3 correspond to the n2 third areas A3. Although Figure 17A first light modulation unit LM1 corresponding to the first area Al is shown, but the first light modulation unit LM1 is optional. In an alternative example, there is no light modulation unit in the first area Al.

[0104] Figure 17 A specific example is shown with a combination of a liquid crystal display panel and a liquid crystal light modulator. Various suitable light modulators can be used in the present disclosure, examples of which include a microlens array. Various suitable display panels can be used in combination with the light modulator. Examples of suitable display panels include organic light emitting diode display panels, quantum dot light emitting diode display panels, mini light emitting diode display panels, and micro light emitting diode display panels.

[0105] The inventors of the present disclosure found that the problems of moire patterns and cross-talk are particularly problematic in three-dimensional displays such as naked-eye three-dimensional display devices. In some embodiments, the display panel according to the present disclosure further comprises a lenticular layer for implementing three-dimensional image display. Examples of the lenticular layer include a lenticular lens grating (e.g. a liquid crystal lenticular lens grating) or a parallax barrier grating (e.g. a liquid crystal parallax barrier grating).

[0106] The inventors of the present disclosure found that micro LED display panels are particularly suitable for implementing three-dimensional image display with significantly reduced moire patterns and cross-talk. However, as mentioned above, the display method according to the present disclosure can be implemented in any suitable display panel.

[0107] The foregoing description of embodiments of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. The description was presented as illustrative of the broadest aspects of the application that are and can be claimed as it is and only limited by the appended claims. Obviously, many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to explain the principles of the application and its best mode of practical application to thereby enable others skilled in the art to understand the application for various embodiments and with various modifications that are suited to the particular use or implementation. The scope of the application is to be defined by the claims and their equivalents, where all terms are meant to be construed in their broadest reasonable sense, unless otherwise indicated. Thus, the terms "the invention," "the present invention," or similar referents used in the context of the detailed description are not intended to be limiting of the claimed subject matter, and will be included in the scope of the claims along with the equivalents thereof. The present invention is only limited by the claims appended hereto and encompasses all variations falling within the scope of the claims, which are to be interpreted in accordance with the principles of patent law. Furthermore, these claims can refer to "a," "an" or "the" article, which is intended to be interpreted to mean "at least one" or "one or more." Also, any application recitations of "first," "second," or "third" or similar language are not intended to be construed as limiting the number or order of elements. Any advantages and benefits provided by the described embodiments can not apply in all instances. It should be understood that various changes can be made by those skilled in the art which would be apparent to one skilled in the art. Such changes are not to be considered limiting of the scope of the application as defined by the appended claims and their equivalents. Furthermore, elements and components of the disclosure can be arranged and designed in a wide variety of different configurations, all of which are intended to fall within the scope of the present disclosure. Also, the elements and components of the disclosure can be interchanged with other elements and components that serve the same function or are otherwise suitable for the purposes contemplated by the disclosure.

Claims

1. A display method comprising: providing a display panel comprising a plurality of sub-pixels, the sub-pixels receiving a same data signal; each of the plurality of sub-pixels comprising a first area, nl second areas, and n2 third areas, the first area being located between the nl second areas and the n2 third areas, nl > 1, and n2 > 1; to display a first image frame in a first mode, the first image frame being an image frame having a relatively higher resolution and more details, controlling each sub-pixel to emit light only in the first area, m1 of the nl second areas, and m2 of the n2 third areas, 0 < ml < nl and 0 < m2 < n2, such that adjacent light beams are spaced apart from each other, forming gaps between adjacent light beams, resulting in Moire fringes; and to display a second image frame in a second mode, the second image frame being an image frame having a relatively lower resolution and less details, controlling each sub-pixel to emit light only in the first area, m1’ of the nl second areas, and m2’ of the n2 third areas, where 0 < ml’ < nl and 0 < m2’ < n2, ml ≠ ml’ and m2 ≠ m2’, and ml < ml’ and m2 < m2’; such that adjacent light beams partially overlap with each other, resulting in cross-talk between sub-pixels.

2. The display method according to claim 1, wherein to display the first image frame in the first mode, each sub-pixel emits light only in the first area, ml = 0, m2 = 0; and where to display the second image frame in the second mode, each sub-pixel emits light in the first area, the nl second areas, and the n2 third areas, ml’ = nl, m2’ = n2.

3. The display method of claim 1, further comprising, to display a third image frame in a third mode, controlling each sub-pixel to emit light only in the first area, ml’’ of the nl second areas, and m2’’ of the n2 third areas, 1 < ml’’ < nl, 1 < m2’’ < n2, ml < ml’’ < ml’ and m2 < m2’’ < m2’.

4. The display method of claim 1, further comprising: determining, by one or more processors, an image resolution of each image frame; determining, by the one or more processors, an adjustment factor related at least in part to the image resolution of each image frame; and controlling values of ml, m2, ml’, and m2’ based on the adjustment factor.

5. The display method of claim 1, further comprising: performing, by one or more processors, a Fourier transform on each image frame to obtain low frequency components and high frequency components; determining, by the one or more processors, an adjustment factor related at least in part to a ratio of the high frequency components and the low frequency components; and controlling values of ml, m2, ml’, and m2’ based on the adjustment factor.

6. The display method according to claim 5, wherein The values of m1, m2, m1' and m2' for image frames with a relatively high ratio of high frequency components to low frequency components are smaller than the values of m1, m2, m1' and m2' for image frames with a relatively low ratio of high frequency components to low frequency components, respectively.

7. The display method of claim 1, further comprising: determining a gaze direction of a user and determining a local region of the display panel that the gaze direction intersects, the local region being smaller than a region of the display panel; determining, by one or more processors, an image sharpness of a portion of each image frame configured to be displayed in the local region; determining, by the one or more processors, an adjustment factor related at least in part to the image sharpness of the portion of each image frame; and controlling values of m1, m2, m1' and m2' for subpixels in the local region based on the adjustment factor.

8. The display method of claim 1, further comprising: determining a gaze direction of a user and determining a local region of the display panel that the gaze direction intersects, the local region being smaller than a region of the display panel; performing, by one or more processors, a Fourier transform on a portion of each image frame configured to be displayed in the local region to obtain low frequency components and high frequency components; determining, by the one or more processors, an adjustment factor related at least in part to a ratio of the high frequency components to the low frequency components of the portion of each image frame; and controlling values of m1, m2, m1' and m2' for subpixels in the local region based on the adjustment factor.

9. The display method of claim 1, further comprising controlling values of m1, m2, m1' and m2' in a plurality of portions of each image frame, respectively, by: determining, by one or more processors, respective image sharpnesses of each portion of the plurality of portions; determining, by the one or more processors, respective adjustment factors related at least in part to the respective image sharpnesses of the respective portions; and controlling values of m1, m2, m1' and m2' for subpixels configured to display the respective portions based on the respective adjustment factors.

10. The display method of claim 1, further comprising controlling values of m1, m2, m1' and m2' in a plurality of portions of each image frame, respectively, by: performing, by one or more processors, a Fourier transform on each portion of the plurality of portions to obtain respective low frequency components and respective high frequency components; determining, by the one or more processors, respective adjustment factors related at least in part to a ratio of the respective high frequency components to the respective low frequency components of the respective portions; and controlling values of m1, m2, m1' and m2' for subpixels configured to display the respective portions based on the respective adjustment factors.

11. The display method according to claim 1, wherein Controlling values of m1, m2, m1' and m2' is performed manually by a user through a switch.

12. A display device, comprising: a display panel comprising a plurality of subpixels, the subpixels receiving a same data signal; Each of the plurality of sub-pixels comprises a first region, n1 second regions and n2 third regions, the first region being located between the n1 second regions and the n2 third regions, n1 ≥ 1 and n2 ≥ 1; and one or more processors configured to: to display a first image frame in a first mode, the first image frame being an image frame with relatively higher definition and more details, control each sub-pixel to emit light only in the first region, m1 of the n1 second regions and m2 of the n2 third regions, 0 ≤ m1 ≤ n1 and 0 ≤ m2 ≤ n2, so that adjacent light beams are spaced apart from each other, forming gaps between adjacent light beams, resulting in Moire fringes; and to display a second image frame in a second mode, the second image frame being an image frame with relatively lower definition and less details, control each sub-pixel to emit light only in the first region, m1’ of the n1 second regions and m2’ of the n2 third regions, where 0 ≤ m1’ ≤ n1 and 0 ≤ m2’ ≤ n2, m1 ≠ m1’ and m2 ≠ m2’; and m1 < m1’ and m2 < m2’; so that adjacent light beams partially overlap with each other, resulting in crosstalk between sub-pixels.

13. The display device of claim 12, wherein, The one or more processors are further configured to: determine image definition of each image frame; determine an adjustment factor at least partially related to the image definition of each image frame; and control values of m1, m2, m1’ and m2’ based on the adjustment factor.

14. The display device of claim 12, wherein, The one or more processors are further configured to: perform Fourier transform on each image frame to obtain low frequency components and high frequency components; determine an adjustment factor at least partially related to a ratio of the high frequency components to the low frequency components; and control values of m1, m2, m1’ and m2’ based on the adjustment factor.

15. The display device of claim 12, wherein, Each sub-pixel comprises a respective pixel driving circuit connected to a first light emitting element configured to emit light in the first region, n1 second light emitting elements configured to emit light in the n1 second regions, and n2 third light emitting elements configured to emit light in the n2 third regions; and Each pixel driving circuit comprises (n1 + n2) switches respectively configured to individually connect or disconnect driving current from the n1 second light emitting elements and the n2 third light emitting elements.

16. The display device of claim 12, further comprising a plurality of light modulation units, each of the plurality of light modulation units being configured to modulate light emission of each sub-pixel; wherein Each light modulation unit comprises n1 second light modulators configured to individually allow or disallow light emission in the n1 second regions A2, and n2 third light modulators configured to individually allow or disallow light emission in the n2 third regions A3.

17. The display device of claim 12, further comprising a camera configured to track a gaze of a user; wherein, the one or more processors are further configured to: determine a gaze direction of the gaze of the user and determine a local area of the display panel that the gaze direction intersects, the local area being smaller than an area of the display panel; determine an image sharpness of a portion of individual image frames configured to be displayed in the local area; determine an adjustment factor related at least in part to the image sharpness of the portion of the individual image frames; and control values of ml, m2, ml’ and m2’ for sub-pixels in the local area based on the adjustment factor.

18. The display device of claim 12, further comprising a camera configured to track a gaze of a user; wherein the one or more processors are further configured to: determine a gaze direction of the gaze of the user and determine a local area of the display panel that the gaze direction intersects, the local area being smaller than an area of the display panel; perform a Fourier transform on a portion of individual image frames configured to be displayed in the local area to obtain low frequency components and high frequency components; determine an adjustment factor related at least in part to a ratio of the high frequency components to the low frequency components of the portion of the individual image frames; and control values of ml, m2, ml’ and m2’ for sub-pixels in the local area based on the adjustment factor.

19. The display device of claim 12, wherein, the one or more processors are further configured to control values of ml, m2, ml’ and m2’ in a plurality of portions of individual image frames respectively by: determining, by one or more processors, respective image sharpnesses of individual ones of the plurality of portions; determining, by the one or more processors, respective adjustment factors related at least in part to the respective image sharpnesses of the individual portions; and controlling values of ml, m2, ml’ and m2’ for sub-pixels configured to display the individual portions based on the respective adjustment factors.

20. The display device of claim 12, wherein, the one or more processors are further configured to control values of ml, m2, ml’ and m2’ in a plurality of portions of individual image frames respectively by: performing, by one or more processors, a Fourier transform on individual ones of the plurality of portions to obtain respective low frequency components and respective high frequency components; determining, by the one or more processors, respective adjustment factors related at least in part to a ratio of the respective high frequency components to the respective low frequency components of the individual portions; and controlling values of ml, m2, ml’ and m2’ for sub-pixels configured to display the individual portions based on the respective adjustment factors.

21. The display device of claim 12, further comprising a switch configured to control values of ml, m2, ml’ and m2’.

Images