Display module and near-eye display device

Abstract

The application discloses a display module and a near-eye display device. The display module comprises a display panel, the display panel comprising a display area and a non-display area; the display area comprising a plurality of light emitting elements, the light emitting elements comprising a first electrode and a second electrode, the non-display area comprising a second electrode signal line, the second electrode signal line being electrically connected with the second electrode; the plurality of light emitting elements comprising a first light emitting element and a second light emitting element, the image height of the first light emitting element being different from that of the second light emitting element, and the second electrode in the first light emitting element being different from the second electrode in the second light emitting element; under the same driving voltage, the display brightness L1 of the first light emitting element and the display brightness L2 of the second light emitting element satisfy |L1-L2| / L2≤20%. By means of the differential design of the second electrode in the first light emitting element and the second electrode in the second light emitting element, the display brightness of the first light emitting element is ensured to be equivalent to the display brightness of the second light emitting element, and the display uniformity of the display module is ensured.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display module and a near-eye display device. Background Technology

[0002] Near-eye display systems, such as virtual reality or augmented reality display systems, can be placed above a user's head and allow the user to observe images on the display. For example, near-eye display systems can provide real-world information to pilots or drivers and allow users to observe the displayed images while observing the real-world scene.

[0003] Near-eye display systems extract light from different positions and viewing angles on the display screen and convert it into a display image on the imaging surface of the optomechanical system. Because the brightness of light varies at different positions and viewing angles on the display screen, the uniformity of the near-eye display image is low. Summary of the Invention

[0004] This invention provides a display module and a near-eye display device to improve the technical problem of poor display uniformity in display modules.

[0005] According to one aspect of the present invention, a display module is provided, including a display panel, the display panel including a display area and a non-display area;

[0006] The display area includes multiple light-emitting elements, each light-emitting element including a first electrode and a second electrode, wherein the second electrode is located on the light-emitting side of the first electrode near the light-emitting side of the display panel;

[0007] The non-display area includes a second electrode signal line, which is electrically connected to the second electrode and is used to transmit display signals to the second electrode.

[0008] The plurality of light-emitting elements include a first light-emitting element and a second light-emitting element, wherein the image height of the first light-emitting element is smaller than the image height of the second light-emitting element, and the second electrode in the first light-emitting element is different from the second electrode in the second light-emitting element;

[0009] Under the same driving voltage, the display brightness of the area set by the first light-emitting element is L1, and the display brightness of the area set by the second light-emitting element is L2, where |L1-L2| / L2≤20%.

[0010] Optionally, the resistivity of the second electrode in the first light-emitting element is different from the resistivity of the second electrode in the second light-emitting element.

[0011] Optionally, the display module further includes an optical magnification unit located on the light-emitting side of the display panel;

[0012] The display brightness of the light emitted from the display panel after passing through the optical magnification unit satisfies the following relationship: y = a * x 3 +b*x 2 + c*x+d; where y represents the display brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants and b≠0;

[0013] Wherein, when b>0, the resistivity of the second electrode in the first light-emitting element is greater than the resistivity of the second electrode in the second light-emitting element;

[0014] When b < 0, the resistivity of the second electrode in the first light-emitting element is less than the resistivity of the second electrode in the second light-emitting element.

[0015] Optionally, when b>0, the resistivity of the second electrode is negatively correlated with the image height;

[0016] When b < 0, the resistivity of the second electrode is positively correlated with the image height.

[0017] Optionally, the thickness of the second electrode in the first light-emitting element is different from the thickness of the second electrode in the second light-emitting element.

[0018] Optionally, the display module further includes an optical magnification unit located on the light-emitting side of the display panel;

[0019] The display brightness of the light emitted from the display panel after passing through the optical magnification unit satisfies the following relationship: y = a * x 3 +b*x 2 +c*x+d; where y represents the display brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants and b≠0;

[0020] Wherein, when b>0, the thickness of the second electrode in the first light-emitting element is less than the thickness of the second electrode in the second light-emitting element;

[0021] When b < 0, the thickness of the second electrode in the first light-emitting element is greater than the thickness of the second electrode in the second light-emitting element.

[0022] Optionally, when b>0, the thickness of the second electrode is positively correlated with the image height;

[0023] When b < 0, the thickness of the second electrode is negatively correlated with the image height.

[0024] Optionally, the second electrode is electrically connected to the second electrode signal line via a via, the via surrounding the display area;

[0025] The display area includes four display sub-areas, the edge extension direction of the display sub-areas is the same as or orthogonal to the edge extension direction of the display area, and the intersection of the four display sub-areas is located at the center of the display area;

[0026] The first light-emitting element and the second light-emitting element are located in the same display sub-area. Along the first direction, the distance between the first light-emitting element and the via is S3, and the distance between the second light-emitting element and the via is S4. The first direction is the direction from the first light-emitting element to the second light-emitting element.

[0027] The voltage drop difference ΔV between the display signal on the second electrode in the first light-emitting element and the second electrode in the second light-emitting element satisfies: ΔV=I*|S3-S4|*(ρ / t);

[0028] Where I represents the current in the second electrode, ρ represents the resistivity of the second electrode, and t represents the thickness of the second electrode.

[0029] Optionally, the display panel further includes a color filter structure located on the light-emitting side of the light-emitting element, the color filter structure including multiple color filter units;

[0030] The plurality of light-emitting elements include a third light-emitting element, and the plurality of color-filtering units include a first color-filtering unit. The light emitted by the third light-emitting element is emitted after being filtered by the first color-filtering unit.

[0031] The display module also includes a substrate, wherein the center of the first color filter unit projected onto the plane of the substrate is offset from the center of the third light-emitting element projected onto the plane of the substrate.

[0032] Optionally, the display panel further includes a color filter structure located on the light-emitting side of the light-emitting element, the color filter structure including multiple color filter units;

[0033] The display module further includes a microlens array, which is located on the side of the color filter structure away from the light-emitting element, and the microlens array includes multiple microlenses;

[0034] The plurality of light-emitting elements include a fourth light-emitting element, the plurality of color-filtering units include a second color-filtering unit, the plurality of microlenses include a first microlens, and the light emitted from the fourth light-emitting element is emitted after being filtered by the second color-filtering unit and modulated by the first microlens in sequence.

[0035] The display module further includes a substrate, wherein the center of the orthographic projection of the second color filter unit onto the plane of the substrate is offset from the center of the orthographic projection of the fourth light-emitting element onto the plane of the substrate, and the center of the orthographic projection of the first microlens onto the plane of the substrate is offset from the center of the orthographic projection of the second color filter unit onto the plane of the substrate.

[0036] According to another aspect of the present invention, the present invention also provides a near-eye display module, including the display module described in the first aspect.

[0037] The display module provided in this embodiment of the invention includes a display panel. The display area of ​​the display panel is provided with multiple light-emitting elements, each including a first electrode and a second electrode. A second electrode signal line is provided in the non-display area of ​​the display panel and is electrically connected to the second electrode for transmitting display signals to the second electrode. In this solution, the second electrodes of light-emitting elements with different image heights are different. That is, by differentiating the design of the second electrodes of light-emitting elements at different image height positions, the display brightness of light-emitting elements at different image height positions is ensured to be the same or similar. For example, for first and second light-emitting elements with different image heights, the display brightness L1 of the first light-emitting element and the display brightness L2 of the second light-emitting element satisfy |L1-L2| / L2≤20%, ensuring good brightness uniformity at different positions of the display panel and guaranteeing the display effect of the display panel and the display module.

[0038] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of a display device in the prior art;

[0041] Figure 2 This is a schematic diagram of an optical-mechanical light collection curve in the prior art;

[0042] Figure 3 for Figure 1 Relative brightness curves of the display device at different locations and viewing angles;

[0043] Figure 4This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention;

[0044] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along section line A-A';

[0045] Figure 6 A schematic diagram of the brightness attenuation versus image height curve of a display module's CRA provided in an embodiment of the present invention;

[0046] Figure 7 A schematic diagram of the brightness attenuation versus image height curve of another display module's CRA provided in an embodiment of the present invention.

[0047] Figure 8 for Figure 4 A schematic diagram of the structure of a second electrode along the cross section line B-B';

[0048] Figure 9 for Figure 4 A schematic diagram of another type of second electrode along the cross section line B-B';

[0049] Figure 10 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0050] Figure 11 for Figure 4 A schematic diagram of a cross-sectional structure along section line C-C';

[0051] Figure 12 for Figure 4 A schematic diagram of a cross-sectional structure along section line C-C';

[0052] Figure 13 This is a schematic diagram of the structure of a near-eye display device provided in an embodiment of the present invention. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] Existing near-eye display devices generally include an optical engine, which can be understood as the optical structure that assists the light emitted from the display panel in entering the user's eye. The near-eye display optical system extracts light from different positions and viewing angles on the display screen and converts it into a display image on the imaging surface of the optical engine system. Because the brightness of light varies at different positions and viewing angles on the display screen, the uniformity of the displayed image in near-eye display devices is low. Specifically, Figure 1 This is a schematic diagram of the structure of a display device in the prior art. Figure 2 This is a schematic diagram of an optical-mechanical light-receiving curve in the prior art, such as... Figure 1 and Figure 2 As shown, the image height of the display device 10' is different at different points, that is, the distance from the center of the display device is different at different points, and the light in different cone angle ranges corresponds to different image heights. In other words, the center angle of the light-receiving cone angle (Chief Ray Angle, CRA) is different with different image heights.

[0056] Furthermore, Figure 3 for Figure 1 The relative brightness curves of the display device at different points and viewing angles are shown below. Figures 1 to 3 As shown, the image height varies at different points. For example, at point (1), the image height is 0 mm; at point (2), it is x1 mm; and at point (3), it is x2 mm, where x2 is greater than x1 and x1 is greater than 0. Furthermore, as the image height gradually increases, the angle between the principal optical axis CRA and the vertical line perpendicular to the center of the display device gradually increases. (Reference) Figure 3As shown, when the brightness at a 0° viewing angle (i.e., where the image height is zero) is normalized to 1, the relative brightness can be understood as the relative value of the brightness at each viewing angle to the brightness at a 0° viewing angle. The relative brightness curve at each viewing angle varies with the position, showing a gradual trend as the position shifts. In general, the display device 10' will exhibit a situation where the brightness in the central area is significantly greater than that in the central area, which is detrimental to achieving a uniform display effect for the display device 10'.

[0057] To address the aforementioned technical problems, this invention provides a display module comprising a display panel, which includes a display area and a non-display area. The display area includes multiple light-emitting elements, each comprising a first electrode and a second electrode, the second electrode being located on the light-emitting side of the first electrode near the display panel. The non-display area includes a second electrode signal line electrically connected to the second electrode for transmitting display signals to the second electrode. The multiple light-emitting elements include a first light-emitting element and a second light-emitting element, wherein the image height of the first light-emitting element is smaller than that of the second light-emitting element, and the second electrode in the first light-emitting element is different from the second electrode in the second light-emitting element. Under the same driving voltage, the display brightness of the area where the first light-emitting element is located is L1, and the display brightness of the area where the second light-emitting element is located is L2, wherein |L1-L2| / L2≤20%. By employing the above technical solution, the differentiated design of the second electrode of the first light-emitting element and the second electrode in the second light-emitting element ensures that the display brightness of the first light-emitting element is comparable to that of the second light-emitting element, thus guaranteeing the display uniformity of the display module.

[0058] Figure 4 This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention. Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along section line A-A', as shown below. Figure 4 and Figure 5 As shown, the display module 10 provided in this embodiment of the invention includes a display panel 100, which includes a display area 100a and a non-display area 100b. The display area 100a includes a plurality of light-emitting elements 200, each of which includes a first electrode 210 and a second electrode 220. The second electrode 220 is located on the side of the first electrode 210 near the light-emitting side of the display panel 100. The non-display area 100b includes a second electrode signal line 300, which is electrically connected to the second electrode 220 and is used to transmit display signals to the second electrode 220.

[0059] The plurality of light-emitting elements 200 include a first light-emitting element 200a and a second light-emitting element 200b. The image height of the first light-emitting element 200a is smaller than that of the second light-emitting element 200b, and the second electrode 220 in the first light-emitting element 200a is different from the second electrode 220 in the second light-emitting element 200b.

[0060] Under the same driving voltage, the display brightness of the area set by the first light-emitting element 200a is L1, and the display brightness of the area set by the second light-emitting element 200b is L2, where |L1-L2| / L2≤20%.

[0061] The display module 10 provided in this embodiment of the invention can be used in electronic display devices such as Virtual Reality (VR), Augmented Reality (AR), or Electronic View Finder (EVF), and this embodiment of the invention does not limit it.

[0062] Specifically, the display module 10 includes a display panel 100. The display area 100a of the display panel 100 is used to realize the display function of the display panel 100, and the non-display area 100b of the display panel 100 is used to set some wiring and driver chips, etc., to ensure the display function of the display panel 100.

[0063] Furthermore, the display area 100a includes multiple light-emitting elements 200, which emit visible light to achieve image display. Different light-emitting elements 13 can emit different colors, thereby enabling color display or color-optimized display. For example, the light-emitting elements 200 may include red, green, and blue light-emitting elements. Further, the light-emitting elements 200 may also include white light-emitting elements, but are not limited thereto. The number and color of the light-emitting elements 200 can be adaptively adjusted according to actual production needs, and this embodiment of the invention does not impose specific limitations on this. For example, the light-emitting elements 200 can be organic light-emitting diodes or inorganic light-emitting diodes, etc., and this embodiment of the invention does not impose specific limitations on this.

[0064] Furthermore, the image height of the light-emitting elements 200 at different positions in the display area 100a varies. Generally, the image height near the center of the display is lower than that near the edge. Specifically, the light-emitting elements 200 include a first light-emitting element 200a and a second light-emitting element 200b, with the image height of the first light-emitting element 200a being smaller than that of the second light-emitting element 200b. Furthermore, the larger the center angle of the light-receiving cone corresponding to the light-emitting element 200 with a higher image height, the greater the corresponding color shift value, resulting in a lower display brightness compared to the light-emitting element 200 with a smaller image height.

[0065] Since the signal of the second electrode 220 in the light-emitting element 200 is provided by the second electrode signal line 300 located in the non-display area 100b, for example, the two can be connected by making electrical connections through holes around the display area 100a. This embodiment of the invention does not specifically limit this. Because there is a voltage drop at the second electrode 220 when the display signal transmitted in the second electrode signal line 300 is transmitted to the second electrode 220, the display signals obtained by the second electrode 220 at different locations will differ. It can be understood that the light-emitting element located at the edge of the display area 100a has a smaller distance from the second electrode signal line 300, resulting in less loss of the display signal on its second electrode 220. Conversely, the light-emitting element 200 located in the center of the display area 100a has a larger distance from the second electrode signal line 300, resulting in greater loss of the display signal on its second electrode 220. In other words, the display signal loss on the second electrode 220 corresponding to a light-emitting element 200 with a larger height is less, while the display signal loss on the second electrode 220 corresponding to a light-emitting element 200 with a smaller height is greater. In this way, the difference in display signal on the second electrode 220 at different image height positions compensates for the difference in display brightness caused by the difference in light-collecting cone angle, ensuring that the display brightness of the light-emitting element 200 at different positions and different image height positions is relatively uniform.

[0066] Furthermore, the second electrodes in the light elements at different positions and image heights can be differentiated. By adjusting the second electrode 220 of the first light-emitting element 200a and the second light-emitting element 200b, the display brightness of different light-emitting elements 200 can be adjusted. For example, under the same driving voltage, the display brightness of the light-emitting elements 200 corresponding to different second electrodes 220 can be ensured to be different, that is, the light-emitting elements 200 at different positions have different brightness display effects. By neutralizing the display differences brought about by the second electrode 220 and the display differences brought about by different image heights, the uniformity of the display panel 100 can be ensured.

[0067] For example, the difference in the second electrode 220 may be a difference in resistivity, or a difference in shape and thickness, etc. The following embodiments will describe the differentiated settings of the second electrode 220 in detail.

[0068] Specifically, based on the difference in image height and combined with the differentiated setting through the second electrode 220, the display brightness of the area set by the first light-emitting element 200a is L1, and the display brightness of the area set by the second light-emitting element 200b is L2. L1 and L2 satisfy |L1-L2| / L2≤20%, that is, the display brightness of the area set by the first light-emitting element 200a and the area set by the second light-emitting element 200b is the same or similar, thereby effectively ensuring the display uniformity of the display panel 100 and ensuring the display effect of the display module 10.

[0069] In summary, the display module provided by the embodiments of the present invention has different second electrodes for light-emitting elements with different image heights. That is, by differentiating the design of the second electrodes of light-emitting elements at different image height positions, the display brightness of light-emitting elements at different image height positions is ensured to be the same or similar. For example, for first light-emitting elements and second light-emitting elements with different image heights, the display brightness L1 of the first light-emitting element and the display brightness L2 of the second light-emitting element satisfy |L1-L2| / L2≤20%, so as to ensure good brightness uniformity at different positions of the display panel and ensure the display effect of the display panel and the display module.

[0070] Optional, continue to refer to Figure 4 and Figure 5 As shown, the resistivity of the second electrode 220 in the first light-emitting element 200a is different from that of the second electrode 220 in the second light-emitting element 200b.

[0071] Specifically, resistivity is a physical quantity used to represent the electrical resistance of a material. The difference between the second electrode 220 of the first light-emitting element 200a and the second electrode 220 of the second light-emitting element 200b can be reflected by their different resistivities. Since the resistivities of the second electrodes 220 of the first light-emitting element 200a and the second light-emitting element 200b are different, and under the same driving voltage, different light-emitting elements 200 in the display panel 100 can produce different display brightness effects based on their second electrodes 220 with different resistivities. This difference in display effect is due to the different voltage drops of the second electrodes 220 with different resistivities, which in turn leads to differences in the brightness produced by the light-emitting elements 200. Furthermore, by combining the display differences caused by the different image heights of the first light-emitting element 200a and the second light-emitting element 200b, the display uniformity of the display panel 100 is comprehensively ensured, thus guaranteeing the display effect of the display module 10.

[0072] Figure 6 This is a schematic diagram of the brightness attenuation versus image height curve of a display module's CRA, provided in an embodiment of the present invention. Figure 7 A schematic diagram of the brightness attenuation versus image height curve of the CRA of another display module provided in an embodiment of the present invention, referencing... Figures 4 to 7As shown, the display module 10 also includes an optical magnification unit (not specifically shown in the figure), which is located on the light-emitting side of the display panel 100; the display brightness of the display light emitted from the display panel 100 after passing through the optical magnification unit satisfies the following correspondence: y=a*x 3 +b*x 2 + c*x+d; where y represents the display brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants and b≠0; where, when b>0, the resistivity of the second electrode 220 in the first light-emitting element 200a is greater than the resistivity of the second electrode 220 in the second light-emitting element 200b; when b<0, the resistivity of the second electrode 220 in the first light-emitting element 200a is less than the resistivity of the second electrode 220 in the second light-emitting element 200b.

[0073] Specifically, the optical magnification unit can be understood as an optical engine. Placed on the light-emitting side of the display panel 100, it assists the light emitted from the display panel 100 in entering the optical structure of the user's eye, thereby facilitating the realization of stereoscopic display. Furthermore, the display brightness of the light emitted from the display panel 100 after passing through the optical magnification unit satisfies the following relationship: y = a * x 3 +b*x 2 +c*x+d; where y represents the brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants, with b≠0. Based on this correspondence, the percentage of brightness attenuation of the CRA corresponding to different image heights can be determined, and thus the approximate difference in display brightness of the display panel 100 based on different image heights can be determined. Further adjustment of the resistivity of the second electrode 220 of different light-emitting elements 200 can ensure that the light-emitting elements 200 corresponding to the second electrode 220 with different resistivity produce different display brightness, which is more in line with the brightness difference of the light-emitting elements 200 with different image heights. Specifically, when the brightness of the light-emitting element 200 is low due to the image height, the brightness of the light-emitting element 200 is ensured to be higher due to the second electrode 200 by adjusting the resistivity of the second electrode 200; when the brightness of the light-emitting element 200 is high due to the image height, the brightness of the light-emitting element 200 is ensured to be lower due to the second electrode 200 by adjusting the resistivity of the second electrode 200. The brightness level is relative to the different light-emitting elements 200, further ensuring the overall display effect of the display panel 100.

[0074] For example, refer to Figure 6 As shown in the figure, examples are given with a = -0.0003, b = 0.0013, c = 0.0042, and d = 0.9996. (Refer to the figure for further details.) Figure 7As shown in the figure, a is 0.0008, b is -0.0166, c is 0.0351 and d is 0.9981 for example. The specific values ​​of a, b, c and d can be adaptively adjusted according to different display panels 100. Figure 6 and Figure 7 The values ​​in the text are for illustrative purposes only. Figure 6 and Figure 7 This reflects two different brightness decay trends of CRA. Based on the different brightness decay trends, the resistivity of the second electrode 220 can be adjusted to ensure that the brightness adjustment based on the second electrode 220 can complement the brightness decay trend of CRA, thus ensuring the overall display has balance.

[0075] Furthermore, the brightness of CRA decreases as the image height increases, but when b > 0, the reference... Figure 6 As shown, the brightness decay trend of the CRA increases with increasing pixel height; that is, while the brightness of the CRA decreases with increasing pixel height, the degree of decay also gradually increases. Furthermore, as the brightness decay of the CRA increases, the brightness of the corresponding display area also gradually weakens. Further, the brightness decay trend of the CRA is as follows... Figure 6 As shown, when the image height of the first light-emitting element 200a is less than that of the second light-emitting element 200b, the resistivity of the second electrode 220 in the first light-emitting element 200a can be adjusted to be greater than that in the second electrode 220 of the second light-emitting element 200b. This ensures that the brightness attenuation trend caused by the voltage drop of the second electrode 220 can be balanced with the brightness attenuation trend of CRA, thus ensuring the overall display effect of the display panel 100. It can be understood that the degree of voltage drop in the display signal strength transmitted to different light-emitting elements 200 also varies. Specifically, when the resistivity of the second electrode 220 of the first light-emitting element 200a is greater than that of the second electrode 220 of the second light-emitting element 200b, the degree of brightness attenuation of the first light-emitting element 200a due to the voltage drop of the second electrode 220 is relatively large. Therefore, compared to the first light-emitting element 200a, the second light-emitting element 200b has a smaller degree of brightness decay due to the voltage drop of the second electrode 220. Combined with the brightness decay degree of CRA, the overall brightness decay trend of the first light-emitting element 200a and the second light-emitting element 200b is similar, thereby ensuring that the display of each area of ​​the display module 10 has a uniformity.

[0076] Furthermore, the brightness of the CRA decreases as the image height increases, but when b < 0, the reference... Figure 7 As shown, although the brightness of the CRA decreases with increasing image height, the rate of decrease gradually weakens. Furthermore, the brightness decay trend of the CRA is as follows... Figure 7As shown, when the image height of the first light-emitting element 200a is less than that of the second light-emitting element 200b, the resistivity of the second electrode 220 in the first light-emitting element 200a can be adjusted to be less than that of the second electrode 220 in the second light-emitting element 200b. This ensures that the brightness attenuation trend caused by the voltage drop of the second electrode 220 can be balanced with the brightness attenuation trend of CRA, thus ensuring the overall display effect of the display panel 100. It can be understood that the degree of voltage drop in the display signal strength transmitted to different light-emitting elements 200 also varies. Specifically, when the resistivity of the second electrode 220 of the first light-emitting element 200a is smaller than that of the second electrode 220 of the second light-emitting element 200b, the degree of brightness attenuation of the first light-emitting element 200a due to the voltage drop of the second electrode 220 is relatively small. Therefore, compared to the first light-emitting element 200a, the second light-emitting element 200b has a greater degree of brightness decay due to the voltage drop of the second electrode 220. Combined with the brightness decay degree of CRA, the overall brightness decay trend of the first light-emitting element 200a and the second light-emitting element 200b is similar, thereby ensuring that the display of each area of ​​the display module 10 has a balance.

[0077] Continue to refer to Figures 4 to 7 As shown, when b>0, the resistivity of the second electrode 220 is negatively correlated with the image height; when b<0, the resistivity of the second electrode 220 is positively correlated with the image height.

[0078] Specifically, the adjustment of the resistivity of the second electrode 220 of the light-emitting element 200 at different positions can be a gradual adjustment state, thereby ensuring that the different voltage drops caused by the change in resistivity of the second electrode 220, and thus the different changes in display brightness, are a gradual process, avoiding abrupt display effects on the display panel 100.

[0079] For example, refer to Figure 6 As shown, when b > 0, the resistivity of the second electrode 220 can decrease with the increase of the image height. Combined with the increase of the brightness decay of CRA with the increase of image height, it ensures that the overall brightness decay trend of the display panel 100 is similar, thereby ensuring that the display of each area of ​​the display module 10 has uniformity.

[0080] For example, refer to Figure 7 As shown, when b < 0, the resistivity of the second electrode 220 can increase with the increase of the image height. Combined with the fact that the brightness decay of CRA decreases with the increase of image height, it ensures that the overall brightness decay trend of the display panel 100 is similar, thereby ensuring that the display of each area of ​​the display module 10 has uniformity.

[0081] Figure 8 for Figure 4 A schematic diagram of the structure of a second electrode along the cross-section line B-B'. Figure 9 for Figure 4 A schematic diagram of another type of second electrode along the cross-section line B-B', see reference. Figure 8 and Figure 9 As shown, the thickness of the second electrode 220 in the first light-emitting element 200a is different from the thickness of the second electrode 220 in the second light-emitting element 200b.

[0082] Specifically, the thickness of the electrode is a physical quantity that reflects the electrode's resistance characteristics. The difference between the second electrode 220 of the first light-emitting element 200a and the second electrode 220 of the second light-emitting element 200b can be reflected by their different electrode thicknesses. By differentiating the thicknesses of the second electrode 220 of the first light-emitting element 200a and the second electrode 220 of the second light-emitting element 200b, under the same driving voltage, the different electrode thicknesses result in different resistance values. Furthermore, under the same driving voltage, different light-emitting elements 200 in the display panel 100 can produce different display brightness effects due to the different voltage drops across the second electrodes 220 with different resistance thicknesses. This difference in display effect is due to the different voltage drops across the second electrodes 220 with different resistance thicknesses, which in turn leads to differences in the brightness produced by the light-emitting elements 200. Combining this with the display differences caused by the different image heights of the first light-emitting element 200a and the second light-emitting element 200b, the display uniformity of the display panel 100 is comprehensively ensured, guaranteeing the display effect of the display module 10.

[0083] For details, please refer to Figure 4 As shown, if the thickness of the second electrode of different light-emitting elements is the same, then... Figure 4 Taking the first light-emitting element 200a as the central light-emitting element as an example, the resistance R (200a) of the second electrode at the first light-emitting element 200a can be expressed as R (200a=ρ*S1 / (2*S)); where ρ is the resistivity of the second electrode, S1 is the dimension of the display area 100a in the direction of the light-emitting element row, and S is the cross-sectional area.

[0084] Since the sheet resistance Rsh of the second electrode can be expressed as Rsh = ρ / t, where t is the thickness of the second electrode, the resistance R(200a) of the second electrode at the first light-emitting element 200a can be further expressed as:

[0085] R(200a)=ρ*S1 / (2*S)=Rsh*S1 / [4*(S1+S2)], where S2 is the size of the display area 100a in the direction of the light-emitting element column.

[0086] Furthermore, more precisely, the resistance R(200a) of the second electrode at the first light-emitting element 200a can be expressed as: 1 / R(200a)=16*(S1+S2) / Rsh*∫{Cosθ / S1+[Cos(π / 2-θ)] / S2}dθ, where the value of θ ranges from 0 to arctan(S2 / S1).

[0087] Considering the different thicknesses of the second electrodes of different second light-emitting elements, at this time for Figure 4 For any light-emitting element between the first light-emitting element 200a (center light-emitting element) and the second light-emitting element 200b (outermost light-emitting element), such as light-emitting element 200p, the resistance R (200p) in its second electrode can be expressed in integral form as:

[0088] R(200p)=∫dI mageheith *(ρ / t)*(S1-2*I mageheith ) / [4*(S1+S2)].

[0089] Among them, I mageheith This is the current corresponding to the image height of the light-emitting element at 200p.

[0090] Continue to refer to Figures 4 to 9 As shown, the display module 10 also includes an optical magnification unit (not specifically shown in the figure), which is located on the light-emitting side of the display panel 100; the display brightness of the display light emitted from the display panel 100 after passing through the optical magnification unit satisfies the following correspondence: y=a*x 3 +b*x 2 +c*x+d; where y represents the display brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants and b≠0; where, when b>0, the thickness of the second electrode 220 in the first light-emitting element 200a is less than the thickness of the second electrode 220 in the second light-emitting element 200b; when b<0, the thickness of the second electrode 220 in the first light-emitting element 200a is greater than the thickness of the second electrode 220 in the second light-emitting element 200b.

[0091] Furthermore, the display brightness of the light emitted from the display panel 100 after passing through the optical magnification unit satisfies the following relationship: y=a*x 3 +b*x 2+c*x+d; where y represents the brightness attenuation ratio relative to the image height of 0, x represents the image height, and a, b, c, and d are all constants, with b≠0. Based on this correspondence, the percentage of brightness attenuation of CRA corresponding to different image heights can be determined, and thus the approximate difference in display brightness of the display panel 100 based on different image heights can be determined. Further adjusting the electrode thickness of the second electrode 220 of different light-emitting elements 200 can ensure that light-emitting elements 200 with different electrode thicknesses produce different display brightness, which is more matched with the brightness difference of light-emitting elements 200 with different image heights. Specifically, when the brightness of light-emitting element 200 is low due to image height, adjusting the electrode thickness of the second electrode 200 ensures that the brightness of light-emitting element 200 is high due to the second electrode 200; when the brightness of light-emitting element 200 is high due to image height, adjusting the electrode thickness of the second electrode 200 ensures that the brightness of light-emitting element 200 is low due to the second electrode 200. The brightness level is relative to the different light-emitting elements 200, further ensuring the overall display effect of the display panel 100.

[0092] For example, refer to Figure 6 As shown in the figure, examples are given where a is -0.0003, b is 0.0013, c is 0.0042, and d is 0.9996. (Refer to the figure for further details.) Figure 7 As shown in the figure, a is 0.0008, b is -0.0166, c is 0.0351 and d is 0.9981 for example. The specific values ​​of a, b, c and d can be adaptively adjusted according to different display panels 100. Figure 6 and Figure 7 The values ​​in the text are for illustrative purposes only. Figure 6 and Figure 7 This reflects two different brightness decay trends of CRA. Based on the different brightness decay trends, the different electrode thicknesses of the second electrode 220 can be adjusted to ensure that the brightness adjustment based on the second electrode 220 can complement the brightness decay trend of CRA, thus ensuring the overall display has balance.

[0093] Furthermore, the brightness of CRA decreases as the image height increases, but when b > 0, the reference... Figure 6 As shown, the brightness decay trend of the CRA increases with increasing pixel height; that is, while the brightness of the CRA decreases with increasing pixel height, the degree of decay also gradually increases. Furthermore, as the brightness decay of the CRA increases, the brightness of the corresponding display area also gradually weakens. Further, the brightness decay trend of the CRA is as follows... Figure 6When the image height of the first light-emitting element 200a is less than the image height of the second light-emitting element 200b, the electrode thickness of the second electrode 220 in the first light-emitting element 200a can be adjusted to be less than the electrode thickness of the second electrode 220 in the second light-emitting element 200b (see reference). Figure 8 As shown, the second electrode 220 of the first light-emitting element 200a is indicated by region aa in the figure, and the second electrode 220 of the second light-emitting element 200b is indicated by region bb in the figure. That is, the electrode thickness of the second electrode 220 in the first light-emitting element 200a is less than the electrode thickness of the second electrode 220 in the second light-emitting element 200b. This ensures that the brightness attenuation trend caused by the voltage drop of the second electrode 220 can be balanced with the brightness attenuation trend of CRA, thus ensuring the overall display effect of the display panel 100. It can be understood that the degree of voltage drop of the display signal strength transmitted to different light-emitting elements 200 also varies. Specifically, when the resistivity of the second electrode 220 of the first light-emitting element 200a is smaller than that of the second electrode 220 of the second light-emitting element 200b, the degree of brightness attenuation caused by the voltage drop of the second electrode 220 in the first light-emitting element 200a is relatively large. Therefore, compared to the first light-emitting element 200a, the second light-emitting element 200b has a smaller degree of brightness decay due to the voltage drop of the second electrode 220. Combined with the brightness decay degree of CRA, the overall brightness decay trend of the first light-emitting element 200a and the second light-emitting element 200b is similar, thereby ensuring that the display of each area of ​​the display module 10 has a uniformity.

[0094] Furthermore, the brightness of the CRA decreases as the image height increases, but when b < 0, the reference... Figure 7 As shown, although the brightness of the CRA decreases with increasing image height, the rate of decrease gradually weakens. Furthermore, the brightness decay trend of the CRA is as follows... Figure 7 When the image height of the first light-emitting element 200a is less than the image height of the second light-emitting element 200b, the electrode thickness of the second electrode 220 in the first light-emitting element 200a can be adjusted to be greater than the electrode thickness of the second electrode 220 in the second light-emitting element 200b (see reference). Figure 9As shown, the second electrode 220 of the first light-emitting element 200a is indicated by region aa in the figure, and the second electrode 220 of the second light-emitting element 200b is indicated by region bb in the figure. That is, the electrode thickness of the second electrode 220 in the first light-emitting element 200a is greater than that in the second light-emitting element 200b. This ensures that the brightness attenuation trend caused by the voltage drop of the second electrode 220 can be balanced with the brightness attenuation trend of CRA, thus ensuring the overall display effect of the display panel 100. It can be understood that the degree of voltage drop of the display signal strength transmitted to different light-emitting elements 200 also varies. Specifically, when the electrode thickness of the second electrode 220 of the first light-emitting element 200a is greater than that of the second electrode 220 of the second light-emitting element 200b, the degree of brightness attenuation caused by the voltage drop of the second electrode 220 in the first light-emitting element 200a is relatively small. Therefore, compared to the first light-emitting element 200a, the second light-emitting element 200b has a greater degree of brightness decay due to the voltage drop of the second electrode 220. Combined with the brightness decay degree of CRA, the overall brightness decay trend of the first light-emitting element 200a and the second light-emitting element 200b is similar, thereby ensuring that the display of each area of ​​the display module 10 has a balance.

[0095] Continue to refer to Figures 4 to 9 As shown, when b>0, the thickness of the second electrode 220 is positively correlated with the image height; when b<0, the thickness of the second electrode 220 is negatively correlated with the image height.

[0096] Specifically, the adjustment of the electrode thickness of the second electrode 220 of the light-emitting element 200 at different positions can be a gradual adjustment state, thereby ensuring that the different voltage drops caused by the change in electrode thickness of the second electrode 220, and thus the different changes in display brightness, are a gradual process, avoiding abrupt display effects on the display panel 100, and also ensuring the uniformity of electrode preparation.

[0097] For example, refer to Figure 6 and Figure 8 As shown, when b > 0, the electrode thickness of the second electrode 220 can increase with the increase of the image height. Combined with the increase of the brightness decay of CRA with the increase of image height, it ensures that the overall brightness decay trend of the display panel 100 is similar, thereby ensuring that the display of each area of ​​the display module 10 has uniformity.

[0098] For example, refer to Figure 7 and Figure 9 As shown, when b < 0, the electrode thickness of the second electrode 220 can be reduced as the image height increases. Combined with the fact that the brightness decay of CRA decreases as the image height increases, the overall brightness decay trend of the display panel 100 is similar, thereby ensuring that the display of each area of ​​the display module 10 has uniformity.

[0099] Figure 10 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, with reference to... Figure 4 , Figure 5 and Figure 10 As shown, the second electrode 220 and the second electrode signal line 300 are electrically connected through a via (not fully shown in the figure), and the via surrounds the display area 100a; the display area 100a includes four display sub-areas 100a1, the edge extension direction of the display sub-areas 100a1 is the same as or orthogonal to the edge extension direction of the display area 100a, and the intersection of the four display sub-areas 100a1 is located at the center o of the display area 100a; the first light-emitting element 200a and the second light-emitting element 200b are located in the same display sub-area 100a1, along the first direction M, ... The distance between vias d is S3, the distance between the second light-emitting element 200b and via d is S4, and the first direction M is the direction from the first light-emitting element 200a to the second light-emitting element 200b. The voltage drop difference ΔV between the display signal on the second electrode 220 in the first light-emitting element 200a and the second electrode 220 in the second light-emitting element 200b satisfies: ΔV=I*|S3-S4|*(ρ / t); where I represents the current in the second electrode 220, ρ represents the resistivity of the second electrode 220, and t represents the thickness of the second electrode 220.

[0100] For details, please refer to Figure 5 and Figure 10 As shown, the first electrode 210 in the light-emitting element 200 is electrically connected to the source or drain of the driving unit 410 through a via, and the second electrode 220 in the light-emitting element 200 is electrically connected to the second electrode signal line 300 through a via. The vias connecting the second electrode 220 and the second electrode signal line 300 are arranged around the display area 100a. It should be noted that... Figure 10 Not all vias connecting the second electrode 220 and the second electrode signal line 300 are shown; only... Figure 10 The diagram shows a via d.

[0101] Further reference Figure 10 As shown, the display area 100a includes multiple display sub-areas 100a1, and the edge extension direction of the display sub-areas 100a1 is the same as or perpendicular to the edge extension direction of the display area 100a. That is, the multiple display sub-areas 100a1 are a regular division of the display area 100a. It should be noted that the display sub-areas 100a1 are not a division in the actual sense. In this embodiment of the invention, the division of the display sub-areas 100a1 is used to reflect the differences in the display signals obtained by different second electrodes 220 in the display sub-areas 100a1.

[0102] Specifically, the intersection of the four display sub-regions 100a1 is located at the center o of the display region 100a. Taking the light-emitting element 200 in one display sub-region 100a1 as an example. Figure 10 The same display sub-area 100a1 includes a first light-emitting element 200a and a second light-emitting element 200b. It should be noted that... Figure 4 The image also shows a first light-emitting element 200a and a second light-emitting element 200b, wherein the image heights of the first light-emitting element 200a and the second light-emitting element 200b differ, that is, it can be... Figure 4 The location shown can also be Figure 10 The location shown.

[0103] Further reference Figure 10 As shown, the first light-emitting element 200a and the second light-emitting element 200b are located in the same display sub-region 100a1, and along the first reverse direction M, the first light-emitting element 200a points towards the second light-emitting element 200b. The distance between the first light-emitting element 200a and the via d is S3, and the distance between the second light-emitting element 200b and the via d is S4. The display signal acquired by the second electrode 220 in the first light-emitting element 200a can be transmitted through the via d, and the display signal acquired by the second electrode 220 in the second light-emitting element 200b can also be transmitted through the via d. Because there is a certain positional difference between the first light-emitting element 200a and the second light-emitting element 200b, it can be understood that there is a difference in the image height corresponding to the first light-emitting element 200a and the second light-emitting element 200b. Therefore, the corresponding second electrode 220 will experience different degrees of voltage drop due to the difference in distance from the via d. Specifically, the voltage drop difference ΔV between the second electrode 220 of the first light-emitting element 200a and the second electrode 220 of the second light-emitting element 200b satisfies: ΔV = I * |S3 - S4| * (ρ / t); where I represents the current in the second electrode 220, ρ represents the resistivity of the second electrode 220, and t represents the thickness of the second electrode 220. This demonstrates that the voltage drop of different second electrodes 220 is related to their resistivity and thickness, so a suitable voltage drop can be selected by adjusting the resistivity and thickness of the second electrode 220. Furthermore, by selecting a suitable voltage drop, the required difference in display brightness of the light-emitting elements 200 at different image heights is ensured, and combined with the brightness decay trend of CRA, the overall display of the display module 10 is guaranteed to be uniform.

[0104] Figure 11 for Figure 4A cross-sectional structural diagram along section line C-C' is shown in Figure 14. The display panel 100 also includes a color filter structure 500 located on the light-emitting side of the light-emitting element 200. The color filter structure 500 includes multiple color filter units 510. The multiple light-emitting elements 200 include a third light-emitting element 200c. The multiple color filter units 510 include a first color filter unit 510a. The emitted light from the third light-emitting element 200c is emitted after being filtered by the first color filter unit 510. The display module 10 also includes a substrate 401. The center of the orthographic projection of the first color filter unit 510 onto the plane of the substrate 401 is offset from the center of the orthographic projection of the third light-emitting element 200c onto the plane of the substrate 401.

[0105] The display panel 100 provided in this embodiment of the invention may further include a color filter structure 500, such as... Figure 11 As shown, the display panel 100 includes multiple light-emitting elements 200 on one side of the substrate 401, and a color filter structure 500 is provided on the side of the light-emitting elements 200 away from the substrate 401. The color filter structure 500 can improve the color purity of the emitted light, thereby improving the display effect of the display module 10. Specifically, the multiple light-emitting elements 200 include a third light-emitting element 200c, the color filter structure 500 includes a color filter unit 510, and the color filter unit 510 includes a first color filter unit 510a. The projections of the third light-emitting element 200c and the first color filter unit 510a onto the plane of the substrate 401 overlap.

[0106] Furthermore, the center of the orthographic projection of the first color filter unit 510a onto the plane of the substrate 401 is offset from the center of the orthographic projection of the third light-emitting element 200c onto the plane of the substrate 401, as shown in the reference. Figure 11 The degree of misalignment between the third light-emitting element 200c at different positions and the first color filter unit 510a on the plane of the substrate 401 varies. That is, the image height corresponding to the third light-emitting element 200c at different positions differs. Furthermore, to ensure the CRA angle corresponding to the principal optical axis at different image height points, the first color filter unit 510a is shifted towards the edge of the display module 10, i.e., tilted towards the direction of a wide viewing angle. This adjusts the light output brightness of the display module 10 at wide viewing angles, meeting the user's brightness requirements for wide viewing angles and improving the user experience. However, adjusting the first color filter unit 510a results in brightness differences; the brightness is lower near the edge and higher near the center, meaning that areas with larger image heights have lower brightness, and areas with smaller image heights have higher brightness. Further, by adjusting the electrodes of the light-emitting elements 200 at different image heights, the display module 10 ensures the brightness requirements for wide viewing angles while also maintaining the display uniformity of the display panel 100, thus improving the display effect of the display module 10.

[0107] It should be noted that the display module 10 provided in this embodiment of the invention may also include other film layers located between the third light-emitting element 200c and the first color filter unit 510, which are not shown in the figure. Furthermore, the third light-emitting element 200c provided in this embodiment of the invention may include various different light-emitting elements, such as organic light-emitting diodes, micro light-emitting diodes, or other light-emitting elements; this embodiment of the invention does not limit the specific light-emitting elements used.

[0108] Figure 12 for Figure 4 A schematic diagram of a cross-sectional structure along section line C-C', for reference. Figure 12 As shown, the display panel 100 also includes a color filter structure 500 located on the light-emitting side of the light-emitting element 200, the color filter structure 500 including a plurality of color filter units 510; the display module 10 also includes a microlens array 600, the microlens array 600 located on the side of the color filter structure 500 away from the light-emitting element 200, the microlens array 600 including a plurality of microlenses 610; the plurality of light-emitting elements 200 includes a fourth light-emitting element 200d, the plurality of color filter units 510 includes a second color filter unit 510b, and the plurality of microlenses 610 includes a first microlens 610a, the second... The emitted light from the four light-emitting elements 200d is filtered by the second color filter unit 510b and modulated by the first microlens 610a before being emitted. The display module 10 also includes a substrate 401, wherein the center of the orthographic projection of the second color filter unit 510b onto the plane of the substrate 401 is offset from the center of the orthographic projection of the fourth light-emitting element 200d onto the plane of the substrate 401, and the center of the orthographic projection of the first microlens 610a onto the plane of the substrate 401 is offset from the center of the orthographic projection of the second color filter unit 510b onto the plane of the substrate 401.

[0109] For example, the display module 10 provided in this embodiment of the invention may further include a color filter structure 500 and a microlens array 600. The color filter structure 500 includes color filter units 510, which can improve the color purity of the light emitted by the light-emitting element 200, thereby improving the display effect of the display module 10. The microlens array 600 includes multiple microlenses 610, which facilitate the realization of three-dimensional display of the light emitted by the light-emitting element 200, thus also ensuring the display effect of the display module 10.

[0110] Specifically, the plurality of light-emitting elements 200 includes a fourth light-emitting element 200d, the plurality of color filter units 510 includes a second color filter unit 510b, and the plurality of microlenses 610 includes a first microlens 610a, wherein the first microlens 610a is located on the side of the second color filter unit 510b away from the fourth light-emitting element 200d. Further, the center of the orthographic projection of the second color filter unit 510b onto the plane of the substrate 401 is offset from the center of the orthographic projection of the fourth light-emitting element 200d onto the plane of the substrate 401, and the center of the orthographic projection of the first microlens 610a onto the plane of the substrate 401 is offset from the center of the orthographic projection of the second color filter unit 510b onto the plane of the substrate 401. (Refer to...) Figure 12 The degree of misalignment between the orthographic projections of the fourth light-emitting element 200d and the second color filter unit 510b on the plane of the substrate 401 varies at different positions. Furthermore, the orthographic projection of the second color filter unit 510b on the plane of the substrate 401 also differs from the orthographic projection of the first microlens 610a on the plane of the substrate 401. That is, the image height corresponding to the fourth light-emitting element 200c at different positions differs. To ensure the CRA angle corresponding to the principal optical axis at different image height points, the second color filter unit 510b and the first microlens 610a are shifted towards the edge of the display module 10, i.e., tilted towards the direction of a large viewing angle. This adjusts the light output brightness of the display module 10 at a large viewing angle, meeting the user's brightness requirements for viewing at a large angle and improving the user experience. However, the adjustment of the second color filter unit 510b and the first microlens 610a results in brightness differences; the brightness is lower near the edge and higher near the center, meaning that areas with larger image heights have lower brightness, and areas with smaller image heights have higher brightness. Furthermore, by adjusting the electrodes of the light-emitting elements 200 with different pixel heights, the display module 10 can ensure the brightness requirements of a wide viewing angle while also ensuring the display uniformity of the display panel 100, thereby improving the display effect of the display module 10.

[0111] It should be noted that the display module 10 provided in the embodiments of the present invention may also include other film layers located between the third light-emitting element 200c and the second color filter unit 510b, and other film layers between the second color filter unit 510b and the first microlens 610a, which are not shown in the figure, and the embodiments of the present invention do not limit this.

[0112] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 13 This is a schematic diagram of the structure of a near-eye display device provided in an embodiment of the present invention. Figure 13As shown, the near-eye display device 1 can be an augmented reality (AR) display device, a virtual reality (VR) display device, an electronic view finder (EVF), a mobile phone, a computer, or a television, etc. The embodiments of the present invention do not limit this.

[0113] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display module, characterized by The display panel comprises a display area and a non-display area; The display area comprises a plurality of light emitting elements, the light emitting elements comprising a first electrode and a second electrode, the second electrode being located on the side of the first electrode close to the light exit side of the display panel; The non-display area comprises a second electrode signal line, the second electrode signal line being electrically connected with the second electrode and used for transmitting a display signal to the second electrode; The plurality of light emitting elements comprises first light emitting elements and second light emitting elements, the image height of the first light emitting elements being smaller than the image height of the second light emitting elements; The resistivity and / or thickness of the second electrode are set such that, under the same driving voltage, the display brightness of the first light emitting element setting area is L1 and the display brightness of the second light emitting element setting area is L2, wherein |L1-L2| / L2≤20%.

2. The display module of claim 1, wherein, The resistivity of the second electrode in the first light emitting element is different from the resistivity of the second electrode in the second light emitting element.

3. The display module of claim 2, wherein, The display module further comprises an optical amplification unit, the optical amplification unit being located on the light exit side of the display panel; The display brightness of display light rays emitted by the display panel after passing through the optical amplification unit decreases with an increase in the image height, and the display brightness satisfies a corresponding relationship: y = a*x 3 +b*x 2 +c*x+d; wherein y represents a display brightness decay ratio relative to the display brightness at the image height of 0, x represents the image height, a, b, c, and d are all constants and b≠0. When b>0, the resistivity of the second electrode in the first light emitting element is greater than the resistivity of the second electrode in the second light emitting element. When b<0, the resistivity of the second electrode in the first light emitting element is less than the resistivity of the second electrode in the second light emitting element.

4. The display module of claim 3, wherein, When b>0, the resistivity of the second electrode is negatively correlated with the image height. When b<0, the resistivity of the second electrode is positively correlated with the image height.

5. The display module of claim 1, wherein, The thickness of the second electrode in the first light emitting element is different from the thickness of the second electrode in the second light emitting element.

6. The display module of claim 5, wherein, The display module further comprises an optical amplification unit, the optical amplification unit being located on the light exit side of the display panel; The display brightness of display light rays emitted by the display panel after passing through the optical amplification unit decreases with an increase in the image height, and the display brightness satisfies a corresponding relationship: y = a*x 3 +b*x 2 +c*x+d; wherein y represents a display brightness decay ratio relative to the display brightness at an image height of 0, x represents the image height, a, b, c, and d are all constants and b≠0. When b>0, the thickness of the second electrode in the first light emitting element is less than the thickness of the second electrode in the second light emitting element. When b<0, the thickness of the second electrode in the first light emitting element is greater than the thickness of the second electrode in the second light emitting element.

7. The display module of claim 6, wherein, When b>0, the thickness of the second electrode is positively correlated with the image height. When b<0, the thickness of the second electrode is negatively correlated with the image height.

8. The display module of claim 1, wherein, The second electrode is electrically connected with the second electrode signal line through a via hole, the via hole surrounding the display area; The display area comprises four display sub-areas, the edge extension direction of the display sub-areas being the same as or orthogonal to the edge extension direction of the display area, and the intersection of the four display sub-areas being located at the center of the display area; The first light emitting elements and the second light emitting elements are located in the same display sub-area, along a first direction, the distance between the first light emitting elements and the via hole being S3, the distance between the second light emitting elements and the via hole being S4, the first direction being the direction in which the first light emitting elements point to the second light emitting elements; A difference ΔV of voltage drops of the display signal on the second electrode in the first light emitting element and on the second electrode in the second light emitting element satisfies: ΔV = I * |S3-S4| * (ρ / t); wherein I represents a current in the second electrode, ρ represents a resistivity of the second electrode, and t represents a thickness of the second electrode.

9. The display module of claim 1, wherein, The display panel further comprises a color filter structure on a light emitting side of the light emitting element, the color filter structure comprising a plurality of color filter units; The plurality of light emitting elements comprises a third light emitting element, and the plurality of color filter units comprises a first color filter unit, the third light emitting element emitting light rays which are filtered by the first color filter unit. The display module further comprises a substrate, and a center of an upper orthographic projection of the first color filter unit on a plane where the substrate is located is arranged to be staggered with a center of an upper orthographic projection of the third light emitting element on the plane where the substrate is located.

10. The display module of claim 1, wherein, The display panel further comprises a color filter structure on a light emitting side of the light emitting element, the color filter structure comprising a plurality of color filter units; The display module further comprises a microlens array, the microlens array being located on a side of the color filter structure away from the light emitting element, and the microlens array comprising a plurality of microlenses; The plurality of light emitting elements comprises a fourth light emitting element, the plurality of color filter units comprises a second color filter unit, and the plurality of microlenses comprises a first microlens, the fourth light emitting element emitting light rays which are filtered by the second color filter unit and modulated by the first microlens in sequence. The display module further comprises a substrate, and a center of an upper orthographic projection of the second color filter unit on a plane where the substrate is located is arranged to be staggered with a center of an upper orthographic projection of the fourth light emitting element on the plane where the substrate is located, and a center of an upper orthographic projection of the first microlens on the plane where the substrate is located is arranged to be staggered with a center of an upper orthographic projection of the second color filter unit on the plane where the substrate is located.

11. A near-eye display device, comprising: The display module comprises the display module of any one of claims 1-10.

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