Display module and field of view display device for use in a vehicle

Abstract

The application discloses a display module and a field-of-view display device used in a vehicle. The display module comprises a light-emitting functional layer, a first light-adjusting unit and a second light-adjusting unit. The light-emitting functional layer comprises a substrate, a first light-emitting unit and a second light-emitting unit. The light-emitting functional layer comprises a central display area and edge display areas located on the left and right sides of the central display area. The first light-adjusting unit corresponds to the first light-emitting unit, and the second light-adjusting unit corresponds to the second light-emitting unit. In the plane where the light-emitting functional layer is located, the light-emitting functional layer has a center line perpendicular to the first direction. The main optical axis of the first light-emitting unit coincides with the light-adjusting main optical axis obtained after the main optical axis of the first light-emitting unit passes through the first light-adjusting unit. The light-adjusting main optical axis obtained after the main optical axis of the second light-emitting unit passes through the second light-adjusting unit is arranged close to the center line relative to the main optical axis of the second light-emitting unit.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and a field-of-view display device for use in vehicles. Background Technology

[0002] A head-up display (HUD) was originally used in aircraft as a flight aid. Currently, HUDs are widely used in automobiles. Their principle is that the image on the display screen is reflected by one or two mirrors and projected onto the car's windshield, forming a bright virtual image in front of the viewer.

[0003] Due to the distance between the human eye and the virtual image, as well as the size of the display screen, the larger the viewing angle, the lower the brightness of the edge areas of the displayed image as perceived by the human eye. In other words, the central area of ​​the displayed image appears brighter to the human eye, while the brightness gradually decreases at the edges. Therefore, improving the brightness uniformity of the displayed image as perceived by the human eye is a problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a display module and a field-of-view display device for use in a vehicle, which can improve the brightness uniformity of the displayed image seen by the human eye.

[0005] On one hand, embodiments of this application provide a display module, which includes: a light-emitting functional layer and a plurality of dimming units. The light-emitting functional layer includes a substrate and a plurality of light-emitting units, the plurality of light-emitting units being disposed on the substrate and arranged in an array. The light-emitting functional layer includes a central display area and two edge display areas, and the light-emitting functional layer is arranged sequentially in a first direction in the order of the edge display areas, the central display area, and the edge display areas. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, the first light-emitting unit being located in the central display area and the second light-emitting unit being located in the edge display areas. The light unit is disposed on one side of the light-emitting surface of the light-emitting functional layer, and includes a first dimming unit and a second dimming unit. The first dimming unit corresponds to the first light-emitting unit, and the second dimming unit corresponds to the second light-emitting unit. In the plane where the light-emitting functional layer is located, the light-emitting functional layer has a center line perpendicular to the first direction. The dimming main optical axis obtained after the main optical axis of the first light-emitting unit passes through the first dimming unit coincides with the main optical axis of the first light-emitting unit. The dimming main optical axis obtained after the main optical axis of the second light-emitting unit passes through the second dimming unit is positioned close to the center line relative to the main optical axis of the second light-emitting unit.

[0006] Optionally, in some embodiments of this application, the first dimming unit includes a first lens, the second dimming unit includes a second lens, the first lens and the second lens have the same structure, the plurality of light-emitting units include a first light-emitting unit group and a second light-emitting unit group, the first light-emitting unit group includes a plurality of first light-emitting units spaced apart along a second direction, the second light-emitting unit group includes a plurality of second light-emitting units spaced apart along the second direction, and the edge display area includes a plurality of second light-emitting unit groups arranged sequentially along the first direction; both the first direction and the second direction are located on the plane where the light-emitting functional layer is located, and the second direction is perpendicular to the first direction;

[0007] Wherein, the offset distance w between the center of the second lens and the principal optical axis of the second light-emitting unit in the first direction and the center line is relatively close to the center line, and the offset distance w between the principal optical axis of multiple second light-emitting units in the same group of second light-emitting units and the center of the corresponding second lens is equal.

[0008] Optionally, in some embodiments of this application, in the first direction, any two groups of second light-emitting units are included, wherein the offset distance w of the second light-emitting units in the second light-emitting unit group farther away from the central display area is greater than the offset distance w of the second light-emitting units in the other group of second light-emitting units closer to the central display area.

[0009] Optionally, in some embodiments of this application, the offset spacing w in the kth group of the second light-emitting units arranged in a direction away from the central display area is obtained according to the following formula:

[0010] w = a / (m / 2)*(k-1),

[0011] Where, a represents the dimming main optical axis obtained after the main optical axis of the second light-emitting unit in the second light-emitting unit group farthest from the central display area passes through the second dimming unit, the orthogonal projection of the main optical axis of the second light-emitting unit on the substrate, and the target spacing away from the center line in the first direction, m represents the total number of light-emitting units spaced apart in the light-emitting functional layer along the first direction, and k represents the kth second light-emitting unit group arranged in the direction away from the central display area.

[0012] Optionally, in some embodiments of this application, the two edge display areas are respectively a first display area and a second display area, and the central display area is located between the first display area and the second display area. The second light-emitting unit located in the first display area and the second light-emitting unit located in the second display area are symmetrical about the central line mirror. The distribution of the offset angle of the dimming principal optical axis emitted by the second lens located on both sides of the central line about the principal optical axis of its corresponding second light-emitting unit is mirror symmetrical about the central line.

[0013] Optionally, in some embodiments of this application, both the first display area and the second display area include a plurality of sub-display areas arranged at intervals along the first direction. Each of the plurality of sub-display areas is provided with N groups of the second light-emitting units. The offset spacing w of the plurality of second light-emitting units located in the same sub-display area is equal, and N is a positive integer greater than or equal to 2. Furthermore, in the first direction, the offset spacing w of the second light-emitting units in the sub-display areas that are farther away from the central display area is larger.

[0014] Optionally, in some embodiments of this application, when N is an odd number, the offset spacing w of the plurality of second light-emitting units in the same sub-display area is equal to the offset spacing w of the second light-emitting units in the second light-emitting unit group located at the center of the sub-display area; when N is an even number, the offset spacing w of the plurality of second light-emitting units in the same sub-display area is equal to the average of the offset spacing w of the second light-emitting units in the N second light-emitting unit groups located in the sub-display area.

[0015] Optionally, in some embodiments of this application, the number of the second light-emitting unit groups provided in the sub-display areas farther away from the central display area is greater.

[0016] Optionally, in some embodiments of this application, the first light-emitting unit group corresponds to at least one first lens, and the second light-emitting unit group corresponds to at least one second lens.

[0017] Optionally, in some embodiments of this application, the orthogonal projection of the first lens on the substrate covers the orthogonal projection of a plurality of first light-emitting units in the first light-emitting unit group on the substrate, and the orthogonal projection of the second lens on the substrate covers the orthogonal projection of a plurality of second light-emitting units in the second light-emitting unit group on the substrate.

[0018] Optionally, in some embodiments of this application, the first lens includes a first sub-lens and a second sub-lens, wherein the orthographic projection of the first sub-lens on the substrate covers the orthographic projections of at least two of the first light-emitting units in the first light-emitting unit group on the substrate, and the orthographic projection of the second sub-lens on the substrate covers the orthographic projection of one of the first light-emitting units in the first light-emitting unit group on the substrate; and / or, the second lens includes a third sub-lens and a fourth sub-lens, wherein the orthographic projection of the third sub-lens on the substrate covers the orthographic projections of at least two of the second light-emitting units in the second light-emitting unit group on the substrate, and the orthographic projection of the fourth sub-lens on the substrate covers the orthographic projection of one of the second light-emitting units in the second light-emitting unit group on the substrate.

[0019] Optionally, in some embodiments of this application, the shape of the lens includes at least one of cylindrical, frustum-shaped, conical, and trapezoidal.

[0020] Optionally, in some embodiments of this application, the first dimming unit includes a first lens, and the second dimming unit includes a second lens. The vector vertices of the first lens and the second lens have different positions. The orthographic projection of the vector vertex of the first lens on the substrate coincides with the orthographic projection of the principal optical axis of the first light-emitting unit on the substrate. The orthographic projection of the vector vertex of the second lens on the substrate is located on the side of the orthographic projection of the principal optical axis of the second light-emitting unit on the substrate that is closer to the center line.

[0021] On the other hand, this application also provides a field-of-view display device for use in a vehicle, the field-of-view display device including the display module described above.

[0022] In the display module and field-of-view display device for vehicles provided in this application, the dimming main optical axis obtained by passing the main optical axis of the first light-emitting unit through the first dimming unit is aligned with the orthogonal projection of the main optical axis of the first light-emitting unit onto the substrate. The dimming main optical axis obtained by passing the main optical axis of the second light-emitting unit through the second dimming unit is positioned close to the center line relative to the orthogonal projection of the main optical axis of the second dimming unit onto the substrate. This results in a brightness of approximately 65% ​​of that of the light-emitting functional layer at a viewing angle of 10°, compared to the light-emitting functional layer without a dimming unit, within a narrow viewing angle. The brightness uniformity of the light-emitting functional layer is greatly improved after the dimming unit is installed. The overall brightness is also improved, making the display brightness of the edge display area greater than or equal to 90% of the display brightness of the center display area within a narrow viewing angle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the display module provided in the first embodiment of this application;

[0024] Figure 2a This is a schematic diagram of the imaging principle of a display module in the prior art;

[0025] Figure 2b This is a schematic diagram of the imaging principle of the display module provided in an embodiment of this application;

[0026] Figure 3a This is a schematic diagram illustrating the brightness of the displayed image as seen by the human eye in a display module in the prior art;

[0027] Figure 3b This is a schematic diagram of the brightness of the displayed image as seen by the human eye in the display module provided in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the display module provided in the second embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the first structure of the display module provided in the third embodiment of this application;

[0030] Figure 6 This is a schematic diagram of a second structure of the display module provided in the third embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the first structure of the display module provided in the fourth embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the second structure of the display module provided in the fourth embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the structure of the display module provided in the fifth embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the structure of the display module provided in the sixth embodiment of this application;

[0035] Figure 11 This is a schematic diagram of the structure of the display module provided in the seventh embodiment of this application. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0037] The various embodiments provided in this application are similar, and the features in different embodiments are combined with each other.

[0038] like Figure 1As shown, an embodiment of this application provides a display module 100, which includes a light-emitting functional layer 10 and a plurality of dimming units 20. The light-emitting functional layer 10 includes a substrate 11 and a plurality of light-emitting units 12. The plurality of light-emitting units 12 are disposed on the substrate 11 and arranged in an array. The light-emitting functional layer 10 includes a central display area A1 and two edge display areas A2. The light-emitting functional layer 10 is arranged sequentially in the first direction X in the order of edge display areas A2, central display area A1, and edge display areas A2. The plurality of light-emitting units 12 include a first light-emitting unit 121 and a second light-emitting unit 122. The first light-emitting unit 121 is located in the central display area A1, and the second light-emitting unit 122 is located in the edge display area A2. The plurality of dimming units 20 are disposed on the light-emitting surface of the light-emitting functional layer 10. The plurality of dimming units 20 include a first dimming unit 21 and a second dimming unit 22. The first dimming unit 21 corresponds to the first light-emitting unit 121, and the second dimming unit 22 corresponds to the second light-emitting unit 122. In this design, on the horizontal plane where the light-emitting functional layer 10 is located, the light-emitting functional layer 10 has a center line L1 perpendicular to the first direction X. The dimming main optical axis obtained after the main optical axis of the first light-emitting unit 121 passes through the first dimming unit 21 coincides with the main optical axis of the first light-emitting unit 121. The dimming main optical axis obtained after the main optical axis of the second light-emitting unit 122 passes through the second dimming unit 22 is positioned close to the center line relative to the main optical axis of the second light-emitting unit 122.

[0039] In the display module provided in this application, the dimming main optical axis obtained after the main optical axis of the first light-emitting unit 121 passes through the first dimming unit 21 coincides with the main optical axis of the first light-emitting unit 121. The dimming main optical axis obtained after the main optical axis of the second light-emitting unit 122 passes through the second dimming unit 22 is set close to the center line relative to the main optical axis of the second light-emitting unit 122. This makes the brightness of the light-emitting functional layer at a viewing angle of 10° approximately 65% ​​of that at 0°, relative to the light-emitting functional layer without dimming units, within a narrow viewing angle range. The brightness uniformity of the light-emitting functional layer is greatly improved after dimming units are set. The overall brightness is also improved, making the display brightness of the edge display area greater than or equal to 90% of the display brightness of the center display area within a narrow viewing angle range.

[0040] In the embodiments of this application, the display module is a HUD display module applied to automobiles, also known as a head-up display module. A head-up display (HUD) is a device that projects instrument information (such as speed) and navigation information into the driver's field of vision. The driver can see the instrument and navigation information in front of their field of vision without having to look down to look at the instrument panel or central control display screen below the steering wheel, thereby improving braking reaction time in emergency situations and enhancing driving safety.

[0041] In the embodiments of this application, the first dimming unit 21 includes a first lens 21, and the second dimming unit 22 includes a second lens 22. The first lens 21 and the second lens 22 have the same structure and can be conventional convex lenses. The plurality of light-emitting units 12 include a first light-emitting unit group and a second light-emitting unit group. The first light-emitting unit group includes a plurality of first light-emitting units 121 spaced apart along the second direction Y, and the second light-emitting unit group includes a plurality of second light-emitting units 122 spaced apart along the second direction Y. The edge display area A2 includes a plurality of second light-emitting unit groups arranged sequentially along the first direction X; the second direction Y is perpendicular to the first direction X. Wherein, the first direction X is the width direction of the light-emitting functional layer, and the second direction Y is the length direction of the light-emitting functional layer.

[0042] The center of the second lens 22 is offset by a distance w relative to the principal optical axis of the second light-emitting unit 122 in the first direction X, close to the center line L1. The offset distance w between the principal optical axis of multiple second light-emitting units 122 in the same second light-emitting unit group and the center of the corresponding second lens 22 is equal.

[0043] In the first direction X, there are any two groups of second light-emitting units, wherein the offset distance w of the second light-emitting unit 122 in the group of second light-emitting units farther away from the central display area A1 is greater than the offset distance w of the second light-emitting unit 122 in the other group of second light-emitting units closer to the central display area A1.

[0044] In the embodiments of this application, the first lens 21 is disposed in a one-to-one correspondence with the first light-emitting unit 121, and the second lens 22 is disposed in a one-to-one correspondence with the second light-emitting unit 122. That is, the orthogonal projection of the first lens 21 on the substrate 11 covers the orthogonal projection of one of the first light-emitting units 121 on the substrate 11. The orthogonal projection of the second lens 22 on the substrate 11 covers the orthogonal projection of one of the second light-emitting units 121 on the substrate 11. Furthermore, the orthogonal projection of the principal optical axis of the second lens 22 on the substrate 11 is located on the side of the orthogonal projection of the principal optical axis of the second light-emitting unit 122 on the substrate 11 closer to the center line L1.

[0045] In embodiments of this application, the central display area A1 includes at least one first light-emitting unit group. Specifically, if the resolution of the light-emitting functional layer 10 is W*H, that is, the light-emitting functional layer 10 includes W rows of light-emitting units 12 spaced apart along the second direction Y and H columns of light-emitting units 12 spaced apart along the first direction X. Wherein, if H is an odd number, the central display area A1 includes an odd number of first light-emitting unit groups, such as 1 first light-emitting unit group, 3 first light-emitting unit groups, 5 first light-emitting unit groups, 7 first light-emitting unit groups, 9 first light-emitting unit groups..., preferably, the central display area A1 includes 1 first light-emitting unit group. If H is an even number, the central display area A1 includes an even number of first light-emitting unit groups, such as 2 first light-emitting unit groups, 4 first light-emitting unit groups, 6 first light-emitting unit groups, 8 first light-emitting unit groups, 10 first light-emitting unit groups..., preferably, the central display area A1 includes 2 first light-emitting unit groups.

[0046] In the embodiments of this application, the two edge display areas A2 include a first display area and a second display area, and the central display area A1 is located between the first display area and the second display area. A plurality of second light-emitting units 121 located in the first display area and a plurality of second light-emitting units 121 located in the second display area are mirror-symmetrical about the center line L1. The distribution of the offset angle of the light emitted by the second lenses 22 located on both sides of the center line L1 with respect to the principal optical axis of their corresponding second light-emitting units 122 is mirror-symmetrical about the center line L1.

[0047] In embodiments of this application, the edge display area A2 includes a plurality of second light-emitting unit groups arranged at intervals along a first direction X. The offset spacing w of the plurality of second light-emitting units 121 located in the same second light-emitting unit group is equal.

[0048] In the embodiments of this application, in the first direction X, the offset spacing w of the second light-emitting unit 122 that is farther away from the central display area A1 is larger.

[0049] In the embodiments of this application, taking a light-emitting unit group with a pitch of 200 micrometers and a corresponding lens 20 with a diameter of 200 micrometers (radius of 100 micrometers) as an example, the offset distance w of multiple second light-emitting units 121 in the second light-emitting unit group adjacent to the central display area A1 along the first direction X is between 1.5 micrometers and 2.5 micrometers, preferably 2 micrometers. If the angle between the light emitted by the first light-emitting unit 121 and the central axis perpendicular to the lens 20 after passing through the lens 20 is 0 degrees, then the angle between the light emitted by the second light-emitting unit 121 and the central axis perpendicular to the lens 20 after passing through the lens 20 is between 0.5 degrees and 1.5 degrees. If the distance is 2 micrometers, then the angle of the light rays is 1 degree. Furthermore, the difference between the offset distance w of multiple second light-emitting units 121 in the kth second light-emitting unit group arranged in a direction away from the central display area A1 and the offset distance w of multiple second light-emitting units 121 in the (k-1)th second light-emitting unit group is 2 micrometers. Specifically, the spacing value can be adjusted according to the actual screen resolution, and the spacing value ranges from 2 nanometers to 20,000 nanometers.

[0050] In the embodiments of this application, the offset distance w of the center of the orthogonal projection of the second light-emitting unit in the kth second light-emitting unit group arranged away from the central display area A1 on the substrate relative to the center of the orthogonal projection of the second lens on the substrate in the first direction, close to the center line, is obtained according to the following formula:

[0051] w = a / (m / 2)*(k-1),

[0052] Where, a represents the dimming main optical axis obtained after the main optical axis of the second light-emitting unit 122 in the second light-emitting unit group farthest from the central display area A1 passes through the second dimming unit 22, the target spacing near the center line in the first direction X relative to the orthogonal projection of the main optical axis of the second light-emitting unit 122 on the substrate 11, m represents the total number of light-emitting units 12 arranged at intervals along the first direction X in the light-emitting functional layer 10, and k represents the kth second light-emitting unit group arranged in the direction away from the central display area A1.

[0053] For example, the width of the light-emitting functional layer 10 is 200 micrometers, and the total number m of the light-emitting units 12 arranged at intervals along the first direction X of the light-emitting functional layer 10 is 650 (the sum of the first light-emitting unit group and the second light-emitting unit group). According to the simulation results, the target spacing a of the second light-emitting unit 121 in the second light-emitting unit group farthest from the central display area A1 is 5 micrometers. Therefore, the offset spacing w of the second light-emitting unit 121 in the second (k=2) second light-emitting unit group arranged along the direction away from the central display area A1 is 5 / (650 / 2)*1 = 15.4 nanometers. The value of the offset spacing w varies depending on the resolution and size of the light-emitting functional layer 10. Generally, the value of a / (m / 2) is between 2 nanometers and 1000 nanometers. For example, the values ​​of a / (m / 2) include 2 nanometers, 3 nanometers, 5 nanometers, 10 nanometers, 15 nanometers, 20 nanometers, 25 nanometers, 30 nanometers...100 nanometers, 200 nanometers,...500 nanometers, 600 nanometers...800 nanometers, 900 nanometers, 1000 nanometers, etc.

[0054] In embodiments of this application, the shape of the lens 20 includes at least one of columnar, frustum-shaped, conical, and trapezoidal shapes.

[0055] In embodiments of this application, the display module further includes an optical imaging unit, which is used to propagate light emitted through the light-emitting functional layer 10 to the windshield. The backward extension of the light after reflection by the windshield forms a virtual image at a first preset position. The larger the angle of the field of view between the eye box and the edge of the virtual image, the larger the offset distance w of the second light-emitting unit 121 farther from the central display area A1. The eye box is the area where the driver's eyes are located.

[0056] like Figure 2a As shown, in the existing display module, the light emitted through the first lens 21 and the light emitted through the second lens 22 are parallel lights. After being reflected by the windshield, they are emitted parallel towards the human eye, making the brightness of the central display area of ​​the displayed image seen by the human eye brighter, while the brightness of the edge display area of ​​the displayed image seen by the human eye gradually darkens.

[0057] like Figure 2b As shown, in the embodiment of this application, the angle of the light emitted by the second light-emitting unit 121 after shifting away from the central display area changes (emitted towards the central axis of the second lens 22) in the display module. After being reflected by the windshield, the light converges towards the direction of the light emitted by the first lens 21, so that the brightness of the central display area and the edge display area of ​​the display image seen by the human eye tends to be consistent.

[0058] like Figure 3aAs shown, in existing display modules, the display brightness of the image seen by the human eye is such that when the display brightness of the central display area A1 is 120 to 140 candela per square meter, the display brightness of the edge display area A2 (exemplarily corresponding to the display brightness at ±10°) is 80 to 95 candela per square meter. That is, the display brightness of the central display area A1 and the display brightness of the edge display area A2 differ significantly (the display brightness of the edge display area A2 is less than or equal to 65% of the display brightness of the central display area A1), resulting in poor brightness uniformity of the displayed image seen by the human eye.

[0059] like Figure 3b As shown, by shifting the second light-emitting unit 121 in the light-emitting unit 12 located in the edge display area A2 away from the center display area A1, when the display brightness of the center display area A1 is 120 candela per square meter to 140 candela per square meter, the display brightness of the edge display area A2 (exemplarily corresponding to the display brightness at a horizontal field of view of ±10°) is also 120 candela per square meter to 140 candela per square meter. That is, the difference between the display brightness of the center display area A1 and the display brightness of the edge display area A2 is small, so that the brightness of the edge area and the brightness of the center area of ​​the displayed image seen by the eye tend to be consistent (the display brightness of the edge display area A2 is greater than or equal to 90% of the display brightness of the center display area A1), thereby improving the brightness uniformity of the displayed image seen by the human eye.

[0060] like Figure 4 As shown, an embodiment of this application provides a display module 200. The difference between display module 200 and display module 100 is that the edge display area A2 in display module 200 includes a first display area and a second display area arranged at intervals along a first direction X, and the center display area A1 is located between the first display area and the second display area. Both the first display area and the second display area include multiple sub-display areas A21 arranged at intervals along the first direction X. Each of the multiple sub-display areas A21 is provided with N groups of second light-emitting units, that is, the number of groups of second light-emitting units in the multiple sub-display areas A21 is equal. Among them, the offset spacing w of the multiple second light-emitting units 121 located in the same sub-display area A21 is equal, and N is a positive integer greater than or equal to 2, for example, N is equal to 3, 4, 5, 6, 7, 8, 9, 10...15...20...25...30...50...100....

[0061] In the first direction X, the offset spacing w of the second light-emitting unit 121 in the sub-display area A21 that is farther away from the central display area A1 is larger.

[0062] In the embodiments of this application, when N is an odd number, the offset spacing w of the plurality of second light-emitting units 121 in the same sub-display area A21 is equal to the offset spacing w of the second light-emitting units 121 in the second light-emitting unit group located at the center of the sub-display area A21.

[0063] For example, if the sub-display area A21 is adjacent to the central display area A1, that is, the first sub-display area A21 in the first direction X, and the sub-display area A21 includes 5 groups of second light-emitting units, then the offset distance w of the multiple second light-emitting units 121 in the 5 groups of second light-emitting units in the sub-display area A21 is equal to the offset distance w of the second light-emitting units 121 in the 3rd group of second light-emitting units arranged in the sub-display area A21 in the direction away from the central display area A1.

[0064] In an embodiment of this application, taking a light-emitting unit group with a pitch of 200 micrometers and a corresponding lens 20 with a diameter of 200 micrometers (radius of 100 micrometers) as an example, the difference between the offset spacing w of the plurality of second light-emitting units 121 in the kth second light-emitting unit group arranged along the direction away from the central display area A1 and the offset spacing w of the plurality of second light-emitting units 121 in the (k-1)th second light-emitting unit group is 2 micrometers. Therefore, the offset spacing w of the plurality of second light-emitting units 121 in the sub-display area A21 adjacent to the central display area A1 is all 6 micrometers.

[0065] In the embodiments of this application, when N is an even number, the offset spacing w of the plurality of second light-emitting units 121 in the same sub-display area A21 is equal to the average value of the offset spacing w of the second light-emitting units 121 in the N groups of second light-emitting units in the sub-display area A21.

[0066] For example, if the sub-display area A21 is adjacent to the central display area A1, that is, the first sub-display area A21 in the first direction X, and the sub-display area A21 includes 6 groups of second light-emitting units, then the offset distance w of the multiple second light-emitting units 121 in the 6 groups of second light-emitting units in the sub-display area A21 is equal to the average value of the offset distance w of the second light-emitting units 121 in the 6 groups of second light-emitting units in the sub-display area A21.

[0067] In an embodiment of this application, taking a light-emitting unit group with a pitch of 200 micrometers and a corresponding lens 20 with a diameter of 200 micrometers (radius of 100 micrometers) as an example, the difference between the offset spacing w of the plurality of second light-emitting units 121 in the kth second light-emitting unit group arranged along the direction away from the central display area A1 and the offset spacing w of the plurality of second light-emitting units 121 in the (k-1)th second light-emitting unit group is 2 micrometers. Therefore, the offset spacing w of the plurality of second light-emitting units 121 in the sub-display area A21 adjacent to the central display area A1 is all 7 micrometers.

[0068] Alternatively, when N is an even number, the offset spacing w of multiple second light-emitting units 121 in the same sub-display area A21 is equal to the average offset spacing w of the second light-emitting units 121 in the two second light-emitting unit groups located at the center of the sub-display area A21.

[0069] For example, if a sub-display area A21 is adjacent to the central display area A1, that is, the first sub-display area A21 in the first direction X, and the sub-display area A21 includes 6 groups of second light-emitting units, then the offset distance w of the multiple second light-emitting units 121 in the 6 groups of second light-emitting units in the sub-display area A21 is equal to the average of the offset distance w of the second light-emitting units 121 in the 3rd group of second light-emitting units arranged in the direction away from the central display area A1 and the offset distance w of the second light-emitting units 121 in the 4th group of second light-emitting units.

[0070] The display module 200 provided in this application expands the offset step size and reduces the process accuracy by N times by offsetting multiple second light-emitting units 121 in N second light-emitting unit groups with the same spacing. This avoids the phenomenon that the process accuracy cannot be achieved when multiple second light-emitting units 121 in a single second light-emitting unit group are offset due to the offset spacing w being too small. This reduces the process difficulty and improves the brightness uniformity of the display module.

[0071] like Figure 5 and Figure 6 As shown, an embodiment of this application provides a display module 300. The difference between display module 300 and display module 200 is that the number of second light-emitting unit groups in the sub-display areas A21 farther away from the central display area A1 in display module 300 is greater. That is, the number of second light-emitting unit groups in the multiple sub-display areas A21 along the direction away from the central display area A1 is not equal.

[0072] Specifically, in the display module 300, the edge display area A2 includes a first display area and a second display area, and the central display area A1 is located between the first display area and the second display area. Both the first and second display areas include multiple sub-display areas A21 arranged along a direction away from the central display area A1. The first light-emitting unit group includes multiple first light-emitting units 121 arranged along a second direction Y, and the second light-emitting unit group includes multiple second light-emitting units 122 arranged along a second direction Y. The first and second light-emitting unit groups are arranged along a first direction X.

[0073] Specifically, in two adjacent sub-display areas A21 along the direction away from the central display area A1, the number of second light-emitting unit groups in the sub-display area A21 away from the central display area A1 is t more than the number of second light-emitting unit groups in the sub-display area A21 closer to the central display area A1, where t is a positive integer greater than or equal to 1, for example, t equals 1, 2, 3, 4, 5, 6, 7, 8, 9, 10...

[0074] Figure 5 The example shows that the number of second light-emitting unit groups in the sub-display area A21 adjacent to the central display area A1 is 1, and the number of second light-emitting unit groups in the sub-display area A21 adjacent to the central display area A1 in the direction away from the central display area A1 is 3.

[0075] Figure 6 The example shows that the number of second light-emitting unit groups in a plurality of sub-display areas A21 arranged in a direction away from the central display area A1 can increase by one in turn. For example, the number of second light-emitting unit groups in three sub-display areas A21 arranged in a direction away from the central display area A1 are 2, 3 and 4 respectively.

[0076] Furthermore, the number of additional second light-emitting unit groups in the multiple sub-display areas A21 arranged in the direction away from the central display area A1 is not equal. For example, if the number of additional second light-emitting unit groups is a multiple of 2, then the number of second light-emitting unit groups in the three sub-display areas A21 arranged in the direction away from the central display area A1 are 2, 4, and 8, respectively.

[0077] like Figures 7 to 10 As shown, an embodiment of this application provides a display module 400. The difference between display module 400 and display module 100 is that in display module 400, the first light-emitting unit group corresponds to n1 first lenses 21, and the second light-emitting unit group corresponds to n2 second lenses 22. n1 and n2 can be equal or unequal, and both n1 and n2 are positive integers greater than or equal to 2. For example, n1 equals 3, 4, 5, 6, 7, 8, 9, 10..., and n2 equals 3, 4, 5, 6, 7, 8, 9, 10... That is, the first light-emitting unit group corresponds to at least two first lenses 21, and the second light-emitting unit group corresponds to at least two second lenses 22. The first light-emitting unit group includes a plurality of first light-emitting units 121 arranged along the second direction Y, and the second light-emitting unit group includes a plurality of second light-emitting units 122 arranged along the second direction Y. The first light-emitting unit group and the second light-emitting unit group are arranged along the first direction X.

[0078] Figure 7 The example shows a first light-emitting unit group corresponding to two first lenses 21, and a second light-emitting unit group corresponding to two second lenses 22.

[0079] Figure 8 The example shows a first light-emitting unit group corresponding to two first lenses 21, and a second light-emitting unit group corresponding to three second lenses 22.

[0080] In the embodiments of this application, the orthogonal projection of the first lens 21 onto the substrate 11 covers the orthogonal projections of m1 first light-emitting units 121 in the first light-emitting unit group onto the substrate 11, and the orthogonal projection of the second lens 22 onto the substrate 11 covers the orthogonal projections of the principal optical axes of m2 second light-emitting units 121 in the second light-emitting unit group onto the substrate 11. m1 and m2 may be equal or unequal, and both m1 and m2 are positive integers greater than or equal to 2. For example, m1 equals 3, 4, 5, 6, 7, 8, 9, 10..., and m2 equals 3, 4, 5, 6, 7, 8, 9, 10...

[0081] For example, the orthogonal projection of the first lens 21 on the substrate 11 covers the orthogonal projection of the two first light-emitting units 121 in the first light-emitting unit group on the substrate 11, and the orthogonal projection of the second lens 22 on the substrate 11 covers the orthogonal projection of the main optical axis of the two second light-emitting units 121 in the second light-emitting unit group on the substrate 11.

[0082] For example, the orthogonal projection of the first lens 21 on the substrate 11 covers the orthogonal projection of the two first light-emitting units 121 in the first light-emitting unit group on the substrate 11, and the orthogonal projection of the second lens 22 on the substrate 11 covers the orthogonal projection of the main optical axis of the three second light-emitting units 121 in the second light-emitting unit group on the substrate 11.

[0083] Specifically, the orthogonal projection of the first lens 21 on the substrate 11 covers the orthogonal projection of at least two first light-emitting units 121 in the first light-emitting unit group on the substrate 11, and the orthogonal projection of the second lens 22 on the substrate 11 covers the orthogonal projection of the main optical axis of at least two second light-emitting units 121 in the second light-emitting unit group on the substrate 11.

[0084] like Figure 9As shown, an embodiment of this application provides a display module 500. The difference between display module 500 and display module 100 is that: in display module 500, the first lens 21 includes a first sub-lens 211 and a second sub-lens 212. The orthogonal projection of the first sub-lens 211 onto the substrate 11 covers the orthogonal projections of at least two first light-emitting units 121 in the first light-emitting unit group onto the substrate 11. The orthogonal projection of the second sub-lens 212 onto the substrate 11 covers the orthogonal projection of one first light-emitting unit 121 in the first light-emitting unit group onto the substrate 11. And / or, the second lens 22 includes a third sub-lens 221 and a fourth sub-lens 222. The orthogonal projection of the third sub-lens 221 onto the substrate 11 covers the orthogonal projections of the principal optical axes of at least two second light-emitting units 121 in the second light-emitting unit group onto the substrate 11. The orthogonal projection of the fourth sub-lens 222 onto the substrate 11 covers the orthogonal projection of the principal optical axis of one second light-emitting unit 121 in the second light-emitting unit group onto the substrate 11.

[0085] Figure 9 The example shows that the orthogonal projection of the first sub-lens 211 onto the substrate 11 covers the orthogonal projections of the two first light-emitting units 121 in the first light-emitting unit group onto the substrate 11; the orthogonal projection of the second sub-lens 212 onto the substrate 11 covers the orthogonal projection of one of the first light-emitting units 121 in the first light-emitting unit group onto the substrate 11; the orthogonal projection of the third sub-lens 221 onto the substrate 11 covers the orthogonal projection of the principal optical axis of the two second light-emitting units 121 in the second light-emitting unit group onto the substrate 11; and the orthogonal projection of the fourth sub-lens 222 onto the substrate 11 covers the orthogonal projection of the principal optical axis of one of the second light-emitting units 121 in the second light-emitting unit group onto the substrate 11.

[0086] like Figure 10 As shown, an embodiment of this application provides a display module 600. The difference between display module 600 and display module 100 is that in display module 600, a plurality of first light-emitting units 121 in the first light-emitting unit group correspond to a first lens 21, and a plurality of second light-emitting units 122 in the second light-emitting unit group correspond to a second lens 22. Specifically, the orthogonal projection of the first lens 21 on the substrate 11 covers the orthogonal projection of the plurality of first light-emitting units 121 in the first light-emitting unit group on the substrate 11, and the orthogonal projection of the second lens 22 on the substrate 11 covers the orthogonal projection of the principal optical axis of the plurality of second light-emitting units 121 in the second light-emitting unit group on the substrate 11.

[0087] The shapes of the multiple first lenses 21 can be the same or different, the shapes of the multiple second lenses 22 can be the same or different, and the shapes of the first lenses 21 and the second lenses 22 can be the same or different.

[0088] like Figure 11As shown, an embodiment of this application provides a display module 700. The difference between display module 700 and display module 100 is that in display module 700, the first lens 21 is correspondingly arranged with the first light-emitting unit 121, and the second lens 22 is correspondingly arranged with the second light-emitting unit 122. The vector vertices Q of the first lens 21 and the second lens 22 have different positions, and the orthographic projection of the vector vertex Q of the first lens 21 on the substrate 11 coincides with the orthographic projection of the principal optical axis of the first light-emitting unit 121 on the substrate 11. The orthographic projection of the vector vertex Q of the second lens 22 on the substrate 11 is located on the side of the orthographic projection of the principal optical axis L2 of the second light-emitting unit 122 on the substrate 11 closer to the center line L1. That is, by adjusting the relative positions of the vector vertices Q of the second lenses 22 located on both sides of the center line L1, the distribution of the offset angle of the principal optical axis of the light emitted by the second lenses 22 located on both sides of the center line L1 is mirror-symmetrical about the center line L1.

[0089] The shapes of the multiple first lenses 21 can be the same or different, the shapes of the multiple second lenses 22 can be the same or different, and the shapes of the first lenses 21 and the second lenses 22 can be the same or different.

[0090] The above provides a detailed description of a display module provided by the embodiments of this application. The description of the above embodiments is only for the purpose of helping to understand the core ideas of this application, and the above description should not be construed as a limitation on the scope of protection of this application.

Claims

1. A display module, characterized in that, include: The light-emitting functional layer includes a substrate and a plurality of light-emitting units, wherein the plurality of light-emitting units are disposed on the substrate and arranged in an array, and the light-emitting functional layer includes a central display area and two edge display areas, wherein the light-emitting functional layer is arranged sequentially in a first direction in the order of the edge display areas, the central display area and the edge display areas; The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, wherein the first light-emitting unit is located in the central display area and the second light-emitting unit is located in the edge display area; Multiple dimming units are disposed on one side of the light-emitting surface of the light-emitting functional layer, including a first dimming unit and a second dimming unit, wherein the first dimming unit corresponds to the first light-emitting unit and the second dimming unit corresponds to the second light-emitting unit; Wherein, on the plane where the light-emitting functional layer is located, the light-emitting functional layer has a center line perpendicular to the first direction; the main optical axis of the first light-emitting unit, after passing through the first dimming unit, is coincident with the main optical axis of the first light-emitting unit; the main optical axis of the second light-emitting unit, after passing through the second dimming unit, is arranged close to the center line relative to the main optical axis of the second light-emitting unit. The first dimming unit includes a first lens, and the second dimming unit includes a second lens. The first lens and the second lens have the same structure. The plurality of light-emitting units include a first light-emitting unit group and a second light-emitting unit group. The first light-emitting unit group includes a plurality of first light-emitting units spaced apart along a second direction, and the second light-emitting unit group includes a plurality of second light-emitting units spaced apart along the second direction. The edge display area includes a plurality of second light-emitting unit groups arranged sequentially along the first direction. Both the first direction and the second direction are located on the plane where the light-emitting functional layer is located, and the second direction is perpendicular to the first direction. Wherein, the offset distance w between the center of the second lens and the principal optical axis of the second light-emitting unit in the first direction and the center line is relatively close to the center line, and the offset distance w between the principal optical axis of multiple second light-emitting units in the same group of second light-emitting units and the center of the corresponding second lens is equal; The first light-emitting unit group corresponds to at least one first lens, and the second light-emitting unit group corresponds to at least one second lens; The first lens includes a first sub-lens and a second sub-lens. The orthographic projection of the first sub-lens onto the substrate covers the orthographic projection of at least two of the first light-emitting units in the first light-emitting unit group onto the substrate. The orthographic projection of the second sub-lens onto the substrate covers the orthographic projection of one of the first light-emitting units in the first light-emitting unit group onto the substrate. And / or, the second lens includes a third sub-lens and a fourth sub-lens, wherein the orthographic projection of the third sub-lens onto the substrate covers the orthographic projection of at least two of the second light-emitting units in the second light-emitting unit group onto the substrate, and the orthographic projection of the fourth sub-lens onto the substrate covers the orthographic projection of one of the second light-emitting units in the second light-emitting unit group onto the substrate.

2. The display module according to claim 1, characterized in that, In the first direction, there are any two groups of second light-emitting units, wherein the offset distance w of the second light-emitting units in the group of second light-emitting units farther away from the central display area is greater than the offset distance w of the second light-emitting units in the other group of second light-emitting units closer to the central display area.

3. The display module according to claim 1, characterized in that, The offset spacing w in the kth group of the second light-emitting units arranged along a direction away from the central display area is obtained according to the following formula: ， Where, a represents the dimming main optical axis obtained after the main optical axis of the second light-emitting unit in the second light-emitting unit group farthest from the central display area passes through the second dimming unit, the orthogonal projection of the main optical axis of the second light-emitting unit on the substrate, and the target spacing away from the center line in the first direction, m represents the total number of light-emitting units spaced apart in the light-emitting functional layer along the first direction, and k represents the kth second light-emitting unit group arranged in the direction away from the central display area.

4. The display module according to claim 1, characterized in that, The two edge display areas are a first display area and a second display area, respectively. The central display area is located between the first display area and the second display area. The second light-emitting unit located in the first display area and the second light-emitting unit located in the second display area are mirror-symmetrical about the center line. The distribution of the offset angles of the main optical axis of the dimming emitted by the second lens located on both sides of the center line with respect to the main optical axis of its corresponding second light-emitting unit is arranged in a mirror symmetrical manner with respect to the center line.

5. The display module according to claim 4, characterized in that, Both the first display area and the second display area include multiple sub-display areas arranged at intervals along the first direction. Each of the multiple sub-display areas is provided with N groups of the second light-emitting units. The offset spacing w of the multiple second light-emitting units located in the same sub-display area is equal, and N is a positive integer greater than or equal to 2. Furthermore, in the first direction, the offset spacing w of the second light-emitting unit in the sub-display area that is farther away from the central display area is larger.

6. The display module according to claim 5, characterized in that, When N is an odd number, the offset spacing w of the plurality of second light-emitting units in the same sub-display area is equal to the offset spacing w of the second light-emitting units in the group of second light-emitting units located at the center of the sub-display area; When N is an even number, the offset spacing w of the plurality of second light-emitting units in the same sub-display area is equal to the average of the offset spacing w of the second light-emitting units in the N groups of second light-emitting units in the sub-display area.

7. The display module according to claim 5, characterized in that, The number of second light-emitting unit groups is greater in sub-display areas that are farther away from the central display area.

8. The display module according to claim 1, characterized in that, The orthogonal projection of the first lens onto the substrate covers the orthogonal projection of a plurality of the first light-emitting units in the first light-emitting unit group onto the substrate, and the orthogonal projection of the second lens onto the substrate covers the orthogonal projection of a plurality of the second light-emitting units in the second light-emitting unit group onto the substrate.

9. The display module according to claim 1, characterized in that, The shapes of the first lens, the second lens, the first sub-lens, the second sub-lens, the third sub-lens, and the fourth sub-lens include at least one of cylindrical, frustum-shaped, conical, and trapezoidal.

10. The display module according to claim 1, characterized in that, The first dimming unit includes a first lens, and the second dimming unit includes a second lens. The vector vertices of the first lens and the second lens have different positions. The orthographic projection of the vector vertex of the first lens on the substrate coincides with the orthographic projection of the principal optical axis of the first light-emitting unit on the substrate. The orthographic projection of the vector vertex of the second lens on the substrate is located on the side of the orthographic projection of the principal optical axis of the second light-emitting unit on the substrate that is closer to the center line.

11. A field-of-view display device for use in a vehicle, characterized in that, The field-of-view display device includes the display module as described in any one of claims 1-10.

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