Backlight module and display module

Abstract

The invention provides a backlight module and a display module, the backlight module comprises a light-emitting assembly, a first dimming layer and a second dimming layer, the light-emitting assembly is used for emitting first light, and the light-emitting assembly comprises a plurality of light-emitting units arranged at intervals; the first dimming layer is arranged on a light emitting path of the light emitting assembly, the first dimming layer is used for receiving first light rays and forming second light rays to be emitted, the first dimming layer comprises a plurality of lens units, each lens unit corresponds to one light emitting unit, and a splicing slit is formed between every two adjacent lens units; the second dimming layer is arranged on a light emitting path of the first dimming layer, the second dimming layer comprises a plurality of dimming parts, each dimming part covers one splicing slit, and the dimming parts are used for controlling the intensity or light emitting angle of second light emitted by the splicing slits, so that the brightness mutation at the splicing slits is weakened, and the uniformity of the second light is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a backlight module and a display module. Background Art

[0002] Augmented reality head-up display (AR-HUD) is a system that projects information such as vehicle speed and navigation onto the windshield through an optoelectronic display module, enabling the driver to see the required information without turning or lowering their head. This technology reduces the switching between observing the road and the instrument panel, improves safety, and reduces eye fatigue.

[0003] To meet the brightness requirements of AR-HUD technology, a super-high-brightness narrow-view backlight source is required. This backlight source has strong light collimation, so it is usually paired with a polygonal lens to ensure that the light emitted by the backlight source is concentrated and accurate. However, the splicing interface between the lenses will form obvious honeycomb-like traces in the displayed image, affecting the display effect. Summary of the Invention

[0004] Embodiments of this application provide a backlight module and a display module to weaken the problem of sudden brightness change at the splicing slit.

[0005] To achieve the above function, the technical solutions provided by the embodiments of this application are as follows:

[0006] Embodiments of this application provide a backlight module, including:

[0007] A light-emitting component for emitting first light, the light-emitting component including a plurality of light-emitting units arranged at intervals;

[0008] A first dimming layer disposed on the light-emitting path of the light-emitting component. The first dimming layer is used to receive the first light and emit second light. The first dimming layer includes a plurality of lens units, one lens unit corresponding to one light-emitting unit, and a splicing slit is provided between two adjacent lens units;

[0009] A second dimming layer disposed on the light-emitting path of the first dimming layer. The second dimming layer includes a plurality of dimming parts, one dimming part covering one splicing slit, and the dimming part is used to control the intensity or light-emitting angle of the second light emitted from the splicing slit.

[0010] In one embodiment, the central axis of the dimming part coincides with the central axis of the splicing slit;

[0011] Wherein, the light-dimming part includes a first light-dimming area and a second light-dimming area. The second light-dimming area is located on a side of the first light-dimming area away from the central axis of the light-dimming part, and the total light transmittance of the film layer of the second light-dimming area is greater than that of the film layer of the first light-dimming area.

[0012] In one embodiment, the light transmittance of the light-dimming part is greater than or equal to 40% and less than or equal to 80%.

[0013] In one embodiment, the light-dimming part includes a first light-dimming sub-part and a second light-dimming sub-part. The second light-dimming sub-part is located on a side of the first light-dimming sub-part away from the first light-dimming layer. The central axes of the first light-dimming sub-part and the second light-dimming sub-part are coaxially arranged, and the width of the first light-dimming sub-part is greater than that of the second light-dimming sub-part.

[0014] In one embodiment, the width of the second light-dimming sub-part is 70% - 90% of the width of the first light-dimming sub-part.

[0015] In one embodiment, the central axis of the light-dimming part coincides with the central axis of the splicing slit. The light-dimming part includes a first light-dimming area and a second light-dimming area. The second light-dimming area is located on a side of the first light-dimming area away from the central axis of the light-dimming part;

[0016] Wherein, the light-dimming part includes a plurality of light-dimming units, and the number of light-dimming units per unit area in the second light-dimming area is less than that in the first light-dimming area.

[0017] In one embodiment, the diameter of the light-dimming unit is greater than or equal to 10 microns and less than or equal to 80 microns.

[0018] In one embodiment, the second light-dimming layer includes a transparent substrate that covers the first light-dimming layer. Wherein, the light-dimming part is disposed on one side of the transparent substrate.

[0019] In one embodiment, the light-dimming part is disposed on a side of the splicing slit away from the light-emitting component, and the light-dimming part is in direct contact with the splicing slit.

[0020] An embodiment of the present application provides a display module, including:

[0021] A display panel for emitting display light;

[0022] A backlight module disposed on a backlight side of the display panel. The backlight module is the backlight module described in any of the above embodiments.

[0023] The beneficial effects of the embodiments of the present application are as follows: The embodiments of the present application provide a backlight module and a display module. The backlight module includes a light-emitting component, a first dimming layer, and a second dimming layer. The light-emitting component is used to emit first light, and the light-emitting component includes a plurality of light-emitting units arranged at intervals; the first dimming layer is arranged on the light-emitting path of the light-emitting component, and the first dimming layer is used to receive the first light and form second light for emission. The first dimming layer includes a plurality of lens units, one lens unit corresponds to one light-emitting unit, and a splicing slit is arranged between two adjacent lens units; the second dimming layer is arranged on the light-emitting path of the first dimming layer, and the second dimming layer includes a plurality of dimming parts, one dimming part covers one splicing slit, and the dimming part is used to control the intensity or the light-emitting angle of the second light emitted from the splicing slit, so as to weaken the brightness mutation at the splicing slit and improve the uniformity of the second light. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the backlight module provided by the embodiments of the present application;

[0026] Figure 2 It is the first exploded view of the backlight module provided by the embodiments of the present application;

[0027] Figure 3 It is the optical path diagram of the backlight module provided by the embodiments of the present application;

[0028] Figure 4 It is the first schematic structural diagram of the first dimming layer provided by the embodiments of the present application;

[0029] Figure 5 It is the first schematic structural diagram of the second dimming layer provided by the embodiments of the present application;

[0030] Figure 6 It is the second schematic structural diagram of the second dimming layer provided by the embodiments of the present application;

[0031] Figure 7 It is the second exploded view of the backlight module provided by the embodiments of the present application;

[0032] Figure 8 It is the second schematic structural diagram of the first dimming layer provided by the embodiments of the present application;

[0033] Figure 9Schematic structural diagram of the display module provided by the embodiment of the present application;

[0034] Figure 10 Schematic structural diagram of the display device provided by the embodiment of the present application.

[0035] Explanation of reference numerals:

[0036] 1 - Backlight module; 11 - Light-emitting component; 12 - First lens layer; 13 - First dimming layer; 14 - Second dimming layer; 15 - Light homogenizing film;

[0037] 111 - Backplane; 112 - Light-emitting unit; 121 - Convex lens; 131 - Lens unit; 132 - Stitching slit; 141 - Transparent substrate; 142 - Dimming part; 1401 - First dimming area; 1402 - Second dimming area; 1420 - Dimming unit; 1421 - First dimming sub-part; 1422 - Second dimming sub-part; 1423 - Third dimming sub-part; 151 - First light homogenizing sub-film; 152 - Second light homogenizing sub-film;

[0038] 100 - Display module; 200 - Display device; 2 - Display panel; 210 - Reflection module; 4 - Windshield; 211 - First reflector; 212 - Second reflector. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes, and the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The following disclosure provides many different embodiments for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, various specific examples of processes and materials are provided in the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0043] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ; wherein, Figure 1 is a schematic structural diagram of a backlight module provided by an embodiment of the present application; Figure 2 is a first exploded view of a backlight module provided by an embodiment of the present application; Figure 3 is an optical path diagram of a backlight module provided by an embodiment of the present application; Figure 4 is a first schematic structural diagram of a first dimming layer provided by an embodiment of the present application.

[0044] This embodiment provides a backlight module 1, and the backlight module 1 includes a light-emitting component 11, and a first lens layer 12, a first dimming layer 13, a second dimming layer 14, and a light homogenizing film 15 that are sequentially stacked on the light-emitting side of the light-emitting component 11. The film layers can be seamlessly bonded through optical glue.

[0045] The light-emitting component 11 is used to emit a first light ray L1. The light-emitting component 11 includes a backplane 111 and a plurality of light-emitting units 112 spaced apart on the backplane 111. The light-emitting units 112 include, but are not limited to, micro light-emitting diodes (Mini-Light-Emitting Diode, Mini-LED). The backplane 111 includes, but is not limited to, a circuit board. The backplane 111 is used to provide a driving electrical signal for the light-emitting units 112. The first lens layer 12 may include a plurality of convex lenses 121, and one convex lens 121 is provided corresponding to one light-emitting unit 112. The convex lens 121 is used to perform primary diffusion on the first light ray L1 to improve the uniformity of the first light ray L1.

[0046] The first dimming layer 13 is disposed on a side of the first lens layer 12 away from the light-emitting component 11. The first dimming layer 13 is configured to receive the first light beam L1 and emit a second light beam L2. Specifically, the first dimming layer 13 includes a plurality of lens units 131. One lens unit 131 is disposed corresponding to one light-emitting unit 112, and a splicing slit 132 is disposed between two adjacent lens units 131. Among them, the lens unit 131 includes, but is not limited to, one of a Fresnel lens, an aspherical lens, or a free-form surface lens. The shape of the outer contour of the lens unit 131 includes, but is not limited to, one of a hexagon, a triangle, a quadrilateral, a rhombus, or a rectangle.

[0047] It should be noted that, in this embodiment, an example is given in which the outer contour of the lens unit 131 is in the shape of a regular hexagon, and a plurality of the lens units 131 are arranged in a honeycomb pattern to form the first dimming layer 13. Among them, when the lens units 131 in the shape of regular hexagons are spliced, gaps can be reduced, thereby reducing the refraction loss of the first light beam L1. The first dimming layer 13 converges the first light beam L1 to form a collimated second light beam L2, thereby improving the utilization efficiency of light and reducing light scattering.

[0048] The second dimming layer 14 is disposed on a side of the first dimming layer 13 away from the first lens layer 12. The second dimming layer 14 is configured to control the intensity or the light-emitting angle of part of the second light beam L2. Specifically, the second dimming layer 14 includes a plurality of dimming portions 142. One dimming portion 142 covers one splicing slit 132. The dimming portion 142 is configured to reduce the intensity of the second light beam. The total light transmittance of the dimming portion 142 is greater than or equal to 40% and less than or equal to 80%. Or the dimming portion 142 is configured to control the light-emitting angle of the second light beam. The dimming portion scatters the second light beam, so that the second light beam L2 passing between adjacent lens units 131 has a smooth transition, weakens the brightness mutation at the splicing slit 132, and improves the uniformity of the second light beam L2.

[0049] The light homogenizing film 15 is disposed on a side of the second dimming layer 14 away from the first dimming layer 13. The light homogenizing film 15 is configured to perform secondary diffusion and homogenization processing on the second light beam L2 incident on its incident surface, and form a uniform high-brightness backlight source to irradiate the display panel, thereby effectively improving the display effect of the display panel.

[0050] Specifically, the light homogenizing film 15 includes a first light homogenizing sub-film 151 and a second light homogenizing sub-film 152. The first light homogenizing sub-film 151 is located between the second light modulating layer 14 and the second light homogenizing sub-film 152. The first light homogenizing sub-film 151 can be a one-dimensional diffusing film, and the first light homogenizing sub-film 151 is used to diffuse the horizontal divergence angle of the second light L2 (for example, diffusing to ±45 degrees), so as to adapt to the horizontal viewing angle requirements of wide-screen displays. The second light homogenizing sub-film 152 can be an omnidirectional diffusing film with a bi-directional diffusing microstructure, and the second light homogenizing sub-film 152 is used to symmetrically diffuse the divergence angle of the second light L2 in the horizontal and vertical directions (for example, diffusing to ±60 degrees), so as to achieve uniform distribution of the light field of the second light L2 in the two-dimensional space.

[0051] It should be noted that the horizontal direction and the vertical direction in this embodiment respectively refer to two mutually orthogonal axes in the two-dimensional coordinate system established based on the display surface of the display panel - where the horizontal direction can be defined as the direction parallel to the long side of the display panel, and the vertical direction can be defined as the direction parallel to the short side of the display panel; in practical applications, the horizontal direction and the vertical direction can be interchanged and defined according to the horizontal / vertical installation method of the screen, and this embodiment does not make specific limitations in this regard.

[0052] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ; among them, Figure 5 is the first structural schematic diagram of the second light modulating layer provided by the embodiment of the present application.

[0053] In one embodiment, the second light modulating layer 14 includes a transparent substrate 141 and a plurality of light modulating parts 142. The transparent substrate 141 covers the first light modulating layer 13. The plurality of light modulating parts 142 are arranged on one side of the transparent substrate 141, and one light modulating part 142 covers one splicing slit 132. The light modulating part 142 is used to control the intensity of the second light L2 emitted from the splicing slit 132, so as to weaken the brightness mutation at the splicing slit 132 and improve the uniformity of the second light L2 emitted from the first light modulating layer 13.

[0054] It should be noted that the plurality of light modulating parts 142 can be arranged on the light-emitting side of the transparent substrate 141, or the plurality of light modulating parts 142 can be arranged on the light-incident side of the transparent substrate 141. This embodiment does not make specific limitations in this regard; among them, in Figure 5 this embodiment is illustrated by taking the example that the plurality of light modulating parts 142 can be arranged on the light-emitting side of the transparent substrate 141.

[0055] Specifically, the transparent substrate 141 may be a polyethylene terephthalate (PET) layer. Polyethylene terephthalate has good light transmittance, low birefringence, and mechanical stability, and can provide stable support for the light modulating part 142 without introducing additional light loss.

[0056] The material of the light modulating part 142 includes but is not limited to transparent ink. The transparent ink can be deposited on the transparent substrate 141 through screen printing technology, so that the shape and light transmittance of the light modulating part 142 can be precisely controlled; the thickness of the light modulating part 142 is greater than or equal to 15 microns and less than or equal to 300 microns. By precisely controlling the thickness of the light modulating part 142, the light modulating part 142 can achieve sufficient light control when adjusting light and will not overly affect the brightness.

[0057] Furthermore, the central axis W0 of the light modulating part 142 coincides with the central axis O1 of the splicing slit 132, so that the transmission path of the second light L2 entering the light modulating part 142 from the splicing slit 132 remains consistent, avoiding distortion or irregular distribution of the second light L2; at the same time, the light modulating part 142 can precisely control the intensity of the second light L2 emitted from the splicing slit 132.

[0058] Among them, the light modulating part 142 includes a first light modulating area 1401 and a second light modulating area 1402. The second light modulating area 1402 is located on the side of the first light modulating area 1401 away from the central axis W0 of the light modulating part 142, and the total light transmittance of the second light modulating area 1402 is greater than the total light transmittance of the first light modulating area 1401. Thus, by differentially setting the transmittance in different light modulating areas of the light modulating part 142, the intensity of the second light L2 is controlled, the uniformity of the second light L2 emitted from the splicing slit 132 is improved, and further the display effect of the subsequent display panel is enhanced.

[0059] It can be understood that in this embodiment, by setting the light transmittance of the first light modulating area 1401 to be less than that of the second light modulating area 1402, the intensity of the second light L2 emitted from near the central axis O1 of the splicing slit 132 is reduced, so that the light emitted from the first light modulating area 1401 is softer and more uniform, avoiding obvious bright lines or light spots in the subsequent display image; at the same time, by setting the total light transmittance of the second light modulating area 1402 to be greater than that of the first light modulating area 1401, more of the second light L2 is allowed to pass through the second light modulating area 1402, avoiding an overly dark effect on the subsequent display image due to the low light transmittance of the first light modulating area 1401.

[0060] Specifically, the total light transmittance of the light dimming part 142 is greater than or equal to 40% and greater than or equal to 80%. By adjusting the light transmittance of the light dimming part 142, the brightness of the second light ray L2 emitted from the splicing slit 132 is maintained within a certain range, thereby avoiding obvious bright lines or light spots in the subsequent display screen and optimizing the display effect. Among them, the light transmittance in the first light dimming area 1401 is relatively low, which can effectively suppress the intensity of the second light ray L2 emitted near the central axis O1 of the splicing slit 132, avoiding local over-high brightness caused by the over-concentration of the second light ray L2, and thus reducing the problems of bright lines or uneven brightness distribution. The light transmittance of the second light dimming area 1402 is relatively high, allowing more of the second light ray L2 to pass through, thereby ensuring that the brightness of other areas of the light dimming part 142 is maintained within a uniform range.

[0061] Please continue to combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ; In an embodiment, the light dimming part 142 includes a first light dimming sub-part 1421 and a second light dimming sub-part 1422. The second light dimming sub-part 1422 is located on the side of the first light dimming sub-part 1421 away from the first light dimming layer 13. The central axis W1 of the first light dimming sub-part 1421 and the central axis W2 of the second light dimming sub-part 1422 are coincidentally arranged, and the width of the first light dimming sub-part 1421 is greater than the width of the second light dimming sub-part 1422, thereby reducing the local over-bright phenomenon caused by the over-concentration of too many second light rays L2 and making the second light ray L2 more uniform.

[0062] Specifically, within the first dimming region 1401, the first dimming sub - part 1421 and the second dimming sub - part 1422 are overlapped. When the second light ray L2 emits from the splicing slit 132, due to the geometric characteristics of the splicing slit 132 and the distribution of the light source, the light intensity near the central axis O1 of the splicing slit 132 is usually high, and bright lines or local over - brightness phenomena are likely to occur. In this embodiment, by laminating the first dimming sub - part 1421 and the second dimming sub - part 1422 within the first dimming region 1401, and making the central axis W1 of the first dimming sub - part 1421 coincide with the central axis W2 of the second dimming sub - part 1422, the transmittance of the region near the central axis W0 of the dimming part 142 (the first dimming region 1401) is relatively low. When the second light ray L2 enters the dimming part 142, part of the second light ray L2 will pass through the transparent substrate 141, the first dimming sub - part 1421, and the second dimming sub - part 1422 located within the first dimming region 1401. Through the synergistic effect of the first dimming sub - part 1421 and the second dimming sub - part 1422, the intensity of the second light ray L2 emitted near the central axis O1 of the splicing slit 132 is reduced.

[0063] Furthermore, the width of the second dimming sub - part 1422 is 70% - 90% of the width of the first dimming sub - part 1421, so that the first dimming sub - part forms a gradient - shaped light intensity adjustment layer by expanding the coverage area. Specifically, the difference between the width of the first dimming sub - part 1421 and the width of the second dimming sub - part 1422 is greater than or equal to 5 microns and less than or equal to 50 microns. By setting the width of the first dimming sub - part 1421 to be greater than the width of the second dimming sub - part 1422, the first dimming sub - part 1421 can cover a larger area and can better adjust and guide the light intensity.

[0064] Furthermore, at least part of the orthographic projection of the first dimming sub - part 1421 on the transparent substrate 141 does not overlap with the orthographic projection of the second dimming sub - part 1422 on the transparent substrate 141, and at least part of the first dimming sub - part 1421 is located within the second dimming region 1402. Thus, when the second light ray L2 enters the dimming part 142, part of the second light ray L2 only passes through the transparent substrate 141 and the first dimming sub - part 1421 located within the second dimming region 1402. Compared with the overlapping setting of the first dimming sub - part 1421 and the second dimming sub - part 1422 within the first dimming region 1401, only the first dimming sub - part 1421 is provided within the second dimming region 1402. Therefore, more of the second light ray L2 can be allowed to pass through, thereby ensuring that the brightness of other regions of the dimming part 142 is maintained within a uniform range.

[0065] It should be noted that the description that the dimming part 142 includes the first dimming sub - part 1421 and the second dimming sub - part 1422 is only for illustration, and the number of the dimming sub - parts in this embodiment is not specifically limited; in practical applications, more dimming sub - parts can be added according to specific optical requirements and the layout of the splicing slit 132 to achieve more precise light control; for example: in Figure 5 In it, the dimming part 142 further includes a third dimming sub - part 1423. The third dimming sub - part 1423 is arranged on the side of the second dimming sub - part 1422 away from the first dimming sub - part 1421. The central axis W3 of the third dimming sub - part 1423, the central axis W2 of the second dimming sub - part 1422, and the central axis W1 of the first dimming sub - part 1421 are coincidentally arranged. And the width of the third dimming sub - part 1423 is less than the width of the second dimming sub - part 1422. By adding the third dimming sub - part 1423, when the second light ray L2 passes through multiple dimming sub - parts, its intensity and distribution can be more precisely controlled.

[0066] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 ; where Figure 6 is the second structural schematic diagram of the second dimming layer provided by the embodiment of the present application.

[0067] In one embodiment, the central axis W0 of the dimming part 142 coincides with the central axis O1 of the splicing slit 132, so that the transmission path of the second light ray L2 entering the dimming part 142 from the splicing slit 132 remains consistent, avoiding the distortion or irregular distribution of the second light ray L2.

[0068] The dimming part 142 includes a first dimming area 1401 and a second dimming area 1402. The second dimming area 1402 is located on the side of the first dimming area 1401 away from the central axis W0 of the dimming part 142. The dimming part 142 includes a plurality of dimming units 1420. The plurality of dimming units 1420 can be sequentially arranged along the direction away from the central axis W0 of the dimming part 142. The dimming unit 1420 includes, but is not limited to, one of dot - like points, prisms, or cylindrical lenses; where, in this embodiment, the dimming unit 1420 is taken as an example of dot - like points for illustration. The diameter of the dimming unit 1420 is greater than or equal to 10 microns and less than or equal to 80 microns. Through the refraction / scattering effect of the dot - like points, the propagation path of the second light ray L2 can be adjusted, thereby optimizing the light - emitting angle and uniformity of the second light ray L2 and avoiding the sudden change in brightness at the splicing slit 132.

[0069] Furthermore, the number of dimming units 1420 per unit area in the second dimming region 1402 is less than that in the first dimming region 1401, thereby realizing a density gradient distribution of the dimming part 142 from the center to the edge, enabling the dimming part 142 to adjust the propagation direction and light-emitting angle of the second light L2 in the first dimming region 1401 and the second dimming region 1402.

[0070] Specifically, the number of dimming units 1420 per unit area in the first dimming region 1401 is relatively large, such that the first dimming region 1401 can serve as a high-density region of the dimming part 142. In the first dimming region 1401, through the high-density dimming units 1420, the second light L2 (usually collimated light) originally concentrated near the central axis of the splicing slit 132 is diffused to a wider angular range, making the light emitted from the first dimming region 1401 softer and more uniform, avoiding obvious bright lines or light spots in the subsequent display screen, and improving the stability of the display effect.

[0071] Meanwhile, the number of dimming units 1420 per unit area in the second dimming region 1402 is relatively small, such that the second dimming region 1402 can serve as a low-density region of the dimming part 142. The low-density design of the second dimming region 1402 allows some of the second light L2 to maintain its collimation characteristics, avoiding light efficiency loss caused by excessive diffusion, maintaining the effectiveness of the second light L2, and improving the uniformity of the second light L2.

[0072] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 and Figure 8 ; where Figure 7 is the second explosion schematic diagram of the backlight module provided by the embodiment of the present application; Figure 8 is the second structural schematic diagram of the first dimming layer provided by the embodiment of the present application.

[0073] In one embodiment, the dimming part 142 is disposed on the side of the splicing slit 132 away from the light-emitting component 11, and the dimming part 142 is in direct contact with the splicing slit 132, thereby saving the number and space of optical elements; meanwhile, the dimming part 142 can immediately control the propagation path, angle, and intensity of the second light L2 when the second light L2 passes through the splicing slit 132, thereby avoiding the concentration of the second light L2 at the splicing slit 132.

[0074] Furthermore, the dimming unit 142 is located on the light-emitting path of the splicing slit 132. The side of the dimming unit 142 close to the first dimming layer 13 is in direct contact with the light-emitting surface of the splicing slit 132, thereby eliminating the traditional air gap and avoiding the influence on the propagation path and brightness distribution of the second light ray L2 due to the optical path difference between the dimming unit 142 and the splicing slit 132. At the same time, by closely combining the dimming unit 142 with the splicing slit 132, the requirement for additional components is reduced, and the manufacturing complexity and cost of the backlight module 1 are lowered.

[0075] The orthographic projection of the dimming unit 142 on the first dimming layer 13 overlaps with the orthographic projection of the splicing slit 132 on the first dimming layer 13, so as to accurately align the edge of the dimming unit 142 with the edge of the splicing slit 132, enabling the dimming unit 142 to accurately guide the propagation path of the second light ray L2 and avoiding uneven brightness of the second light ray L2 or obvious bright line phenomenon caused by the offset between the position of the dimming unit 142 and the position of the splicing slit 132.

[0076] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 and Figure 8 ; In one embodiment, the material of the dimming unit 142 includes but is not limited to transparent ink. The transparent ink can be precisely deposited on the splicing slit 132 through screen printing technology. The dimming unit 142 includes a plurality of stacked dimming sub-units; among them, the structure of the dimming unit 142 including a plurality of stacked dimming sub-units has been described in detail in the above embodiment ( Figure 5 the embodiment shown), and will not be repeated here.

[0077] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 and Figure 8 ; In one embodiment, in another embodiment, the dimming unit 142 includes a plurality of dimming sub-units. The plurality of dimming sub-units can be sequentially arranged along the direction away from the central axis W0 of the dimming unit 142. The dimming sub-unit includes but is not limited to one of dot patterns, prisms or cylindrical lenses; among them, the structure of the dimming unit 142 including a plurality of dimming sub-units has been described in detail in the above embodiment ( Figure 6 the embodiment shown), and will not be repeated here.

[0078] Please combine Figure 1 , Figure 2 ,Figure 3 , Figure 4 and Figure 9 ; wherein, Figure 9 is a schematic structural diagram of the display module provided in the embodiment of the present application.

[0079] This embodiment provides a display module 100, the display module 100 includes a display panel 2, and the backlight module 1 in any of the above embodiments. The backlight module 1 is disposed on the backlight side of the display panel 2. The backlight module 1 serves as the backlight source of the display panel 2, and the display panel 2 is used to receive the backlight source.

[0080] It can be understood that the backlight module 1 has been described in detail in the above embodiments and will not be repeated here.

[0081] It should be noted that the display module 100 has a wide range of application scenarios, and corresponding display panel types and backlight technologies can be selected according to different requirements to meet the display needs of various terminal devices; for example: in specific applications, the display module 100 can be a liquid crystal display module for various display devices such as televisions, smartphones, tablet computers, laptop computers, in-vehicle display screens, etc.

[0082] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 10 ; wherein, Figure 10 is a schematic structural diagram of the display device provided in the embodiment of the present application; wherein, Figure 10 shows a complete optical path diagram of the first light emitted from the backlight module and reaching the imaging structure after reflection.

[0083] This embodiment provides a display device 200, the display device 200 includes the display module 100 in any of the above embodiments, and a reflection module 210; wherein, the display module 100 can be a head-up display module, and the display module 100 includes a display panel 2 and a backlight module 1; the backlight module 1 is disposed on the backlight side of the display panel 2. The backlight module 1 serves as the backlight source of the display panel 2, and the display panel 2 is used to receive the first light emitted by the backlight module 1. The first light passes through the display panel 2 and exits to the reflection module 210; the reflection module 210 is disposed on the light-emitting side of the display panel 2, and the reflection module 210 is used to reflect (adjust) the first light to a preset angle and form a reflected light to exit to the windshield 4 to form a virtual image.

[0084] Specifically, the display module 100 projects the display light (including key information such as vehicle speed) emitted by the display panel 2 onto the imaging area of the windshield 4 of the vehicle or other imaging windows. After the display light is reflected on the surface of the imaging structure, a virtual image is formed, enabling the driver to directly obtain the required information without looking down at the dashboard during driving. It should be noted that in this embodiment, the imaging area is not specifically limited and can be located at any appropriate position on the windshield or other transparent windows to achieve the effect of information projection, thereby improving the convenience and safety of driving.

[0085] It can be understood that the backlight module 1 has been described in detail in the above embodiments and will not be repeated here.

[0086] Specifically, the display panel 2 includes, but is not limited to, a liquid crystal display panel (Liquid Crystal Display, LED); the reflection module 210 includes a first reflector 211 and a second reflector 212. The first reflector 211 is disposed on the light-emitting path of the display panel 2 to reflect the display light and form a first reflected light for emission. The second reflector 212 is disposed on the emission path of the first reflected light to reflect the first reflected light and form a second reflected light for emission onto the windshield 4 to form a virtual image.

[0087] The first reflector 211 can be a plane mirror. The plane mirror has a simple structure, can efficiently reflect the display light, and does not introduce additional distortion. The second reflector 212 can be a curved mirror. By changing the reflection angle of the first reflected light, the second reflected light can be effectively focused on the target position to ensure that the virtual image is clearly and accurately displayed on the windshield 4.

[0088] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] The above has introduced in detail a backlight module and a display module provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A backlight module, characterized in that: include: A light-emitting component, used for emitting a first light, wherein the light-emitting component comprises a plurality of light-emitting units arranged at intervals; A first dimming layer is provided on the light emitting path of the light emitting component, the first dimming layer is used to receive the first light and form a second light to emit, the first dimming layer includes a plurality of lens units, one lens unit is provided corresponding to one light emitting unit, and a splicing slit is provided between two adjacent lens units; The second dimming layer is arranged on the light output path of the first dimming layer, and the second dimming layer includes a plurality of dimming parts, one of the dimming parts covers one of the splicing slits, and the dimming part is used to control the intensity or light output angle of the second light emitted by the splicing slit.

2. The backlight module according to claim 1, characterized in that: The central axis of the dimming unit is arranged to coincide with the central axis of the splicing slit; The dimming part includes a first dimming zone and a second dimming zone, the second dimming zone is located on a side of the first dimming zone away from the central axis of the dimming part, and the total transmittance of the film layer of the second dimming zone is greater than the total transmittance of the film layer of the first dimming zone.

3. The backlight module according to claim 2, characterized in that: The light transmittance of the light modulating part is greater than or equal to 40% and less than or equal to 80%.

4. The backlight module according to claim 2, characterized in that: The dimming section includes a first dimming sub-section and a second dimming sub-section, the second dimming sub-section is located on a side of the first dimming sub-section away from the first dimming layer, the central axis of the first dimming sub-section and the central axis of the second dimming sub-section are arranged to coincide, and the width of the first dimming sub-section is greater than the width of the second dimming sub-section.

5. The backlight module according to claim 4, characterized in that: The width of the second light modulating sub-unit is 70% to 90% of the width of the first light modulating sub-unit.

6. The backlight module according to claim 1, characterized in that: The central axis of the dimming unit is arranged to coincide with the central axis of the splicing slit, the dimming unit comprises a first dimming area and a second dimming area, and the second dimming area is located on a side of the first dimming area away from the central axis of the dimming unit; The dimming unit includes a plurality of dimming cells, and the number of dimming cells per unit area in the second dimming zone is less than the number of dimming cells per unit area in the first dimming zone.

7. The backlight module according to claim 6, characterized in that: The diameter of the dimming unit is greater than or equal to 10 micrometers and less than or equal to 80 micrometers.

8. The backlight module according to any one of claims 1 to 7, characterized in that: The second dimming layer includes a transparent substrate, and the transparent substrate covers the first dimming layer; wherein the dimming unit is arranged on one side of the transparent substrate.

9. The backlight module according to any one of claims 1 to 7, characterized in that: The dimming part is arranged on a side of the splicing slit away from the light emitting component, and the dimming part is in direct contact with the splicing slit.

10. A display module, characterized in that: include: Display panel; A backlight module is provided on a side of the display panel backlight, and the backlight module is the backlight module according to any one of claims 1 to 9.

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