Light-emitting module, assembling method and display device

Abstract

A light emitting module (40) comprises a substrate (410), a plurality of light emitting devices (420), an optical film (G) and a reflective structure (440). The plurality of light emitting devices (420) are disposed on the substrate (410) and configured to emit light toward a side away from the substrate (410). The optical film (G) is provided on a side of the plurality of light emitting devices (420) away from the substrate (410). The light reflecting structure (440) is arranged on the optical film (G), and the light reflecting structure (440) comprises a plurality of light reflecting units (441). The light reflecting unit (441) comprises a first light reflecting pattern (4411) and at least one second light reflecting pattern (4412), and at least one part of the first light reflecting pattern (4411) is arranged around the at least one second light reflecting pattern (4412); the reflectivity of the second reflective pattern (4412) is greater than or equal to the reflectivity of the first reflective pattern (4411). Wherein the orthographic projection of the second reflective pattern (4412) on the substrate (410) and the orthographic projection of the light-emitting device (420) on the substrate (410) have an overlapping region, and the second reflective pattern (4412) is configured to reflect light emitted by the light-emitting device (420); the first reflective pattern (4411) is configured to reflect light emitted by the light emitting device (420).

Description

Light-emitting module, assembly method, and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a light-emitting module and an assembly method, and a display device. Background Art

[0002] A display device (e.g., a liquid crystal display device) includes a display module (e.g., a liquid crystal display module) and a backlight module, with the backlight module being disposed on the non-display side of the liquid crystal display module. The backlight module may include a light-emitting device that provides backlight to the non-display side of the liquid crystal display panel. Wherein, if the light-emitting device is, for example, a submillimeter light-emitting diode (Mini Light Emitting Diode, or Mini LED), the display device has advantages in terms of dynamic range, contrast, brightness, color range, and viewing angle, such as high color gamut, high image quality, low power consumption, and energy saving. Therefore, the market for Mini LED display devices is relatively good.

[0003] Summary of the Invention

[0004] In one aspect, a light-emitting module is provided. The light-emitting module includes a substrate, a plurality of light-emitting devices, an optical film, and a reflective structure. The plurality of light-emitting devices are disposed on the substrate and are configured to emit light toward a side away from the substrate. The optical film is disposed on a side of the plurality of light-emitting devices away from the substrate. The reflective structure is disposed on the optical film and includes a plurality of reflective units. The reflective units include: a first reflective pattern and at least one second reflective pattern, at least a portion of the first reflective pattern being disposed around the at least one second reflective pattern; the reflectivity of the second reflective pattern being greater than or equal to the reflectivity of the first reflective pattern. The orthographic projection of the second reflective pattern on the substrate overlaps with the orthographic projection of the light-emitting device on the substrate, and the second reflective pattern is configured to reflect light emitted by the light-emitting device; and the first reflective pattern is configured to reflect light emitted by the light-emitting device.

[0005] A portion of the light emitted by the light-emitting device is reflected by the reflective structure and propagates toward the substrate. It is then reflected by the substrate and propagates to both the light-projection area and the dark-projection area, increasing the brightness of the dark-projection area. Furthermore, another portion of the light emitted by the light-emitting device is transmitted through the reflective structure to the light-projection area. This ensures that the brightness of the light emitted by the light-emitting module is roughly uniform, thus resolving the problem of uneven brightness of the light emitted by the light-emitting module.

[0006] The orthographic projection of the second reflective pattern on the substrate overlaps with the orthographic projection of the light-emitting device on the substrate. This causes the light-emitting device to emit light with a relatively high intensity and illuminate the second reflective pattern, forming reflected light (referred to as the first reflected light); and the light-emitting device to emit light with a relatively low intensity and illuminate the first reflective pattern, forming reflected light (referred to as the second reflected light). The reflectivity of the first reflective pattern is greater than the reflectivity of the second reflective pattern. This causes the second reflective pattern to reflect more light emitted by the light-emitting device, while the first reflective pattern reflects less light emitted by the light-emitting device. In this way, a first reflected light with a relatively high intensity and a relatively large amount can be formed on the second reflective pattern; a second reflected light with a relatively low intensity and a relatively small amount can be formed on the first reflective pattern. The first reflected light and the second reflected light can propagate to the light projection area and the dark projection area, increasing the brightness of the dark projection area. Compared to a case where the reflectivity of the reflective structure is uniform everywhere, the embodiments of the present disclosure can achieve better uniformity in the brightness of the dark projection area and the light projection area.

[0007] Optionally, the transmittance of the second light-reflecting pattern is less than the transmittance of the first light-reflecting pattern.

[0008] Optionally, the light emitting module has multiple light projection areas; the light projection area is an area within the plane where the reflective structure is located that is illuminated by light emitted by a light emitting device. The second reflective pattern is located within the light projection area, and at least a portion of the first reflective pattern is located within the light projection area.

[0009] Optionally, the second reflective pattern covers a geometric center of gravity area of ​​the light projection area.

[0010] Optionally, the reflective unit includes a second reflective pattern; in the reflective unit, the first reflective pattern is located in the light projection area.

[0011] Optionally, the reflective unit includes multiple second reflective patterns; in the reflective unit, the first reflective pattern includes multiple first parts and second parts; the first part is located within the light projection area and is arranged around the second luminous pattern; the second part is located outside the light projection area and is connected to the multiple first parts.

[0012] Optionally, the first light-reflecting pattern has at least one hollow area, and the second light-reflecting pattern is arranged in the hollow area.

[0013] Optionally, the first reflective pattern and the second reflective pattern are stacked; wherein the second reflective pattern is closer to the substrate than the first reflective pattern. The first reflective pattern includes a first portion and a second portion; the orthographic projection of the first portion on the substrate coincides with the orthographic projection of the second reflective pattern on the substrate; and the second portion is located outside the second reflective pattern and is arranged around the first portion.

[0014] Optionally, the first light-reflecting pattern includes a first central portion and a plurality of first radiating portions, the first central portion is arranged around the second light-reflecting pattern, and the plurality of first radiating portions are arranged along the circumference of the first central portion.

[0015] Optionally, the number of the plurality of first radiation portions is greater than or equal to five.

[0016] Optionally, the reflectivity of the first central portion is greater than or equal to the reflectivity of the first radiating portion.

[0017] Optionally, the second light-reflecting pattern includes a second central portion and a plurality of second radiating portions, and the plurality of second radiating portions are arranged along the circumference of the second central portion.

[0018] Optionally, the reflectivity of the second central portion is greater than or equal to the reflectivity of the second radiating portion.

[0019] Optionally, the first reflective pattern includes a plurality of first radiating portions; the number of the plurality of first radiating portions is equal to the number of the plurality of second radiating portions; and the extending direction of the first radiating portions coincides with the extending direction of the plurality of second radiating portions.

[0020] Optionally, the light-emitting device has a first edge extending along the first direction and a second edge extending along the second direction. In the reflective unit, at least one second reflective pattern is distributed in an n*m array; n is the number of second reflective patterns included in each row in the first direction and is greater than or equal to 1; m is the number of second reflective patterns included in each column in the second direction and is greater than or equal to 1. The length L of the reflective unit in the first direction and the width W of the reflective unit in the second direction satisfy the following formula: L = nL1 + 2h tan(θ-90°) + (n-1)L3 + δ l2 ; W=mW1+2h tan(θ-90°)+(m-1)W3+δw2.

[0021] Wherein, L1 is the length of the light-emitting device in the first direction, W1 is the width of the light-emitting device in the second direction; h is the height between the light-emitting device and the plane where the reflective structure is located; θ is the light-emitting angle of the light-emitting device; L3 is the length between adjacent light-emitting devices in the first direction, W3 is the width between adjacent light-emitting devices in the second direction; δ 12 and δ w2 is a constant.

[0022] Optionally, the first reflective pattern includes a first central portion and a plurality of first radiating portions; the first radiating portion has an end portion and a root portion, the root portion is disposed on the first central portion, and the end portion is an end of the root portion facing away from the first central portion. The length L4 of the first central portion in the first direction and the width W4 of the first central portion in the second direction satisfy the following formula:

[0023] The length L5 of the second light-reflecting pattern in the first direction and the width W5 of the second light-reflecting pattern in the second direction satisfy the following formula:

[0024] In the first radiating portion, the length δ from the end portion to the root along the first direction is l4 and the width δ from the end portion to the root portion along the second direction W4 Satisfies the following formula: δ l4 =(L-L4) / 2; δ W4 =(W-W4) / 2.

[0025] Optionally, the outer edge of the first light-reflecting pattern is elliptical or circular, and the outer edge of the first light-reflecting pattern is an edge of the first light-reflecting pattern away from the second light-reflecting pattern.

[0026] Optionally, the second light-reflecting pattern is elliptical or circular in shape.

[0027] Optionally, the brightness of the plurality of light-emitting devices can be independently controlled; the reflective unit includes: a first reflective pattern and a second reflective pattern, and at least a portion of the first reflective pattern is arranged around the second light-emitting pattern.

[0028] Optionally, the multiple light-emitting devices are divided into multiple device groups, each device group including K light-emitting devices connected in series, where K is greater than 2. One device group corresponds to one reflective unit; the reflective unit includes a first reflective pattern and K second reflective patterns, with at least a portion of the first reflective pattern arranged around the K second light-emitting patterns; wherein an orthographic projection of each second reflective pattern in the reflective unit on the substrate overlaps with an orthographic projection of a light-emitting device in the corresponding device group on the substrate.

[0029] Optionally, the multiple light-emitting devices are divided into multiple device groups, each device group including K light-emitting devices connected in series, where K is greater than 2. One device group corresponds to K reflective units; the reflective unit includes a first reflective pattern and a second reflective pattern, with at least a portion of the first reflective pattern disposed around the second light-emitting pattern; wherein an orthographic projection of the second reflective pattern included in each of the K reflective units on the substrate overlaps with an orthographic projection of a light-emitting device in the corresponding device group on the substrate.

[0030] Optionally, the reflective structure is arranged on a side of the optical film close to the substrate.

[0031] Optionally, the density of the first light-reflecting pattern is less than or equal to the density of the second light-reflecting pattern.

[0032] Optionally, the thickness of the first light-reflecting pattern is less than or equal to the thickness of the second light-reflecting pattern.

[0033] Optionally, the first reflective pattern is a first ink, and the second reflective pattern is a second ink.

[0034] Optionally, the optical film is a diffusion film or a light-uniform film.

[0035] Optionally, the first reflective pattern includes multiple first sub-reflective patterns, and the multiple first sub-reflective patterns are sequentially arranged around the second reflective pattern; wherein, along the direction from the second reflective pattern to the first reflective pattern, the transmittance of the multiple first sub-reflective patterns decreases sequentially.

[0036] Optionally, the second reflective pattern includes a second sub-reflective pattern and at least one third sub-reflective pattern; the at least one third sub-reflective pattern is sequentially arranged around the second sub-reflective pattern; wherein, along the direction of the second reflective pattern pointing to the first reflective pattern, the transmittance of the second sub-reflective pattern and the at least one third sub-reflective pattern decreases sequentially.

[0037] Optionally, the first reflective pattern includes a plurality of first sub-reflective patterns, which are sequentially arranged around a circle of the second reflective pattern; wherein, along the direction from the second reflective pattern to the first reflective pattern, the transmittance of the plurality of first sub-reflective patterns decreases sequentially. The second reflective pattern includes a second sub-reflective pattern and at least one third sub-reflective pattern; wherein, along the direction from the second reflective pattern to the first reflective pattern, the transmittance of the second sub-reflective pattern and the at least one third sub-reflective pattern decreases sequentially.

[0038] Optionally, the reflectivity of the second reflective pattern is 80% to 90%.

[0039] Optionally, the reflectivity of the first reflective pattern is 30% to 40%.

[0040] Optionally, the reflectivity of the second reflective pattern is 80% to 90%, and the reflectivity of the first reflective pattern is 30% to 40%.

[0041] On the other hand, a method for assembling a light-emitting module is provided, the method comprising: arranging a plurality of light-emitting devices on a substrate; the plurality of light-emitting devices are configured to emit light toward a side away from the substrate. An optical film is arranged on a side of the plurality of light-emitting devices away from the substrate. A reflective structure is arranged on the optical film; the reflective structure includes a plurality of reflective units; the reflective unit includes: a first reflective pattern and at least one second reflective pattern, at least a portion of the first reflective pattern is arranged around the at least one second reflective pattern; the reflectivity of the second reflective pattern is greater than the reflectivity of the first reflective pattern. The orthographic projection of the second reflective pattern on the substrate and the orthographic projection of the light-emitting device on the substrate have an overlapping area, and are configured to reflect the light emitted by the light-emitting device; the first reflective pattern is configured to reflect the light emitted by the light-emitting device. The effects of the method for assembling the light-emitting module can be referred to the relevant description of the effects of the light-emitting module, and will not be repeated here.

[0042] Optionally, before forming the reflective structure on the optical film, the method for assembling the light-emitting module further includes: determining the shape of each second reflective pattern and the shape of the first reflective pattern in the reflective unit. The size of the second reflective pattern and the size of the first reflective pattern are determined based on the shape of the second reflective pattern and the shape of the first reflective pattern, as well as the length L1 of the light-emitting device in the first direction, the width W1 of the light-emitting device in the second direction, the height h between the light-emitting device and the plane where the reflective structure is located, the light-emitting angle θ of the light-emitting device, the length L3 between adjacent light-emitting devices in the first direction, and the width W3 between adjacent light-emitting devices in the second direction. A first mesh plate comprising a plurality of first meshes and a second mesh plate comprising a plurality of second meshes is provided; wherein the shape and size of the first meshes are determined based on the shape and size of the first reflective pattern; and the shape and size of the second meshes are determined based on the shape and size of the second reflective pattern.

[0043] The step of forming a reflective structure on the optical film includes: using multiple first meshes of a first screen to form multiple first reflective patterns on the optical film; using multiple second meshes of a second screen to form multiple second reflective patterns on the optical film.

[0044] On the other hand, a display device is provided. The display device includes the above-mentioned light-emitting module. Therefore, the display device has the same effect as the light-emitting module, and no further details are given. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0046] FIG1 is a structural diagram of a display device according to some embodiments;

[0047] FIG2 is a structural diagram of a light-emitting module (without adding a reflective structure) according to some embodiments;

[0048] FIG3 is a simulation diagram of a light projection area according to some embodiments;

[0049] FIG4A is a structural diagram of a light-emitting module (with an added reflective structure) according to some embodiments;

[0050] FIG4B is a structural diagram of another light-emitting module (with an additional reflective structure) according to some embodiments;

[0051] FIG5A is a pictorial diagram of a reflective structure according to some embodiments;

[0052] FIG5B is a structural diagram of a light reflecting unit according to some embodiments;

[0053] FIG6 is a cross-sectional view taken along AA in FIG5B;

[0054] FIG7 is another cross-sectional view along AA in FIG5B;

[0055] FIG8 is a structural diagram of the light-emitting module in the comparative solution;

[0056] FIG9 is a structural diagram of a reflective unit according to some embodiments;

[0057] FIG10A is a structural diagram of another light-reflecting unit according to some embodiments;

[0058] FIG10B is a structural diagram of another light-reflecting unit according to some embodiments;

[0059] FIG11 is a structural diagram of a reflective unit and an optical film according to some embodiments;

[0060] FIG12 is a structural diagram replacing the Q in FIG4A;

[0061] FIG13 is an enlarged view of point P in FIG12 ;

[0062] FIG14 is a structural diagram of another light reflecting unit according to some embodiments;

[0063] FIG15 is a structural diagram replacing the Q in FIG4A;

[0064] FIG16 is a structural diagram of another light-reflecting unit according to some embodiments;

[0065] FIG17 is a structural diagram replacing the Q in FIG4A;

[0066] FIG18 is a structural diagram of a plurality of light-reflecting units according to some embodiments;

[0067] FIG19 is a structural diagram of another plurality of reflective units according to some embodiments;

[0068] FIG20 is a flow chart of a method for assembling a light emitting module according to some embodiments;

[0069] FIG21 is a structural diagram of a first reflective pattern prepared using a first screen;

[0070] FIG22 is a structural diagram of preparing a second reflective pattern using a second screen. DETAILED DESCRIPTION

[0071] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0072] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0073] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0074] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0075] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0076] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0077] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0078] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0079] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0080] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0081] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0082] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0083] Some embodiments of the present disclosure provide a display device. The display device 1 is a product having an image (including a static image or a dynamic image, wherein the dynamic image may be a video) display function. The display device 1 may be, for example: a virtual reality (VR) display device, an augmented reality (AR) display device, a display, a mobile phone (Mobile Phone), a tablet computer (Pad), a laptop computer, a television, a personal digital assistant (PDA), an ultra-mobile personal computer (UMPC), a netbook, a wearable device (such as a smart watch), or a vehicle-mounted display device 1, etc. This embodiment does not limit the type of the display device 1.

[0084] FIG. 1 is a structural diagram of a display device according to some embodiments.

[0085] 1 , a display device 1 may include a display panel 20. The display panel 20 has a display side SA and a non-display side AA opposite to each other. The display side SA is a side of the display panel capable of displaying an image, while the non-display side AA is a side opposite to the display side SA.

[0086] The display panel 20 is configured to receive a data signal (eg, a voltage signal) and display an image (ie, a picture) on the display side SA based on the data signal.

[0087] Exemplarily, the display panel 20 includes a plurality of sub-pixels located in the display area AA. The plurality of sub-pixels include a first sub-pixel for emitting a first color light, a second sub-pixel for emitting a second color light, and a third sub-pixel for emitting a third color light. The first color, the second color, and the third color are three primary colors (e.g., red, green, and blue). Exemplarily, the display panel may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

[0088] The display panel 20 also includes multiple signal lines, such as multiple gate lines and multiple data lines. Each sub-pixel can be coupled to a gate line and a data line, and is configured to write a data signal transmitted by the data line in response to a scan signal transmitted by the gate line; and emit light with a corresponding intensity based on the data signal.

[0089] A plurality of gate lines may extend roughly along a first direction. In some examples, a gate line may be parallel to the first direction. As another example, a gate line may extend in a direction with a smaller angle to the first direction. For example, the smaller angle has a value range of -8° to 8°, or -5° to 5°. Hereinafter, the smaller angle described may refer to the value range of the angle and be adaptively selected within the value range. One (for example, each) gate line may be coupled to sub-pixels in the same row and configured to transmit a scan signal to the sub-pixels in the row. As an example, the gate line is located in the display area AA and may also extend into the non-display area SA.

[0090] In some examples, the display panel 20 may further include a gate drive circuit located in the non-display area. In this case, the gate drive circuit may be referred to as a GOA (Gate On Array) circuit. The gate drive circuit is coupled to a plurality of data lines and is configured to provide a scan signal to the gate lines. For example, the gate drive circuit may be provided on one side (e.g., the left or right side) of the display area along the first direction. In other examples, the gate drive circuit may be a gate drive chip that is not included in the display panel 20 but is coupled to a plurality of gate lines in the display panel 20.

[0091] The plurality of data lines may extend substantially along a second direction, wherein the second direction is perpendicular to the first direction. For example, a data line may be parallel to the second direction. In some examples, a data line may also have a small angle with the second direction. One (e.g., each) data line may be coupled to sub-pixels in the same column and configured to provide data signals to the sub-pixels in the column. For example, the data line is located in the display area AA and may also extend into the non-display area SA.

[0092] The display module may further include a driver chip, specifically a driver IC, such as a source driver IC or a display driver integrated circuit (DDIC). The driver chip is coupled to the display panel 20, for example, it may be bound to the non-display area SA of the display panel 20. The driver chip is configured to provide corresponding data signals to the display panel 20 based on received image data. In some examples, the driver chip is coupled to multiple data lines and is configured to provide data signals to the data lines.

[0093] For the convenience of description, a rectangular coordinate system may be established with the first direction and the second direction as two axes perpendicular to each other.

[0094] In some embodiments, the display device 1 further includes a light-emitting module 40. The light-emitting module 40 is a product capable of emitting light or a component of a light-emitting product. In some possible implementations, the light-emitting module 40 can be used for lighting, such as a light panel or backlight module. In other possible implementations, the light-emitting module 40 can be used to display images, such as a decorative wall or traffic light.

[0095] Wherein, the display panel 20 can be, for example, a liquid crystal display panel, and the corresponding display module is a liquid crystal display module. Since the liquid crystal display panel 20 itself cannot emit light, the light-emitting module 40 is located on the non-display side AA of the display panel 20 and is configured to provide backlight to the liquid crystal display panel 20. In this case, the light-emitting module 40 can be called a backlight module; that is, the display device including the backlight module and the liquid crystal display module can be called a liquid crystal display device. When the display panel 20 is a liquid crystal display panel, the liquid crystal display device 1 also includes a first polarizer 10 (also called an upper polarizer) attached to the display side SA of the liquid crystal display panel, and a second polarizer 30 (also called a lower polarizer) attached to the non-display side AA of the liquid crystal display panel 20. The polarization direction of the first polarizer 10 is perpendicular to the polarization direction of the second polarizer 30.

[0096] The embodiment of the present disclosure provides a light emitting module 40 , which may include a substrate 410 , an optical film G, and a plurality of light emitting devices 420 .

[0097] The substrate 410 can be configured according to actual needs.

[0098] For example, substrate 410 may be a rigid substrate. The rigid substrate may be made of glass or PMMA (Poly Methyl Meth Acrylate). Substrate 410 may also be a flexible substrate. The flexible substrate may be made of PET (Poly Ethylene Terephthalate), PEN (Poly Ethylene Naphthalate Two Formic Acid Glycol Ester), ultra-thin glass, or PI (Polyimide). If substrate 410 is a flexible substrate, then the light-emitting module 40 may be a flexible light-emitting module 40 and applied to a curved display device.

[0099] The light-emitting device 420 is a device that can emit light after being powered on. For example, the light-emitting device 420 can be an LED, a micro-LED, an OLED (Quantum Dot Light Emitting Diodes), etc., and is not limited here. As an example, the light-emitting device 420 can be a micro light-emitting device, and the size of the micro light-emitting device can refer to the size of a micro-LED. Micro-LEDs include submillimeter or even micron-sized light-emitting diodes, and can also include light-emitting diodes of smaller sizes. Among them, submillimeter-sized light-emitting diodes are also called submillimeter light-emitting diodes (Mini Light Emitting Diode, Mini LED); the size (e.g., length) of a Mini LED can be 50 microns to 150 microns, such as 80 microns to 120 microns, or 100 microns or less. Micron-sized light-emitting diodes are also called micro light-emitting diodes (Micro Light Emitting Diode, Micro LED); for example, the size (e.g., length) of a Micro LED can be less than 50 microns, such as 10 microns to 50 microns.

[0100] A plurality of light-emitting devices 420 are disposed on the substrate 410. For example, the plurality of light-emitting devices 420 are disposed on the upper surface of the substrate 410 as shown in FIG2 . The plurality of light-emitting devices 420 are configured to emit light toward a side away from the substrate 410. For example, the plurality of light-emitting devices 420 are configured to emit light toward the non-display side AA of the display panel 20 as shown in FIG1 .

[0101] The optical film G is disposed on a side of the plurality of light emitting devices 420 away from the substrate 410 so that the brightness of the light emitted by the light emitting devices 420 becomes more uniform after passing through the optical film G.

[0102] Exemplarily, the light-emitting module 40 may further include a quantum dot film 430, a diffusion film 450, a light-homogenizing film 460, and a brightness-enhancing film 470. The quantum dot film 430, the diffusion film 450, the light-homogenizing film 460, and the brightness-enhancing film 470 are sequentially stacked on the side of the light-emitting device 420 away from the substrate 410. In some examples, the quantum dot film 430, the diffusion film 450, the light-homogenizing film 460, and the brightness-enhancing film 470 may all be a single piece, which facilitates the development of the light-emitting module 40 towards a lighter and thinner structure. In some examples, the quantum dot film 430, the diffusion film 450, the light-homogenizing film 460, and the brightness-enhancing film 470 may all be multiple pieces.

[0103] In some examples, the optical film G may be the diffusion film 450 shown in FIG2 . In other examples, the optical film G may also be a light uniforming film 460 .

[0104] Light emitted by the light-emitting device 420 propagates toward the side facing away from the substrate 410, onto the optical film G, and then continues to propagate toward the side facing away from the substrate 410 through the optical film G, allowing the light-emitting module 40 to emit light. Continuing with FIG2 , the light-emitting module 40 has multiple light projection areas GQ. A light projection area GQ is the area within the plane of the reflective structure 440, as described below, illuminated by light emitted by a light-emitting device 420. It can be understood that a light projection area can be the area on the optical film G or the brightness enhancement film 470 illuminated by light emitted by a light-emitting device 420. In some examples, as shown in FIG3 , the luminous intensity within the light projection area GQ gradually decreases from the geometric center GQ1 of the light projection area GQ toward the outer edge GQ2 of the light projection area GQ. For example, the luminous intensity at the outer edge GQ2 of the light projection area GQ is zero. The geometric center GQ1 can be understood as the area on the optical film G or the brightness enhancement film 470 illuminated by light emitted by the light-emitting device 420 within the light projection area GQ, where the light has the highest intensity. In some examples, the light projection area GQ may be a regular shape, for example, the regular shape may be an ellipse, a rectangle, etc., which is not limited here.

[0105] However, there is a dark projection area AQ between adjacent light projection areas GQ. Due to the different brightness of the light projection area GQ and the dark projection area AQ, the light emitted by the light-emitting module is uneven, resulting in light shadows on the screen displayed by the LCD panel, affecting the picture quality.

[0106] To solve the problem of uneven brightness of the light emitted by the light emitting module 40, as shown in FIG4A , the light emitting module 40 further includes a reflective structure 440. The reflective structure 440 is configured to reflect the light emitted by the light emitting device 420. In some examples, the reflective structure 440 is also configured to transmit the light emitted by the light emitting device 420.

[0107] The reflective structure 440 is disposed on the optical film G. In some examples, the reflective structure 440 is disposed on a side of the optical film G close to the substrate 410 as shown in FIG4A ; for example, the reflective structure 440 is disposed on a side of the diffusion film 450 close to the substrate 410 as shown in FIG4A . In other examples, the reflective structure 440 is disposed on a side of the optical film G away from the substrate 410. In other examples, the reflective structure 440 is disposed inside the optical film G as shown in FIG4B . For example, the reflective structure 440 can be disposed inside the diffusion film 450 as shown in FIG4B , so that the light transmittance of the portion of the diffusion film 450 where the reflective structure 440 is disposed is less than the light transmittance of the portion of the diffusion film 450 where the reflective structure 440 is not disposed, that is, the unit light intensity of the portion of the diffusion film 450 where the reflective structure 440 is disposed is less than the unit light intensity of the portion of the diffusion film 450 where the reflective structure 440 is not disposed. Therefore, compared with the portion of the diffusion film 450 without the reflective structure 440 , the diffusion effect of the portion of the diffusion film 450 with the reflective structure 440 is weakened; and the thickness of the light-emitting module 40 can also be reduced.

[0108] In this way, a portion of the light emitted by the light-emitting device 420 is reflected by the reflective structure 440 and propagates toward the substrate 410. It is then reflected by the substrate 410 and propagates to the light-projection area GQ and the dark-projection area AQ shown in FIG2 , thereby increasing the brightness of the dark-projection area AQ shown in FIG2 . Furthermore, another portion of the light emitted by the light-emitting device 420 is transmitted through the reflective structure 440 to the light-projection area GQ, ensuring that the brightness of the light emitted by the light-emitting module 40 is substantially uniform, thereby resolving the problem of uneven brightness of the light emitted by the light-emitting module 40.

[0109] FIG5A is a structural diagram of a reflective structure 440 according to some embodiments. The reflective unit 441 shown in FIG5A is the reflective unit 441 described in Example 2 below. Of course, the reflective unit 441 shown in FIG5A is not limited to the reflective unit 441 described in Example 2 below. For example, the reflective unit 441 shown in FIG5A can also be replaced with the reflective unit 441 described in Example 1 below; details will not be given here. FIG5B is a structural diagram of a reflective unit 441 according to some embodiments. The reflective unit 441 shown in FIG5B is the reflective unit 441 described in Example 1 below. Of course, the reflective unit 441 shown in FIG5B is not limited to the reflective unit 441 described in Example 1 below. For example, the reflective unit 441 shown in FIG5B can also be replaced with the reflective unit 441 described in Example 2 below; details will not be given here.

[0110] Referring to FIG. 5A , a reflective structure 440 includes a plurality of reflective units 441. In some examples, the plurality of reflective units 441 are interconnected. For example, a row of reflective units 441 may be connected, and a column of reflective units 441 may be connected. A row of reflective units 441 may be a plurality of reflective units 441 arranged along a first direction, and a column of reflective units 441 may be a plurality of reflective units 441 arranged along a second direction.

[0111] 5B , each reflective unit 441 includes a first reflective pattern 4411 and at least one (e.g., one or more) second reflective pattern 4412. The first reflective pattern 4411 and the second reflective pattern 4412 are both configured to reflect light emitted by the light-emitting device 420 to form reflected light, which is then reflected onto the optical film G through the substrate 410.

[0112] 5B , at least a portion of the first light-reflecting pattern 4411 is disposed around at least one (eg, one, or more) second light-reflecting pattern 4412 .

[0113] Illustratively, the first light-reflecting pattern 4411 is arranged around at least one (e.g., one, or more) second light-reflecting pattern 4412. In some examples, referring to FIG6 , the first light-reflecting pattern 4411 is arranged around one second light-reflecting pattern 4412. In other examples, the first light-reflecting pattern 4411 is arranged around multiple (e.g., four) second light-reflecting patterns 4412.

[0114] Referring to FIG6 , the first reflective pattern 4411 has at least one (e.g., one or more) hollowed-out area 4411a, and the second reflective pattern 4412 is disposed within the hollowed-out area 4411a. Thus, the first reflective pattern 4411 and the second reflective pattern 4412 are disposed in the same layer, making the reflective unit 441 relatively thin, thereby avoiding increasing the thickness of the light-emitting module 40 and facilitating the trend toward thinner and lighter products such as the display panel 20. In the reflective unit 441, the number of hollowed-out areas 4411a is equal to the number of second reflective patterns 4412. For example, the number of hollowed-out areas 4411a and the number of second reflective patterns 4412 can each be one, four, six, nine, or the like. In some examples, referring again to FIG6 , the first reflective pattern 4411 has one hollowed-out area 4411a, and one second reflective pattern 4412 is disposed within one hollowed-out area 4411a. In some other examples, the first light-reflecting pattern 4411 has a plurality (for example, four) of hollow areas 4411 a , and a plurality (for example, four) of second light-reflecting patterns 4412 are disposed in the plurality (for example, four) of hollow areas 4411 a .

[0115] In one possible implementation, the hollow area 4411a and the second reflective pattern 4412 have the same shape. This means that the outline of the hollow area 4411a and the outline of the second reflective pattern 4412 have the same shape. For example, if the hollow area 4411a is elliptical, the second reflective pattern 4412 is also elliptical. In this embodiment, the shapes of the hollow area 4411a and the second reflective pattern 4412 are not limited.

[0116] As another example, referring to FIG. 7 , a first reflective pattern 4411 and a second reflective pattern 4412 are stacked. The second reflective pattern 4412 is positioned relative to the first reflective pattern 4411, closer to the substrate 410 shown in FIG. 4A . A portion of the first reflective pattern 4411 surrounds at least one (e.g., one, or more) second reflective patterns 4412, and an orthographic projection of another portion of the first reflective pattern 4411 on the substrate coincides with an orthographic projection of at least one (e.g., one, or more) second reflective pattern 4412 on the substrate. In some examples, the first reflective pattern 4411 includes a first sub-portion ZB1 and a second sub-portion ZB2; the orthographic projection of the first sub-portion ZB1 on the substrate 410 coincides with the orthographic projection of the second reflective pattern 4412 on the substrate; and the second sub-portion ZB2 is located outside the second reflective pattern 4412 and surrounds the first sub-portion ZB1.

[0117] Continuing with FIG4A , the orthographic projection of the second reflective pattern 4412 on the substrate 410 overlaps with the orthographic projection of the light-emitting device 420 on the substrate 410. This causes the light emitting device to emit light with relatively high intensity and illuminate the second reflective pattern 4412, forming reflected light (referred to as first reflected light); and the light emitting device to emit light with relatively low intensity and illuminate the first reflective pattern 4411, forming reflected light (referred to as second reflected light).

[0118] The reflectivity of the first reflective pattern 4411 is lower than that of the second reflective pattern 4412. This results in the second reflective pattern 4412 reflecting more light from the light-emitting device 420, while the first reflective pattern reflects less light from the light-emitting device 420. This results in a higher intensity and greater quantity of first reflected light being formed on the second reflective pattern 4412, while a lower intensity and less quantity of second reflected light being formed on the first reflective pattern 4411. The first and second reflected lights can propagate to the light projection area GQ and dark projection area AQ as shown in FIG2 , thereby increasing the brightness of the dark projection area AQ as shown in FIG2 . Compared to a case where the reflectivity of the reflective structure is uniform everywhere, the embodiments of the present disclosure can achieve greater brightness uniformity in the dark projection area AQ and the light projection area GQ as shown in FIG2 .

[0119] The reflectivity of the first reflective pattern 4411 is equal to the reflectivity of the second reflective pattern 4412. This results in a first reflected light with a higher intensity being formed on the second reflective pattern 4412, while a second reflected light with a lower intensity being formed on the first reflective pattern 4411. The first and second reflected lights can propagate to the light projection area GQ and dark projection area AQ as shown in Figure 2 , thereby increasing the brightness of the dark projection area AQ as shown in Figure 2 . Compared to a situation where the reflectivity of the reflective structure is uniform everywhere, the embodiments of the present disclosure can achieve greater brightness uniformity in the dark projection area AQ and the light projection area GQ as shown in Figure 2 .

[0120] The embodiment of the present disclosure also provides a comparative solution, see Figure 8. In the light-emitting module 40 provided by the comparative solution, by increasing the number of light-homogenizing films 460, the number of light-homogenizing films 460 is usually 3 to 5 (for example, the number of light-homogenizing films 460 shown in Figure 8 is 4), so as to solve the problem of uneven brightness of the light emitted by the light-emitting module 40. In contrast, the embodiment of the present disclosure sets a reflective structure 440 on the optical film G to solve the problem of uneven brightness of the light emitted by the light-emitting module 40. In this way, even if the number of light-emitting devices 420 in the light-emitting module is reduced (that is, the distance between adjacent light-emitting devices 420 is increased), the distance of the dark shadow area AQ is increased, and the light shadow of the display panel is more serious. However, the light-emitting module 40 in the embodiment of the present disclosure uses the reflective structure 440 to reflect the light emitted by the light-emitting device 420 to the dark shadow area AQ shown in Figure 2, so that the brightness uniformity of the light emitted by the light-emitting module 40 is better, thereby solving the problem of more serious light shadow on the display panel 20. At the same time, the number of layers of the light-homogenizing film 460 is not increased (ie, the number of the light-homogenizing film 460 is one), so that the thickness of the light-emitting module 40 is not increased, which is conducive to the development of the light-emitting module 40 towards lightness and thinness; and the manufacturing cost is also low.

[0121] In some examples, the orthographic projection of the light-emitting device 420 on the substrate 410 overlaps the orthographic projection of the second light-reflecting pattern 4412 on the substrate 410. For example, the orthographic projection of the light-emitting device 420 on the substrate 410 partially overlaps with the orthographic projection of the first light-reflecting pattern 4411 on the substrate 410. In other examples, the orthographic projection of the second light-reflecting pattern 4412 on the substrate 410 partially overlaps with the orthographic projection of the light-emitting device 420 on the substrate 410.

[0122] The material of the reflective structure 440 can be a material that can transmit and reflect (can be called a translucent material), and the translucent material can be, for example, ink, optical resin, latex paint, etc. In order to make the reflectivity of the first reflective pattern 4411 less than or equal to the reflectivity of the second reflective pattern 4412, several examples are provided below.

[0123] For example, the first reflective pattern 4411 is a first ink, and the second reflective pattern 4412 is a second ink. For example, the reflectivity of the first ink is lower than the reflectivity of the second ink. The second ink can be white ink, gray ink, etc., and the first ink can be black ink, etc. For another example, the reflectivity of the first ink is equal to the reflectivity of the second ink.

[0124] In another exemplary embodiment, the density of the first light-reflecting pattern 4411 is less than or equal to the density of the second light-reflecting pattern 4412. This can be understood as follows: the first light-reflecting pattern 4411 and the second light-reflecting pattern 4412 are coated with a light-transmitting material, and the coating density of the first light-reflecting pattern 4411 is less than or equal to the coating density of the second light-reflecting pattern 4412. In some examples, the reflectivity of the first ink is equal to the reflectivity of the second ink, and the density of the first light-reflecting pattern 4411 is less than or equal to the density of the second light-reflecting pattern 4412. In other examples, the reflectivity of the first ink is less than the reflectivity of the second ink, and the density of the first light-reflecting pattern 4411 is less than or equal to the density of the second light-reflecting pattern 4412.

[0125] As another example, the thickness of the first reflective pattern 4411 is less than the thickness of the second reflective pattern 4412; this can be understood as follows: along the thickness direction of the light-emitting module, the size of the first reflective pattern 4411 is less than the size of the second reflective pattern 4412. In some examples, the reflectivity of the first ink is equal to the reflectivity of the second ink, and the thickness of the first reflective pattern 4411 is less than or equal to the thickness of the second reflective pattern 4412. In other examples, the reflectivity of the first ink is less than the reflectivity of the second ink, and the thickness of the first reflective pattern 4411 is less than or equal to the thickness of the second reflective pattern 4412.

[0126] In one possible implementation, the first reflective pattern 4411 and the second reflective pattern 4412 may be made of the same ink; the density of the first reflective pattern 4411 is less than that of the second reflective pattern 4412; and the thickness of the first reflective pattern 4411 is less than that of the second reflective pattern 4412.

[0127] In another possible implementation, the first reflective pattern 4411 is a first ink, the second reflective pattern 4412 is a second ink, the reflectivity of the first ink is less than the reflectivity of the second ink; the density of the first reflective pattern 4411 is less than the density of the second reflective pattern 4412; the thickness of the first reflective pattern 4411 is less than the thickness of the second reflective pattern 4412.

[0128] In some embodiments, the outer edge of the first reflective pattern 4411 and the second reflective pattern 4412 may both be regular shapes. The outer edge of the first reflective pattern 4411 is the edge of the first reflective pattern 4411 away from the second reflective pattern 4412. Three examples of the first reflective pattern 4411 and the second reflective pattern 4412 are provided below.

[0129] Example 1:

[0130] 5B , the outer edge of the first light-reflecting pattern 4411 is in a regular shape such as an ellipse or a circle, and the shape of the second light-reflecting pattern 4412 is in an ellipse or a circle.

[0131] In some examples, when the shape of the first sub-portion ZB1 as shown in FIG7 or the hollow area 4411a as shown in FIG6 is elliptical, the corresponding second light-reflecting pattern 4412 is also elliptical. In other examples, when the shape of the first sub-portion ZB1 as shown in FIG7 or the hollow area 4411a as shown in FIG6 is circular, the corresponding second light-reflecting pattern 4412 is also circular.

[0132] Example 2:

[0133] As shown in Figure 9, the first reflective pattern 4411 includes a first central portion ZX1 and multiple first radiating portions FS1. The first central portion ZX1 surrounds the second reflective pattern 4412, and the multiple first radiating portions FS1 are arranged circumferentially along the first central portion ZX1. This allows for gaps JX between adjacent first radiating portions FS1, meaning that there are no reflective structures 440 between adjacent first radiating portions FS1. This allows light from the light-emitting device 420 to emit light of the same intensity, both irradiating the first radiating portions FS1 and passing through the gaps JX between adjacent first radiating portions FS1.

[0134] In some examples, when the first light-reflecting pattern 4411 includes a hollow area 4411a as shown in FIG6 , the portion of the first light-reflecting pattern 4411 excluding the hollow area 4411a may include a first central portion ZX1 and a plurality of first radiating portions FS1. In some examples, when the first light-reflecting pattern 4411 includes a first sub-portion ZB1 and a second sub-portion ZB2 as shown in FIG7 , the second sub-portion ZB2 may include a first central portion ZX1 and a plurality of first radiating portions FS1.

[0135] In some examples, the first central portion ZX1 may be of a regular shape; for example, the outer edge ZXB1 of the first central portion ZX1 may be a polygon (e.g., a rectangle), a circle, an ellipse, etc. In one possible implementation, when the outer edge ZXB1 of the first central portion ZX1 is circular, the plurality of first radiating portions FS1 are arranged in a circular array along the outer edge of the first central portion ZX1 at the center of the circle.

[0136] In some examples, the number of the plurality of first radiating portions FS1 is greater than or equal to five. This allows less light emitted by the light-emitting device 420 to pass through gaps between adjacent first radiating portions FS1, while more light is reflected by the first radiating portions FS1. For example, the number of the plurality of first radiating portions FS1 may be five, six, seven, eight, ten, or twelve.

[0137] In some examples, the reflectivity of the first central portion ZX1 is equal to the reflectivity of the first radiating portion FS1. In one possible implementation, the first central portion ZX1 and the first radiating portion FS1 are made of the same material; this facilitates manufacturing and reduces process steps. In another possible implementation, the first central portion ZX1 and the first radiating portion FS1 are made of different materials, but have the same reflectivity. Furthermore, the transmittance of the first central portion ZX1 and the transmittance of the first radiating portion FS1 can be the same.

[0138] In other examples, the reflectivity of the first central portion ZX1 is greater than that of the first radiating portion FS1, so that the first central portion ZX1 reflects more light emitted by the light-emitting device 420, while the first radiating portion FS1 reflects less light emitted by the light-emitting device 420. According to the distribution of luminous intensity in the light projection area GQ shown in FIG3 , the light emitted by the light-emitting device 420 has a higher intensity when irradiating the first central portion ZX1 and a lower intensity when irradiating the first radiating portion FS1.

[0139] This creates a high-intensity, high-volume reflected light on the first central portion ZX1, while a low-intensity, low-volume reflected light on the first radiating portion FS1. The reflected light propagates to the light projection area GQ and dark projection area AQ, as shown in Figure 2. This increases the brightness of the dark projection area AQ, as shown in Figure 2, and improves the brightness uniformity between the dark projection area AQ and the light projection area GQ, as shown in Figure 2. Consequently, the light emitted by the light-emitting module is more uniform.

[0140] In a possible implementation, the first central portion ZX1 and the first radiating portion FS1 are made of different materials; wherein the transmittance of the first central portion ZX1 may be lower than the transmittance of the first radiating portion FS1 .

[0141] The second reflective pattern 4412 includes a second central portion FS2 and a plurality of second radiating portions ZX2, and the plurality of second radiating portions ZX2 are arranged along the circumference of the second central portion FS2. In some examples, when the first reflective pattern 4411 may include a first sub-portion ZB1 and a second sub-portion ZB2 as shown in FIG. 7 , the first sub-portion ZB1 may include: a second central portion FS2 and a plurality of second radiating portions ZX2.

[0142] In some examples, the second central portion FS2 may be a regular shape, such as a polygon (e.g., a rectangle), a circle, an ellipse, or other regular shapes. For example, when the second central portion FS2 is circular, the plurality of second radial portions ZX2 are arranged in a circular array along the center of the second central portion FS2 and on the outer edge of the second central portion FS2.

[0143] In some examples, the reflectivity of the second central portion FS2 is equal to the reflectivity of the second radiating portion ZX2. In one possible implementation, the second central portion FS2 and the second radiating portion ZX2 are made of the same material, which facilitates manufacturing and reduces process steps. In another possible implementation, the second central portion FS2 and the second radiating portion ZX2 are made of different materials, but have the same reflectivity. Furthermore, the transmittance of the second central portion FS2 and the transmittance of the second radiating portion ZX2 can be the same.

[0144] In other examples, the reflectivity of the second central portion FS2 is greater than that of the second radiating portion ZX2. This results in the second central portion FS2 reflecting more light from the light-emitting device 420, while the second radiating portion ZX2 reflects less light from the light-emitting device 420. According to the distribution of luminous intensity in the light projection area GQ shown in FIG3 , the light emitted by the light-emitting device 420 has a higher intensity when it shines on the second central portion FS2, while a lower intensity when it shines on the second radiating portion ZX2.

[0145] This creates a high-intensity, high-volume reflected light on the second central portion FS2, while a low-intensity, low-volume reflected light on the second radiating portion ZX2. The reflected light propagates to the light projection area GQ and dark projection area AQ, as shown in Figure 2. This increases the brightness of the dark projection area AQ, as shown in Figure 2, and improves the brightness uniformity between the dark projection area AQ and the light projection area GQ, as shown in Figure 2. Consequently, the light emitted by the light-emitting module is more uniform.

[0146] In a possible implementation, the material of the second central portion FS2 is different from the material of the second radiating portion ZX2 , wherein the transmittance of the second central portion FS2 may be lower than the transmittance of the second radiating portion ZX2 .

[0147] In some examples, the number of the plurality of first radial portions FS1 is equal to the number of the plurality of second radial portions ZX2. The number of each of the plurality of first radial portions FS1 and the plurality of second radial portions ZX2 can be four, six, seven, nine, twelve, sixteen, or the like. For example, as shown in FIG9 , the number of first radial portions FS1 and the number of second radial portions ZX2 are both twelve, as shown in FIG10A , the number of first radial portions FS1 and the number of second radial portions ZX2 are both seven, and as shown in FIG10B , the number of first radial portions FS1 and the number of second radial portions ZX2 are both six. In some examples, the plurality of first radial portions FS1 are symmetrically distributed. For example, the plurality of first radial portions FS1 are bilaterally symmetrical as shown in FIG9 . In some examples, the plurality of second radial portions ZX2 are symmetrically distributed. For example, the plurality of second radial portions ZX2 are bilaterally symmetrical as shown in FIG9 .

[0148] In some embodiments, the extension direction of the first radiating portion FS1 coincides with the extension direction of the plurality of second radiating portions ZX2. This can be understood as a line connecting the extension direction of a first radiating portion FS1 with the extension direction of a corresponding second radiating portion ZX2 being a straight line ZX. For example, a line connecting the end of the first radiating portion FS1 with the end of the second radiating portion ZX2 is a straight line ZX, and this straight line also passes through the center of the reflective unit shown in Figures 9, 10A, and 10B.

[0149] In this way, the width KD of the first reflective pattern 4411 is equal in at least two directions (e.g., the first direction and the second direction hereinafter) parallel to the plane where the first reflective pattern 4411 is located. This allows light reflected by the second reflective pattern 4412 to be reflected onto the first reflective pattern, thereby allowing the first radiating portion FS1 to reflect more light. The width KD of the first reflective pattern 4411 can be understood as the size of the first reflective pattern 4411 along that direction (e.g., the first direction or the second direction hereinafter).

[0150] In some examples, the first radiating portion FS1 may have a first tip DJ1 and a first valley end GD1. The first tip DJ1 is closer to the second light-reflecting pattern 4412 than the first valley end GD1. The second radiating portion ZX2 has a second tip DJ2 and a second valley end GD2. The second tip DJ2 is closer to the first light-reflecting pattern 4411 than the second valley end GD2. The extension direction of the first radiating portion FS1 coincides with the extension direction of the plurality of second radiating portions ZX2. This can be understood as the line connecting the first tip DJ1 and the second tip DJ2 being the straight line ZX, and the line connecting the first valley end GD1 and the second valley end DG1 being the straight line ZL. In other words, the extension direction of the first tip DJ1 is the same as the extension direction of the second tip DJ2, and the extension direction of the first valley end GD1 is the same as the extension direction of the second valley end DG1.

[0151] In some examples, the first radiation portion FS1 may have a root portion and an end portion, wherein the root portion is disposed on the outer edge ZXB1 of the first central portion ZX1 , and the end portion is disposed opposite to the root portion.

[0152] In one possible implementation, referring again to FIG9 , the first radial portion FS1 includes a first side DB1, a second side DB2, and a third side DB3, which are sequentially connected. The second side DB2 can be a root, and the corner corresponding to the second side DB2 (i.e., the junction between the first side DB1 and the third side DB3) can be an end. The junction between the first side DB1 and the third side DB3 can have a curvature, which can be understood as a rounded corner. The second side DB2 can be a curved edge.

[0153] Among them, the first tip JD1 and the end of the first radial portion FS1 can be understood as the connection between the first side DB1 and the second side DB2, and the first valley end GD1 can be understood as the connection between the first side DB1 of the first radial portion FS1 and the third side DB3 of the adjacent first radial portion FS1.

[0154] Example 3:

[0155] 11 , the outer edge of the first light-reflecting pattern 4411 is a regular shape, such as a regular polygon. The shape of the second light-reflecting pattern 4412 is a regular shape, such as a regular polygon.

[0156] In some examples, the outer edge of the first light-reflecting pattern 4411 is a regular polygon, and the shape of the second light-reflecting pattern 4412 is a regular polygon; for example, the regular polygon can be a regular dodecagon as shown in Figure 11. In one possible implementation, the shape of the first sub-portion ZB1 shown in Figure 7 or the shape of the hollow area 4411a shown in Figure 6 is the same as the shape of the second light-reflecting pattern 4412.

[0157] 11 , the spacing between adjacent reflective units 441 is smaller than the distance between the outermost reflective unit and the edge of the optical film G.

[0158] The optical film G can include a third edge DBY3 and a fourth edge DBY4 that are perpendicular to each other, with the third edge DBY3 connected to the fourth edge DBY4. The fourth edge DBY4 extends parallel to the first direction, and the third edge DBY3 extends parallel to the second direction. The third edge DBY3 and the fourth edge DBY4 can be two in number, thereby forming a rectangular or square optical film G.

[0159] For example, along the first direction, that is, in the same row of reflective units 441, the spacing between adjacent reflective units 441 is less than the distance H1 between the first outermost reflective unit DYF1 and the third edge DBY3 of the optical film G. The first outermost reflective unit DYF1 can be understood as the reflective unit 441 closest to the third edge DBY3 of the optical film G in the same row of reflective units 441.

[0160] For another example, along the second direction, that is, in the same column of reflective units 441, the spacing between adjacent reflective units 441 is less than the distance H2 between the second-most edge reflective unit DYF2 and the fourth edge DBY4 of the optical film G. The second-most edge reflective unit DYF2 can be understood as the reflective unit 441 closest to the fourth edge DBY4 of the optical film G in the same column of reflective units 441.

[0161] 11 , the optical film G has a protruding mounting portion G01 configured to fix the optical film G. For example, the mounting portion G01 of the optical film G can be fixedly connected to the plastic frame or the middle frame, thereby fixing the optical film G on the plastic frame or the middle frame.

[0162] In some examples, the shape of the mounting portion G01 can be a regular shape such as a rectangle or a square, which makes it easier to manufacture the mounting portion G01 on the optical film G.

[0163] In some possible implementations, mounting portion G01 includes a fifth edge B01, a sixth edge B02, and a seventh edge B03. Fifth edge B01 is connected to sixth edge B02, sixth edge B02 is connected to seventh edge B03, and fifth edge B01 is connected to fourth edge DBY4. Seventh edge B03 can be connected to fourth edge DBY4 or third edge DBY3. For example, fifth edge B01 is parallel to third edge DBY3. For another example, sixth edge B02 is parallel to fourth edge DBY4. Seventh edge B03 is parallel to third edge DBY3.

[0164] When the fifth edge B01 is parallel to the third edge DBY3 , along the second direction, in the same column of first edgemost reflective units DYF1 , the extension direction of the center line ZXX of each first edgemost reflective unit DYF1 coincides with the extension direction of the fifth edge B01 of the mounting portion G01 .

[0165] In some embodiments, the second reflective pattern 4412 is located within the light projection area GQ. In some examples, the second reflective pattern 4412 covers the geometric center of gravity of the light projection area GQ. In this way, the light with the highest luminous intensity emitted by the light-emitting device 420 can be irradiated on the second reflective pattern 4412, so that the second reflective pattern 4412 can reflect the light with the highest luminous intensity and transmit it to, for example, the dark projection area AQ shown in FIG. 2 , thereby enhancing the brightness of the dark projection area AQ in the related art and improving the uniformity of the brightness between the dark projection area AQ and the bright projection area GQ in the related art.

[0166] 12 and 13 , at least a portion of the first light-reflecting pattern 4411 is located within the light projection area GQ. In some examples, the first light-reflecting pattern 4411 is located within the light projection area GQ.

[0167] In other examples, referring again to Figures 12 and 13 , a portion of the first reflective pattern 4411 is located within the light projection area GQ, while another portion is located outside the light projection area GQ. For example, in the reflective unit 441, the first reflective pattern 4411 includes a second portion DY2 and at least one (e.g., one, or more) first portion DY1; the at least one first portion DY1 is located within the light projection area GQ and surrounds the second reflective pattern 4412; the second portion DY2 is located outside the light projection area GQ and connected to the at least one first portion DY1. The portion of the first reflective pattern 4411 can be understood as the at least one first portion DY1, and the portion of the first reflective pattern 4411 can be understood as the second portion DY2.

[0168] In one possible implementation, the reflecting unit 441 includes a second reflecting pattern 4412; in the reflecting unit 441, the first reflecting pattern 4411 includes a second portion DY2 and a first portion DY1; a first portion DY1 is located within the light projection area GQ, and a first portion DY2 is arranged around the second reflecting pattern 4412; the second portion DY2 is located outside the light projection area GQ and is connected to a first portion DY1.

[0169] In another possible implementation, the reflecting unit 441 includes a plurality of second reflecting patterns 4412; in the reflecting unit 441, the first reflecting pattern 4411 includes a second portion DY2 and a plurality of first portions DY1; the plurality of first portions DY1 are located within the light projection area GQ, and each first portion DY1 is arranged around a second reflecting pattern 4412; the second portion DY2 is located outside the light projection area GQ and is connected to the plurality of first portions DY1.

[0170] In some embodiments, both the first reflective pattern 4411 and the second reflective pattern 4412 are light-transmitting. This allows light emitted by the light-emitting device 420 to both transmit and be reflected by the first and second reflective patterns 4411, 4412. In some examples, the transmittance of the second reflective pattern 4412 is lower than that of the first reflective pattern 4411. According to the luminous intensity distribution of light emitted by the light-emitting device 420 shown in FIG3 , the light emitted by the light-emitting device 420 has a higher intensity when it impinges on the second reflective pattern 4412, while it has a lower intensity when it impinges on the first reflective pattern 4411. This allows the second reflective pattern 4412 to transmit less light and reflect more of the higher-intensity light, while the first reflective pattern 4411 can transmit more light and reflect less of the lower-intensity light.

[0171] In some embodiments, referring to FIG. 14 , the first reflective pattern 4411 includes a plurality of first sub-reflective patterns ZFG1, which are sequentially arranged around a second reflective pattern 4412. The reflectivity of the plurality of first sub-reflective patterns ZFG1 decreases in a direction from the second reflective pattern 4412 toward the first reflective pattern 4411. The reflectivity of the second reflective pattern 4412 is greater than the reflectivity of the plurality of first sub-reflective patterns ZFG1.

[0172] In some examples, when the first light-reflecting pattern 4411 includes two first sub-light-reflecting patterns ZFG1 , the two first sub-light-reflecting patterns ZFG1 may be a first central portion ZX1 and a first radiation portion FS1 as shown in FIG. 9 .

[0173] In some other embodiments, referring again to FIG. 14 , the second reflective pattern 4412 includes a second sub-reflective pattern ZFG2 and at least one (e.g., one or more) third sub-reflective pattern ZFG3; the at least one third sub-reflective pattern ZFG3 is sequentially arranged around the second sub-reflective pattern ZFG2; wherein, along the direction from the second reflective pattern 4412 to the first reflective pattern 4411, the reflectivities of the second sub-reflective pattern ZFG2 and the at least one third sub-reflective pattern ZFG3 decrease sequentially. The reflectivities of the second sub-reflective pattern ZFG2 and the third sub-reflective pattern ZFG3 are both greater than the reflectivity of the first reflective pattern 4411.

[0174] In some examples, when the second light-reflecting pattern 4412 includes a second sub-light-reflecting pattern ZFG2 and a third sub-light-reflecting pattern ZFG3, the second sub-light-reflecting pattern ZFG2 may be the second central portion FS2 as shown in FIG. 6 , and the third sub-light-reflecting pattern ZFG3 may be a plurality of second radiation portions ZX2 as shown in FIG. 9 .

[0175] In some other embodiments, along the direction from the second light-reflecting pattern 4412 to the first light-reflecting pattern 4411 , the reflectivities of the second sub-light-reflecting pattern ZFG2 , the at least one third sub-light-reflecting pattern ZFG3 , and the plurality of first sub-light-reflecting patterns ZFG1 decrease in sequence.

[0176] In some embodiments, the reflectivity of the second reflective pattern 4412 is 80% to 90%. For example, it can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, etc. In some examples, the transmittance of the second reflective pattern 4412 is 10% to 20%. For example, it can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.

[0177] In other embodiments, the reflectivity of the first light-reflecting pattern 4411 is 30% to 40%. For example, it can be 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc. In some examples, the transmittance of the first light-reflecting pattern 4411 is 60% to 70%. For example, it can be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, etc.

[0178] In other embodiments, the reflectivity of the second light-reflecting pattern 4412 is 80% to 90%, and the reflectivity of the first light-reflecting pattern 4411 is 30% to 40%. In some examples, the transmittance of the second light-reflecting pattern 4412 is 10% to 20%, and the transmittance of the first light-reflecting pattern 4411 is 60% to 70%. The values ​​of the reflectivity and transmittance of the first light-emitting pattern and the values ​​of the reflectivity and transmittance of the second light-emitting pattern can be referred to the description of the values ​​of the reflectivity and transmittance of the first light-emitting pattern and the values ​​of the reflectivity and transmittance of the second light-emitting pattern in the above embodiments.

[0179] In some embodiments, the light-emitting film group further includes a plurality of circuit units; the plurality of circuit units are disposed on the substrate 410, and the circuit units are coupled to the light-emitting device 420. The light-emitting film group further includes at least one (e.g., one, or more) driver chip. The driver chip is disposed on the substrate 410, and the driver chip is coupled to at least one (e.g., one, or more) circuit unit. The driver chip is configured to provide a drive signal to the light-emitting device 420 to drive the light-emitting device 420 to emit light (i.e., control the current flowing through the device group QZ). For example, the driver chip may be a display driver integrated circuit (DDIC).

[0180] For example, referring again to Figures 15 and 16 , the brightness of multiple light-emitting devices 420 can be independently controlled. For example, each circuit unit can be coupled to a light-emitting device 420. In some examples, when the brightness of multiple light-emitting devices 420 can be independently controlled, the reflective unit 441 includes a second reflective pattern 4412 and a first reflective pattern 4411 disposed around the second light-emitting pattern.

[0181] As another example, referring to Figures 17 and 18, a plurality of light-emitting devices 420 are divided into a plurality of device groups QZ, and one device group QZ includes K (for example, four, six, eight, nine, ten, sixteen, etc.) light-emitting devices 420 connected in series, where K is greater than 2. For example, a device group QZ shown in Figure 17 includes four light-emitting devices 420. In some examples, the plurality of device groups QZ can be arranged in an array. In addition, the plurality of device groups QZ can be arranged in any other manner, such as according to the desired display pattern, and is not limited to a matrix arrangement. In some examples, in the reflective unit 441, when the number of hollow areas 4411a is, for example, K, the arrangement of the K light-emitting devices 420 in the device group QZ is the same as the arrangement of the K hollow areas 4411a, and no further details are given.

[0182] The brightness of multiple device groups QZ can be independently controlled; that is, each circuit unit is coupled to a device group QZ, allowing the current flowing through different device groups QZ to be individually controlled, thereby dimming local areas of the light-emitting module 40. In some examples, a circuit unit can also be connected in series with K light-emitting devices 420 in a device group QZ. In one possible implementation, a circuit unit can be connected in series with an exponential number of light-emitting devices 420 in a device group QZ, such as four, nine, sixteen, twenty-five, etc.

[0183] In some examples, referring again to FIG. 17 and FIG. 18 , when the brightness of multiple device groups QZ can be independently controlled, each device group QZ corresponds to one light-reflecting unit 441. The light-reflecting unit 441 includes K second light-reflecting patterns 4412 and a first light-reflecting pattern 4411 disposed around the K second light-reflecting patterns 4412. The orthographic projection of each second light-reflecting pattern 4412 in the light-reflecting unit 441 on the substrate 410 overlaps with the orthographic projection of a light-emitting device 420 in the corresponding device group QZ on the substrate 410.

[0184] In other examples, as shown in FIG. 19 , when the brightness of multiple device groups can be independently controlled, the reflective structure 440 may include multiple reflective zones FQ. Each reflective zone FQ includes a plurality, K, of reflective units 441. When each device group QZ corresponds to a reflective zone FQ, the reflective units 441 include a second reflective pattern 4412 and a first reflective pattern 4411 disposed around the second reflective pattern 4412. The orthographic projection of the second reflective pattern 4412 contained in each reflective unit 441 in a reflective zone FQ on the substrate 410 overlaps with the orthographic projection of a light-emitting device 420 in the corresponding device group QZ on the substrate 410.

[0185] In some embodiments, referring to Figures 15, 16, 17, and 18, the light-emitting device 420 has a first edge extending along a first direction and a second edge extending along a second direction. The first direction intersects (e.g., is perpendicular to) the second direction. In the reflective unit 441, at least one second reflective pattern 4412 is distributed in an n*m array, where n is the number of second reflective patterns 4412 included in each row in the first direction and is greater than or equal to 1. m is the number of second reflective patterns 4412 included in each column in the second direction and is greater than or equal to 1. In some examples, when the brightness of multiple light-emitting devices 420 can be independently controlled, m=n=1. In some examples, when the brightness of multiple device groups QZ can be independently controlled, K=m*n, where both m and n are greater than 1.

[0186] The length L of the reflective unit 441 in the first direction and the width W of the reflective unit 441 in the second direction satisfy the following formula: L = nL1 + 2h tan(θ-90°) + (n-1)L3 + δ l2 . (1) W=mW1+2h tan(θ-90°)+(m-1)W3+δ w2 (2)

[0187] Wherein, L1 is the length of the light-emitting device 420 in the first direction, and W1 is the width of the light-emitting device 420 in the second direction. h is the height between the light-emitting device 420 and the plane where the reflective structure 440 is located. θ is the light-emitting angle of the light-emitting device 420, where the value range of θ is 120° to 150° (for example, 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc.). L3 is the length between adjacent light-emitting devices 420 in the first direction, and W3 is the width between adjacent light-emitting devices 420 in the second direction. δ l2 and δ w2 is a constant; among them, δ l2 is the tolerance of the reflective unit 441 disposed on the optical film G in the first direction; δ w2is the tolerance of the light reflecting unit 441 disposed on the optical film G in the second direction.

[0188] In some examples, when the number of second reflective patterns in reflective unit 441 and the number of light-emitting devices in device assembly QZ are determined, the spacing between adjacent reflective units 441 in the first direction and the spacing between adjacent reflective units 441 in the second direction can be determined based on the above description of reflective unit 441 and device assembly QZ. For example, when the calculation formulas for the length L of reflective unit 441 in the first direction and the width W of reflective unit 441 in the second direction are determined, the spacing d1 between adjacent reflective units 441 in the first direction and the spacing d2 between adjacent reflective units 441 in the second direction satisfy the following formula: d1 = L3 - 2h tan(θ - 90°) - δ l2 . d2=W3-2h tan(θ-90°)-δ w2 .

[0189] In some examples, when a device group QZ includes four light emitting devices 420 connected in series, L1 = 0.6 mm; W1 = 0.25 mm; θ = 120°; L3 = 2.1 mm; W3 = 2 mm; δ l2 =0.15mm;δ w2 =0.15 mm. In the case where the quantum dot film 430 is present between the optical film G and the plurality of light emitting devices 420, h is the thickness of the quantum dot film 430, that is, h=0.25 mm.

[0190] Substituting the above parameters into formula (1), the length L of the reflective unit 441 in the first direction is calculated as follows: L = nL1 + 2h tan(θ-90°) + (n-1)L3 + δ l2 =1.04mm.

[0191] Substituting the above parameters into formula (2), the width W of the reflective unit 441 in the second direction is calculated as follows: W = mW1 + 2h tan (θ - 90°) + (m - 1) W3 + δ w2 =0.69mm.

[0192] In one possible implementation, the above parameters are substituted into the calculation formula of the spacing d1 and the spacing d2, and it can be obtained that: d1=L3-2h tan(θ-90°)δ l2 =1.66mm. d2=W3-2h tan(θ-90°)-δ w2 =1.56mm.

[0193] For example, referring to Figures 17 and 18 , when the first reflective pattern 4411 includes a first central portion ZX1 and a plurality of first radiating portions FS1 , a length L4 of the first central portion ZX1 in the first direction and a width W4 of the first central portion ZX1 in the second direction satisfy the following formula:

[0194] In some examples, For example, when L = 1.04 mm and W = 0.69 mm,

[0195] In the first radiation portion FS1, the length δ from the upper end to the root along the first direction is l4 and the width δ from the end portion to the root portion along the second direction W4 Satisfies the following formula: δ l4 =(L-L4) / 2; δ W4 =(W-W4) / 2.

[0196] For example, when L = 1.04 mm, W = 0.69 mm, L4 = 0.45 mm, W4 = 0.188 mm, δ l4 =(L-L4) / 2=0.295mm; δ W4 =(W-W4) / 2=0.251mm.

[0197] Exemplarily, the length L5 of the second light-reflecting pattern 4412 in the first direction and the width W5 of the second light-reflecting pattern 4412 in the second direction satisfy the following formula:

[0198] In some examples, For example, when L4=0.45mm and W4=0.188mm,

[0199] An embodiment of the present disclosure provides an assembly method for a light emitting module. Referring to FIG. 20 , the assembly method includes steps S100 , S200 , and S600 .

[0200] Step S100: arranging a plurality of light-emitting devices on a substrate; the plurality of light-emitting devices are configured to emit light toward a side away from the substrate.

[0201] Step S200: Disposing an optical film on a side of the plurality of light-emitting devices away from the substrate.

[0202] Step S600: Disposing a reflective structure on the optical film; the reflective structure includes a plurality of reflective units; the reflective units include: at least one second reflective pattern and a first reflective pattern formed around the at least one second reflective pattern; the reflectivity of the second reflective pattern is greater than the reflectivity of the first reflective pattern. The orthographic projection of the second reflective pattern on the substrate overlaps with the orthographic projection of the light-emitting device on the substrate, and the second reflective pattern is configured to reflect light emitted by the light-emitting device; the first reflective pattern is configured to reflect light emitted by the light-emitting device. The descriptions of steps S100, S200, and S600 can be referred to the description of the light-emitting module above and are not repeated here.

[0203] A reflective structure is provided on the optical film; in some examples, the reflective structure is provided on the side of the optical film G close to the substrate 410 as shown in FIG4A ; for example, the reflective structure is provided on the side of the diffusion film 450 close to the substrate 410 as shown in FIG4A . In other examples, the reflective structure is provided on the side of the optical film away from the substrate. In other examples, the reflective structure is provided inside the optical film as shown in FIG4B ; for example, the reflective structure and the optical film can be provided as a whole, which can reduce the process compared to providing the reflective structure and the optical film separately. For example, the reflective structure can be provided inside the diffusion film as shown in FIG4B .

[0204] In some examples, step S200 and step S600 can be adaptively selected based on the process requirements of the assembly method. For example, step S200 can be performed first, and then step S600. For another example, step S600 can be performed first, and then step S200.

[0205] Continuing to refer to FIG. 20 , before step S600 , the light emitting module assembly method further includes steps S300 to S500 .

[0206] Step S300: Determine the shape of each second reflective pattern and the shape of the first reflective pattern in the reflective unit.

[0207] In some examples, the shape of the light-emitting device is determined by optical testing. The shape of each second reflective pattern and the shape of the first reflective pattern in the reflective unit are determined based on the shape of the light-emitting device. The shape of the light-emitting device can be a regular shape such as an ellipse or a rectangle.

[0208] Step S400: Determine the size of the second reflective pattern and the size of the first reflective pattern 4411 based on the shape of the second reflective pattern and the shape of the first reflective pattern, as well as the length L1 of the light-emitting device in the first direction, the width W1 of the light-emitting device in the second direction, the height h between the light-emitting device and the plane where the reflective structure is located, the light-emitting angle θ of the light-emitting device, the length L3 between adjacent light-emitting devices in the first direction, and the width W3 between adjacent light-emitting devices in the second direction. It can be understood that the length L of the reflective unit 441 in the first direction and the width W of the reflective unit 441 in the second direction satisfy the following formula: L = nL1 + 2h tan(θ-90°) + (n-1)L3 + δ l2 . (1) W=mW1+2h tan(θ-90°)+(m-1)W3+δ w2 (2)

[0209] The description of the parameters in formula (1) and formula (2) can be found in the relevant description of the parameters in formula (1) and formula (2) above, and will not be repeated here.

[0210] In addition, when the first reflective pattern includes a first central portion and a first radiating portion, the calculation method for the first reflective pattern can refer to the calculation formula for the first reflective pattern above. When the second reflective pattern includes a second central portion and a second radiating portion, the calculation method for the second reflective pattern can refer to the calculation formula for the second reflective pattern above. This will not be repeated here.

[0211] Step S500: Provide a first mesh plate comprising a plurality of first meshes and a second mesh plate comprising a plurality of second meshes; wherein the shape and size of the first meshes are determined based on the shape and size of the first reflective pattern. For example, the shape and size of the first meshes can be determined based on the shape and size of the first meshes in Example 1 above; or, as another example, the shape and size of the first meshes can be determined based on the shape and size of the first meshes in Example 2 above. The shape and size of the second meshes are determined based on the shape and size of the second reflective pattern. For example, the shape and size of the second meshes can be determined based on the shape and size of the second meshes in Example 1 above; or, as another example, the shape and size of the second meshes can be determined based on the shape and size of the second meshes in Example 2 above.

[0212] In some examples, the first reflective pattern includes a first central portion and a first radiating portion. For the description of the first reflective pattern including the first central portion and the first radiating portion, reference may be made to the description above regarding the first reflective pattern including the first central portion and the first radiating portion. The second reflective pattern includes a second central portion and a second radiating portion. For the description of the second reflective pattern including the second central portion and the second radiating portion, reference may be made to the description above regarding the second reflective pattern including the second central portion and the second radiating portion.

[0213] In some examples, first meshes of the first screen and second meshes of the second screen are provided according to the number of the reflective units, wherein the number of the first meshes and the second meshes is equal to the number of the plurality of second reflective patterns.

[0214] In some examples, when the method for assembling the light-emitting module further includes steps S300 to S500, step S600 may include:

[0215] A first light reflecting pattern 4411 is first formed on the optical film G using a plurality of first meshes YWK of the first screen YWB.

[0216] For example, referring to Figure 21 , a first screen YWB is fixedly mounted on the bottom of a processing frame CT, with the plane of the first screen YWB parallel to the processing frame CT. The processing frame CT is adjusted to a suitable height for the first screen YWB. An optical film G is placed at the bottom of the first screen YWB. A squeegee GB is used to print the first ink YYM through the first mesh YWK onto the optical film G. After a period of rest, a first reflective pattern 4411 is formed on the optical film G.

[0217] Next, a second light-reflecting pattern 4412 is formed on the first light-reflecting pattern 4411 by using a plurality of second meshes EWK of a second screen board EWB.

[0218] For example, referring to Figure 22 , replace the second screen EWB and securely place it on the bottom of the operating frame CT, with the plane of the second screen EWB parallel to the operating frame CT. Adjust the operating frame CT to an appropriate height for the second screen EWB. Place an optical film G with a first reflective pattern 4411 on the bottom of the second screen EWB. Use a squeegee GB to print the second ink EYM through the second mesh EWK onto the second reflective pattern 4412. After a period of rest, the second reflective pattern 4412 forms on the first reflective pattern 4411. This results in the reflective unit 441 shown in Figure 7 . The second reflective pattern 4412 overlaps the portion of the first reflective pattern 4411.

[0219] Exemplarily, a first light reflecting pattern 4411 is first formed on the optical film G using a plurality of first meshes YWK of a first screen YWB.

[0220] In other examples, when the light emitting module assembly method further includes steps S300 to S500, step S600 may include:

[0221] A first light-reflecting pattern is formed on the optical film by using a plurality of first mesh holes of the first screen plate, wherein the first light-reflecting pattern has a hollow area.

[0222] For example, a first screen is fixedly mounted on the bottom of an operating frame, with the plane of the first screen parallel to the operating frame. The operating frame is adjusted to a suitable height for the first screen. A solid portion having the same shape as the second reflective pattern is provided within the first mesh. An optical film is positioned at the bottom of the first screen. A first ink is printed onto the optical film through the first mesh using a squeegee. The film is allowed to stand for a period of time, forming a first reflective pattern on the optical film. The first reflective pattern has a hollowed-out area.

[0223] Next, a second reflective pattern is formed in the hollow area by using a plurality of second meshes of the second screen.

[0224] For example, replace the second screen and secure it to the bottom of the operating frame, with the plane of the second screen parallel to the operating frame. Adjust the operating frame to adjust the second screen to the appropriate height. Place an optical film with a first reflective pattern on the bottom of the second screen, aligning the second screen with the hollowed-out area. Use a squeegee to print the second ink through the second mesh openings into the hollowed-out area. After a period of rest, the second reflective pattern is formed in the hollowed-out area. This results in a reflective unit as shown in Figure 6.

[0225] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A light-emitting module, wherein: include: substrate; A plurality of light emitting devices are disposed on the substrate and configured to emit light toward a side away from the substrate; An optical film is arranged on a side of the plurality of light emitting devices away from the substrate; A reflective structure, disposed on the optical film; The reflective structure includes a plurality of reflective units; The reflective unit comprises: a first reflective pattern and at least one second reflective pattern, at least a portion of the first reflective pattern is arranged around the at least one second reflective pattern; the reflectivity of the second reflective pattern is greater than or equal to the reflectivity of the first reflective pattern; The orthographic projection of the second reflective pattern on the substrate has an overlapping area with the orthographic projection of the light-emitting device on the substrate, and is configured to reflect light emitted by the light-emitting device; the first reflective pattern is configured to reflect light emitted by the light-emitting device.

2. The light emitting module according to claim 1, wherein: The transmittance of the second light-reflecting pattern is lower than the transmittance of the first light-reflecting pattern.

3. The light emitting module according to claim 1 or 2, wherein: The light-emitting module has a plurality of light projection areas; the light projection area is an area illuminated by light emitted by a light-emitting device within the plane where the reflective structure is located; The second light-reflecting pattern is located within the light projection area, and at least a portion of the first light-reflecting pattern is located within the light projection area.

4. The light emitting module according to claim 3, wherein: The second light-reflecting pattern covers the geometric center of gravity of the light projection area.

5. The light emitting module according to claim 3 or 4, wherein: The reflective unit includes a second reflective pattern; in the reflective unit, the first reflective pattern is located in the light projection area; or, The reflective unit includes multiple second reflective patterns; in the reflective unit, the first reflective pattern includes a second part and multiple first parts; the first part is located within the light projection area and is arranged around the second reflective pattern; the second part is located outside the light projection area and is connected to the multiple first parts.

6. The light emitting module according to any one of claims 1 to 5, wherein: The first reflective pattern has at least one hollow area, and the second reflective pattern is arranged in the hollow area; or, The first reflective pattern and the second reflective pattern are stacked; the second reflective pattern is close to the substrate relative to the first reflective pattern; wherein the first reflective pattern includes a first sub-portion and a second sub-portion; the orthographic projection of the first sub-portion on the substrate coincides with the orthographic projection of the second reflective pattern on the substrate; the second sub-portion is located outside the second reflective pattern and is arranged around the first sub-portion.

7. The light emitting module according to any one of claims 1 to 6, wherein: The first light-reflecting pattern includes a first central portion and a plurality of first radiating portions, wherein the first central portion is arranged around a circle of the second light-reflecting pattern, and the plurality of first radiating portions are arranged along the circumference of the first central portion.

8. The light emitting module according to claim 7, wherein: The number of the plurality of first radiating portions is greater than or equal to five.

9. The light emitting module according to claim 7 or 8, wherein: The reflectivity of the first central portion is greater than or equal to the reflectivity of the first radiating portion.

10. The light emitting module according to any one of claims 1 to 9, wherein: The second light reflecting pattern includes a second central portion and a plurality of second radiating portions, and the plurality of second radiating portions are arranged along a circumferential direction of the second central portion.

11. The light emitting module according to claim 10, wherein: The reflectivity of the second central portion is greater than or equal to the reflectivity of the second radiating portion.

12. The light emitting module according to claim 10 or 11, wherein: The first reflective pattern includes a plurality of first radiating portions; the number of the plurality of first radiating portions is equal to the number of the plurality of second radiating portions; and the extending direction of the first radiating portion coincides with the extending direction of the plurality of second radiating portions.

13. The light emitting module according to any one of claims 1 to 12, wherein: The light emitting device has a first edge extending along a first direction and a second edge extending along a second direction; In the reflective unit, the at least one second reflective pattern is distributed in an n*m array; n is the number of second light-reflecting patterns included in each row in the first direction, and is greater than or equal to 1; m is the number of second light-reflecting patterns included in each column in the second direction, and is greater than or equal to 1; The length L of the reflective unit in the first direction and the width W of the reflective unit in the second direction satisfy the following formula: L=nL1+2h tan(θ-90°)+(n-1)L3+δ l2 ; <h2 style=";text-align:left;direction:ltr">W = mW1 + 2h tan(θ - 90°) + (m - 1)W3 + δ<h2 style=";text-align:left;direction:ltr"> w2 <h2 style=";text-align:left;direction:ltr"> ; Wherein, L1 is the length of the light-emitting device in the first direction, W1 is the width of the light-emitting device in the second direction; h is the height between the light-emitting device and the plane where the reflective structure is located; θ is the light-emitting angle of the light-emitting device; L3 is the length between adjacent light-emitting devices in the first direction, and W3 is the width between adjacent light-emitting devices in the second direction; δ l2 and δ w2 is a constant.

14. The light emitting module according to claim 13, wherein: The first reflective pattern includes a first central portion and a plurality of first radiating portions; the first radiating portion has an end portion and a root portion, the root portion is arranged on the first central portion, and the end portion is an end of the root portion away from the first central portion; The length L4 of the first central portion in the first direction and the width W4 of the first central portion in the second direction satisfy the following formula: The length L5 of the second light-reflecting pattern in the first direction and the width W5 of the second light-reflecting pattern in the second direction satisfy the following formula: In the first radiating portion, the length δ from the end portion to the root portion along the first direction is l4 and a width δ between the end and the root along the second direction W4 Satisfies the following formula: d l4 =(L-L4) / 2;δ W4 = (W-W4) / 2.

15. The light emitting module according to any one of claims 1 to 6 and 13, wherein: The outer edge of the first reflective pattern is elliptical or circular, and the outer edge of the first reflective pattern is an edge of the first reflective pattern away from the second reflective pattern; and / or, The second light reflecting pattern is in an elliptical or circular shape.

16. The light emitting module according to any one of claims 1 to 15, wherein: The brightness of the plurality of light emitting devices is independently controlled; The reflective unit includes: a first reflective pattern and a second reflective pattern, and at least a portion of the first reflective pattern is arranged around the second luminous pattern.

17. The light emitting module according to any one of claims 1 to 15, wherein: The plurality of light-emitting devices are divided into a plurality of device groups, each device group comprising K light-emitting devices connected in series, wherein K is greater than 2; One device group corresponds to one reflective unit; the reflective unit includes a first reflective pattern and K second reflective patterns, at least a portion of the first reflective pattern is arranged around the K second light-emitting patterns; wherein the orthographic projection of each second reflective pattern in the reflective unit on the substrate has an overlapping area with the orthographic projection of a light-emitting device in the corresponding device group on the substrate; or, One device group corresponds to K reflective units; the reflective unit includes a first reflective pattern and a second reflective pattern, and at least a portion of the first reflective pattern is arranged around the second light-emitting pattern; wherein the orthographic projection of the second reflective pattern contained in each of the K reflective units on the substrate has an overlapping area with the orthographic projection of a light-emitting device in the corresponding device group on the substrate.

18. The light emitting module according to any one of claims 1 to 17, wherein: The reflective structure is arranged on a side of the optical film close to the substrate.

19. The light emitting module according to any one of claims 1 to 18, wherein: The density of the first light-reflecting pattern is less than or equal to the density of the second light-reflecting pattern.

20. The light emitting module according to any one of claims 1 to 19, wherein: The thickness of the first light-reflecting pattern is less than or equal to the thickness of the second light-reflecting pattern.

21. The light emitting module according to any one of claims 1 to 20, wherein: The first light reflecting pattern is a first ink, and the second light reflecting pattern is a second ink.

22. The light emitting module according to any one of claims 1 to 21, wherein: The optical film is a diffusion film or a light uniforming film.

23. The light emitting module according to any one of claims 1 to 22, wherein: The first reflective pattern includes a plurality of first sub-reflective patterns, and the plurality of first sub-reflective patterns are sequentially arranged around a circle of the second reflective pattern; wherein, along the direction of the second reflective pattern pointing to the first reflective pattern, the transmittance of the plurality of first sub-reflective patterns decreases sequentially; and / or, The second reflective pattern includes a second sub-reflective pattern and at least one third sub-reflective pattern; the at least one third sub-reflective pattern is sequentially arranged around the second sub-reflective pattern; wherein, along the direction of the second reflective pattern pointing to the first reflective pattern, the transmittance of the second sub-reflective pattern and the at least one third sub-reflective pattern decreases sequentially.

24. The light emitting module according to any one of claims 1 to 23, wherein: The reflectivity of the second reflective pattern is 80% to 90%; and / or, The reflectivity of the first reflective pattern is 30% to 40%.

25. A method for assembling a light emitting module, wherein: include: Arranging a plurality of light emitting devices on a substrate; A plurality of light emitting devices are configured to emit light toward a side away from the substrate; Disposing an optical film on a side of the plurality of light emitting devices away from the substrate; Disposing a reflective structure on the optical film; The reflective structure includes a plurality of reflective units; The reflective unit comprises: a first reflective pattern and at least one second reflective pattern, at least a portion of the first reflective pattern is arranged around the at least one second reflective pattern; the reflectivity of the second reflective pattern is greater than the reflectivity of the first reflective pattern; The orthographic projection of the second reflective pattern on the substrate has an overlapping area with the orthographic projection of the light-emitting device on the substrate, and is configured to reflect light emitted by the light-emitting device; the first reflective pattern is configured to reflect light emitted by the light-emitting device.

26. The method for assembling a light emitting module according to claim 25, wherein: Before the step of forming a reflective structure on the optical film, the method for assembling the light emitting module further includes: Determining the shape of each second reflective pattern and the shape of the first reflective pattern in the reflective unit; Determine the size of the second reflective pattern and the first reflective pattern based on the shape of the second reflective pattern and the shape of the first reflective pattern, as well as the length L1 of the light-emitting device in the first direction, the width W1 of the light-emitting device in the second direction, the height h between the light-emitting device and the plane where the reflective structure is located, the light-emitting angle θ of the light-emitting device, the length L3 between adjacent light-emitting devices in the first direction, and the width W3 between adjacent light-emitting devices in the second direction; Providing a first mesh plate including a plurality of first meshes and a second mesh plate including a plurality of second meshes; wherein the shape and size of the first meshes are determined according to the shape and size of the first reflective pattern; and the shape and size of the second meshes are determined according to the shape and size of the second reflective pattern; The step of forming a reflective structure on the optical film comprises: A plurality of first light-reflecting patterns are formed on the optical film by using a plurality of first meshes of the first screen; a plurality of second light-reflecting patterns are formed on the optical film by using a plurality of second meshes of the second screen.

27. A display device, wherein: include: The light emitting module according to any one of claims 1 to 24.

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