Backlight and display device

Abstract

This application provides a backlight and a display device, relating to the field of display technology, with the aim of at least solving the problem of the inability to adjust the light emission angle of backlights in related technologies. The backlight includes a substrate and a plurality of first light-emitting components and a plurality of second light-emitting components located on the substrate. Each first light-emitting component emits light along a first direction, and each second light-emitting component emits light along a second direction, the second direction intersecting the first direction.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a backlight and display device. Background Technology

[0002] As a core component of non-self-emissive display devices such as LCD displays, the backlight's light emission performance directly determines key display indicators such as brightness, contrast, color performance, and viewing angle, and has a crucial impact on the user's visual experience.

[0003] Currently, backlights typically use the same type of light-emitting devices, resulting in light emission from a single direction. The light emission angle cannot be dynamically adjusted according to the actual usage scenario and user needs. Utility Model Content

[0004] This application provides a backlight and a display device to at least solve the problem that the light emission angle of the backlight cannot be adjusted in the related art.

[0005] On one hand, embodiments of this application provide a backlight source, including:

[0006] substrate;

[0007] The substrate contains a plurality of first light-emitting components and a plurality of second light-emitting components. Each first light-emitting component emits light along a first direction, and each second light-emitting component emits light along a second direction, the second direction intersecting the first direction.

[0008] In some embodiments, one first light-emitting component and one second light-emitting component are adjacent to each other and constitute a light-emitting component, and a plurality of light-emitting components are arranged in multiple rows and columns on the substrate.

[0009] In some embodiments, among the plurality of light-emitting components arranged in the row direction, a plurality of first light-emitting components and a plurality of second light-emitting components are arranged side by side.

[0010] In some embodiments, the first and second light-emitting components in each of the light-emitting components are arranged along a column direction; in a plurality of light-emitting components arranged along a column direction, a plurality of the first light-emitting components and a plurality of the second light-emitting components are arranged alternately.

[0011] In some embodiments, the first light-emitting component and the second light-emitting component in each of the light-emitting components are arranged along the column direction; in two adjacent light-emitting components arranged in the row direction, the two first light-emitting components are diagonally distributed and the two second light-emitting components are diagonally distributed; in a plurality of light-emitting components arranged along the column direction, a plurality of first light-emitting components and a plurality of second light-emitting components are arranged alternately.

[0012] In some embodiments, each of the first light-emitting components includes a first light-emitting device located on the substrate and a first lens located on the first light-emitting device, wherein the first lens is used to converge the light emitted by the first light-emitting device and emit it along the first direction.

[0013] In some embodiments, each of the second light-emitting components includes a second light-emitting device located on the substrate and a second lens located on the second light-emitting device, the second lens being used to converge the light emitted by the second light-emitting device and emit it along the second direction.

[0014] In some embodiments, the backlight further includes a plurality of third light-emitting components and a plurality of fourth light-emitting components located on the substrate. Each of the third light-emitting components emits light along a third direction, and each of the fourth light-emitting components emits light along a fourth direction. The fourth direction intersects the first direction, the second direction, and the third direction, respectively. The fourth direction and the third direction are symmetrical about a central axis perpendicular to the substrate. The second direction and the first direction are symmetrical about the central axis.

[0015] In some embodiments, the plurality of first light-emitting components and the plurality of second light-emitting components are located in the light source layer, and the backlight further includes a light-diffusing film located on the side of the light source layer opposite to the substrate.

[0016] In some embodiments, the light-diffusing film includes a substrate and a plurality of protrusions located on the side of the substrate opposite to the light source layer, wherein the spacing between two adjacent protrusions is not equal.

[0017] On the other hand, embodiments of this application also provide a display device, which includes a backlight as described in any of the above embodiments.

[0018] The backlight provided in this application includes a first light-emitting component and a second light-emitting component with different light emission directions. By controlling the activation of either the first or second light-emitting component, light emission in a specific direction can be achieved. For example, when only the first light-emitting component is activated, the overall light emission direction of the backlight is towards the first direction. When only the second light-emitting component is activated, the overall light emission direction of the backlight is towards the second direction. This allows for dynamic control of the backlight emission angle, thereby changing the viewing angle of the display device to which the backlight is applied, thus providing a good privacy protection function and improving the user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a backlight provided in some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a backlight provided in some other embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the light emission direction of a display device according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of another light emission direction of a display device according to some embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of a first light-emitting component according to some embodiments of this application;

[0025] Figure 6 This is a schematic diagram of the structure of the second light-emitting component provided in some embodiments of this application;

[0026] Figure 7 This is a schematic diagram of the structure of a backlight provided in some embodiments of this application;

[0027] Figure 8 This is a schematic diagram of the structure of a display device provided in some embodiments of this application;

[0028] Figure label:

[0029] 10. Substrate; 100. Backlight; 1000. Display device;

[0030] 20. Light source layer; 200. Liquid crystal display panel; 201. Light-emitting component; 21. First light-emitting component; 211. First light-emitting device; 212. First lens; 22. Second light-emitting component; 211. Second light-emitting device; 212. Second lens; 23. Third light-emitting component; 24. Fourth light-emitting component;

[0031] 30. Uniform light film;

[0032] X1, first direction; X2, second direction; X3, third direction; X4, fourth direction; Y1, row direction; Y2, column direction. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different technical features. The term "multiple" and similar words indicate two or more unless otherwise expressly defined.

[0035] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0036] The use of “for” in this application implies an open and inclusive language, which does not exclude the applicability to or configuration of devices to perform additional tasks or steps.

[0037] In this application, the term "example" is used to mean "used as an example, illustration, or illustration." Any embodiment described as "example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application.

[0038] The various embodiments of this application are similar, and features from different embodiments and / or different examples can be combined with each other.

[0039] Some embodiments of this application provide a backlight source, such as Figure 1 and Figure 2 As shown, the backlight 100 includes a substrate 10 and a plurality of first light-emitting components 21 and a plurality of second light-emitting components 22 located on the substrate 10. Each first light-emitting component 21 emits light along a first direction X1, and each second light-emitting component 22 emits light along a second direction X2. The second direction X2 intersects the first direction X1.

[0040] The backlight 100 provided in this application embodiment has a first light-emitting component 21 and a second light-emitting component 22 with different light-emitting directions. By controlling the activation of one of the first light-emitting component 21 and the second light-emitting component 22, light emission in a specific direction can be achieved. For example, when only the first light-emitting component 21 is activated, the overall light-emitting direction of the backlight 100 is towards the first direction X1. When the backlight 100 is applied to a display device 1000, such as... Figure 3 As shown, the light emission direction of the display device 1000 is towards the first direction X1. When only the second light-emitting component 22 is turned on, the overall light emission direction of the backlight 100 is towards the second direction X2. When the backlight 100 is applied to the display device 1000, as... Figure 4 As shown, the light emission direction of the display device 1000 is oriented towards the second direction X2. This allows for dynamic control of the light emission angle of the backlight 100, thereby changing the viewing angle of the display device 1000, thus providing a good privacy protection function and improving the user experience.

[0041] In addition, the first light-emitting component 21 and the second light-emitting component 22 can be turned on simultaneously. This allows the backlight 100 to emit light in different light-emitting directions, thereby enabling the display device 1000 to cover a wider viewing angle. On the other hand, it can also increase the brightness of the backlight 100, thereby improving the display brightness of the display device 1000.

[0042] In some examples, the substrate 10 is electrically connected to a plurality of first light-emitting components 21 and a plurality of second light-emitting components 22 to drive the plurality of first light-emitting components 21 and the plurality of second light-emitting components 22 to emit light.

[0043] In some examples, the first direction X1 and the second direction X2 can be symmetrical about a central axis perpendicular to the substrate 10, which can correspond to the main optical axis of the display device 1000, where the display brightness of the display device 1000 is maximum.

[0044] Of course, the angle between the first direction X1 and the central axis may not be the same as the angle between the second direction X2 and the central axis, and this application embodiment does not limit this.

[0045] In some embodiments, please continue reading Figure 1 and Figure 2 A first light-emitting component 21 is adjacent to a second light-emitting component and constitutes a light-emitting component 201. Multiple light-emitting components 201 are arranged in multiple rows and columns on the substrate 10.

[0046] In this case, since each light-emitting component 201 includes a first light-emitting component 21 and a second light-emitting component 22 that are adjacent to each other, and the multiple light-emitting components 201 are arranged in an array, the multiple first light-emitting components 21 and the multiple second light-emitting components 22 are evenly distributed on the substrate 10, thereby improving the light emission uniformity of the backlight 100.

[0047] In some examples, the backlight 100 may have a first backlight area and a second backlight area. In the first backlight area, one of the first light-emitting component 21 and the second light-emitting component 22 is turned on, while in the second backlight area, both the first light-emitting component 21 and the second light-emitting component 22 are turned on. In this case, the display device with this backlight 100 can be used in an in-vehicle display. For example, the first backlight area may correspond to the area of ​​the display device closer to the driver, having a narrow viewing angle to project the display image to the driver while preventing the display panel of the device from emitting light. The second backlight area may correspond to the area of ​​the display device closer to the passenger, having a wider viewing angle and higher brightness to effectively meet the passenger's needs for watching videos.

[0048] In some embodiments, such as Figure 1 As shown, among the multiple light-emitting components 201 arranged in the row direction Y1, multiple first light-emitting components 21 and multiple second light-emitting components 22 are arranged side by side.

[0049] In this configuration, at least some (e.g., all) of the first light-emitting components 21 are arranged in multiple rows along the column direction Y2, with each row of first light-emitting components 21 including multiple first light-emitting components 21 arranged along the row direction Y1. At least some (e.g., all) of the second light-emitting components 22 are arranged in multiple rows along the column direction Y2, with each row of second light-emitting components 22 including multiple second light-emitting components 22 arranged along the row direction Y1. A row of second light-emitting components 22 is provided between any two adjacent rows of first light-emitting components 21, and a row of first light-emitting components 21 is provided between any two adjacent rows of second light-emitting components 22. The column direction Y2 and the row direction Y1 can be perpendicular to each other.

[0050] The above arrangement facilitates the arrangement of the first light-emitting component 21 and the second light-emitting component 22, resulting in better light emission uniformity of the backlight 100.

[0051] In some examples, the first light-emitting component 21 and the second light-emitting component 22 in each light-emitting component 201 are arranged along the column direction Y2. In the plurality of light-emitting components 201 arranged along the column direction Y2, the plurality of first light-emitting components 21 and the plurality of second light-emitting components 22 are arranged alternately. For example, in the column direction Y2, a second light-emitting component 22 is provided between any two adjacent first light-emitting components 21, and a first light-emitting component 21 is provided between any two adjacent second light-emitting components 22.

[0052] This configuration ensures that the first light-emitting component 21 and the second light-emitting component 22 are relatively evenly distributed in the column direction Y2, thereby effectively improving the light emission uniformity of the backlight 100.

[0053] In some embodiments, such as Figure 2 As shown, the first light-emitting component 21 and the second light-emitting component 22 in each light-emitting component 201 are arranged along the column direction Y2. In two adjacent light-emitting components 201 arranged in the row direction Y1, the two first light-emitting components 21 are diagonally distributed, and the two second light-emitting components 22 are diagonally distributed. For example, for two adjacent light-emitting components 201 arranged in the row direction Y1, the two first light-emitting components 21 and the two second light-emitting components 22 are located at the four corners of a square, with the two first light-emitting components 21 located at two opposite corners of the square, and the two second light-emitting components 22 located at the other two opposite corners of the square, and each side of the square has a first light-emitting component 21 and a second light-emitting component 22 at its two ends.

[0054] This configuration, by having the first light-emitting component 21 and the second light-emitting component 22 arranged alternately in the row direction Y1, can make the two components relatively evenly distributed in the row direction Y1, thereby effectively improving the light emission uniformity of the backlight 100.

[0055] In some examples, among the multiple light-emitting components 201 arranged along the column direction Y2, multiple first light-emitting components 21 and multiple second light-emitting components 22 are arranged alternately.

[0056] This configuration allows the first light-emitting component 21 and the second light-emitting component 22 to be distributed relatively evenly in the row direction Y1, thereby effectively improving the light emission uniformity of the backlight 100.

[0057] In some embodiments, such as Figure 5 As shown, each first light-emitting component 21 includes a first light-emitting device 211 located on the substrate 10 and a first lens 212 located on the first light-emitting device 211. The first lens 212 is used to converge the light emitted by the first light-emitting device 211 and emit it out along the first direction X1.

[0058] This configuration allows the first lens 212 to effectively modulate the light emitted by the first light-emitting device 211, thereby controlling the first light-emitting component 21 to emit light along the first direction X1. Furthermore, the first lens 212 can effectively improve the light extraction efficiency of the first light-emitting device 211.

[0059] In some examples, the first light-emitting device 211 may be a light-emitting diode (LED), such as a Mini LED or a Micro LED.

[0060] As an example, the dot pitch of the first light-emitting device 211 can be arranged in the range of 4 mm to 12 mm.

[0061] In some embodiments, such as Figure 6 As shown, each second light-emitting component 22 includes a second light-emitting device 221 located on the substrate 10 and a second lens 222 located on the second light-emitting device 221. The second lens 222 is used to converge the light emitted by the second light-emitting device 221 and emit it out along the second direction X2.

[0062] This configuration allows the second lens 222 to effectively modulate the light emitted by the second light-emitting device 221, thereby controlling the second light-emitting device 221 to emit light along the second direction X2. Furthermore, the second lens 222 can effectively improve the light extraction efficiency of the second light-emitting device 221.

[0063] In some examples, the second light-emitting device 221 and the first light-emitting device 211 can be completely identical. By controlling the shape of the second lens 222 and the first lens 212, the light emitted by the second light-emitting device 221 and the first light-emitting device 211 can be focused and deflected respectively.

[0064] In some examples, a protective layer may be covered on the second light-emitting device 221 and the first light-emitting device 211. The protective layer can effectively protect the second light-emitting device 221 and the first light-emitting device 211, and at the same time provide a flat surface for the setting of the upper second lens 222 and the first lens 212.

[0065] In some examples, the first lens 212 and the second lens 222 can be connected to each other.

[0066] In other examples, the first lens 212 and the second lens 222 may be spaced apart from each other.

[0067] It is worth noting that in some implementations, at least one of the first light-emitting component 21 and the second light-emitting component 22 can also emit laser light. In this case, compared to a structure where the light-emitting component includes a light-emitting device and a lens, the arrangement of the lens can be omitted.

[0068] In some embodiments, such as Figure 7 As shown, the backlight 100 also includes a plurality of third light-emitting components 23 and a plurality of fourth light-emitting components 24 located on the substrate 10. Each third light-emitting component 23 emits light along a third direction X3, and each fourth light-emitting component 24 emits light along a fourth direction X4. The fourth direction X4 intersects the first direction X1, the second direction X2, and the third direction X3, respectively.

[0069] The fourth direction X4 and the third direction X3 are symmetrical about the central axis perpendicular to the substrate 10; the second direction X2 and the first direction X1 are symmetrical about the central axis. For example, the central axis corresponds to the main optical axis of the display device. The fourth direction X4 and the third direction X3 can correspond to the upper and lower viewing angles of the display device, respectively, and the second direction X2 and the first direction X1 can correspond to the left and right viewing angles of the display device, respectively. This allows for diverse adjustment of the light emission angle of the backlight 100, thereby improving the user experience.

[0070] In some examples, a first light-emitting component 21, a second light-emitting component 22, a third light-emitting component 23 and a fourth light-emitting component 24 can constitute a light-emitting component, and multiple light-emitting components are arranged in an array on the substrate 10.

[0071] In some embodiments, such as Figure 8 As shown, a plurality of first light-emitting components 21 and a plurality of second light-emitting components 22 are located in the light source layer 20, and the backlight 100 also includes a light-diffusing film 30 located on the side of the light source layer 20 away from the substrate 10.

[0072] By setting the light-diffusing film 30, the light emitted from the light source layer 20 can be effectively uniform, thereby improving the light emission uniformity of the backlight 100.

[0073] In some examples, the homogenizing film 30 includes a substrate and a plurality of protrusions located on the side of the substrate away from the light source layer 20, with unequal spacing between adjacent protrusions.

[0074] By setting protrusions on the substrate, the light emitted from the light source layer 20 can be effectively modulated, thereby improving the transmittance and light emission uniformity of the backlight 100. Furthermore, by controlling the unequal spacing between adjacent protrusions, the moiré pattern problem that easily occurs due to the array arrangement of the protrusions can be effectively mitigated.

[0075] It is worth noting that, in this example, unequal spacing between two adjacent protrusions refers to the situation where at least two adjacent protrusions in the homogenizing film 30 have unequal spacing. When the spacing between any two adjacent protrusions is unequal, the moiré pattern problem of the backlight 100 can be effectively avoided.

[0076] In some examples, the width of the protrusion in the horizontal direction can be less than or equal to 50 μm. This can be adjusted according to the pixel size of the display panel. For example, if the pixel size of the display panel is 50 μm, the width of the protrusion in the horizontal direction will be less than 50 μm.

[0077] As an example, the protrusions can all be made of transparent polymer materials.

[0078] In some examples, the backlight 100 also includes an optical film located on the side of the light source layer 20 facing away from the substrate 10. The optical film includes, for example, at least one of a brightness enhancement film, a dual brightness enhancement film, and a diffusion film. The light emission effect of the light source layer 20 can be improved by the optical film.

[0079] Some embodiments of this application also provide a display device; please continue reading. Figure 8 The display device 1000 includes a backlight 100 as described in any of the above embodiments and a display panel 200 located on the light-emitting side of the backlight 100.

[0080] Since it includes a backlight 100, the display device 1000 has the technical effects of the backlight 100 described above, which will not be repeated here.

[0081] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A backlight source, characterized in that, include: substrate; The substrate contains a plurality of first light-emitting components and a plurality of second light-emitting components. Each first light-emitting component emits light along a first direction, and each second light-emitting component emits light along a second direction, the second direction intersecting the first direction.

2. The backlight according to claim 1, characterized in that, One of the first light-emitting components and one of the second light-emitting components are adjacent to each other and constitute a light-emitting component, and multiple light-emitting components are arranged in multiple rows and columns on the substrate.

3. The backlight according to claim 2, characterized in that, Among the multiple light-emitting components arranged in the row direction, multiple first light-emitting components and multiple second light-emitting components are arranged side by side.

4. The backlight according to claim 3, characterized in that, The first and second light-emitting components in each of the light-emitting components are arranged along the column direction; In the plurality of light-emitting components arranged along the column direction, a plurality of first light-emitting components and a plurality of second light-emitting components are arranged alternately.

5. The backlight according to claim 2, characterized in that, The first and second light-emitting components in each of the light-emitting components are arranged along the column direction; In two adjacent light-emitting components arranged in the row direction, the two first light-emitting components are diagonally distributed, and the two second light-emitting components are diagonally distributed; In the plurality of light-emitting components arranged along the column direction, a plurality of first light-emitting components and a plurality of second light-emitting components are arranged alternately.

6. The backlight according to any one of claims 1-5, characterized in that, Each of the first light-emitting components includes a first light-emitting device located on the substrate and a first lens located on the first light-emitting device. The first lens is used to converge the light emitted by the first light-emitting device and emit it along the first direction. and / or Each of the second light-emitting components includes a second light-emitting device located on the substrate and a second lens located on the second light-emitting device. The second lens is used to converge the light emitted by the second light-emitting device and emit it along the second direction.

7. The backlight according to any one of claims 1-5, characterized in that, The backlight also includes a plurality of third light-emitting components and a plurality of fourth light-emitting components located on the substrate. Each of the third light-emitting components emits light along a third direction, and each of the fourth light-emitting components emits light along a fourth direction. The fourth direction intersects the first direction, the second direction, and the third direction, respectively. The fourth direction and the third direction are symmetrical about the central axis perpendicular to the substrate; the second direction and the first direction are symmetrical about the central axis.

8. The backlight according to any one of claims 1-5, characterized in that, The plurality of first light-emitting components and the plurality of second light-emitting components are located in the light source layer, and the backlight also includes a light-diffusing film located on the side of the light source layer opposite to the substrate.

9. The backlight according to claim 8, characterized in that, The light-diffusing film includes a substrate and a plurality of protrusions located on the side of the substrate opposite to the light source layer, wherein the spacing between two adjacent protrusions is not equal.

10. A display device, characterized in that, include: The backlight as described in any one of claims 1-9.

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