Backlight module and display device

Abstract

The embodiment of the utility model provides a backlight module and a display device, relates to the technical field of display, and aims to alleviate the problem of poor brightness uniformity of the backlight module in related technologies. The backlight module is provided with a main backlight area and a light supplementing area, the light supplementing area is located on at least one side of the main backlight area, and the backlight module comprises a light guide plate, a light source and a light supplementing assembly. The light guide plate is located in the main backlight area; the light source is arranged on the light inlet side of the light guide plate and located outside the light supplementing area. The light supplementing assembly is located in the light supplementing area.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] In the related art, for the edge-entry backlight module, the light source is incident from one side of the light guide plate. For the middle position of the light guide plate close to the light source, it receives relatively more light, which ultimately leads to a relatively higher brightness at this position, while for the two end positions of the light guide plate close to the light source, it receives relatively less light, which ultimately leads to a relatively lower brightness at this position. In addition, for the side of the light guide plate far from the light source, it receives relatively less light, which ultimately leads to a relatively lower brightness at this position. Therefore, for the edge-entry backlight module as a whole, some areas have higher brightness, while other areas have lower brightness, resulting in poor brightness uniformity. Utility Model Content

[0003] The embodiments of the present application provide a backlight module and a display device, which are used to alleviate the problem of poor brightness uniformity of the backlight module in the related art.

[0004] The embodiment of the present application provides a backlight module, which has a main backlight area and a fill light area, wherein the fill light area is located at least on one side of the main backlight area, and the backlight module comprises: a light guide plate, a light source, and a fill light component. The light guide plate is located in the main backlight area; the light source is arranged on the light incident side of the light guide plate and is located outside the fill light area; the fill light component is located in the fill light area.

[0005] In some embodiments, the backlight module further has a main light source area, the light source is located in the main light source area, and the fill light area and the main light source area are located on opposite sides of the main backlight area.

[0006] In some embodiments, the backlight module further has a main light source area, the light source is located in the main light source area, the fill light area is located on three sides of the main backlight area, and the main light source area and the fill light area surround the main backlight area.

[0007] In some embodiments, the fill light assembly includes a light board and a fill light source disposed on the light board and electrically connected to the light board.

[0008] In some embodiments, the light panel is fixedly connected to the light guide plate.

[0009] In some embodiments, the fill light source includes a plurality of fill light sub-light sources, and the plurality of fill light sub-light sources are evenly arranged along an extension direction of the light board.

[0010] In some embodiments, an extension direction of the light board is the same as an extension direction of a side surface of the light guide plate close to the fill light area.

[0011] In some embodiments, the supplementary photon light source is a white light LED lamp.

[0012] In some embodiments, the light source includes a driving circuit board and a plurality of sub-light sources electrically connected to the driving circuit board, and the plurality of sub-light sources are evenly arranged along a length direction of the driving circuit board.

[0013] Some embodiments of the present disclosure further provide a display device, which includes the backlight module described in any of the above embodiments.

[0014] The embodiment of the present application sets up a fill light component, which can fill light on at least one of the first fill light side, the second fill light side and the third fill light side, thereby increasing the brightness of the side position, and further effectively alleviating the problem of uneven brightness of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a backlight module in the related art;

[0017] Figure 2 is a schematic structural diagram of a backlight module provided in some embodiments of the present application;

[0018] Figure 3 is a structural schematic diagram of a backlight module provided in other embodiments of the present application;

[0019] Figure 4 It is a structural schematic diagram of a backlight module provided in some embodiments of the present application.

[0020] Description of main component symbols:

[0021] 1. Light source; 2. Light guide plate; 3. Fill light assembly; 10. Backlight module; 21. Light incident side; 22. Fill light side; 31. Light board; 32. Fill light source; 101. Main backlight area; 102. Fill light area; 103. Main light source area; 201. First fill light side; 202. Second fill light side; 203. Third fill light side; 221. First fill light side; 222. Second fill light side; 223. Third fill light side; X, first direction; Y, second direction;

[0022] M11, first test point; M12, second test point; M13, third test point; M21, fourth test point;

[0023] M22, fifth test point; M23, sixth test point; M31, seventh test point; M32, eighth test point;

[0024] M33, the ninth test point; M1', the first test point; M2', the second test point; M3', the third test point. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0028] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0029] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0030] In the related art, for an edge-type backlight module, the light source is generally a light bar and includes a plurality of sub-light sources. The light source is incident from one side of a light guide plate. Figure 1 As shown in the first test point M1' in the figure, there are more sub-light sources that can provide light to it, so M1' receives relatively more light, which ultimately leads to a relatively higher brightness at this position; and for the two end positions of the light guide plate close to the light source (such as Figure 1 The second test point M2' in the figure shows that the number of sub-light sources corresponding to M2' is small, and the light received is relatively small, which ultimately leads to a relatively lower brightness at this position. In addition, for the side of the light guide plate away from the light source (for example, the middle position of the side, such as Figure 1 The third test point M3' in the figure receives relatively less light, which ultimately leads to a relatively lower brightness at this position. Therefore, for the edge-type backlight module as a whole, some areas have higher brightness and other areas have lower brightness, resulting in poor brightness uniformity.

[0031] Based on this, some embodiments of the present disclosure provide a backlight module, such as Figures 2 to 4 As shown, the backlight module 10 has a main backlight area 101 and a supplementary light area 102 , and the supplementary light area 102 is located at least on one side of the main backlight area 101 .

[0032] The backlight module 10 includes: a light guide plate 2 located in the main backlight area 101, a light source 1, and a supplementary light area 102. The light source 1 is arranged on the light incident side of the light guide plate 2 and outside the supplementary light area 102. The light emitted by the light source 1 enters the light guide plate 2, and the light guide plate 2 can make the main part of the light emitted from the main backlight area 101, so as to realize the light emission of the backlight module 10.

[0033] As the fill light area 102 is located farther from the light source 1, less light is finally emitted from the fill light area 102 through the light guide of the light guide plate 2. Since the fill light area 102 is provided with a fill light component 3, the light emitted by the fill light component 3 is mainly emitted from the fill light area 102, thereby improving the brightness of the fill light area 102, which is conducive to making the brightness of the backlight module 10 in the fill light area 102 consistent with the brightness of the main backlight area 101, thereby improving the brightness uniformity of the backlight module 10.

[0034] It is worth noting that the fill light component 3 can be any component that can provide a light source, and the light provided by the fill light component 3 can be used to compensate for the light in the fill light area 102 .

[0035] In some examples, such as Figures 2 to 4 As shown, the light guide plate 2 includes a light incident side 21 and a fill light side 22, the light incident side 21 faces the light source 1, and the fill light side 22 includes: a first fill light side 221, a second fill light side 222 and a third fill light side 223, the light incident side 21, the first fill light side 221, the second fill light side 222 and the third fill light side 223 are located around the light guide plate 2, the first fill light side 221 is arranged opposite to the light incident side 21, and the second fill light side 222 and the third fill light side 223 are arranged opposite to each other.

[0036] In some examples, the boundary of the light guide plate 2 may overlap with the boundary of the main backlight area 101 , that is, the shape and size of the light guide plate 2 are completely consistent with the shape and size of the main backlight area 101 .

[0037] The fill light area 102 is located at least one of the first fill light side 221, the second fill light side 222, and the third fill light side 223. In this way, when a fill light component 3 is provided on any one of the first fill light side 221, the second fill light side 222, and the third fill light side 223, the fill light component 3 can fill light at that side to improve the brightness of that side, thereby avoiding the problem of uneven brightness of the backlight module 10 caused by low brightness at that side.

[0038] In some examples, the length direction of the light guide plate 2 is the first direction X, and the second fill-light side 222 and the third fill-light side 223 are located at opposite ends of the light guide plate 2 in the first direction X.

[0039] In some examples, the width direction of the light guide plate 2 is the second direction Y. Exemplarily, the second direction Y is perpendicular to the first direction X. In this case, the light incident side 21 and the first supplemental light side 221 are located at opposite ends of the light guide plate 2 in the second direction Y.

[0040] In some embodiments, Figure 2 and Figure 3As shown, the fill light assembly 3 may include a light board 31 and a fill light source 32 disposed on the light board 31 and electrically connected to the light board 31 .

[0041] The fill light source 32 can emit light under the drive of the light board 31 , thereby filling light at the position where the fill light component 3 is located, improving the brightness of the light guide plate 2 at the position on the side corresponding to the fill light component 3 , thereby ensuring the brightness uniformity of the backlight module 10 .

[0042] In addition, the light board 31 can also adjust the brightness of the fill light source 32 by adjusting the voltage provided to the fill light source 32 , so that fill light can be provided according to actual needs, thereby ensuring the brightness uniformity of the backlight module 10 .

[0043] In some embodiments, the light board 31 is fixedly connected to the light guide plate 2. By fixing the light board 31 to the light guide plate 2, it is beneficial to improve the stability of the overall structure.

[0044] In some examples, the two oppositely disposed side surfaces of the light board 31 and the light guide plate 2 can be bonded by an adhesive, so that the light board 31 can be fixedly connected to the light guide plate 2, and the tightness of the connection between the light board 31 and the light guide plate 2 can be improved, and the distance between the two can be reduced. Since the distance between the two is reduced, it is also beneficial to reduce the distance between the fill light source 32 and the light guide plate 2, thereby increasing the brightness of the fill light source 32 on the light guide plate 2, thereby ensuring the uniformity of the light output of the light guide plate 2 as a whole.

[0045] Exemplarily, the adhesive may be transparent optical adhesive.

[0046] In some embodiments, please refer to Figure 2 and Figure 3 The fill light source 32 includes a plurality of fill light sub-light sources, and the plurality of fill light sub-light sources are evenly arranged along the extension direction of the light board 31 .

[0047] In this way, by providing a plurality of fill-light sub-light sources, the fill-light area 102 can be effectively illuminated more evenly, thereby facilitating improving the brightness uniformity of the backlight module 10 .

[0048] In some examples, multiple fill light sources arranged along the extension direction of the light board 31 can form a fill light source row, and multiple fill light source rows can be arranged in parallel, so that the number of fill light sources on the light board 31 can be increased, thereby helping to improve the brightness of the area where the fill light component 3 is set.

[0049] In some embodiments, the above-mentioned fill light source can be a white light LED. In this way, the white light is directly emitted by the LED, so that the brightness of the area where the fill light source 32 is set can be directly compensated, avoiding the subsequent conversion of the LED light color and causing the thickness of the backlight module 10 to increase.

[0050] Exemplarily, the above-mentioned fill light sub-light source is Mini LED, so that the fill light component 3 as a whole can have a smaller size.

[0051] In some embodiments, please refer to Figure 2 and Figure 3 The extension direction of the light board 31 is the same as the extension direction of the side surface of the light guide plate 2 close to the fill light area 102 .

[0052] Exemplarily, the light guide plate 2 has a fill light side surface located at the fill light side 22 and close to the fill light area 102 , and an extension direction of the fill light side surface is the same as an extension direction of the light board 31 .

[0053] Figure 2 and Figure 3 The fill light component 3 is disposed on the first fill light side 221 for exemplary description. In this case, the fill light side includes the first fill light side 201 . The first fill light side 201 is located on the first fill light side 221 and is disposed opposite to the fill light component 3 .

[0054] like Figure 2 As shown, the first fill light side surface 201 is linearly arranged, and the extension direction of the first fill light side surface 201 is consistent with the length direction of the light guide plate 2, that is, the extension direction of the first fill light side surface 201 is parallel to the first direction X. At this time, the light board 31 is also linearly arranged, and the extension direction of the light board 31 is parallel to the first direction X.

[0055] like Figure 3 As shown, the first fill-light side surface 201 is arranged in an arc shape, and the extension direction of the first fill-light side surface 201 changes with different positions. At this time, the light board 31 is also arranged in an arc shape, and the curvature of the light board 31 is consistent with the curvature of the first fill-light side surface 201, so that the extension direction of the first fill-light side surface 201 is always the same as the extension direction of the light board 31.

[0056] It is worth noting that the light incident side 21 and the fill light side 22 do not refer to the corresponding sides of the light guide plate 2, but refer to the corresponding directions of the light guide plate 2. The fill light side refers to the corresponding side of the light guide plate 2. For example, the first fill light side 201 refers to the side of the light guide plate 2 facing the fill light component 3 disposed on the first fill light side 221.

[0057] In some embodiments, Figure 2 and Figure 3 As shown, the backlight module further has a main light source area 103 , the light source 1 is located in the main light source area 103 , and the supplementary light area 102 and the main light source area 103 are located on opposite sides of the main backlight area 101 .

[0058] At this time, the fill light component 3 is arranged on the first fill light side 221. Since the position of the first fill light side 201 is relatively far from the light source 1, the fill light component 3 is arranged on the first fill light side 221, so that the brightness of the position of the first fill light side 201 of the light guide plate 2 can be effectively compensated, thereby improving the light uniformity of the backlight module 10.

[0059] In some examples, such as Figure 2 As shown, the fill light component 3 can be arranged in the middle of the fill light area 102, that is, the fill light component 3 is located in the middle of the first fill light side surface 201. In this way, the middle position of the first fill light side surface 201 can be effectively compensated for the light effect, thereby improving the brightness at this position. In addition, since the light of the fill light source 32 in the fill light component 3 is divergent in all directions, the fill light component 3 is arranged in the above-mentioned middle position, and the positions at both ends of the first fill light side surface 201 can also be effectively radiated, thereby helping to alleviate the problem of uneven brightness of the backlight module 10.

[0060] In other examples, such as Figure 3 As shown, the fill light component 3 can cover the fill light area 102, that is, the fill light component 3 can be located on the entire side of the first fill light side 201. This arrangement can fully and effectively compensate the light on the first fill light side 201, thereby effectively ensuring the uniformity of the light luminance of the backlight module 10.

[0061] In some embodiments, Figure 4 As shown, the fill light area 102 is located on three sides of the main backlight area 101 , and the main light source area 103 and the fill light area 102 surround the main backlight area 101 .

[0062] At this time, the fill light component 3 is disposed on the first fill light side 221 , the second fill light side 222 and the third fill light side 223 .

[0063] In this case, the light guide plate 2 further comprises a second fill light side surface 202 located at the second fill light side 222 and opposite to the fill light component 3, and a third fill light side surface 203 located at the third fill light side 223 and opposite to the fill light component 3. In this way, the fill light component 3 can effectively fill light the areas corresponding to the first fill light side surface 201, the second fill light side surface 202 and the third fill light side surface 203, thereby ensuring the uniformity of the light luminance of the backlight module 10.

[0064] For some examples, please refer to Figure 4 The fill light component 3 can surround and enclose the first fill light side surface 201, the second fill light side surface 202 and the third fill light side surface 203, so as to ensure that the above fill light sides can achieve good and effective fill light.

[0065] In some examples, a plurality of light emission test points may be provided on the backlight module 10 to test the light emission effect of the backlight module 10. Figure 4 As shown, the backlight module 10 is evenly and spaced apart with three rows of test points along its width direction (eg, the second direction Y), each row of test points includes three test points, and the three test points are evenly and spaced apart along the length direction (eg, the first direction X) of the backlight module 10 .

[0066] Among them, a row of test points close to the light source 1 includes a first test point M11, a second test point M12 and a third test point M13; a row of test points far from the light source 1 includes a seventh test point M31, an eighth test point M32 and a ninth test point M33; a row of test points in the middle includes a fourth test point M21, a fifth test point M22 and a sixth test point M23. Among them, the first test point M11, the third test point M13, the fourth test point M21, the sixth test point M23, the seventh test point M31, the eighth test point M32 and the ninth test point M33 can be set on the fill light component 3, and can also be set on the light guide plate 2.

[0067] For all the above test points, since the light source 1 and the fill light component 3 surround the light guide plate 2, it can be ensured that all the test points can achieve good light output brightness. In actual tests, all the above test points can achieve 100% light output brightness, thus achieving a uniform light output effect of the backlight module.

[0068] In some embodiments, the light source 1 includes a driving circuit board and a plurality of sub-light sources electrically connected to the driving circuit board, and the plurality of sub-light sources are evenly arranged along the length direction of the driving circuit board. By providing a plurality of sub-light sources, it is advantageous to illuminate multiple parts of the light guide plate 2, thereby improving the lighting effect received by the light guide plate 2.

[0069] Exemplarily, the length direction of the driving circuit board may be consistent with the length direction of the light guide plate 2 , which is beneficial to improving the lighting effect of the light guide plate 2 .

[0070] Exemplarily, the length of the driving circuit board is equal to the length of the light guide plate 2 , which is beneficial to provide sufficient and effective illumination to the first test point M11 and the third test point M13 .

[0071] In some embodiments, the backlight module 10 further includes a back plate, and the light source 1 , the light guide plate 2 , and the fill light component 3 are all disposed on the back plate.

[0072] Exemplarily, the light guide plate 2 and the light board 31 in the fill light assembly 3 are both fixed on the back plate, which is helpful to ensure the relative position stability of the light guide plate 2 and the fill light assembly 3.

[0073] Some embodiments of the present disclosure further provide a display device, which includes the backlight module 10 as described in any of the above embodiments.

[0074] Since the backlight module is included, the display device has all the technical effects of the backlight module 10. Since the backlight module 10 can provide a relatively uniform light output effect, the light output brightness uniformity at each position of the backlight module 10 is good, thus ensuring that the display device has good display uniformity.

[0075] The utility model names provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A backlight module, characterized in that: The backlight module has a main light source area, a main backlight area and a fill light area. The backlight module includes: A light guide plate, located in the main backlight area; A light source is located in the main light source area, is disposed on the light incident side of the light guide plate and is outside the supplementary light area; and A fill light component is located in the fill light area; The fill light area and the main light source area are located on two opposite sides of the main backlight area; or, the fill light area is located on three sides of the main backlight area, and the main light source area and the fill light area surround the main backlight area.

2. The backlight module according to claim 1, characterized in that: The fill light assembly includes a light board and a fill light source disposed on the light board and electrically connected to the light board.

3. The backlight module according to claim 2, characterized in that: The lamp board is fixedly connected to the light guide plate.

4. The backlight module according to claim 2, characterized in that: The fill light source includes a plurality of fill light sub-light sources, and the plurality of fill light sub-light sources are evenly arranged along the extension direction of the light board.

5. The backlight module according to claim 4, characterized in that: The extension direction of the light board is the same as the extension direction of the side surface of the light guide plate close to the fill light area.

6. The backlight module according to claim 4, characterized in that: The supplementary photon light source is a white light LED lamp.

7. The backlight module according to claim 1, characterized in that: The light source comprises a driving circuit board and a plurality of sub-light sources electrically connected to the driving circuit board, and the plurality of sub-light sources are evenly arranged along the length direction of the driving circuit board.

8. A display device, characterized in that: It comprises the backlight module as described in any one of claims 1-7.

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