Backlight module, display screen and electronic equipment

Abstract

The utility model relates to a backlight module, a display screen and electronic equipment. The backlight module comprises a light guide plate; the light intensifying assembly and the light guide plate are arranged in a stacked mode, and light output from the first face of the light guide plate is transmitted to the light intensifying assembly in the first direction; at least part of a deflection surface of the light deflection assembly is opposite to the second surface of the light guide plate, and light output from the second surface of the light guide plate is transmitted to the deflection surface and is reflected to a second direction through the deflection surface to be transmitted; wherein the first direction is different from the second direction. Therefore, the light output to the light enhancement assembly can be reduced by changing the transmission direction of the light, so that the influence of bright strips formed in the edge area of the backlight module due to light leakage on the display effect of a screen is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of backlight sources, and in particular to a backlight module, a display screen and an electronic device. Background Art

[0002] With the rapid development of electronic devices, the related liquid crystal display (LCD) industry has developed rapidly, making the application range of LCD more and more extensive. However, LCD is a non-luminous display device, which usually needs the help of a backlight module to achieve the display function.

[0003] Currently, while the screen design of electronic devices pursues aesthetics, it is also prone to visual failure of the screen. For example, in order to meet the user's demand for a high screen-to-body ratio, the screen border can be set narrower, but this requires setting the overlap width of the upper light-enhancing film and the light-shielding glue in the backlight module to be narrower, which will result in the light not being effectively blocked by the light-shielding glue, causing bright lines to appear on the edge of the screen, thus affecting the user's visual effect. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a backlight module, a display screen and an electronic device, which reduces the light output to the light-enhancing component by changing the transmission direction of the light, thereby reducing the impact of bright strips formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a backlight module, comprising:

[0006] Light guide plate;

[0007] A light-increasing component is stacked with the light guide plate, and the light output from the first surface of the light guide plate is transmitted to the light-increasing component along a first direction;

[0008] A light deflection component, wherein at least a portion of a deflection surface of the light deflection component is opposite to the second surface of the light guide plate, and light output from the second surface of the light guide plate is transmitted to the deflection surface and reflected by the deflection surface to be transmitted in a second direction;

[0009] The first direction is different from the second direction.

[0010] In some embodiments, the backlight module includes:

[0011] A first light shielding layer, located between the second surface of the light guide plate and the light deflection assembly;

[0012] The intensity of the light output from the first light shielding layer is less than the intensity of the light input into the first light shielding layer.

[0013] In some embodiments, the first light shielding layer is formed on the second surface of the light guide plate.

[0014] In some embodiments, the angle between the deflection surface of the light deflection component and the first surface of the light guide plate is an obtuse angle.

[0015] In some embodiments, the light deflection assembly comprises:

[0016] At least one first protrusion, each of the first protrusions forms a deflection surface on a surface facing the light guide plate.

[0017] In some embodiments, the backlight module includes:

[0018] Frame;

[0019] The side surface of the frame body facing the light guide plate is reused as the deflection surface of the light deflection component.

[0020] In some embodiments, the frame comprises:

[0021] At least one second protrusion is arranged on the side of the frame body facing the light guide plate, and the surface of each second protrusion facing the light guide plate forms a deflection surface.

[0022] In some embodiments, the light-enhancing component comprises:

[0023] Apply brightening film;

[0024] The backlight module comprises:

[0025] The second light shielding layer extends from the frame to a side of the upper brightness enhancement sheet facing away from the light guide plate, and a portion of the second light shielding layer covers an edge of the upper brightness enhancement sheet.

[0026] In some embodiments, the light-enhancing component comprises:

[0027] Diffuser;

[0028] Lower brightness enhancement film;

[0029] Wherein, the diffusion sheet and the lower brightness enhancement sheet are stacked on the light guide plate.

[0030] According to a second aspect of the embodiments of the present disclosure, a display screen is provided, comprising the backlight module as described in the first aspect above.

[0031] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising the display screen as described in the second aspect above.

[0032] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0033] In the disclosed embodiment, the backlight module includes a light guide plate, a light enhancement component and a light deflection component. The light enhancement component and the light guide plate are stacked, and the light output from the first surface of the light guide plate is transmitted to the light enhancement component along a first direction; at least a portion of the deflection surface of the light deflection component is opposite to the second surface of the light guide plate, and the light output from the second surface of the light guide plate is transmitted to the deflection surface, and is reflected by the deflection surface and transmitted in a second direction; wherein the first direction is different from the second direction.

[0034] In this way, the embodiment of the present disclosure sets a light deflection component so that the light output from the second surface of the light guide plate is transmitted to the deflection surface, and then reflected by the deflection surface to a second direction different from the first direction for transmission. Since the second direction is different from the first direction, the light transmission direction can be changed to reduce the light transmitted to the light-enhancing component, which is beneficial to reducing the impact of bright bars formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen, thereby helping to improve the user's viewing experience.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0037] Figure 1 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 1 .

[0038] Figure 2 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 2 .

[0039] Figure 3 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 3 .

[0040] Figure 4 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 4 .

[0041] Figure 5 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 5 .

[0042] Figure 6 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 6 .

[0043] Figure 7 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 7 .

[0044] Figure 8 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 8 .

[0045] Fig. 9 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 9 .

[0046] Fig.10 It is a structural block diagram of an electronic device according to an exemplary embodiment.

[0047] Description of reference numerals:

[0048] 100, backlight module; 101, light guide plate; 102, light enhancement component; 103, frame; 104, second light shielding layer; 105, light deflection component; 106, first light shielding layer; 107, first protrusion; 108, second protrusion; 201, upper light enhancement sheet; 202, lower light enhancement sheet; 203, diffusion sheet. DETAILED DESCRIPTION

[0049] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of structures consistent with some aspects of the present disclosure as detailed in the appended claims.

[0050] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0051] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0052] The technical solutions provided by various embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0053] Figure 1 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 1 ,like Figure 1 As shown, in order to meet the user's demand for a high screen ratio, the frame around the edges of the backlight module 100 can be made narrower. However, when the frame around the edges of the backlight module 100 is set to be narrower, the overlap width of the second light shielding layer 104 and the light-increasing component 102 is also set to be narrower. After the light is output from the second surface of the light guide plate 101 along the third direction, it will be reflected by the frame 103, so that the light is transmitted to the light-increasing component 102 along the first direction, so that the light cannot be effectively blocked by the second light shielding layer 104, so that the light leaks from the edge of the area of ​​the backlight module 100, and then a bright line is generated at the edge of the screen, affecting the visual effect.

[0054] In some embodiments, the light leakage at the edge of the area of ​​the backlight module can be reduced by adjusting the angle of the upper light-enhancing sheet. Although the larger the angle of the upper light-enhancing sheet is set, the less light leakage at the edge of the area of ​​the backlight module is, the angle of the upper light-enhancing sheet cannot be set arbitrarily. If the angle of the upper light-enhancing sheet is not set properly, it will cause moiré and rainbow patterns on the screen of the display screen. Therefore, although this method can reduce the occurrence of bright lines at the edge of the screen, it still needs to take into account the problem of moiré and rainbow patterns on the screen, and cannot guarantee the display effect of the display screen.

[0055] Based on this, the disclosed embodiment proposes a backlight module, which reduces the light output to the light-enhancing component by changing the transmission direction of the light, thereby reducing the impact of bright strips formed by light leakage at the edge area of ​​the backlight module on the display effect of the screen.

[0056] Figure 2 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 2 , Figure 3 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 3 ;like Figure 2-Figure 3As shown, the backlight module 100 includes:

[0057] Light guide plate 101;

[0058] The light enhancement component 102 is stacked with the light guide plate 101, and the light output from the first surface of the light guide plate 101 is transmitted to the light enhancement component 102 along a first direction;

[0059] A light deflection component 105, wherein at least a portion of a deflection surface of the light deflection component 105 is opposite to the second surface of the light guide plate 101, and light output from the second surface of the light guide plate 101 is transmitted to the deflection surface, and is reflected by the deflection surface and transmitted in the second direction;

[0060] The first direction is different from the second direction.

[0061] It is understood that the light guide plate is an optical element, which is mainly used to guide light, for example, to guide light from one point or surface to another point or surface so that the light can be evenly distributed on the entire surface, and the light guide plate also has the function of improving lighting effects and visual effects. In some embodiments, the light guide plate can be made of a transparent material, such as organic glass or polycarbonate, and a reflective coating is coated on its surface to increase the reflectivity of light.

[0062] In some embodiments, in a liquid crystal display, the light guide plate can be located behind the light source to evenly distribute the light to the background of the display. In LED lighting, the light guide plate is located in front of the LED light source to guide the light from a point to the entire surface to achieve a uniform lighting effect.

[0063] In some embodiments, the light guide plate also has functions such as anti-ultraviolet and anti-vibration, which can hide the light source, making the appearance of the entire lighting system more beautiful, reducing the direct exposure of glare to human eyes, and effectively saving energy.

[0064] It can be understood that in order to provide a uniform surface light source for an electronic device (such as a display device), it is necessary to use a light enhancement component to process the light transmitted by the light guide plate. Therefore, the light enhancement component and the light guide plate can be stacked so that the light output from the first surface of the light guide plate is transmitted to the light enhancement component along a first direction.

[0065] Here, the brightness enhancement component may include one or more of an upper brightness enhancement sheet, a lower brightness enhancement sheet, and a diffusion sheet, which is not limited in the embodiments of the present disclosure.

[0066] In some embodiments, if the light enhancement components are an upper light enhancement sheet and a lower light enhancement sheet, the lower light enhancement component can be stacked on the light guide plate, and the upper light enhancement component can be stacked on the lower light enhancement component. When the light is output from the first surface of the light guide plate along the first direction to the lower light enhancement sheet and the upper light enhancement sheet, the lower light enhancement sheet and the upper light enhancement sheet can focus this part of the light to ensure the display effect of the electronic device.

[0067] In some embodiments, the upper and lower brightness enhancement sheets are optical thin sheets that can gather light emitted by the light source in the direction of the user of the electronic device, thereby increasing the front brightness of the display screen of the electronic device. At the same time, the upper and lower brightness enhancement sheets can also recycle the unused light outside the viewing angle of the display screen according to the re-reflection effect of light, gather the unused light at an appropriate angle, and then direct the gathered light toward the user of the electronic device.

[0068] It should be noted that since the light guide plate has a first surface and a second surface, when the light source reaches the light guide plate, the light guide plate can guide a portion of the light to be output from the first surface of the light guide plate along a first direction to the light enhancement component, so that the light enhancement component can process the light; at the same time, the light guide plate can also guide another portion of the light to be output from the second surface of the light guide plate along a second direction, but this may cause this portion of the light to be reflected to the edge area of ​​the backlight module, thereby causing the edge of the backlight module to form bright strips due to light leakage, which affects the display effect of the screen.

[0069] Therefore, in the embodiment of the present disclosure, a light deflection assembly is arranged at a position opposite to the second surface of the light guide plate, so that at least a portion of the deflection surface of the light deflection assembly is opposite to the second surface of the light guide plate, so that after the light output from the second surface of the light guide plate is transmitted to the deflection surface, it can be reflected by the deflection surface to be transmitted in a second direction different from the first direction, so as to reduce the risk of light leakage at the edge of the backlight module, avoid the generation of bright edges at the edge, and ensure the display effect of the display screen.

[0070] It should be noted that since at least a portion of the deflection surface of the light deflection component is opposite to the second surface of the light guide plate, after the light output from the second surface of the light guide plate is transmitted to the deflection surface, the deflection surface can reflect the light to the second direction, so that the light transmitted to the light increasing component is reduced, thereby reducing the risk of light leakage at the location of the light increasing component and avoiding the generation of bright edges at this location.

[0071] It can be understood that the first direction is the direction in which the light is transmitted to the light-enhancing component, that is, the first direction is the direction in which the light approaches the light-enhancing component. Since the second direction is different from the first direction, the second direction can be understood as any direction in which the light is away from the light-enhancing component. In some embodiments, the second direction can also be Figure 2 The third direction shown in Figure 2 The second direction is shown in FIG.

[0072] Here, the material of the light deflection component can also be set arbitrarily, such as plastic material, or metal material, etc.; at the same time, the shape of the light deflection component can also be set arbitrarily, such as a cylinder, a square, etc., and the embodiments of the present disclosure are not limited to this.

[0073] Here, the deflection surface of the light deflection assembly may be an inclined surface, an arc-shaped surface or a curved surface, etc.; at the same time, the deflection surface of the light deflection assembly may be one or more, and the embodiments of the present disclosure are not limited to this.

[0074] In some embodiments, if the light deflection component is a rectangular body, any surface of the rectangular body can be determined as a deflection surface, and part of the deflection surface is set opposite to the second surface of the light guide plate, so that after the light is output from the second surface of the light guide plate to the deflection surface, the deflection surface can reflect this part of the light, so that the reflected light is transmitted along a second direction different from the first direction, that is, away from the light enhancement component, thereby reducing the light transmitted to the light enhancement component to reduce the risk of light leakage.

[0075] In other embodiments, if the light deflection component is a rectangular body, the first surface of the rectangular body is determined as the deflection surface. In order to enhance the reflection effect of light, the first surface can be set as a curved surface, and the opening of the curved surface can be facing or away from the light guide plate, so that after the light is output from the second surface of the light guide plate to the curved surface, the curved surface can fully reflect this part of the light away from the light enhancement component, thereby reducing the light transmitted to the light enhancement component to reduce the risk of light leakage.

[0076] In other embodiments, if the light deflection component is a rectangular body, the first surface of the rectangular body is determined as a deflection surface. In order to enhance the reflection effect of the light, the first surface can also be cut, for example, cut into teeth to form a plurality of deflection surfaces, so that after the light is output from the second surface of the light guide plate to the plurality of deflection surfaces, each deflection surface can fully reflect this part of the light away from the light enhancement component, thereby reducing the light transmitted to the light enhancement component to reduce the risk of light leakage.

[0077] In the disclosed embodiment, the backlight module includes a light guide plate, a light enhancement component and a light deflection component. The light enhancement component and the light guide plate are stacked, and the light output from the first surface of the light guide plate is transmitted to the light enhancement component along a first direction; at least a portion of the deflection surface of the light deflection component is opposite to the second surface of the light guide plate, and the light output from the second surface of the light guide plate is transmitted to the deflection surface, and is reflected by the deflection surface and transmitted in a second direction; wherein the first direction is different from the second direction.

[0078] In this way, the embodiment of the present disclosure sets a light deflection component so that the light output from the second surface of the light guide plate is transmitted to the deflection surface, and then reflected by the deflection surface to a second direction different from the first direction for transmission. Since the second direction is different from the first direction, the light transmission direction can be changed to reduce the light transmitted to the light-enhancing component, which is beneficial to reducing the impact of bright bars formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen, thereby helping to improve the user's viewing experience.

[0079] Figure 4 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 4 ,like Figure 4 As shown, the backlight module 100 includes:

[0080] A first light shielding layer 106 is located between the second surface of the light guide plate 101 and the light deflection component 105;

[0081] The intensity of the light output from the first light shielding layer 106 is less than the intensity of the light input into the first light shielding layer 106 .

[0082] It should be noted that in order to reduce the light transmitted from the second surface of the light guide plate to the light enhancement component, a first shading layer can also be set between the light guide plate and the light deflection component, so that the light output from the second surface of the light guide plate is output to the light deflection component via the first shading layer, and / or the light reflected by the light deflection component is transmitted to the first shading layer.

[0083] Here, the first light shielding layer has the function of absorbing or shielding light, so the intensity of the light input into the first light shielding layer is greater than the intensity of the light output from the first light shielding layer.

[0084] In some embodiments, after the light output from the second surface of the light guide plate is output through the first light shielding layer, the first light shielding layer absorbs or shields this part of the light, so that the intensity of this part of the light is reduced, thereby reducing the light transmitted to the light deflection component. In this way, the light output to the light deflection component can be reduced during the light transmission process, which is conducive to reducing the impact of bright strips formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen.

[0085] In other embodiments, since the deflection surface of the light deflection component can reflect the light output from the second surface of the light guide plate, the reflected light can be transmitted to the first shading layer. The first shading layer absorbs or blocks this part of the light, so that the intensity of this part of the light is reduced. Therefore, the light transmitted to the light-enhancing component can be reduced, thereby reducing the light leakage in the edge area of ​​the backlight module and improving the display effect of the display screen.

[0086] Here, the first light-shielding layer can be any light-absorbing material, such as metal oxides (such as copper oxide), organic materials (such as graphene) or composite materials (such as multilayer film composite materials), etc., and the embodiments of the present disclosure are not limited to this.

[0087] In some embodiments, the first light shielding layer may be a black ink layer. By manufacturing the first light shielding layer with black ink, the material cost of the first light shielding layer is lower, thereby reducing the cost of the backlight module, which is beneficial to improving the competitiveness of the backlight module.

[0088] In some embodiments, the first light shielding layer may be a mesh dot structure, which can reduce the risk of light leakage by diffuse reflection, and the light leaking through the light shielding layer can effectively reduce the black edge of the screen. In other embodiments, since the mesh dot structure may be an irregular shape, the light after diffuse reflection will not be evenly distributed to each area, resulting in uneven screen brightness in the screen display area. Therefore, in order to better improve the screen display effect, the mesh dot structure may be circular, so that the light after diffuse reflection can be more evenly distributed to each area, so that the brightness of the screen display area remains consistent.

[0089] In the disclosed embodiment, the backlight module includes: a first light shielding layer, and the first light shielding layer is arranged between the second surface of the light guide plate and the light deflection component, so that the intensity of the light output from the first light shielding layer is less than the intensity of the light input to the first light shielding layer. In this way, by arranging the first light shielding layer, the light output from the second surface of the light guide plate can be output to the light deflection component via the first light shielding layer, so that the light transmitted to the light deflection component is reduced, and / or the light reflected by the light deflection component can be transmitted to the first light shielding layer, so that the light transmitted to the light enhancement component is reduced, thereby effectively reducing the light leakage in the edge area of ​​the backlight module and improving the display effect of the display screen.

[0090] Figure 5 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 5 ,like Figure 5 As shown, the first light shielding layer 106 is formed on the second surface of the light guide plate 101 .

[0091] It can be understood that the first shading layer can be formed on the second surface of the light guide plate. On the one hand, it can reduce the number of components in the backlight module, so that the size of the backlight module can be reduced, which is beneficial to reduce the manufacturing cost and meet the requirements of high screen-to-body ratio; on the other hand, since the first shading layer can absorb or block light, it can effectively reduce the light transmitted to the light deflection component. At the same time, the light reflected by the deflection surface of the light deflection component is absorbed for the second time, thereby reducing the light transmitted to the light enhancement component, which is beneficial to reduce the light leakage in the edge area of ​​the backlight module.

[0092] In some embodiments, a black ink layer can be coated on the second surface of the light guide plate to block part of the light in the light guide plate. In this way, the light that does not enter the light deflection component can be intercepted, which is beneficial to ensure the display effect of the electronic device.

[0093] Here, the coating of the black ink layer includes black pigment, solid resin, volatile solvent and additives, etc., which is not limited in the embodiment of the present disclosure.

[0094] In some embodiments, the black pigment may be a carbon pigment; the solid resin may be a mixture of one or more of cycloamino acrylic resin, polyamino acrylic resin and polyether acrylic resin; the volatile solvent may be a mixture of one or more of neopentyl glycol diacrylate and diethyl phthalate diacrylate; the additive is mainly to improve the performance of the ink itself, and may be a dispersant or a defoaming agent, etc.

[0095] In the disclosed embodiment, the first light-shielding layer is formed on the second surface of the light guide plate. On the one hand, it can reduce the number of components in the backlight module, which is beneficial to reducing the size of the backlight module, thereby helping to reduce manufacturing costs. On the other hand, since the intensity of the light output from the first light-shielding layer is less than the intensity of the light input to the first light-shielding layer, the light transmitted to the light-enhancing component can be reduced, which is beneficial to reducing light leakage in the edge area of ​​the backlight module.

[0096] In some embodiments, Figure 4 As shown, the angle between the deflection surface of the light deflection component 105 and the first surface of the light guide plate 101 is an obtuse angle.

[0097] It needs to be explained that in order to better change the transmission direction of the light output from the second surface of the light guide plate, the angle between the deflection surface of the light deflection component and the first surface of the light guide plate can be set to an obtuse angle, so that the deflection surface can reflect this part of the light to a second direction different from the first direction, thereby helping to reduce the light transmitted to the light enhancement component.

[0098] Here, the deflection surface of the light deflection assembly can be a surface of any shape, such as an inclined surface, an arc surface, etc., as long as the angle between the deflection surface and the first surface of the light guide plate is an obtuse angle, and the embodiments of the present disclosure are not limited to this.

[0099] In some embodiments, Figure 4As shown, if the light deflection component is a cylindrical component, the cylindrical component can be set to a wedge-shaped structure, and the side of the cylindrical component close to the light guide plate is used as the deflection surface of the light deflection component. The deflection surface is an inclined surface, ensuring that the distance between the end of the cylindrical component away from the light-enhancing component and the light guide plate is greater than the distance between the end of the cylindrical component close to the light-enhancing component and the light guide plate, so that the angle between the deflection surface and the first surface of the light guide plate is an obtuse angle, so as to change the transmission direction of the light, thereby reducing the light output to the light-enhancing component.

[0100] In other embodiments, if the light deflection component is a cylindrical component, then one side of the cylindrical component close to the light guide plate can be set as a curved surface, and the deflection surface is the curved surface. The opening of the curved surface can face toward or away from the light guide plate, ensuring that the angle between the curved surface and the first surface of the light guide plate is an obtuse angle, so that after the light output from the second surface of the light guide plate reaches the curved surface, the curved surface reflects this part of the light, so that the reflected light is transmitted along a second direction different from the first direction, and is fully blocked or absorbed by the first shading layer on the second surface of the light guide plate, thereby reducing the light output to the light enhancement component.

[0101] In other embodiments, if the light deflection component is a cylindrical component with a wedge-shaped structure, in order to better change the transmission direction of the light, multiple grooves can be opened on one side of the cylindrical component close to the light guide plate, and the bottom of the groove can be square, fan-shaped, circular, etc., so that this side is designed as a toothed surface to form multiple deflection surfaces. When the light is transmitted from the second surface of the light guide plate to the multiple deflection surfaces, the multiple deflection surfaces can fully reflect this part of the light, so that the reflected light is transmitted along the second direction and is fully blocked or absorbed by the first light shielding layer on the second surface of the light guide plate, thereby effectively reducing the light output to the light-increasing component.

[0102] In other embodiments, if the light deflection component is a protruding structure arranged on the cylindrical component, wherein the shape of the protruding structure can be set arbitrarily, such as a triangle, a cone or a square, etc., the side of the protruding structure facing the light guide plate is a deflection surface, ensuring that the angle between the deflection surface and the first surface of the light guide plate is an obtuse angle, the deflection surface can reflect the light output from the second surface of the light guide plate, and the reflected light can be fully blocked or absorbed by the first shading layer on the second surface of the light guide plate, thereby reducing the light output to the light enhancement component.

[0103] In the disclosed embodiment, since the angle between the deflection surface of the light deflection component and the first surface of the light guide plate is an obtuse angle, after the light output from the second surface of the light guide plate is transmitted to the deflection surface, the deflection surface can fully reflect the light to a second direction different from the first direction, thereby effectively reducing the light transmitted to the light enhancement component, which is beneficial to reducing the impact of bright strips formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen.

[0104] Figure 6 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 6 ,like Figure 6 As shown, the light deflection assembly 105 includes:

[0105] At least one first protrusion 107 , each first protrusion 107 forms a deflection surface facing the surface of the light guide plate 101 .

[0106] It is understandable that in order to fully reduce the light transmitted to the light enhancement component, the light deflection component includes multiple first protrusions, each of which forms a deflection surface facing the surface of the light guide plate, thereby forming multiple deflection surfaces to fully reflect the light.

[0107] In some embodiments, in order to fully reflect the light output from the second surface of the light guide plate, the first protrusions can be arranged at intervals, and each first protrusion forms a deflection surface facing the surface of the light guide plate, and each deflection surface is parallel. When the light is transmitted from the second surface of the light guide plate to the multiple deflection surfaces, the multiple deflection surfaces can fully reflect this part of the light, so that the reflected light is transmitted along the second direction.

[0108] Here, the shape of the first protrusion can be set arbitrarily, such as a cone, a quadrilateral or a column, etc., as long as the first protrusion forms a deflection surface facing the surface of the light guide plate, and the embodiment of the present disclosure is not limited to this.

[0109] In some embodiments, the first protrusion is a cone member, each cone member is continuously spaced and arranged, the protrusion height of each cone member is the same, and each cone member forms a deflection surface facing the surface of the light guide plate.

[0110] In other embodiments, the first protrusion is a columnar component, the columnar components are arranged continuously and spaced apart, the protrusion height of each columnar component is the same, and each columnar component forms a deflection surface facing the surface of the light guide plate.

[0111] In the disclosed embodiment, the light deflection assembly includes: at least one first protrusion, each of which forms a deflection surface facing the surface of the light guide plate. Thus, by providing a plurality of first protrusions to form a plurality of deflection surfaces, the transmission direction of the light output from the second surface of the light guide plate can be fully changed, thereby effectively reducing the light output to the light-increasing assembly and avoiding the situation where light leaks out of the frame of the backlight module.

[0112] Figure 7 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 7 ,like Figure 2 and Figure 7As shown, the backlight module 100 includes:

[0113] The frame 103 , the side of the frame 103 facing the light guide plate 101 is reused as the deflection surface of the light deflection component 105 .

[0114] It should be explained that the backlight module also includes a frame, and the side of the frame facing the light guide plate can be reused as the deflection surface of the light deflection component, so that the frame and the light deflection component are an integrated structure, thereby reducing the number of components in the backlight module while also reducing the light output to the light enhancement component.

[0115] Here, the frame may be a plastic frame, or an iron frame and a plastic frame arranged on the upper layer of the iron frame, and the embodiments of the present disclosure are not limited to this.

[0116] In some embodiments, if the frame is a plastic frame, a plastic frame is disposed on the periphery of the backlight module, and the components in the backlight module are fixed by the plastic frame, wherein the material of the plastic frame is plastic, resin, etc. A base is disposed inside the plastic frame, and the components in the backlight module are fixed by arranging them on the base and combining the fixing function of the plastic frame. A reflective sheet is disposed on the base, and the light is reflected by the reflective sheet, so that the light displayed on the display screen can be more uniform.

[0117] In other embodiments, if the frame is an L-shaped iron frame and a plastic frame arranged on the upper layer of the L-shaped iron frame, wherein the L-shaped iron frame is a bracket made of metal material and can be made of alloy, the L-shaped iron frame and the plastic frame can be used to assemble the components in the backlight module according to the corresponding positions. A reflective sheet is arranged on the L-shaped iron frame to reflect light. The light guide plate is stacked on the reflective sheet and is bonded to the reflective sheet; at the same time, the light guide plate and the reflective sheet are both arranged on the inner side of the plastic frame, and the light guide plate and the reflective sheet are fixed by the plastic frame.

[0118] like Figure 1 As shown, the distance between the end of the frame away from the light-enhancing component and the light guide plate is equal to the distance between the end of the frame close to the light-enhancing component and the light guide plate. Therefore, after the light is output from the second surface of the light guide plate to the frame, the frame will reflect the light to the light-enhancing component, resulting in light leakage.

[0119] Based on this, in some embodiments, the side of the glue frame facing the light guide plate can be reused as the deflection surface of the light deflection component, so that the distance between the end of the glue frame away from the light enhancement component and the light guide plate is greater than the distance between the end of the glue frame close to the light enhancement component and the light guide plate, so as to reflect the light to a second direction different from the first direction.

[0120] In the disclosed embodiment, the backlight module includes: a frame, and the side of the frame facing the light guide plate is reused as the deflection surface of the light deflection component. In this way, the frame and the light deflection component can be an integrated structure, which can not only reduce the number of components inside the backlight module, but also fully reflect the light and reduce the light output to the light enhancement component.

[0121] Figure 8 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 8 ,like Figure 8 As shown, the frame 103 includes:

[0122] At least one second protrusion 108 is disposed on the side of the frame 103 facing the light guide plate 101 , and each second protrusion 108 forms a deflection surface on the surface facing the light guide plate 101 .

[0123] Here, if Figure 8 As shown, the frame 103 and the at least one second protrusion 108 are an integrally formed structure, and together constitute a light deflection component.

[0124] It can be understood that, on the basis of reusing the side of the frame facing the light guide plate as the deflection surface of the light deflection component, at least one second protrusion can be set on the side of the frame facing the light guide plate, so that each second protrusion forms a deflection surface facing the surface of the light guide plate, so as to form multiple deflection surfaces, so as to fully reflect the light output from the second surface of the light guide plate, so that the reflected light is transmitted along the second direction, thereby reducing the light transmitted to the light enhancement component.

[0125] In some embodiments, when there are multiple second protrusions, the second protrusions can be arranged at intervals, and each second protrusion forms a deflection surface facing the surface of the light guide plate. Each deflection surface is parallel, and when the light is transmitted from the second surface of the light guide plate to the multiple deflection surfaces, the multiple deflection surfaces can fully reflect this part of the light, so that the reflected light is transmitted along the second direction.

[0126] Here, the number of second protrusions can be set arbitrarily, and the shape of the second protrusions can also be set arbitrarily, such as a cone, a quadrilateral or a cylinder, etc. It is only necessary to ensure that the second protrusions form a deflection surface facing the surface of the light guide plate, and the embodiments of the present disclosure are not limited to this.

[0127] In some embodiments, the second protrusion is a cone member, each cone member is continuously spaced and arranged, the protrusion height of each cone member is the same, and each cone member forms a deflection surface facing the surface of the light guide plate.

[0128] In some embodiments, if the frame is a plastic frame, the plastic frame is set to a wedge-shaped structure, and a plurality of second protrusions can be set on the side of the plastic frame facing the light guide plate, so that after the light is output from the second surface of the light guide plate and reaches the surface of each second protrusion facing the light guide plate, it is reflected by the surface. Since the plastic frame is a wedge-shaped structure, the reflected light will be transmitted along the second direction, which can reduce the light transmitted along the first direction, thereby reducing the light transmitted to the light-increasing component, and can effectively avoid the problem of light leakage from the frame of the backlight module.

[0129] In the disclosed embodiment, the frame includes: at least one second protrusion, which is arranged on the side of the frame facing the light guide plate, and each second protrusion forms a deflection surface on the surface facing the light guide plate. In this way, on the basis that the side of the frame facing the light guide plate has been reused as the deflection surface of the light deflection component, by providing multiple second protrusions and then forming multiple deflection surfaces, the reflection effect of light can be enhanced, so that the light reflected by the deflection surface is transmitted along the second direction, thereby effectively reducing the light transmitted to the light enhancement component.

[0130] Fig. 9 is a schematic diagram of a structure of a backlight module according to an exemplary embodiment Figure 9 ,like Figure 8-Figure 9 As shown, the light enhancement component 102 includes:

[0131] Upper brightening film 201;

[0132] The backlight module 100 includes:

[0133] The second light shielding layer 104 extends from the frame 103 to a side of the upper brightness enhancement film 201 facing away from the light guide plate 101 , and a portion of the second light shielding layer 104 covers an edge of the upper brightness enhancement film 201 .

[0134] It can be understood that the light enhancement component includes an upper light enhancement sheet. In order to reduce the impact of light leakage, the backlight module also includes a second light shading layer. The second light shading layer is arranged on the side extending from the frame to the upper light enhancement sheet facing away from the light guide plate, and part of the second light shading layer covers the edge of the upper light enhancement sheet, so that after the light transmitted through the second surface of the light guide plate is output to the frame, the second light shading layer can absorb a part of the light, thereby effectively suppressing the light transmitted from the second surface of the light guide plate to the light enhancement component.

[0135] Here, the material of the second light shielding layer can be the same as or different from the material of the first light shielding layer. The shape of the first light shielding layer can be set arbitrarily, and the embodiment of the present disclosure does not limit this.

[0136] In some embodiments, the second shading layer can be a black and white shading glue, which is simultaneously attached to the edge of the upper brightening film and the glue frame, thereby fixing the film material between the glue frame and the black and white shading glue while absorbing or blocking light.

[0137] In the disclosed embodiment, the light enhancement component includes: an upper light enhancement sheet; the backlight module includes: a second light shielding layer; the second light shielding layer extends from the frame to the side of the upper light enhancement sheet facing away from the light guide plate, and a portion of the second light shielding layer covers the edge of the upper light enhancement sheet. In this way, the light transmitted from the second surface of the light guide plate to the upper light enhancement sheet can be effectively suppressed, thereby reducing the light output to the upper light enhancement sheet and avoiding the problem of light leakage.

[0138] In some embodiments, Fig. 9 As shown, the brightness enhancement component 102 includes: a diffusion sheet 203, a lower brightness enhancement sheet 202;

[0139] The diffusion sheet 203 and the lower brightness enhancement sheet 202 are stacked on the light guide plate 101 .

[0140] In some embodiments, the diffuser is stacked on the first surface of the light guide plate, and the light guide plate has light guide points of various densities and sizes. The diffuser can make the light guide plate evenly scatter light, thereby improving the efficiency of light use.

[0141] In other embodiments, the lower brightness enhancement sheet is disposed on the surface of the diffuser facing away from the light guide plate. When light passes through the diffuser, the diffuser can cause more refraction, reflection and scattering of the light, thereby correcting the light to become uniform light to achieve an optical diffusion effect.

[0142] In the disclosed embodiment, the light enhancement component includes a diffuser and a lower light enhancement sheet. By stacking the diffuser and the lower light enhancement sheet on a light guide plate, light transmitted from the first surface of the light guide plate can be processed to provide a uniform surface light source for the electronic device, thereby ensuring the display effect of the electronic device.

[0143] The disclosed embodiment further provides a display screen, which includes the backlight module described in any one of the above embodiments.

[0144] In the disclosed embodiment, the display screen includes a backlight module, which includes a light guide plate, a light enhancement component and a light deflection component. The light enhancement component and the light guide plate are stacked, and the light output from the first surface of the light guide plate is transmitted to the light enhancement component along a first direction; at least a portion of the deflection surface of the light deflection component is opposite to the second surface of the light guide plate, and the light output from the second surface of the light guide plate is transmitted to the deflection surface, and is reflected by the deflection surface and transmitted in the second direction; wherein the first direction is different from the second direction.

[0145] In this way, the embodiment of the present disclosure sets a light deflection component so that the light output from the second surface of the light guide plate is transmitted to the deflection surface, and then reflected by the deflection surface to a second direction different from the first direction for transmission. Since the second direction is different from the first direction, the light transmission direction can be changed to reduce the light transmitted to the light-enhancing component, which is beneficial to reducing the impact of bright bars formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen, thereby helping to improve the user's viewing experience.

[0146] The disclosed embodiment further provides an electronic device, which includes the display screen described in the above embodiment.

[0147] In the embodiments of the present disclosure, the electronic devices may include mobile terminal devices, smart home devices, or transportation devices, etc. The mobile terminal devices may include mobile phones or tablet computers; the smart home devices may include home monitors; and the transportation devices may include cars.

[0148] In the disclosed embodiment, the electronic device includes a display screen, which can reduce the light transmitted to the light-enhancing component by changing the transmission direction of the light, thereby reducing the impact of bright strips formed by light leakage in the edge area of ​​the backlight module on the display effect of the screen, thereby helping to improve the user's viewing experience.

[0149] Regarding the electronic device in the above embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.

[0150] Fig.10 8 is a block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0151] Reference Fig.10 , the electronic device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0152] The processing component 802 generally controls the overall operation of the electronic device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0153] The memory 804 is configured to store various types of data to support operations on the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0154] The power supply component 806 provides power to the various components of the electronic device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 800.

[0155] The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0156] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the electronic device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0157] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0158] The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the electronic device 800. For example, the sensor assembly 814 can detect the open / closed state of the device 800, the relative positioning of components, such as the display and keypad of the electronic device 800, and the sensor assembly 814 can also detect the position change of the electronic device 800 or a component of the electronic device 800, the presence or absence of contact between the user and the electronic device 800, the orientation or acceleration / deceleration of the electronic device 800, and the temperature change of the electronic device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0159] The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0160] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0161] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, commodity or device including the element.

[0162] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0163] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A backlight module, characterized in that: include: Light guide plate; A light-increasing component is stacked with the light guide plate, and the light output from the first surface of the light guide plate is transmitted to the light-increasing component along a first direction; A light deflection component, wherein at least a portion of a deflection surface of the light deflection component is opposite to the second surface of the light guide plate, and light output from the second surface of the light guide plate is transmitted to the deflection surface and reflected by the deflection surface to be transmitted in a second direction; The first direction is different from the second direction.

2. The backlight module according to claim 1, characterized in that: The backlight module comprises: A first light shielding layer, located between the second surface of the light guide plate and the light deflection assembly; The intensity of the light output from the first light shielding layer is less than the intensity of the light input into the first light shielding layer.

3. The backlight module according to claim 2, characterized in that: The first light shielding layer is formed on the second surface of the light guide plate.

4. The backlight module according to claim 1, characterized in that: The angle between the deflection surface of the light deflection component and the first surface of the light guide plate is an obtuse angle.

5. The backlight module according to any one of claims 1 to 4, characterized in that: The light deflection component comprises: At least one first protrusion, each of the first protrusions forms a deflection surface on a surface facing the light guide plate.

6. The backlight module according to any one of claims 1 to 4, characterized in that: The backlight module comprises: Frame; The side surface of the frame body facing the light guide plate is reused as the deflection surface of the light deflection component.

7. The backlight module according to claim 6, characterized in that: The frame comprises: At least one second protrusion is arranged on the side of the frame body facing the light guide plate, and the surface of each second protrusion facing the light guide plate forms a deflection surface.

8. The module according to claim 6, characterized in that: The light-enhancing component comprises: Apply brightening film; The backlight module comprises: The second light shielding layer extends from the frame to a side of the upper brightness enhancement sheet facing away from the light guide plate, and a portion of the second light shielding layer covers an edge of the upper brightness enhancement sheet.

9. The module according to any one of claims 7 to 8, characterized in that: The light-enhancing component comprises: Diffuser; Lower brightness enhancement film; Wherein, the diffusion sheet and the lower brightness enhancement sheet are stacked on the light guide plate.

10. A display screen, characterized in that: The display screen comprises the backlight module according to any one of claims 1 to 9.

11. An electronic device, characterized in that: The electronic device comprises the display screen according to claim 10.

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