A backlight module and display panel

Abstract

This utility model provides a backlight module and a display panel. The backlight module includes: a back plate; a side plate disposed on one side edge of the back plate, the side plate and the back plate forming a cavity; a light guide plate disposed in the cavity, one side of the light guide plate being at least partially bonded to the side plate, and the side of the light guide plate away from the bonded side having at least one first protrusion, and the side of the side plate close to the first protrusion having a first groove adapted to the first protrusion.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight module and display panel. Background Technology

[0002] Liquid Crystal Display (LCD) mainly consists of a liquid crystal panel and a backlight. With the continuous development of LCD technology, various smart display devices have increasingly higher requirements for displays. The pursuit of larger sizes and higher optical specifications has become a trend. Therefore, while meeting the demand for larger sizes, avoiding display defects or instability is also a future trend. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a backlight module and display panel that solves or at least partially overcomes the above problems.

[0004] To achieve the above objectives, a first aspect of this utility model provides a backlight module, comprising:

[0005] Back panel;

[0006] A side plate is disposed on one side edge of the back plate, and the side plate and the back plate form a cavity;

[0007] A light guide plate is disposed within the cavity. At least one side of the light guide plate is bonded to the side plate, and the side of the light guide plate away from the bonded side is provided with at least one first protrusion. The side plate is provided with a first groove adapted to the first protrusion on the side close to the first protrusion.

[0008] Optionally, a reflective sticker is provided on the side of the first protrusion facing the bottom of the first groove.

[0009] Optionally, the light guide plate has at least one second protrusion at the edge facing the back plate, and the back plate has a second groove that matches the second protrusion on the side facing the light guide plate.

[0010] Optionally, the light guide plate has an optical film layer on the side away from the back plate, and at least two third protrusions are provided on the edge of the light guide plate facing the optical film layer, and the optical film layer has a third groove adapted to the third protrusions.

[0011] Optionally, the light guide plate has at least two fourth protrusions on the side facing the side plate, and the side plate has a fourth groove adapted to the fourth protrusions on the side close to the fourth protrusions.

[0012] The optical film layer has a first lug that is adapted to the fourth groove on the side facing the fourth groove;

[0013] The third protrusion is disposed on the side of the fourth protrusion facing the optical film layer, and the third groove is disposed on the first lug.

[0014] Optionally, a fixing tape is provided between the light guide plate and the optical film layer; a backlight is provided between the light guide plate and the side plate;

[0015] The fixing tape has a plurality of fifth grooves evenly distributed on the side opposite to the backlight; wherein the plurality of fifth grooves are evenly distributed along the extension direction of the fixing tape, and the orthographic projection of the backlight on the side plate is located within the orthographic projection range of the plurality of fifth grooves on the side plate.

[0016] Optionally, the dimensions of the plurality of fifth grooves facing the backlight are larger than the dimensions of the grooves away from the backlight.

[0017] Optionally, the third protrusion is distributed along the first direction, and the third protrusion is located on the side of the light guide plate away from the first protrusion; a light shield is provided on the side of the light guide plate facing the optical film layer, the light shield has an opening, and the light shield is disposed on the third protrusion through the opening ring; wherein the first direction is the length direction of the light guide plate.

[0018] Optionally, the third protrusion is located on the side of the light guide plate away from the first protrusion and close to the side plates at opposite ends along the first direction; a light shield is provided on the side of the light guide plate facing the optical film layer, and the light shield is located on the side close to the third protrusion and at a first distance from the third protrusion.

[0019] The contour of the side of the light-shielding plate away from the first boss is adapted to the contour of the first lug.

[0020] Optionally, the side plate includes at least a first side, a second side, a third side, and a fourth side, wherein the side where the light guide plate is bonded to the side plate, the second boss, the third boss, the fourth boss, and the fixing tape are all disposed on the side facing the fourth side.

[0021] A second aspect of this utility model provides a display panel including the backlight module described in the first aspect.

[0022] As can be seen from the above description, the backlight module and display panel provided by this utility model, through the cooperation of the first boss and the first groove, use the first boss embedded in the first groove to prevent the light guide plate from shaking relative to the side plate and avoid friction between the light guide plate and the side plate. The second boss is embedded in the second groove to prevent the light guide plate from shaking relative to the base plate, avoiding wrinkles and other problems caused by light guide plate misalignment, which would affect display stability.

[0023] Further, reflective stickers are used to supplement the light on the first protrusion, preventing the first groove from absorbing light and causing the corresponding area of ​​the first protrusion to appear dark. The fourth protrusion and fourth groove work together to fix the optical film layer while avoiding the negative impact of bright spots caused by being too close to the display area. Combined with a light-shielding sheet, the light-gathering effect of the light guide plate at the third protrusion is effectively reduced, resulting in uniform brightness of the display panel and eliminating potential bright spots on the third protrusion. Multiple fifth grooves are evenly distributed on the side of the fixing tape opposite the backlight; these fifth grooves are serrated along the extension direction of the fixing tape. The serrated parts (fifth grooves) can effectively absorb light from the central high-brightness area of ​​the backlight, thus avoiding uneven brightness. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of the backlight module according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Enlarged cross-sectional view at point A in the middle;

[0027] Figure 3 This is a schematic diagram of a limit block in related technologies;

[0028] Figure 4 This is a schematic diagram of the second boss in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the fourth boss in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram illustrating the principle of light and shadow effects when fixing adhesive tape in related technologies.

[0031] Figure 7 This is a schematic diagram illustrating the principle of the fixing tape used to improve light and shadow in this utility model;

[0032] Figure 8 This is a schematic diagram of a light-shielding sheet according to the present invention;

[0033] Figure 9 This is a schematic diagram of another light-shielding sheet design of this utility model. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] As described in the background section, with the continuous development of LCD technology, various smart display devices have increasingly higher requirements for displays, and the pursuit of larger sizes and higher optical specifications has become a trend. Compared with traditional small-sized display panels, large-size display panels (≥20 inches) present the following challenges for backlight modules: First, in reliability tests or environments such as high and low temperatures and vibration, the physical properties of the light guide plate and optical film cause thermal expansion and contraction. Simultaneously, the fixing method of the light guide plate may cause it and the optical film to wobble. Prolonged wobble can lead to friction between the light guide plate and optical film and other components, further causing white spots on the display. Furthermore, because the light guide plate and optical film of large-size display panels are correspondingly larger and heavier, combined with the characteristics of thermal expansion and contraction, they may be squeezed against other components (such as the frame), causing wrinkles in the light guide plate and affecting the stable display. Secondly, the light guide plate improves and enhances the light transmission efficiency through reasonable dot design, enabling better light conduction and diffusion. For large-size displays, large-size light guide plates are required. Due to the structural design of the light guide plate in the display, it is difficult to meet the requirements for optical uniformity. To achieve stable display with a large-size light guide plate, the dot pattern needs to be adjusted, which is time-consuming and difficult.

[0037] Based on this, the purpose of this application is to propose a backlight module that achieves reasonable fixation between the light guide plate and other components, while enabling the light guide plate to better conduct and diffuse light, thereby achieving optical uniformity.

[0038] refer to Figure 1 , Figure 2 As shown, this application embodiment provides a backlight module, including: a back plate 1; a side plate 2 disposed on one side edge of the back plate 1, the side plate 2 and the back plate 1 forming a cavity; a light guide plate 3 disposed in the cavity, one side of the light guide plate 3 being at least partially bonded to the side plate 2, and the side of the light guide plate 3 away from the bonded side being provided with at least one first protrusion 31, and the side of the side plate 2 adjacent to the first protrusion 31 being provided with a first groove 32 adapted to the first protrusion 31.

[0039] In an exemplary embodiment, the light guide plate 3 and the side plate 2 are bonded together with double-sided adhesive tape.

[0040] In an exemplary embodiment, the shape of the back plate 1 can be rectangular or any polygon. In this embodiment, a rectangle is used as an example for the following description.

[0041] In an exemplary embodiment, the side where the light guide plate 3 is bonded to the side plate 2 is as follows: Figure 1 One side extending along the X direction.

[0042] In an exemplary embodiment, the side where the light guide plate 3 is bonded to the side plate 2 is... Figure 1 The side closest to the lower side panel 2.

[0043] For example, the light guide plate 3 can be made of polymethyl methacrylate (PMMA) or polycarbonate (PC).

[0044] In related technologies, such as Figure 1 As shown, the side of the light guide plate 3 extending along the X direction is fixed with double-sided tape, thereby fixing the light guide plate 3 to the side plate 2. However, for large-size displays, the corresponding light guide plate 3 is also large, and fixing it to one side cannot effectively fix the light guide plate 3. In environments with vibration or potential impact, the opposite side of the fixed side of the light guide plate 3 will wobble in the vertical direction, i.e., along the Z direction, causing wear and tear on the light guide plate 3 and resulting in display defects, such as white spots, white lines, and other wear and scratches at the wear location.

[0045] refer to Figure 1 , Figure 2 As shown, one side of the light guide plate 3 is at least partially bonded to the side plate 2. A first protrusion 31 is provided on the side opposite to the bonded side. Correspondingly, a first groove 32 adapted to the first protrusion 31 is provided on the side of the side plate 2 that is close to the first protrusion 31. That is, the side opposite to the bonded side is inserted into the first groove 32 through the first protrusion 31 to prevent the light guide plate 3 from shaking in the vertical direction, that is, along the Z direction, and to avoid friction between the light guide plate 3 and the side plate 2.

[0046] In an exemplary embodiment, the first boss 31 has a length of 10 mm and a width of 2.5 mm. The length of the first boss 31 represents the dimension along the X direction, and the width represents the dimension along the Z direction.

[0047] In an exemplary embodiment, there are four first bosses 31 and four first grooves 32.

[0048] In some implementations, such as Figure 2 As shown, the first protrusion 31 has a reflective sticker 33 on the side facing the bottom of the first groove 32.

[0049] In this embodiment, due to the presence of the first protrusion 31, the light guide plate 3 cannot effectively set dots at the first protrusion 31 to achieve uniform light guiding. Simultaneously, because the first protrusion 31 is embedded in the first groove 32, the absorption and blocking of light by the first groove 32 causes the display at the position of the first protrusion 31 to appear dark. To avoid this darkening, a reflective sticker 33 is provided on the side of the first protrusion 31 facing the bottom of the first groove 32 to supplement the light at the position of the first protrusion 31.

[0050] In some embodiments, such as Figure 4As shown, the light guide plate 3 has at least one second protrusion 34 on one side edge facing the back plate 1, and the back plate 1 has a second groove 35 on one side facing the light guide plate 3 that matches the second protrusion 34.

[0051] In related technologies, such as Figure 3 As shown, in addition to fixing the light guide plate 3 to the side plate 2 bracket with double-sided tape, the light guide plate 3 is also fixed along the X and Y directions by setting an elastic limiting block 11 at the corner between the side plates 2. The light guide plate 3 is limited and fixed by the interference fit between the light guide plate 3 and the limiting block 11. For example, the limiting block 11 can be a rubber fiber block. However, due to the large size and weight of the light guide plate 3, the elasticity of the limiting block 11 is not enough to effectively fix the position of the light guide plate 3. Under environments such as vibration and impact, problems such as wrinkles caused by the displacement of the light guide plate 3 may easily occur.

[0052] By engaging at least one second protrusion 34 with the second groove 35, the second protrusion 34 is inserted into the second groove 35, thus preventing the light guide plate 3 from moving along the X and Y directions and avoiding problems such as wrinkles caused by the offset of the light guide plate 3.

[0053] In an exemplary embodiment, the number of second bosses 34 can be two.

[0054] In an exemplary embodiment, the second boss 34 is disposed near the side where the light guide plate 3 is bonded to the side plate 2, that is, the second boss 34 is disposed on the side where the frame is wider.

[0055] In an exemplary embodiment, the second boss 34 can have a length of 3mm, a width of 2.5mm, and a height of 1.55mm. The length of the second boss 34 represents the dimension along the X direction, the width represents the dimension along the Y direction, and the height represents the dimension along the Z direction.

[0056] In some embodiments, such as Figure 2 , Figure 4 As shown, an optical film layer 4 is provided on the side of the light guide plate 3 away from the back plate 1. At least two third protrusions 36 are provided on the edge of the light guide plate 3 facing the optical film layer 4, and the optical film layer 4 is provided with third grooves 37 adapted to the third protrusions 36. In an exemplary embodiment, the optical film layer 4 may include a first diffuser 41, a first prism layer 42, a second prism layer 43, and a second diffuser 44 stacked sequentially. The light source emits light uniformly through the light guide plate 3, the first diffuser 41, the first prism layer 42, the second prism layer 43, and the second diffuser 44.

[0057] In an exemplary embodiment, the optical film layer 4, on the side away from the light guide plate 3, is sequentially provided with a lower polarizer, a thin film transistor glass (TFT glass), a color filter glass (CF glass), and an upper polarizer.

[0058] In an exemplary embodiment, a liquid crystal layer, pixel electrodes, and a common electrode (not shown in the figure) are also included between the thin-film transistor substrate and the color filter substrate. By applying a voltage to the pixel electrode, the pixel electrode forms a circuit by connecting the common electrode through the liquid crystal layer. It is determined that the liquid crystal layer is deflected. By changing the applied voltage, the deflection angle of the liquid crystal molecules in the liquid crystal layer is controlled, thereby adjusting the brightness of the thin-film transistor substrate in the corresponding area, and finally displaying the desired color from the color filter substrate.

[0059] In this embodiment, similar to the light guide plate 3, the optical film layer 4 also needs to be fixed to avoid friction and displacement. After fixing the light guide plate 3 relative to the base plate using the first protrusion 31 and the first groove 32, as well as the second protrusion 34 and the second groove 35, at least two third protrusions 36 and third grooves 37 on the edge of the light guide plate 3 facing the optical film layer 4 are further used to fix the optical film layer 4 relative to the light guide plate 3. The third protrusions 36 are embedded in the third grooves 37 to fix the optical film layer 4 relative to the light guide plate 3, thereby fixing the optical film layer 4 relative to the base plate and preventing wear or displacement of the optical film layer 4 due to shaking.

[0060] It is understandable that when there are fewer than two third protrusions 36, the optical film layer 4 and the light guide plate 3 can achieve relative rotation using the third protrusions 36 and the third groove 37, thus failing to effectively fix the optical film layer 4. Therefore, the number of third protrusions 36 is at least two.

[0061] It should be noted that a display panel or display screen may include a display area and a non-display area surrounding the display area. The display area is used for displaying images or pictures, while the non-display area is used for wiring and the setting of necessary physical structures. When fixing the optical film layer 4, the third protrusion 36 and the third groove 37 are both located in the non-display area to avoid interfering with the normal display of the display panel or display screen.

[0062] In some embodiments, such as Figure 5 , Figure 8 , Figure 9As shown, the light guide plate 3 has at least two fourth protrusions 38 on the side facing the side plate 2, and the side plate 2 has a fourth groove (not shown in the figure) adapted to the fourth protrusions 38 on the side close to the fourth protrusions 38; the optical film layer 4 has a first lug 45 adapted to the fourth groove on the side facing the fourth groove; the third protrusion 36 is disposed on the side of the fourth protrusion 38 facing the optical film layer 4, and the third groove 37 is disposed on the first lug 45.

[0063] In this embodiment, since the third protrusion 36 is disposed on the light guide plate 3, dot matrix cannot be set at the location of the third protrusion 36 on the light guide plate 3, resulting in bright spots appearing at the location of the third protrusion 36 on the light guide plate 3. Correspondingly, these bright spots will also appear on the optical film layer 4. The further the third protrusion 36 is from the display area, the farther the bright spots are from the display area, and the higher the yield of the display panel or display screen. In order to further improve the yield of the display panel, a fourth protrusion 38 is provided to cooperate with the fourth groove on the side plate 2 and extend to the side away from the display area, which can effectively reduce the adverse effects of the bright spots caused by the third protrusion 36. At the same time, the third protrusion 36 and the third groove 37 are also embedded in the fourth groove of the side plate 2 to achieve effective fixation of the optical film layer 4.

[0064] In an exemplary embodiment, there are four third protrusions 36, respectively distributed as follows: Figure 5 The light guide plate 3 shown includes its left, left-center, right-center, and right sides. The third protrusion 36 is symmetrical along the Y direction.

[0065] In some embodiments, such as Figure 7 As shown, a fixing tape 51 is provided between the light guide plate 3 and the optical film layer 4, and a backlight 52 is provided between the light guide plate 3 and the side plate 2; a plurality of fifth grooves 53 are evenly distributed on the side opposite to the fixing tape 51 and the backlight 52; the plurality of fifth grooves 53 are evenly distributed along the extension direction of the fixing tape 51, and the orthographic projection of the backlight 52 on the side plate 2 is located within the orthographic projection range of the plurality of fifth grooves 53 on the side plate 2.

[0066] In an exemplary embodiment, the backlight 52 can be an LED lamp bead.

[0067] It is understood that in this embodiment of the application, the backlight 52 is disposed on the side plate 2. Therefore, the side where the light guide plate 3 and the side plate 2 are bonded is partially bonded, rather than the entire side of the side where the light guide plate 3 and the side plate 2 are bonded is bonded together. As long as it can play a fixing role, it is acceptable.

[0068] In this embodiment, the optical film layer 4 is fixed relative to the light guide plate 3 in the X and Y directions by the cooperation of at least two third protrusions 36 and third grooves 37. In the Z direction, the optical film layer 4 is fixed between the light guide plate 3 and the optical film layer 4 by fixing tape 51 to prevent the optical film layer 4 from moving relative to the light guide plate 3.

[0069] Furthermore, on large-sized, narrow-bezel display panels, the backlight 52 mounted on the side panel 2 is relatively close to the display area. While the fixing tape 51 between the optical film layer 4 and the light guide plate 3 provides fixation, the dots on the light guide plate 3 located at the fixing tape 51 (within the projected area of ​​the fixing tape 51 on the base plate) are also obscured. These dots cannot effectively and evenly transmit light, causing the backlight 52 to cast shadows at this location, resulting in uneven brightness. (Reference) Figure 6 The diagram shows the principle of light and shadow appearing on the fixed tape 51. Since the light-emitting area formed by the backlight 52 is a fan-shaped area, the brightness in the center of the backlight 52 will be higher than that at the junction of adjacent backlights 52.

[0070] like Figure 7 As shown, in order to avoid uneven brightness, multiple fifth grooves 53 are evenly distributed on the side of the fixing tape 51 opposite to the backlight 52. The multiple fifth grooves 53 are serrated along the extension direction of the fixing tape 51. The serrated part (fifth groove 53) can effectively absorb the light of the central high-brightness part of the backlight 52, thereby avoiding uneven brightness.

[0071] In an exemplary embodiment, in order to make the display panel or display screen have uniform light effect, the size of the fifth groove 53 can be adjusted to adapt to the backlight 52.

[0072] In some embodiments, the size of the plurality of fifth grooves 53 facing the backlight 52 is larger than the size of the side away from the backlight 52.

[0073] Here, the dimension represents the length along the X direction.

[0074] In an exemplary embodiment, the fifth groove 53 has a dimension of 4.2 mm on the side facing the side plate 2, and a dimension of 2.8 mm on the side away from the backlight 52.

[0075] In an exemplary embodiment, the cross-sectional shape of the fifth groove 53 can be as follows: Figure 7 The trapezoid shown can also be an arc (not shown in the figure).

[0076] By making the fifth groove 53 smaller on the side away from the backlight 52 than on the side facing the backlight 52, the contact area between the light from the bright part in the center of the backlight 52 and the fifth groove 53 is increased, effectively absorbing the light from the bright part in the center of the backlight 52, thus more effectively avoiding uneven brightness.

[0077] In some embodiments, such as Figure 9As shown, the third protrusion 36 is distributed along the first direction, and the third protrusion 36 is located on the side of the light guide plate 3 away from the first protrusion 31; a light shield 61 is provided on the side of the light guide plate 3 facing the optical film layer 4, and the light shield 61 has an opening 62, and the light shield 61 is arranged around the third protrusion 36 through the opening 62; wherein the first direction is the length direction of the light guide plate.

[0078] In an exemplary embodiment, the first direction is as follows: Figure 1 and Figure 5 The X direction is shown.

[0079] In an exemplary implementation, such as Figure 5 As shown, the third protrusion 36 is located at the left-center and right-center positions of the light guide plate 3 away from the first protrusion 31, and corresponds to the fourth protrusion 38.

[0080] After the optical film layer 4 is fixed relative to the light guide plate 3 in the X and Y directions using the third protrusion 36 and the third groove 37, due to the presence of the third protrusion 36, even after extending towards the side plate 2 through the fourth protrusion 38, the display panel or display screen may still have slight bright spots at the corresponding position of the third protrusion 36.

[0081] By setting a light-shielding sheet 61 between the light guide plate 3 and the optical film layer 4 through the third protrusion 36, the light-focusing effect of the light guide plate 3 at the third protrusion 36 is effectively reduced, so that the brightness of the display panel is uniform.

[0082] In an exemplary implementation, such as Figure 9 As shown, the light-shielding layer corresponding to the third protrusion 36 at the left-center and right-center positions can be 13mm in length and 3.2mm in width. It should be noted that the length refers to the length along the X direction, and the width refers to the width along the Y direction.

[0083] In some embodiments, such as Figure 8 As shown, the third protrusion 36 is located on the side of the light guide plate 3 away from the first protrusion 31; and close to the side plates 2 at opposite ends along the first direction; a light shield 61 is provided on the side of the light guide plate 3 facing the optical film layer 4, the light shield 61 is located on the side close to the third protrusion 36, and at a first distance from the third protrusion 36; the contour of the side of the light shield 61 away from the first protrusion 36 is adapted to the contour of the first lug 45.

[0084] In an exemplary implementation, such as Figure 5 As shown, the third protrusion 36 can also be located on the left and right sides of the light guide plate 3 away from the first protrusion 31, corresponding to the fourth protrusion 38.

[0085] In an exemplary embodiment, the first distance can be 1.5 mm. It should be noted that the size of the first distance is adjusted according to the size of the third boss 36.

[0086] Similar to the third protrusion 36 located on the left and right sides of the light guide plate 3 away from the first protrusion 31, this embodiment also utilizes the third protrusion 36 and the third groove 37 to fix the optical film layer 4 relative to the light guide plate 3 in the X and Y directions. Due to the presence of the third protrusion 36, even after extending towards the side plate 2 via the fourth protrusion 38, a slight bright spot phenomenon may still appear on the display panel or screen at the corresponding position of the third protrusion 36. Since the third protrusion 36 is located on the left and right sides of the light guide plate 3 away from the first protrusion 31, this slight bright spot phenomenon will appear on the side close to the third protrusion 36. By setting a light shield 61 on the side close to the third protrusion 36 between the light guide plate 3 and the optical film layer 4, and at a first distance from the third protrusion 36, the light-gathering effect of the light guide plate 3 at the third protrusion 36 is effectively reduced, making the brightness of the display panel uniform.

[0087] It should be noted that the third protrusion 36 can be located alone on the light guide plate 3 away from the first protrusion 31 at the left center or right center position, or the third protrusion 36 can be located on the left and right sides of the light guide plate 3 away from the first protrusion 31, or the third protrusion 36 can be located simultaneously on the left center and right center positions of the light guide plate 3 away from the first protrusion 31 as well as on the left and right sides of the light guide plate 3 away from the first protrusion 31.

[0088] In an exemplary implementation, such as Figure 8 As shown, the light-shielding layer corresponding to the third protrusion 36 at the left and right sides can be 19.5mm in length and 3.85mm in width.

[0089] In an exemplary embodiment, the light-shielding sheet 61 can be a black tape of the same material as the fixing tape 51. While providing light shielding, it further secures the light guide plate 3 and the optical film.

[0090] In some embodiments, the side plate 2 includes at least a first side, a second side, a third side, and a fourth side, wherein the side to which the light guide plate 3 is bonded to the side plate 2, the second boss 34, the third boss 36, the fourth boss 38, and the fixing tape 51 are all disposed on the side facing the fourth side.

[0091] In this embodiment, to achieve a narrow bezel design and facilitate a reasonable layout, structures that occupy the width of the bezel are placed on one side as much as possible. Common display panels, such as monitor panels, place structures that occupy the width of the bezel on the bottom bezel side, thereby achieving a narrow bezel design with a left bezel, top bezel, and a border.

[0092] In an exemplary embodiment, the first side, the second side, the third side, and the fourth side are respectively the left side plate, the upper side plate, the right side plate, and the lower side plate, or respectively the right side plate, the upper side plate, the left side plate, and the lower side plate; no specific limitation is made here.

[0093] In this embodiment, by bonding the light guide plate 3 to the side plate 2 on the fourth side, and setting the second protrusion 34, the third protrusion 36, the fourth protrusion 38 and the fixing tape 51 on the side facing the fourth side, a narrow bezel is achieved while effectively fixing the light guide plate 3 and the optical film layer 4, thereby improving the display quality.

[0094] Based on the same concept, embodiments of this application provide a display panel including the backlight module described in any of the above embodiments.

[0095] By adopting the backlight module in the above embodiments, a narrow bezel can be achieved while the light guide plate 3 and the optical film layer 4 can be effectively fixed, avoiding display defects caused by friction of the light guide plate 3. At the same time, it avoids the light guide plate 3 and the optical film layer 4 from being squeezed by other components due to the physical properties of thermal expansion and contraction, which would cause wrinkles in the light guide plate 3 and affect the display stability.

[0096] Further, reflective stickers 33 are used to supplement the light on the first protrusion 31, preventing the first groove 32 from absorbing light and causing the corresponding position of the first protrusion 31 to appear dark. The cooperation of the fourth protrusion 38 and the fourth groove with the third protrusion 36 and the third groove 37 not only fixes the optical film layer 4 but also avoids the adverse effects of bright spots caused by being too close to the display area. Furthermore, the light-shielding sheet 61 effectively reduces the light-gathering effect of the light guide plate 3 at the third protrusion 36, making the brightness of the display panel uniform and eliminating any potential bright spots on the third protrusion 36. Multiple fifth grooves 53 are evenly distributed on the side of the fixing tape 51 opposite to the backlight 52; these fifth grooves 53 are serrated along the extension direction of the fixing tape 51. The serrated portion (fifth groove 53) can effectively absorb the light from the central high-brightness part of the backlight 52, thereby avoiding uneven brightness.

[0097] Based on the same concept, this utility model also provides a display device, including the display panel described in any of the above embodiments.

[0098] In some alternative embodiments, the display device includes, but is not limited to, mobile phones, tablets, monitors, in-vehicle displays, televisions, digital displays, and advertising screens. Because the display device includes the aforementioned display panel, it possesses all the advantages of such a display panel.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0100] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A backlight module, characterized in that, include: Back panel; A side plate is disposed on one side edge of the back plate, and the side plate and the back plate form a cavity; A light guide plate is disposed within the cavity. At least one side of the light guide plate is bonded to the side plate, and the side of the light guide plate away from the bonded side is provided with at least one first protrusion. The side plate is provided with a first groove adapted to the first protrusion on the side close to the first protrusion.

2. The backlight module of claim 1, wherein, The first protrusion has a reflective sticker on the side facing the bottom of the first groove.

3. The backlight module of claim 1, wherein, The light guide plate has at least one second protrusion on the edge facing the back plate, and the back plate has a second groove on the side facing the light guide plate that matches the second protrusion.

4. The backlight module of claim 3, wherein, The light guide plate has an optical film layer on the side away from the back plate, and at least two third protrusions are provided on the edge of the light guide plate facing the optical film layer. The optical film layer has a third groove that matches the third protrusions.

5. The backlight module of claim 4, wherein, The light guide plate is provided with at least two fourth protrusions on the side facing the side plate, and the side of the side plate close to the fourth protrusions is provided with a fourth groove that is adapted to the fourth protrusions. The optical film layer has a first lug adapted to the fourth groove on the side facing the fourth groove; The third protrusion is disposed on the side of the fourth protrusion facing the optical film layer, and the third groove is disposed on the first lug.

6. The backlight module of claim 5, wherein, A fixing tape is provided between the light guide plate and the optical film layer; a backlight is provided between the light guide plate and the side plate; The fixing tape has a plurality of fifth grooves evenly distributed on the side opposite to the backlight; wherein the plurality of fifth grooves are evenly distributed along the extension direction of the fixing tape, and the orthographic projection of the backlight on the side plate is located within the orthographic projection range of the plurality of fifth grooves on the side plate.

7. The backlight module of claim 6, wherein, The dimensions of the plurality of fifth grooves facing the backlight are larger than the dimensions of the grooves away from the backlight.

8. The backlight module of claim 6, wherein, The third protrusion is distributed along the first direction, and the third protrusion is located on the side of the light guide plate away from the first protrusion; a light shield is provided on the side of the light guide plate facing the optical film layer, the light shield has an opening, and the light shield is disposed on the third protrusion through the opening ring; wherein the first direction is the length direction of the light guide plate.

9. The backlight module of claim 8, wherein, The third protrusion is located on the side of the light guide plate away from the first protrusion and close to the side plates at opposite ends along the first direction; a light shield is provided on the side of the light guide plate facing the optical film layer, and the light shield is located on the side close to the third protrusion and at a first distance from the third protrusion; The contour of the side of the light-shielding plate away from the first boss is adapted to the contour of the first lug.

10. The backlight module of claim 8, wherein, The side plate includes at least a first side, a second side, a third side, and a fourth side, wherein the side where the light guide plate is bonded to the side plate, the second boss, the third boss, the fourth boss, and the fixing tape are all disposed on the side facing the fourth side.

11. A display panel, characterized by, Includes the backlight module as described in any one of claims 1-10.

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