Backlight module and display device of compressible light guide plate

Abstract

The present application relates to a backlight module of a pressable light guide plate and a display device. The backlight module of the pressable light guide plate and the display device comprising the backlight module are provided with an elastic action part at the light source installation part of the outer frame. One end of the light source and the light guide plate with the light entrance surface is installed in the light source installation part of the outer frame. A pressing part is arranged between the light source installation part and the light guide plate. The pressing part is pressed by the elastic force of the elastic action part to position the light guide plate in the outer frame. Meanwhile, the light entrance surface of the light guide plate is maintained at a position close to the light source. The gap between the light source and the light entrance surface of the light guide plate is increased due to thermal expansion and contraction of the light guide plate of the existing backlight module, which is not conducive to the light emitting performance of the light directly entering the light guide plate.

Description

Technical Field

[0001] This invention relates to a backlight module, particularly a backlight module suitable for providing a backlight to a display panel in a display device and capable of pressing a light guide plate. Background Technology

[0002] Currently, most display devices are liquid crystal displays (LCDs). Generally speaking, the LCD panels of LCDs do not have self-emissive properties and require a backlight module to provide a backlight source. As display devices are trending towards thinner designs, most existing backlight modules adopt a side-incident lighting configuration. This means that the light source in the backlight module is projected from one side of the light guide plate, and the light is converted into a surface light source emitted from the light guide plate's emitting surface by utilizing the light guide plate's total internal reflection characteristic. Alternatively, optical films are used to homogenize or brighten the surface light source, providing a backlight for the LCD panel on the backlight module to display the image.

[0003] In the aforementioned conventional display device backlight module, due to the different materials of the light guide plate and the outer frame, the coefficient of thermal expansion of the light guide plate is greater than that of the outer frame. When the light guide plate expands and contracts due to heat, the expansion and contraction of the light guide plate are both greater than those of the outer frame. Since the light guide plate is usually attached to the outer frame with double-sided tape, it easily blocks the light-emitting area of ​​the light source, causing optical loss and poor gloss. The tape material may also produce a light-concentrating effect, thereby affecting the uniformity and quality of the light-emitting surface. To reduce optical loss, the tape is usually designed in a bullet shape, but the manufacturing process of bullet-shaped tape is difficult and the yield is low, which can easily increase the overall manufacturing cost. Especially in applications where the number of light-emitting elements in the light source is large and the spacing is small, the tape width is limited, and the feasibility of special shape designs is even lower. If a full-surface adhesive is used, the optical loss problem will be even more serious. Moreover, the light guide plate is prone to increased gap between the light source and the light incident surface of the light guide plate due to thermal expansion and contraction. This is especially true when tape is used to fix the light on one side, making it easier for gaps to form on the other side, which is detrimental to the light-emitting performance of the light directly hitting the light guide plate. Summary of the Invention

[0004] The purpose of this invention is to provide a backlight module that can press a light guide plate and a display device including the backlight module, thereby improving the problem that the light guide plate in the existing backlight module is prone to thermal expansion and contraction, which causes the gap between the light source and the light incident surface of the light guide plate to increase, which is not conducive to the light emission performance of the light directly hitting the light guide plate.

[0005] To achieve the aforementioned objectives, the backlight module proposed in this invention includes: An outer frame has a light source mounting part on one side, and the light source mounting part has at least one elastic action part; A light source is disposed in the light source mounting part of the outer frame and has a light-emitting side; A light guide plate is disposed in the outer frame and has a light incident surface. One end of the light guide plate with the light incident surface faces the light source mounting portion, and the light incident surface faces the light emitting side of the light source; and A pressing member is installed between the light source mounting part and the light guide plate, and interferes with the light guide plate. The pressing member is able to press the light guide plate into position in the outer frame by the elastic force of the elastic part.

[0006] To achieve the aforementioned objectives, the present invention also provides a display device comprising: A backlight module as described above; and A display panel is mounted on the backlight module.

[0007] The aforementioned backlight module design achieves at least the following technical benefits: 1. The light-incident surface of the light guide plate is kept close to the light source: The backlight module has an elastic part in the light source mounting part of its outer frame. The light source and the end of the light guide plate with the light-incident surface are located in the light source mounting part of the outer frame. A pressing member is provided between the light source mounting part and the light guide plate. The pressing member can press and fix the light guide plate in the outer frame by the elastic force of the elastic part. When the light guide plate expands and contracts with heat, the light-incident surface of the light guide plate can be kept close to the light source. This improves the existing backlight module's light guide plate, which has an increased gap between the light source and the light-incident surface of the light guide plate due to thermal expansion and contraction, which is not conducive to the light-emitting performance of the light directly hitting the light guide plate.

[0008] 2. Improved assembly convenience and reduced assembly time: As mentioned above, this backlight module utilizes the light source and the light guide plate, with one end having the light incident surface, located inside the light source mounting part of the outer frame. A pressing member is provided between the light source mounting part and the light guide plate. The pressing member, under the elastic force of the elastic part, can press the light guide plate and position it in the outer frame. This assembly structure allows for easy and quick assembly and positioning of the light guide plate and light source in the outer frame, reducing the need to use double-sided tape to stick and fix the light guide plate and light source in the outer frame, thus improving assembly convenience and reducing assembly time. Attached Figure Description

[0009] Figure 1 This is a plan view of an embodiment of the backlight module of the present invention, which can press a light guide plate.

[0010] Figure 2 yes Figure 1 A partial three-dimensional schematic diagram of the pressing component in the backlight module embodiment shown.

[0011] Figure 3 yes Figure 1 The diagram shows the usage state of the backlight module embodiment under thermal expansion.

[0012] Figure 4 yes Figure 1 The diagram shows the usage status of the backlight module embodiment in a cold-shrink state.

[0013] Figure 5 yes Figure 1 The diagram shows the usage state of the backlight module embodiment, where the pressing member is pushed out when it expands toward the light source due to heat.

[0014] Figure 6 This is a plan view of another embodiment of the backlight module of the present invention, which can press a light guide plate and add an optical film.

[0015] Figure 7 This is a plan view of an embodiment of the display device of the present invention. Detailed Implementation

[0016] like Figure 1 The diagram illustrates an embodiment of a backlight module with a pressable light guide plate according to the present invention. The backlight module includes: an outer frame 10, a light source 20, a light guide plate 30, and a pressing member 40. The outer frame 10 has a light source mounting portion 11 on one side, and the light source mounting portion 11 has at least one elastic actuating portion 110. The light source 20 is disposed in the light source mounting portion 11 of the outer frame 10 and has a light-emitting side 200. The light guide plate 30 is disposed in the outer frame 10 and has a light-incident surface 31. One end of the light guide plate 30 with the light-incident surface 31 is disposed within the light source mounting portion 11, and the light-incident surface 31 faces the light-emitting side 200 of the light source 20. The pressing member 40 is installed between the light source mounting portion 11 and the light guide plate 30, and is pressed against the light source mounting portion 11. The light guide plates 30 interfere with each other. The pressing member 40 is pressed by the elastic force of the elastic part 110 and positioned in the outer frame 10. The light-incident surface 31 of the light guide plate 30 is kept close to the light-emitting side 200 of the light source 20. This ensures that the light emitted by the light source 20 can be directly projected onto the light-incident surface 31 of the light guide plate 30. This avoids the problem in conventional backlight modules where the light guide plate 30 is prone to thermal expansion and contraction, which can cause the gap between the light source 20 and the light-incident surface 31 of the light guide plate 30 to increase, making it difficult for light to directly hit the light-incident surface 31 of the light guide plate 30. On the other hand, by means of the elastic force of the elastic part 110, the pressing member 40 presses and fixes the light guide plate 30, making it easy to assemble and position the light guide plate 30 in the light source mounting part 11 of the outer frame 10. At the same time, it can also improve the stability of the connection between the light guide plate 30 and the outer frame 10, and reduce the manufacturing process and operation time of attaching the light guide plate 30 of the conventional backlight module to the outer frame 10 with double-sided tape.

[0017] like Figure 1As shown, the number of elastic action parts 110 is set according to the actual backlight module product requirements. In this embodiment, the outer frame 10 also includes a back plate portion 12, and the light source mounting portion 11 is disposed on one side of the back plate portion 12. The light source mounting portion 11 includes a side portion 111 and an upper plate portion 112 extending from the side portion 111 along the back plate portion 12. The elastic action parts 110 are disposed on the side of the upper plate portion 112 away from the side portion 111 and inclined towards the back plate portion 12.

[0018] like Figure 1 As shown, the light source 20 includes a circuit board 21 and a plurality of light-emitting elements 22 disposed on the circuit board 21. The circuit board 21 of the light source 20 is disposed on the back plate of the outer frame 10. It is worth noting that the light source 20 can be, for example, an incandescent lamp, an energy-saving lamp, a metal halide lamp, or a light-emitting diode (LED), but is not limited thereto. The light source exemplified in this invention is a light-emitting diode (LED). The circuit board 21 can be a rigid circuit board or a flexible circuit board. Preferably, the circuit board 21 is a flexible printed circuit (FPC), which is beneficial for reducing the weight and thickness of the backlight module. The light-emitting elements 22 are LEDs, which give them low power consumption and long service life.

[0019] like Figure 1 As shown, the light-emitting element 22 of the light source 20 is close to the light-incident surface 31 of the light guide plate 30 and can directly project light toward the light-incident surface 31.

[0020] like Figure 1 As shown, in this embodiment, the upper and lower opposite sides of the light guide plate 30 are a light emitting surface 32 and a back surface 33, respectively. The light receiving surface 31 connects the light emitting surface 32 and the back surface 33. The back surface 33 of the light guide plate 30 is located on the back plate portion 12 of the outer frame 10 and abuts against the circuit board 21 of the light source 20.

[0021] like Figure 1 As shown, a reflective film 51 can be added between the back surface 33 of the light guide plate 30 and the back plate portion 12 of the outer frame 10, so as to assist the back surface 33 of the light guide plate 30 in reflecting light.

[0022] like Figure 1 and Figure 2As shown, in this embodiment, the pressing member 40 has a base 41, and the end of the base 41 facing the light source 20 has a guide surface 412. The guide surface 412 is connected to the abutting inclined surface 411, and the guide surface 412 and the abutting inclined surface 411 have different directions. The connecting edge of the guide surface 412 and the abutting inclined surface 411 is located at a higher position on the top of the base 41. Preferably, the inclination directions of the guide surface 412 and the abutting inclined surface 411 are opposite to each other. With the assistance of the inclined guide surface 412, the base 41 of the pressing member 40 can easily complete the assembly operation by passing through the gap between the inclined elastic part 110 of the light guide plate 30 and the light guide plate 30. It is worth noting that the number of pressing members 40 is not limited to one. The number of pressing members 40 should correspond to the number of elastic action parts 110, but is not limited thereto. For example, multiple elastic action parts 110 may correspond to one pressing member 40 or one elastic action part 110 may correspond to multiple pressing members 40, which are all extensions of the present invention.

[0023] like Figure 1 and Figure 2 As shown, in this embodiment, the pressing member 40 may further be provided with a non-smooth contact surface 43 that interferes with the light guide plate 30. This increases the frictional resistance between the pressing member 40 and the light-emitting surface 32 of the light guide plate 30. It is worth noting that the contact surface 43 of the pressing member 40 mainly produces a rough surface, which can generate friction when combined with the light guide plate 30, so that the light guide plate 30 and the pressing member 40 can be simultaneously placed into the outer frame 10 during assembly. Furthermore, when the light guide plate 30 expands and contracts due to heat, the elastic force part 110 clamps the light guide plate 30 and the pressing member 40, allowing them to move synchronously and preventing misalignment. Moreover, this design does not necessarily have to be a serrated strip; any structural surface is sufficient. In addition, it is worth noting that the surface of the light guide plate 30 where the pressing member 40 is located can also have a rough surface, which can increase the friction with the pressing member 40, also for the purpose of allowing the light guide plate 30 and the pressing member 40 to move synchronously.

[0024] like Figure 1As shown, in order to maintain the light-incident surface 31 of the light guide plate 30 at a position close to the light-emitting side 200 of the light source 20, the elastic part 110 must apply an appropriate force to the pressing member 40, and then the light guide plate 30 is firmly fixed in the outer frame 10 by the pressing member 40. As described above, the elastic part 110 of the outer frame 10 is located on the side of the upper plate portion 112 away from the side portion 111 and inclined towards the back plate portion 12; that is, the elastic part 110 extends inclinedly towards the pressing member 40 in a direction opposite to the light-emitting element 22 of the light source 20. The pressing member 40 has an abutting inclined surface 411, which matches the inclination direction of the elastic part 110. In this way, the elastic force part 110 can not only press against the abutting inclined surface 411 of the pressing member 40, so that the pressing member 40 can press the light guide plate 30 downward and position it in the outer frame 10 by the elastic force of the elastic force part 110, but also generate a force to push the light guide plate 30 toward the light-emitting element 22 of the light source 20, so that the light-incident surface 31 of the light guide plate 30 is maintained at a position close to the light-emitting side 200 of the light source 20.

[0025] like Figure 1 As shown, under normal conditions, the elastic part 110 of the outer frame 10 is inclined downward relative to the top surface of the upper plate 112 and has an inclination angle. .like Figure 3 As shown, under heated conditions, compared to the light guide plate 30 and the pressing member 40 (the imaginary lines in the figure) under normal temperature conditions, both the light guide plate 30A and the pressing member 40A increase in volume due to heat. At this time, the elastic part 110 in the outer frame 10 that presses down on the pressing member 40A is slightly deflected upward due to being pushed, and the elastic part 110 has a first tilt angle relative to the top surface of the upper plate 112. 1. The first tilt angle 1 is less than this tilt angle .like Figure 4 As shown, in the cooled state, compared to the light guide plate 30 and the pressing member 40 (the imaginary lines in the figure), both the light guide plate 30B and the pressing member 40B become smaller due to cooling. At this time, the elastic part 110 that presses the pressing member 40B in the outer frame 10 is slightly deflected downward due to being pushed, and the elastic part 110 has a second tilt angle relative to the top surface of the upper plate 112. 2, the second tilt angle 2 is greater than this tilt angle It is worth noting the tilt angle of the elastic action part 110. Matching the tilt direction of the abutting inclined surface 411, the tilt angle The volume of part 40 changes slightly with temperature fluctuations. When part 40 is heated, its volume expands due to thermal expansion, causing it to tilt at an angle. Slightly smaller, when the pressing part 40 cools or decreases in temperature, the tilt angle... Slightly larger.

[0026] like Figure 1 and Figure 3 , Figure 4 As shown, the elastic force part 110 extends obliquely towards the light-emitting element 22 opposite to the light source 20 and towards the pressing member 40, and the pressing member 40 has an abutting slope 411 that matches the oblique direction of the elastic force part 110. Therefore, the elastic force part 110 can not only press against the abutting slope 411 of the pressing member 40, causing the pressing member 40 to be subjected to the elastic force of the elastic force part 110, but also push the light guide plate 30 downwards for positioning, thereby also generating a pushing force against the light guide plate 30. The force of the light plate 30 toward the light-emitting element 22 of the light source 20 ensures that the light-incident surface 31 of the light guide plate 30 is maintained close to the light-emitting side 200 of the light source 20. This ensures that the light emitted by the light source 20 can be directly projected onto the light-incident surface 31 of the light guide plate 30, avoiding the problem in conventional backlight modules where the light guide plate 30 is prone to thermal expansion and contraction, which can cause the gap between the light-emitting element 22 of the light source 20 and the light-incident surface 31 of the light guide plate 30 to increase, making it difficult for light to directly hit the light-incident surface 31 of the light guide plate 30.

[0027] In this embodiment, the light guide plate 30 and the pressing member 40 undergo consistent thermal expansion and contraction regardless of whether they are heated or cooled. That is, the light guide plate 30 and the pressing member 40 are made of the same material and have the same coefficient of thermal expansion, therefore their expansion amounts are the same. The outer frame 10 has a smaller coefficient of thermal expansion, so its expansion amount is negligible. This material combination ensures that the light guide plate 30 and the pressing member 40 expand or contract synchronously, avoiding relative displacement. Simultaneously, it ensures that the relative displacement caused by thermal expansion and contraction mainly occurs between the elastic part 110 and the pressing member 40.

[0028] Next, we will further explain the situation of contraction due to cooling. When the light guide plate 30 contracts due to cooling, its thickness decreases, and the pressing member 40 is displaced downwards, increasing the gap between the pressing member 40 and the elastic action part 110. At this time, since the pressing member 40 also contracts from the outside to the inside due to cooling, ... Figure 4 It appears to shrink to the right. At this time, the pressing member 40 can slide to the right along the slope of the elastic part 110 until the elastic part 110 presses down on the position where the thickness of the pressing member 40 is larger (that is, the higher position of the slope of the pressing member 40), so as to meet the gap between the increased pressing member 40 and the elastic part 110.

[0029] In addition, such as Figure 1 As shown, the pressing member 40 can also provide a shielding effect on the light-emitting surface 32 of the light guide plate 30 adjacent to the light-incident surface 31, reducing light leakage from the light source 20 through the gap between the light source mounting portion 11 of the outer frame 10 and the light-emitting surface 32 of the light guide plate 30. Preferably, the pressing member 40 can be further made of a material with light reflectivity or a material with light reflectivity can be attached to the surface facing the light guide plate 30. In this way, by means of the design features of light reflectivity, the light projected onto the pressing member 40 is reflected back into the light guide plate 30, thereby improving the light energy utilization rate.

[0030] like Figure 1 and Figure 5 As shown, the pressing member 40 may further have a limiting portion 42, which is located at the end of the base 41 that extends beyond the light source mounting portion 11 and protrudes in the direction opposite to the light guide plate 30. When the light guide plate 30 is heated and expands, it will push the pressing member 40 upward and reduce the gap between the pressing member 40 and the elastic action portion 110. At this time, since the pressing member 40 is also heated in the same way and expands from the inside to the outside, Figure 5 The expansion is directed to the left. At this point, the pressing member 40 can slide to the left along the inclined surface of the elastic part 110 until the elastic part 110 presses down on the pressing member 40 at a position where its thickness is smaller (i.e., the lower position of the inclined surface of the pressing member 40), thus matching the gap between the reduced pressing member 40 and the elastic part 110. In this way, the pressing member 40 not only presses the light guide plate 30 downwards to position it within the outer frame 10, but also generates friction on the contact surface 43 to push the light guide plate 30 towards the light-emitting element 22 of the light source 20, or even more preferably, until the limiting part 42 can contact the elastic part 110. Thus, by using the limiting portion 42 of the pressing member 40 to limit the outer side of the elastic action portion 110, the pressing member 40 is prevented from excessively entering between the elastic action portion 110 and the light guide plate 30, ensuring that the elastic action portion 110 can press the light guide plate 30 for positioning via the pressing member 40.

[0031] like Figure 5As shown, in this embodiment, the elastic part 110 of the outer frame 10 and the upper plate 112 have a connection 113. The elastic part 110 overlaps the abutting inclined surface 411 of the pressing member 40C in the projection direction. Therefore, when the pressing member 40C is heated and expands towards the light source 20 (the imaginary line in the figure represents the pressing member 40 at room temperature), the pressing member 40C can be pressed downwards by the elastic force of the elastic part 110. The light guide plate 30C is positioned within the outer frame 10, and simultaneously generates a force that pushes the light guide plate 30C toward the light-emitting element 22 of the light source 20 until the highest point 413 of the abutment slope 411 contacts the connection 113 of the elastic part 110. This causes the entire elastic part 110 to completely press against the abutment slope 411 of the pressing member 40C, ensuring that the elastic part 110 can press and position the light guide plate 30C via the pressing member 40C. It is worth noting that after the limiting part 42 contacts the elastic part 110, it can prevent the light guide plate 30C from continuing to expand thermally toward the light-emitting element 22, effectively preventing the light guide plate 30C from shifting due to temperature changes and causing optical loss.

[0032] like Figure 6 As shown, in the backlight module embodiment of the pressable light guide plate of the present invention, at least one optical film 50 may be added. The optical film 50 is disposed on the light-emitting surface 32 of the light guide plate 30. When there are multiple optical films 50, the multiple optical films 50 are stacked sequentially on the light-emitting surface 32. The optical films 50 are selected according to the functional requirements of the backlight module, such as diffuser sheets with light diffusion properties, brightening sheets with brightness enhancement properties, or prism sheets with light guiding properties, etc., which have specific optical properties. When the light emitted by the light source 20 is guided by the light guide plate 30 and emitted from the light-emitting surface 32, it is then diffused and brightened by the optical films 50, thereby improving the brightness and uniformity of the backlight module.

[0033] like Figure 7 The diagram illustrates an embodiment of the display device of the present invention. The display device includes a backlight module and a display panel 60. The specific composition and structure of the backlight module have been described previously and will not be repeated here. The display panel 60 is a liquid crystal panel, and it is mounted on the backlight module. When the backlight module has at least one optical film 50 on the light-emitting surface 32 of the light guide plate 30, the display panel 60 is disposed on the optical film 50. Thus, the backlight module provides the backlight source required for displaying the image on the display panel 60.

[0034] In summary, the backlight module with a pressable light guide plate and the display device including the backlight module of the present invention utilize the light source mounting part 11 of the outer frame 10 to provide an elastic action part 110. The light source 20 and the light guide plate 30 are located inside the light source mounting part 11 of the outer frame 10 with one end having a light incident surface 31. A pressing member 40 is provided between the light source mounting part 11 and the light guide plate 30. The pressing member 40 is pressed and positioned in the outer frame 10 by the elastic force of the elastic action part 110. In this way, when the light guide plate 30 expands and contracts with heat, the light incident surface 31 of the light guide plate 30 can be maintained in a position close to the light source 20. This improves the problem in the existing backlight module where the gap between the light source 20 and the light incident surface 31 of the light guide plate 30 increases or decreases due to thermal expansion and contraction, which is not conducive to the light emission performance of the light directly hitting the light guide plate 30. On the other hand, the assembly can be completed simply by inserting the pressing part 40 into the elastic part 110 of the outer frame 10. This allows the backlight module to easily and quickly complete the assembly and positioning of the light guide plate 30 and the light source 20 within the outer frame 10, improving assembly convenience and reducing assembly time. In addition, the pressing part 40 can be molded using a mold, and its shape is more unique than that of conventional films or die-cut tapes, enabling diverse designs for light-emitting shapes.

[0035] To address the problems of conventional techniques where adhesive tape can obstruct the light-emitting area, causing optical loss and poor luminous surface quality, and considering the low yield, high cost, and complex assembly requirements of tape production, this invention addresses these issues. Furthermore, the light guide plate, once fixed in place, is susceptible to thermal expansion and contraction due to the light source's heat, leading to gaps between the light guide plate and the light source, resulting in reduced light utilization and potential light leakage. This invention utilizes the thermal expansion and contraction properties of the pressing component, combined with a specially designed shape to press the light guide plate, ensuring its stability even under temperature variations. This effectively solves the gap problem caused by temperature changes, ensuring stable optical performance and completely replacing adhesive tape application, saving on tape manufacturing and application costs while increasing optical efficiency. Since the expansion coefficient of the pressing component is the same as that of the light guide plate, but slightly different from that of the outer frame, the pressing component can expand and contract synchronously with the light guide plate during thermal expansion and contraction. Through the combination of the abutting slope of the outer frame and the limiting part of the pressing component, the displacement of the light guide plate caused by temperature changes can be effectively prevented. There is also no optical loss caused by the application of adhesive tape. At the same time, it improves assembly efficiency, reduces assembly difficulty, and eliminates the cost of producing adhesive tape and the time spent on application.

[0036] While the present invention has been disclosed above through embodiments, it is not intended to limit the invention. Any person skilled in the art will be able to make modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

[0037] [Symbol Explanation] 10: Outer frame 11: Light Source Installation Department 110: Elastic Action Part 111: Side 112: Upper plate part 113: Connection 12: Back panel 20: Light source 200: Light-emitting side 21: Circuit board 22: Light-emitting element 30: Light guide plate 30A: Light guide plate 30B: Light guide plate 30C: Light guide plate 31: Light-receiving surface 32: Light-emitting surface 33: Back 40: Pressing parts 40A: Press-fit component 40B: Pressing part 40C: Press-fit part 41: Base 411: Contact slope 412: Guiding surface 413:Highest point 42: Limiting part 43: Adhesive Surface 50: Optical film 51: Reflective film 60: Display panel Tilt angle 1: First tilt angle 2: Second tilt angle.

Claims

1. A backlight module capable of pressing a light guide plate, comprising: The outer frame has a light source mounting part on one side, and the light source mounting part has at least one elastic action part; A light source is disposed in the light source mounting part of the outer frame and has a light-emitting side; A light guide plate is disposed in the outer frame and has a light incident surface. The side end of the light guide plate with the light incident surface is disposed in the light source mounting part, and the light incident surface faces the light emitting side of the light source. as well as A pressing member is installed between the light source mounting part and the light guide plate, and interferes with the light guide plate. The pressing member is able to press the light guide plate into position in the outer frame by the elastic force of the elastic part.

2. The backlight module with a pressable light guide plate as described in claim 1, wherein, The elastic force-acting part extends at an angle opposite to the light source and biased toward the pressing member; The pressing member has an abutting slope that matches the tilt direction of the elastic force part, and the elastic force part is pressed against the abutting slope.

3. The backlight module with a pressable light guide plate as described in claim 2, wherein, The pressing member has a base, and the end of the base facing the light source has a guide surface. The guide surface is connected to the abutting slope, and the guide surface and the abutting slope have different directions.

4. The backlight module with a pressable light guide plate as described in claim 3, wherein, The pressing member has a limiting part that protrudes in the opposite direction to the light guide plate at one end of the base extending out of the light source mounting part. The limiting part is located outside the elastic action part. When the pressing member is heated and expands in the direction of the light source, the limiting part can come into contact with the elastic action part.

5. The backlight module with a pressable light guide plate as described in claim 1, wherein, The pressing component has a non-smooth bonding surface that interferes with the light guide plate.

6. The backlight module with a pressable light guide plate as described in claim 1, wherein, The outer frame also includes a back panel, and the light source mounting part is located on one side of the back panel. The light source mounting part includes a side portion and an upper plate portion extending from the side portion along the back panel. The elastic action part is located on the side of the upper plate portion away from the side portion and is inclined toward the back panel.

7. The backlight module with a pressable light guide plate as described in claim 6, wherein, The pressing member has an abutting slope that matches the tilt direction of the elastic force part. The elastic force part and the upper plate have a connection. The elastic force part overlaps the abutting slope of the pressing member in the projection direction. The pressing member expands towards the light source when heated until the highest point of the abutting slope contacts the connection of the elastic force part.

8. The backlight module with a pressable light guide plate as described in claim 6, wherein, The light source includes a circuit board and a plurality of light-emitting elements disposed on the circuit board, wherein the light-emitting elements are capable of projecting light toward the light-incident surface; The upper and lower opposite sides of the light guide plate are the light emitting surface and the back surface, respectively. The light receiving surface connects the light emitting surface and the back surface. The back surface of the light guide plate is located on the back plate and abuts against the circuit board. The pressing member interferes with the light emitting surface.

9. The backlight module with a pressable light guide plate as described in claim 1, wherein, The pressing component is made of a material with light reflectivity.

10. A display device comprising: A backlight module with a pressable light guide plate as described in any one of claims 1 to 9; as well as The display panel is located on the backlight module.

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