Backlight module for double-sided screen and display terminal

Abstract

The invention discloses a backlight module for a double-sided screen and a display terminal. The backlight module comprises a reflecting plate, a light guide layer arranged in the reflecting plate and a light source arranged in the reflecting plate and located on one side of the light guide layer. The flat plate part is attached to the light guide layer, the bending part is bent to be in a C shape and surrounds the outer side of the light source, the coarse grain part is connected between the flat plate part and the bending part in a transition mode, and the end, close to the light source, of the light guide layer is tightly attached to the coarse grain part. By arranging the reflecting plate of the three-section structure, the flat plate part can normally achieve the reflecting function, the bent part can assist a light source to be output to the light guide layer in a concentrated mode, and by arranging the coarse grain part, on one hand, under the condition that the light guide layer is attached, the distance between one end of the light guide layer and the light source is limited, and the light source cannot be affected under the condition that the light guide layer is heated and expanded; and on the other hand, the reflecting effect of the part of reflecting plate can be weakened, so that the phenomenon of bright edges on the display screen is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of flat panel displays, and in particular to a backlight module for a double-sided screen and a display terminal. Background Art

[0002] Liquid crystal display terminals have many advantages such as thin body, power saving, and no radiation, and have been widely used, such as mobile phones, digital cameras, computer screens or laptop screens, etc. Most of the liquid crystal display devices on the current market are backlight type liquid crystal display devices, which include a housing, a liquid crystal panel arranged in the housing, and a backlight module arranged in the housing. Since the liquid crystal panel itself does not emit light, it needs to rely on the light source provided by the backlight module to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device. The existing backlight module can basically meet the use requirements of the display terminal, but there are still some shortcomings that need to be improved.

[0003] Patent document CN103672620A disclosed a backlight module on March 26, 2014, and its technical solution includes: a back plate, a light guide plate arranged in the back plate, a backlight source arranged in the back plate and located on one side of the light guide plate, a light shield arranged between the backlight source and the back plate, and a side reflector arranged between the light guide plate and the backlight source, wherein the backlight source includes an LED substrate and a plurality of LED lamps mounted on the LED substrate, wherein the side reflector is elastic, and the side reflector is provided with a plurality of openings corresponding to the LED lamps, wherein the LED lamps are accommodated in the openings to provide a light source for the light guide plate. Its beneficial effect is that by providing the side reflector with elasticity, the deformation of the light guide plate caused by heat is effectively buffered, and the problem of the light guide plate breaking caused by the deformation of the light guide plate due to heat expansion is avoided, and at the same time, the metal light shield is provided, while effectively avoiding the light emitted by the backlight source from leaking from the edge of the light guide plate, the heat dissipation effect of the backlight module is enhanced, and the quality of the backlight module is improved.

[0004] As in the prior art of the above-mentioned patent, the light source is arranged on one side of the light guide layer, and the light source is focused by the reflective structure to irradiate the light guide layer. As a result, on the one hand, the light guide layer is prone to heat and deformation, which may cause the light source to be squeezed, and on the other hand, the end of the light guide layer close to the light source receives light sources from more directions, and the light reflections generated thereby are more and denser, which may easily cause the bright edge phenomenon at the edge of the display screen. Therefore, there is an urgent need for a backlight module and a display terminal for a double-sided screen to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a backlight module and a display terminal for a double-sided screen to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A backlight module for a double-sided screen comprises a reflective plate, a light-guiding layer arranged in the reflective plate, and a light source arranged in the reflective plate and located on one side of the light-guiding layer. The reflective plate comprises a flat portion bonded to the light-guiding layer, a bent portion bent in a C shape and arranged around the outside of the light source, and a coarse-grooved portion transitionally connected between the flat portion and the bent portion. An end of the light-guiding layer close to the light source is tightly bonded to the coarse-grooved portion.

[0008] A display terminal includes the above-mentioned backlight module for double-sided screen, and also includes a main screen compartment and a sub-screen compartment, wherein the backlight module is arranged in the main screen compartment, a connecting seat is arranged on the back side of the main screen compartment, and the sub-screen compartment is hinged on the connecting seat.

[0009] Preferably, the main screen compartment and the auxiliary screen compartment are folded with their back sides close to each other and in parallel, and a first heat dissipation protrusion and a second heat dissipation protrusion are respectively provided on the back sides of the main screen compartment and the auxiliary screen compartment. When the main screen compartment and the auxiliary screen compartment are folded, the first heat dissipation protrusion and the second heat dissipation protrusion are abutted against each other to form a heat dissipation gap between the main screen compartment and the auxiliary screen compartment.

[0010] Preferably, a magnetic component is provided on one end of the back side of the main screen compartment away from the connecting seat, and when the main screen compartment and the auxiliary screen compartment are folded, the auxiliary screen compartment is adsorbed and fixed by the magnetic component.

[0011] Preferably, a heat dissipation port is provided on the side wall of the main screen compartment, and a shielding component for controlling the switch of the heat dissipation port is movably provided in the main screen compartment. The first heat dissipation protrusion is movably provided on the main screen compartment and linked with the shielding component. When the main screen compartment and the auxiliary screen compartment are folded, the first heat dissipation protrusion and the second heat dissipation protrusion are staggered and wedge-shaped extrusion-matched, and the auxiliary screen compartment can be movably provided in parallel with the main screen compartment.

[0012] Preferably, an axle seat is provided at one end of the auxiliary screen compartment close to the connecting seat, and shaft heads are provided at both ends of the axle seat. A sliding seat is elastically and movably provided in the connecting seat, and the shaft head is rotatably connected to the sliding seat.

[0013] Preferably, a connecting rod connecting the two sliding seats is arranged in the connecting seat, an elastic member is arranged between the connecting rod and the inner wall of the connecting seat, a window is arranged on the connecting seat, and the middle part of the connecting rod extends out of the window.

[0014] Preferably, a heat sink connected to each first heat dissipation protrusion is provided in the main screen compartment, and the heat sink is connected to the reflective plate in the main screen compartment through an elastic heat sink.

[0015] Preferably, the shielding assembly comprises a shielding member fixedly connected to the side of the heat dissipation plate, and the shielding member is provided with a through opening matching the heat dissipation port.

[0016] Preferably, a through hole matching the first heat dissipation protrusion is provided on the back side of the main screen compartment.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The backlight module for the double-sided screen is provided with a reflective plate with a three-section structure. The flat portion can realize the reflective function normally, the bent portion can assist the light source to output to the light guide layer in a concentrated manner, and the rough-grooved portion, on the one hand, limits the distance between one end of the light guide layer and the light source under the condition of being fitted to the light guide layer, and will not affect the light source when the light guide layer heats up and expands. On the other hand, it can weaken the reflective effect of this part of the reflective plate, so that the light reflection generated by the end of the light guide layer close to the light source is weakened, thereby avoiding the edge bright edge phenomenon on the display screen.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the basic components of a backlight module provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a front cross-sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 The embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 6 A schematic diagram of a partial structure of a reflector provided in an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention;

[0029] Figure 8The embodiment of the present invention provides Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0030] Fig. 9 A schematic diagram of a top-down cross-sectional structure provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Reflection plate; 101. Flat plate portion; 102. Bending portion; 103. Coarse-grained portion; 2. Light-guiding layer; 3. Light source; 4. Main screen compartment; 5. Sub-screen compartment; 6. Connecting seat; 7. First heat dissipation protrusion; 8. Second heat dissipation protrusion; 9. Magnetic element; 10. Heat dissipation port; 11. Shaft seat; 12. Shaft head; 13. Sliding seat; 14. Connecting rod; 15. Elastic element; 16. Window; 17. Heat dissipation plate; 18. Elastic heat sink; 19. Shielding element; 20. Through port; 21. Through hole. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0034] See also Figure 1-9 A backlight module for a double-sided screen provided in an embodiment of the present invention comprises a reflector 1, a light guide layer 2 arranged in the reflector 1, and a light source 3 arranged in the reflector 1 and located on one side of the light guide layer 2. The reflector 1 comprises a flat portion 101 bonded to the light guide layer 2, a bent portion 102 bent in a C shape and arranged around the outside of the light source 3, and a coarse-grained portion 103 transitionally connected between the flat portion 101 and the bent portion 102. One end of the light guide layer 2 close to the light source 3 is tightly bonded to the coarse-grained portion 103.

[0035] Specifically, the backlight module includes, in addition to the reflective plate 1, the light guide layer 2 and the light source 3, a light shield 22, a lower diffusion film 23, a lower brightness enhancement film 24, an upper brightness enhancement film 25 and an upper diffusion film 26, and is specifically configured as follows: the reflective plate 1 is at the bottom layer, and then the light guide layer 2, the lower diffusion film 23, the lower brightness enhancement film 24, the upper brightness enhancement film 25 and the upper diffusion film 26 are stacked and bonded upward in sequence, the light source 3 is arranged on one side of the corresponding light guide layer 2, and the other side of the light source 3 is surrounded by the light shield 22; wherein, the inner side of the reflective plate 1 is coated with a reflective material; the commonly used base material of the light guide layer 2 is acrylic (PMMA), which is an optical material with extremely high reflectivity. The light source 3 is preferably an LED light strip; the lower diffusion film 23 and the upper diffusion film 26 are preferably made of PET. When the light passes through the diffusion layer with PET as the substrate, it will pass through the carrier with different refractive indices, causing a lot of refraction, reflection and scattering of the light, thereby changing the light to meet the optical dispersion effect; the lower brightening film 24 and the upper brightening film 25, also known as prism or brightness enhancement film (BEF), use the refraction and reflection of the prism to correct the light, gather the scattered light from the light source on the front, and improve the overall brightness. The preferred material of the brightening film can be a PET substrate or a polycarbonate substrate. The inner side of the reflective plate 1 is coated with reflective material to make the light irradiated thereon be concentrated and reflected to one side; the light guide layer 2 is used to transmit the light emitted by the light source 3 and form planar light; the light source 3 is preferably a columnar lamp, and the length matches the length of the side of the light guide layer 2 close to it; the flat portion 101 is the main body of the reflective plate 1, and the side close to the light guide layer 2 is coated with reflective material; the inner side of the bending portion 102 surrounding the light source 3 is coated with reflective material, which is equivalent to a light shield, and the end of the light guide layer 2 close to the light source 3 just fills and blocks the opening side of the bending portion 102, thereby making the light emitted by the light source 3 be concentrated to the light guide layer 2; the surface of the coarse-grained portion 103 close to the light guide layer 2 is roughened and not coated with reflective material, and the light guide layer 2 is tightly attached to the coarse-grained portion 103 so as to be resisted and cannot approach the light source 3. In actual use of the present technical solution, a three-section structured reflector 1 is provided, wherein the flat portion 101 can realize the reflective function normally, the bent portion 102 can assist the light source 3 in outputting to the light guide layer 2 in a concentrated manner, and the rough-grooved portion 103 is provided, on the one hand, to limit the distance between one end of the light guide layer 2 and the light source 3 under the condition of being fitted to the light guide layer 2, and will not affect the light source 3 when the light guide layer 2 heats up and expands, and on the other hand, can weaken the reflective effect of this part of the reflector 1, so that the light reflection generated at the end of the light guide layer 2 close to the light source 3 is weakened, thereby avoiding the edge bright edge phenomenon on the display screen.

[0036] Compared with the prior art, a backlight module for a double-sided screen proposed in an embodiment of the present invention has a reflective plate 1 with a three-section structure, wherein the flat portion 101 can realize the reflective function normally, the bent portion 102 can assist the light source 3 in outputting to the light guide layer 2 in a concentrated manner, and the rough-grooved portion 103 can, on the one hand, limit the distance between one end of the light guide layer 2 and the light source 3 under the condition of being bonded to the light guide layer 2, and will not affect the light source 3 when the light guide layer 2 heats up and expands, and on the other hand, can weaken the reflective effect of this part of the reflective plate 1, so that the light reflection generated at the end of the light guide layer 2 close to the light source 3 is weakened, thereby avoiding the bright edge phenomenon on the display screen.

[0037] Another embodiment of the present invention provides a display terminal, which includes the above-mentioned double-sided screen backlight module, and also includes a main screen compartment 4 and a sub-screen compartment 5. The main screen compartment 4 is provided with a backlight module, and a connecting seat 6 is provided on the back side of the main screen compartment 4. The sub-screen compartment 5 is hinged on the connecting seat 6. Specifically, the main screen compartment 4 and the sub-screen compartment 5 are both flat-plate-shaped; the connecting seat 6 is convexly arranged on one side of the back side of the main screen compartment 4, and the convex height is consistent with the thickness of the sub-screen compartment 5; the sub-screen compartment 5 is hinged on the inner side of the connecting seat 6, and it rotates during the stroke. It has a folded state parallel to the main screen compartment 4 and an unfolded state forming a V-shape with the main screen compartment 4, and the rotation range is preferably 45°~90°; the side where the main screen compartment 4 and the auxiliary screen compartment 5 are away from each other is set as the display side; when the main screen compartment 4 and the auxiliary screen compartment 5 are unfolded in a V-shape, double-sided display is achieved and can be used upright for two-way interaction; when the main screen compartment 4 and the auxiliary screen compartment 5 are folded, the main screen compartment 4 can be displayed on one side and used as a tablet, and the size of the auxiliary screen compartment 5 and the connecting seat 6 is consistent with the size of the main screen compartment 4.

[0038] As a preferred technical solution of this embodiment, the main screen compartment 4 and the auxiliary screen compartment 5 are folded with their back sides close to each other and parallel, and the back sides of the main screen compartment 4 and the auxiliary screen compartment 5 are respectively provided with a first heat dissipation protrusion 7 and a second heat dissipation protrusion 8. When the main screen compartment 4 and the auxiliary screen compartment 5 are folded, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 abut against each other to form a heat dissipation gap between the main screen compartment 4 and the auxiliary screen compartment 5. Specifically, the provision of the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 increases the back side heat dissipation area of ​​the main screen compartment 4 and the auxiliary screen compartment 5, respectively, thereby improving heat dissipation. When the screen compartment 4 and the auxiliary screen compartment 5 are folded, the main screen compartment 4 is displayed on one side and used as a tablet, while the back side is blocked by the auxiliary screen compartment 5, which affects the heat dissipation. The first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 can be offset at this time to promote the formation of a heat dissipation gap between the main screen compartment 4 and the auxiliary screen compartment 5, thereby helping the main screen compartment 4 to dissipate heat. In addition, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are in contact with each other to form a heat conduction path, so that the second heat dissipation protrusion 8 and the outer shell of the auxiliary screen compartment 5 also assist the main screen compartment 4 in dissipating heat, greatly increasing the heat dissipation area.

[0039] As a preferred technical solution of this embodiment, a magnetic component 9 is provided on the back side of the main screen compartment 4 away from the connecting seat 6. When the main screen compartment 4 and the auxiliary screen compartment 5 are folded, the auxiliary screen compartment 5 is adsorbed and fixed by the magnetic component 9. Specifically, the setting of the magnetic component 9 facilitates fixing the folded state of the main screen compartment 4 and the auxiliary screen compartment 5.

[0040] In another embodiment of the present invention, a heat dissipation port 10 is provided on the side wall of the main screen compartment 4, and a shielding component for controlling the switch of the heat dissipation port 10 is movably provided in the main screen compartment 4, and the first heat dissipation protrusion 7 is movably provided on the main screen compartment 4 and linked with the shielding component. When the main screen compartment 4 and the auxiliary screen compartment 5 are folded, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are staggered and wedge-shaped extrusion-matched, and the auxiliary screen compartment 5 can be movably provided in parallel with the main screen compartment 4. Specifically, the heat dissipation port 10 is provided on two opposite sides of the main screen compartment 4 that do not correspond to the connecting seat 6 and the magnetic suction member 9; the shielding component controls the heat dissipation port 10 to be opened, so that the main screen compartment 4 can actively dissipate heat, and the shielding component controls the heat dissipation port 10 to be closed, so as to avoid the intrusion of dust and impurities; the first heat dissipation protrusion 7 moves in the inner and outer directions of the main screen compartment 4; the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are equidistantly provided on the main screen compartment 4 and the auxiliary screen compartment 5, respectively. When the main screen compartment 4 and the auxiliary screen compartment 5 are folded, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are equidistantly provided. The thermal protrusions 8 are parallel to each other and arranged in staggered positions, and the protruding height is less than the width of the heat dissipation gap formed between the main screen compartment 4 and the auxiliary screen compartment 5. In addition, the sides of the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 abut against each other and form a wedge-shaped fit; the auxiliary screen compartment 5 moves parallel to the main screen compartment 4, and its moving direction is set to be close to or away from the connecting seat 6; when the auxiliary screen compartment 5 moves parallel to and away from the connecting seat 6, that is, the end of the auxiliary screen compartment 5 away from the connecting seat 6 moves and protrudes to the same side of the main screen compartment 4, then the auxiliary screen compartment 5 drives the second heat dissipation protrusion 8 to move relative to the first heat dissipation protrusion 7 to achieve wedge-shaped extrusion, compressing the first heat dissipation protrusion 7, so that the first heat dissipation protrusion 7 moves into the main screen compartment 4, and then the shielding component is linked to open the heat dissipation port 10; when the auxiliary screen compartment 5 moves parallel to and closes the connecting seat 6 again, that is, the end of the auxiliary screen compartment 5 away from the connecting seat 6 moves and is collected on the same side of the main screen compartment 4, then the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 return to their initial positions, and the shielding component is linked to close the heat dissipation port 10.

[0041] As the preferred technical solution of this embodiment, an axle seat 11 is provided at one end of the auxiliary screen warehouse 5 close to the connecting seat 6, and shaft heads 12 are provided at both ends of the axle seat 11. A slide seat 13 is elastically and movably provided in the connecting seat 6, and the shaft head 12 is rotatably connected to the slide seat 13. Specifically, the axle seat 11 is protrudingly provided at one end of the auxiliary screen warehouse 5 close to the connecting seat 6, and a groove matching the axle seat 11 is provided on the connecting seat 6. The axle seat 11 is embedded in the groove, and the two ends of the axle seat 11 correspond to the two opposite inner walls of the groove. The inner wall of the groove has a hole and is connected to the interior of the connecting seat 6. The slide seat 13 moves in the connecting seat 6 and one end corresponds to the opening of the inner wall of the groove. The shaft head 12 passes through the opening to rotatably connect to the slide seat 13, and the moving direction of the slide seat 13 is perpendicular to the axial direction of the shaft head 12.

[0042] As a preferred technical solution of this embodiment, a connecting rod 14 connecting the two sliding seats 13 is arranged inside the connecting seat 6. An elastic member 15 is arranged between the connecting rod 14 and the inner wall of the connecting seat 6. A window 16 is arranged on the connecting seat 6. The middle part of the connecting rod 14 extends out of the window 16. Specifically, the two sliding seats 13 and the connecting rod 14 form a "C" shape; the elastic member 15 can preferably be a spring, and multiple springs can be arranged and symmetrically distributed; the arrangement of the elastic member 15 keeps the connecting rod 14 pushed close to the window 16 and the middle part extends out of the window 16. At this time, the sliding seat 13 pulls the shaft head 12, and then pulls the secondary screen bin 5 through the shaft seat 11 to keep it close to the connecting seat 6; when the connecting rod 14 in the window 16 is pushed, the connecting rod 14 drives the sliding seat 13 to move and resist the elastic member 15. The sliding seat 13 pushes the shaft head 12, and then pushes the secondary screen bin 5 to move away from the connecting seat 6 through the shaft seat 11. In actual use, due to the existence of the elastic member 15, the connecting rod 14 keeps corresponding to the window 16, and the secondary screen bin 5 keeps close to the connecting seat 6. When the secondary screen bin 5 is in the folded state, the inner side of the secondary screen bin 5 is attached to the connecting seat 6. When the secondary screen bin 5 switches from the folded state to the unfolded state, the rotation of the secondary screen bin 5 causes its inner side to squeeze the connecting seat 6. At this time, the shaft seat 11 is forced to move slightly outward from the connecting seat 6, and then the elastic member 15 is compressed in linkage to avoid interference when the inner side of the secondary screen bin 5 passes through the corner of the connecting seat 6. The same is true when the secondary screen bin 5 switches from the unfolded state to the folded state; when the secondary screen bin 5 is in the folded state, one end of it away from the connecting seat 6 is adsorbed by the magnetic member 9. At this time, pushing the connecting rod 14 from the window 16, the connecting rod 14 drives the sliding seat 13 to move and resist the elastic member 15. The sliding seat 13 pushes the shaft head 12, and then pushes the secondary screen bin 5 to move away from the connecting seat 6 through the shaft seat 11. The secondary screen bin 5 drives the second heat dissipation protrusion 8 to squeeze the first heat dissipation protrusion 7, so that the first heat dissipation protrusion 7 moves into the main screen bin 4 to drive the shielding assembly to open the heat dissipation port 10 in linkage. Since the magnetic member 9 continuously adsorbs the secondary screen bin 5, the secondary screen bin 5 can keep away from the connecting seat 6, and the elastic potential energy of the elastic member 15 is stored; when the heat dissipation port 10 can be closed, pushing the secondary screen bin 5 away from the connecting seat 6 and at this time one end extending out of the same side of the main screen bin 4, the secondary screen bin 5 drives the sliding seat 13 to move back through the shaft seat 11 and the shaft head 12. The sliding seat 13 drives the connecting rod 14 to move back to the position corresponding to the window 16. At the same time, the elastic member 15 releases the elastic potential energy. In addition, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 also return to their initial positions, that is, the first heat dissipation protrusion 7 extends out of the main screen bin 4 again to drive the shielding assembly to close the heat dissipation port 10 in linkage.

[0043] As a preferred technical solution of this embodiment, a heat sink 17 connected to each first heat dissipation protrusion 7 is provided in the main screen compartment 4, and the heat sink 17 is connected to the reflective plate 1 in the main screen compartment 4 through an elastic heat sink 18. Specifically, the first heat dissipation protrusion 7 and the heat sink 17 are integrally arranged to conduct the heat in the main screen compartment 4 to the outside, and the first heat sink 17 is movable in the main screen compartment 4; the elastic heat sink 18 is made of a heat-conducting material and is bent in a Z shape, and its two ends are respectively connected to the reflective plate 1 and the heat sink 17 to achieve heat conduction; the elastic heat sink 18 maintains elasticity so as to be able to conduct heat in a normal state. In the state, the reflecting plate 1 and the heat sink 17 are forced to be spaced apart, that is, the first heat dissipation protrusion 7 remains extended out of the main screen compartment 4; in actual use, during the opening of the heat dissipation port 10, the first heat dissipation protrusion 7 is squeezed by the second heat dissipation protrusion 8 and triggered to move into the main screen compartment 4, which drives the heat sink 17 close to the reflecting plate 1, so that the elastic heat sink 18 is elastically deformed and stores elastic potential energy, and then, during the closing of the heat dissipation port 10, the first heat dissipation protrusion 7 is not squeezed by the second heat dissipation protrusion 8, and the elastic heat sink 18 releases the elastic potential energy, so that the first heat dissipation protrusion 7 resumes to extend out of the main screen compartment 4.

[0044] As a preferred technical solution of this embodiment, the shielding assembly includes a shielding member 19 fixedly connected to the side of the heat sink 17, and the shielding member 19 is provided with a through-hole 20 matching the heat dissipation port 10. Specifically, the shielding member 19 moves with the heat sink 17, thereby adjusting the heat dissipation port 10 to correspond or stagger with the through-hole 20. When the first heat dissipation protrusion 7 moves into the main screen compartment 4, the movement of the heat sink 17 drives the shielding member 19, so that the through-hole 20 switches to correspond to the heat dissipation port 10, that is, the heat dissipation port 10 is opened for ventilation and heat dissipation; and when the first heat dissipation protrusion 7 moves out of the main screen compartment 4, the movement of the heat sink 17 drives the shielding member 19, so that the through-hole 20 switches to be staggered with the heat dissipation port 10, that is, the heat dissipation port 10 is blocked by the shielding member 19 and is closed.

[0045] As a preferred technical solution of this embodiment, a through hole 21 matching the first heat dissipation protrusion 7 is provided on the back side of the main screen compartment 4. Specifically, the through hole 21 is used for the first heat dissipation protrusion 7 to enter and exit the main screen compartment 4. At the same time, when the first heat dissipation protrusion 7 moves into the main screen compartment 4, the wedge-shaped matching shape of the outer end of the first heat dissipation protrusion 7 can enable the through hole 21 to form a breathable gap on the back side of the main screen compartment 4 after the first heat dissipation protrusion 7 is retracted into the main screen compartment 4, thereby further improving the heat dissipation of the main screen compartment 4 and realizing the efficient heat dissipation function of the main screen compartment 4 under high load.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A backlight module for a double-sided screen, characterized in that: The invention comprises a reflecting plate (1), a light-guiding layer (2) arranged in the reflecting plate (1), and a light source (3) arranged in the reflecting plate (1) and located on one side of the light-guiding layer (2), wherein the reflecting plate (1) comprises a flat plate portion (101) bonded to the light-guiding layer (2), a bent portion (102) bent in a C shape and arranged around the outside of the light source (3), and a coarse-grained portion (103) transitionally connected between the flat plate portion (101) and the bent portion (102), and an end of the light-guiding layer (2) close to the light source (3) is tightly bonded to the coarse-grained portion (103).

2. A display terminal, comprising the double-sided screen backlight module according to claim 1, characterized in that: It also includes a main screen compartment (4) and a secondary screen compartment (5), wherein a backlight module is arranged in the main screen compartment (4), a connecting seat (6) is arranged on the back side of the main screen compartment (4), and the secondary screen compartment (5) is hinged on the connecting seat (6).

3. The display terminal according to claim 2, characterized in that: The main screen compartment (4) and the auxiliary screen compartment (5) are folded with their back sides close to each other and in parallel. The back sides of the main screen compartment (4) and the auxiliary screen compartment (5) are respectively provided with a first heat dissipation protrusion (7) and a second heat dissipation protrusion (8). When the main screen compartment (4) and the auxiliary screen compartment (5) are folded, the first heat dissipation protrusion (7) and the second heat dissipation protrusion (8) abut against each other to form a heat dissipation gap between the main screen compartment (4) and the auxiliary screen compartment (5).

4. The display terminal according to claim 3, characterized in that: A magnetic attraction component (9) is provided on the back side of the main screen compartment (4) away from one end of the connecting seat (6). When the main screen compartment (4) and the auxiliary screen compartment (5) are folded, the auxiliary screen compartment (5) is adsorbed and fixed by the magnetic attraction component (9).

5. The display terminal according to claim 3, characterized in that: The side wall of the main screen compartment (4) is provided with a heat dissipation port (10), and a shielding component for controlling the switch of the heat dissipation port (10) is movably provided in the main screen compartment (4). The first heat dissipation protrusion (7) is movably provided on the main screen compartment (4) and is linked with the shielding component. When the main screen compartment (4) and the auxiliary screen compartment (5) are folded, the first heat dissipation protrusion (7) and the second heat dissipation protrusion (8) are staggered and wedge-shaped, and the auxiliary screen compartment (5) can be movably provided in parallel with the main screen compartment (4).

6. The display terminal according to claim 5, characterized in that: An axle seat (11) is arranged at one end of the auxiliary screen compartment (5) close to the connecting seat (6), and shaft heads (12) are arranged at both ends of the axle seat (11). A sliding seat (13) is elastically and movably arranged inside the connecting seat (6), and the shaft head (12) is rotatably connected to the sliding seat (13).

7. The display terminal according to claim 6, characterized in that: A connecting rod (14) connecting the two sliding seats (13) is arranged inside the connecting seat (6), an elastic member (15) is arranged between the connecting rod (14) and the inner wall of the connecting seat (6), a window (16) is arranged on the connecting seat (6), and a middle part of the connecting rod (14) extends out of the window (16).

8. The display terminal according to claim 5, characterized in that: A heat sink (17) connected to each first heat dissipation protrusion (7) is arranged in the main screen compartment (4), and the heat sink (17) is connected to the reflection plate (1) in the main screen compartment (4) through an elastic heat sink (18).

9. The display terminal according to claim 8, characterized in that: The shielding assembly comprises a shielding member (19) fixedly connected to the side of the heat dissipation plate (17), and a through opening (20) matching the heat dissipation opening (10) is provided on the shielding member (19).

10. The display terminal according to claim 5, characterized in that: The back side of the main screen compartment (4) is provided with a through hole (21) matching the first heat dissipation protrusion (7).

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