A backlight module for a double-sided screen and a display terminal

Abstract

The present invention discloses a backlight module and a display terminal for a double-sided screen, which includes a reflector, a light guide layer disposed within the reflector, and a light source disposed within the reflector and on one side of the light guide layer. The reflector includes a flat plate portion that is attached to the light guide layer, a bent portion that is bent in a C shape and surrounds the outside of the light source, and a coarse texture portion that is transitionally connected between the flat plate portion and the bent portion. One end of the light guide layer close to the light source is tightly attached to the coarse texture portion. By providing a reflector with a three-section structure, the flat plate portion of the present invention can normally achieve the reflection function, the bent portion can assist the light source to concentrate and output to the light guide layer, and the setting of the coarse texture portion, on the one hand, limits the distance between one end of the light guide layer and the light source under the condition of attaching to the light guide layer, and will not affect the light source even when the light guide layer heats up and expands. On the other hand, it can weaken the reflection effect of this part of the reflector, thereby avoiding the phenomenon of edge brightening on the display screen.

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 (LCDs) offer numerous advantages, including thinness, power efficiency, and radiation-free design, and are widely used in applications such as mobile phones, digital cameras, and computer and laptop screens. Most LCD devices currently on the market are backlit LCDs, which include a housing, a liquid crystal panel housed within the housing, and a backlight module housed within the housing. Because the LCD panel itself does not emit light, it relies on a backlight module to properly display images. Therefore, the backlight module is a key component of LCD devices. While existing backlight modules generally meet the requirements for display terminals, some shortcomings remain that require improvement.

[0003] Patent document CN103672620A, published on March 26, 2014, discloses a backlight module. Its technical solution includes: a backplane, a light guide plate disposed within the backplane, a backlight source disposed within the backplane and located on one side of the light guide plate, a light shield disposed between the backlight source and the backplane, and a side reflector disposed between the light guide plate and the backlight source. The backlight source includes an LED substrate and a plurality of LED lamps mounted on the LED substrate. The side reflector is elastic and has a plurality of openings corresponding to the LED lamps. The LED lamps are accommodated in the openings to provide light for the light guide plate. The beneficial effects of the backlight module are as follows: the elastic side reflector effectively buffers the deformation of the light guide plate caused by heat, thereby preventing the light guide plate from cracking due to the deformation of the light guide plate due to heat expansion. Furthermore, the metal light shield effectively prevents light emitted by the backlight source from leaking from the edge of the light guide plate, while enhancing the heat dissipation effect of the backlight module and improving the quality of the backlight module.

[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 effects such as squeezing the light source. 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 easily causes the bright edge phenomenon at the edge of the display screen. Therefore, there is an urgent need for a backlight module and display terminal for a double-sided screen to solve the above 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, comprising a reflector, a light guide layer disposed within the reflector, and a light source disposed within the reflector and on one side of the light guide layer. The reflector includes a flat plate portion that fits against the light guide layer, a bent portion that is bent into a C shape and surrounds the outside of the light source, and a coarse-grained portion that is transitionally connected between the flat plate portion and the bent portion. One end of the light guide layer close to the light source is tightly attached to the coarse-grained portion.

[0008] A display terminal includes the above-mentioned backlight module for a double-sided screen, and further includes a main screen compartment and a secondary screen compartment. The main screen compartment is provided with a backlight module, and a connection seat is provided on the back side of the main screen compartment. The secondary screen compartment is hinged to the connection seat.

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

[0010] Preferably, a magnetic attraction member is provided at one end of the back side of the main screen compartment away from the connection seat. When the main screen compartment and the secondary screen compartment are folded, the secondary screen compartment is adsorbed and fixed by the magnetic attraction member.

[0011] Preferably, a heat dissipation opening is provided on the side wall of the main screen compartment. A shielding assembly for controlling the opening and closing of the heat dissipation opening is movably provided within the main screen compartment. The first heat dissipation protrusion is movably provided on the main screen compartment and is linked with the shielding assembly. When the main screen compartment and the secondary screen compartment are folded, the first heat dissipation protrusion and the second heat dissipation protrusion are arranged in an alternating and wedge-shaped extrusion fit manner, and the secondary screen compartment can be movably arranged parallel to the main screen compartment.

[0012] Preferably, a shaft seat is provided at one end of the secondary screen compartment close to the connection seat. Shaft heads are provided at both ends of the shaft seat. A sliding seat is elastically and movably provided within the connection seat. The shaft head is rotatably connected to the sliding seat.

[0013] Preferably, a connecting rod connecting the two sliding seats is provided within the connection seat. An elastic member is provided between the connecting rod and the inner wall of the connection seat. A window is provided on the connection seat. The middle part of the connecting rod extends out of the window.

[0014] Preferably, a heat dissipation plate connecting each first heat dissipation protrusion is provided within the main screen compartment. The heat dissipation plate is connected to the reflector within the main screen compartment through an elastic heat dissipation fin.

[0015] Preferably, the shielding assembly includes a shielding member fixedly connected to the side of the heat dissipation plate. A through hole matching the heat dissipation opening is provided on the shielding member.

[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 as follows:

[0018] Through the setting of the reflector with a three-section structure, the flat part of the backlight module for the double-sided screen can normally achieve the reflection function, the bent part can assist the light source to concentrate and output to the light guide layer, and the setting of the rough part, on the one hand, limits the distance between one end of the light guide layer and the light source under the condition of fitting the light guide layer, and will not affect the light source even when the light guide layer heats up and expands. On the other hand, it can weaken the reflection effect of this part of the reflector, reduce the light reflection generated at the end of the light guide layer close to the light source, and thus avoid the edge brightening phenomenon on the display screen.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the present disclosure.

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

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

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

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

[0024] Figure 3 It is a schematic diagram of the front view sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 It is provided by an embodiment of the present invention Figure 3 The enlarged structure schematic diagram at A in;

[0026] Figure 5 It is provided by an embodiment of the present invention Figure 3 The enlarged structure schematic diagram at B in;

[0027] Figure 6 It is a schematic diagram of the partial structure of the reflector provided by an embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of the side view sectional structure provided by an embodiment of the present invention;

[0029] Figure 8Provided by the embodiment of the present invention Figure 7 Schematic enlarged structure diagram at C in

[0030] Figure 9 Schematic top view sectional structure diagram provided by the embodiment of the present invention.

[0031] Explanation of reference numerals:

[0032] 1. Reflector; 101. Flat plate part; 102. Bent part; 103. Coarse texture part; 2. Light guide layer; 3. Light source; 4. Main screen bin; 5. Sub-screen bin; 6. Connection seat; 7. First heat dissipation convex; 8. Second heat dissipation convex; 9. Magnetic part; 10. Heat dissipation port; 11. Axis seat; 12. Axis head; 13. Slide seat; 14. Link rod; 15. Elastic part; 16. Window; 17. Heat dissipation plate; 18. Elastic heat dissipation fin; 19. Shielding part; 20. Through hole; 21. Through hole. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0034] Please refer to Figures 1-9 , a backlight module for a double-sided screen provided by the embodiment of the present invention, comprising a reflector 1, a light guide layer 2 disposed in the reflector 1, and a light source 3 disposed in the reflector 1 and on one side of the light guide layer 2. The reflector 1 includes a flat plate part 101 attached to the light guide layer 2, a bent part 102 bent in a C shape and disposed around the outside of the light source 3, and a coarse texture part 103 that is transitionally connected between the flat plate part 101 and the bent part 102. One end of the light guide layer 2 close to the light source 3 is tightly attached to the coarse texture part 103.

[0035] Specifically, in addition to the reflector 1, the light guide layer 2, and the light source 3, the backlight module further includes a light mask 22, a lower diffusion film 23, a lower brightness enhancement film 24, an upper brightness enhancement film 25, and an upper diffusion film 26, which are specifically arranged as follows: The reflector 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 attached to the upper layer in sequence. The light source 3 is arranged on one side corresponding to the light guide layer 2, and the light mask 22 is arranged to surround the other sides of the light source 3; wherein, a reflective material is coated on the inner side of the reflector 1; the commonly used substrate of the light guide layer 2 is acrylic (PMMA), which is an optical material with extremely high reflectivity and a high factor material that does not absorb light; the light source 3 is preferably an LED strip; the lower diffusion film 23 and the upper diffusion film 26 are preferably made of PET material. When light passes through the diffusion layer with PET as the substrate, it will pass through carriers with different refractive indexes, causing a lot of refraction, reflection, and scattering of light, thereby changing the light to meet the effect of optical dispersion; the lower brightness enhancement film 24 and the upper brightness enhancement film 25, also known as prisms or brightness enhancement films (BEF), use the refraction and reflection of prisms to correct light, gather the light scattered by the light source in the front, and improve the overall brightness. The preferred material of the brightness enhancement film can be a PET substrate or a polycarbonate material substrate. A reflective material is coated on the inner side of the reflector 1 to reflect the light irradiated thereon to one side; the light guide layer 2 is used to conduct the light emitted by the light source 3 and form planar light; the light source 3 is preferably a cylindrical lamp, and its length matches the side length of the light guide layer 2 that is similar to it; the flat part 101 is the main body of the reflector 1, and a reflective material is coated on the side close to the light guide layer 2; the bent part 102 is coated with a reflective material around the inner side of the light source 3, which is equivalent to a light mask. One end of the light guide layer 2 close to the light source 3 just fills and blocks the opening side of the bent part 102, so that the light emitted by the light source 3 is concentrated and irradiated onto the light guide layer 2; the rough part 103 is set with a rough surface on the side close to the light guide layer 2 and is not coated with a reflective material. The light guide layer 2 is in close contact with the rough part 103 and cannot approach the light source 3 due to the resistance. In the actual use of this technical solution, with the setting of the reflector 1 with a three-section structure, the flat part 101 can normally achieve the reflection function, the bent part 102 can assist the light source 3 to concentrate and output to the light guide layer 2, and the setting of the rough part 103, on the one hand, limits the distance between one end of the light guide layer 2 and the light source 3 under the condition of being in contact with the light guide layer 2, and will not affect the light source 3 even when the light guide layer 2 expands due to heat. On the other hand, it can weaken the reflection effect of this part of the reflector 1, reduce the light reflection generated at one end of the light guide layer 2 close to the light source 3, and thus avoid the phenomenon of bright edges 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 reflector 1 with a three-segment structure. Its flat part 101 can normally achieve the reflection function, and the bent part 102 can assist the light source 3 to concentrate and output to the light guide layer 2. The setting of the rough part 103, on the one hand, limits the distance between one end of the light guide layer 2 and the light source 3 under the condition of fitting the light guide layer 2, and will not affect the light source 3 even when the light guide layer 2 expands due to heat. On the other hand, it can weaken the reflection effect of this part of the reflector 1, reduce the light reflection generated at one end of the light guide layer 2 close to the light source 3, and thus avoid the edge brightening phenomenon on the display screen.

[0037] A display terminal provided in another embodiment of the present invention includes the above-mentioned backlight module for a double-sided screen, and further includes a main screen compartment 4 and a secondary screen compartment 5. A backlight module is provided in the main screen compartment 4, and a connecting seat 6 is provided on the back side of the main screen compartment 4. The secondary screen compartment 5 is hinged to the connecting seat 6. Specifically, both the main screen compartment 4 and the secondary screen compartment 5 are in a flat shape; the connecting seat 6 protrudes on one side of the back side of the main screen compartment 4, and the protruding height is the same as the thickness of the secondary screen compartment 5; the secondary screen compartment 5 is hinged inside the connecting seat 6, and it has a folded state parallel to and fitting the main screen compartment 4 and an unfolded state forming a V shape with the main screen compartment 4 during the rotation process. The rotation range is preferably 45° to 90°; the sides of the main screen compartment 4 and the secondary screen compartment 5 away from each other are set as the display sides; when the main screen compartment 4 and the secondary screen compartment 5 are unfolded in a V shape, double-sided display can be realized, and it can be erected for use and two-way interaction; when the main screen compartment 4 and the secondary screen compartment 5 are folded, the main screen compartment 4 can be used for single-sided display as a tablet, and the size formed by the secondary screen compartment 5 and the connecting seat 6 is the same as the size of the main screen compartment 4.

[0038] As a preferred technical solution of this embodiment, the main screen compartment 4 and the secondary screen compartment 5 are folded in parallel with their back sides close to each other. First heat dissipation protrusions 7 and second heat dissipation protrusions 8 are respectively provided on the back sides of the main screen compartment 4 and the secondary screen compartment 5. When the main screen compartment 4 and the secondary screen compartment 5 are folded, the first heat dissipation protrusions 7 and the second heat dissipation protrusions 8 abut against each other to form a heat dissipation gap between the main screen compartment 4 and the secondary screen compartment 5. Specifically, the settings of the first heat dissipation protrusions 7 and the second heat dissipation protrusions 8 respectively increase the back side heat dissipation areas of the main screen compartment 4 and the secondary screen compartment 5, improving heat dissipation; when the main screen compartment 4 and the secondary screen compartment 5 are folded, the main screen compartment 4 is used for single-sided display as a tablet, and the heat dissipation of the back side is affected by the shielding of the secondary screen compartment 5. The settings of the first heat dissipation protrusions 7 and the second heat dissipation protrusions 8 can abut against each other at this time to promote the formation of a heat dissipation gap between the main screen compartment 4 and the secondary screen compartment 5 to help the main screen compartment 4 dissipate heat. In addition, the abutting contact of the first heat dissipation protrusions 7 and the second heat dissipation protrusions 8 forms a heat conduction path, and then the second heat dissipation protrusions 8 and the outer shell of the secondary screen compartment 5 also assist the main screen compartment 4 to dissipate heat, greatly increasing the heat dissipation area.

[0039] As a preferred technical solution of this embodiment, a magnetic component 9 is provided at one end of the back side of the main screen compartment 4 away from the connection seat 6. When the main screen compartment 4 and the secondary screen compartment 5 are folded, the secondary 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 secondary screen compartment 5.

[0040] In another embodiment proposed by the present invention, a heat dissipation port 10 is provided on the side wall of the main screen compartment 4. A shielding component for controlling the opening and closing of the heat dissipation port 10 is movably arranged in the main screen compartment 4. The first heat dissipation protrusion 7 is movably arranged on the main screen compartment 4 and is linked with the shielding component. When the main screen compartment 4 and the secondary screen compartment 5 are folded, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are arranged in an interleaved and wedge-shaped extrusion fit. Moreover, the secondary screen compartment 5 can be movably arranged parallel to the main screen compartment 4. Specifically, the heat dissipation port 10 is arranged on two opposite sides of the main screen compartment 4 that do not correspond to the connection seat 6 and the magnetic component 9; when the shielding component controls the opening of the heat dissipation port 10, the main screen compartment 4 can actively dissipate heat, and when the shielding component controls the closing of the heat dissipation port 10, it can prevent dust and impurities from invading; the first heat dissipation protrusion 7 moves in the inner and outer directions of the main screen compartment 4; a plurality of the first heat dissipation protrusions 7 and the second heat dissipation protrusions 8 are respectively arranged at equal intervals on the main screen compartment 4 and the secondary screen compartment 5. When the main screen compartment 4 and the secondary screen compartment 5 are folded, the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are parallel to each other and are arranged in an interleaved position, and the protruding height is less than the width of the heat dissipation gap formed between the main screen compartment 4 and the secondary screen compartment 5. In addition, the sides of the first heat dissipation protrusion 7 and the second heat dissipation protrusion 8 are in contact with each other and form a wedge-shaped fit; the parallel movement of the secondary screen compartment 5 relative to the main screen compartment 4 is set in the direction of approaching or departing from the connection seat 6; when the secondary screen compartment 5 moves parallelly away from the connection seat 6, that is, the end of the secondary screen compartment 5 away from the connection seat 6 moves out and protrudes from the same side of the main screen compartment 4, the secondary 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 and press 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 secondary screen compartment 5 moves parallelly closer to the connection seat 6 again, that is, the end of the secondary screen compartment 5 away from the connection seat 6 moves back into the same side of the main screen compartment 4, 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 a preferred technical solution of this embodiment, a shaft seat 11 is provided at one end of the secondary screen compartment 5 close to the connection seat 6. Shaft heads 12 are provided at both ends of the shaft seat 11. A sliding seat 13 is elastically and movably arranged in the connection seat 6. The shaft head 12 is rotatably connected to the sliding seat 13. Specifically, the shaft seat 11 protrudes at one end of the secondary screen compartment 5 close to the connection seat 6. A groove matching the shaft seat 11 is provided on the connection seat 6. The shaft seat 11 is embedded in the groove. The two ends of the shaft seat 11 correspond to the two opposite inner side walls of the groove. The inner side wall of the groove is provided with an opening that communicates with the inside of the connection seat 6. The sliding seat 13 moves in the connection seat 6 and one end corresponds to the opening on the inner side wall of the groove. The shaft head 12 passes through the opening to rotatably connect to the sliding seat 13. The moving direction of the sliding seat 13 is perpendicular to the axial direction of the shaft head 12.

[0042] As the preferred technical solution of this embodiment, a connecting rod 14 connecting the two slides 13 is provided in the connecting seat 6, an elastic member 15 is provided between the connecting rod 14 and the inner wall of the connecting seat 6, a window 16 is provided on the connecting seat 6, and the middle part of the connecting rod 14 extends out of the window 16. Specifically, the two slides 13 and the connecting rod 14 form a "匚" shape; the elastic member 15 can be preferably a spring, and multiple ones can be provided and symmetrically distributed; the setting of the elastic member 15 keeps the connecting rod 14 close to the window 16 and the middle part extends out of the window 16. At this time, the slide 13 pulls the shaft head 12, and then pulls the auxiliary screen compartment 5 through the shaft seat 11 to maintain a position close to the connecting seat 6; and when pushing the connecting rod 14 in the window 16, the connecting rod 14 drives the slide 13 to move and resists the elastic member 15, and the slide 13 pushes the shaft head 12, and then pushes the auxiliary screen compartment 5 to move away from the connecting seat 6 through the shaft seat 11. In actual use, due to the presence of the elastic member 15, the connecting rod 14 maintains the position of the corresponding window 16, and the auxiliary screen compartment 5 maintains a position close to the connecting seat 6. When the auxiliary screen compartment 5 is in the folded state, the inner side of the auxiliary screen compartment 5 is attached to the connecting seat 6. When the auxiliary screen compartment 5 switches from the folded state to the unfolded state, the rotation of the auxiliary screen compartment 5 causes the inner side to squeeze the connecting seat 6. At this time, the shaft seat 11 is forced to move slightly to the outside of the connecting seat 6, and then the elastic member 15 is compressed to meet the requirements of the inner side of the auxiliary screen compartment 5 passing through the corners of the connecting seat 6 to avoid interference. The same is true when the auxiliary screen compartment 5 switches from the unfolded state to the folded state; when the auxiliary screen compartment 5 is in the folded state, its end away from the connecting seat 6 is adsorbed by the magnetic member 9. At this time, the connecting rod 14 is pushed from the window 16, and the connecting rod 14 drives the slide 13 to move and resist the elastic member 15. The slide 13 pushes the shaft head 12, and then passes through The shaft seat 11 pushes the auxiliary screen compartment 5 to move away from the connecting seat 6, and the auxiliary screen compartment 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 compartment 4 to link the shielding component to open the heat dissipation port 10. Since the magnetic suction component 9 continues to adsorb the auxiliary screen compartment 5, the auxiliary screen compartment 5 can maintain a position away from the connecting seat 6, and the elastic potential energy of the elastic component 15 is stored; when the heat dissipation port 10 can be closed, the auxiliary screen compartment 5 is pushed away from the connecting seat 6 and extends out of the end on the same side of the main screen compartment 4 at this time. The auxiliary screen compartment 5 drives the slide 13 to move back through the shaft seat 11 and the shaft head 12, and the slide 13 drives the connecting rod 14 to move back to the position of the corresponding window 16. At the same time, the elastic component 15 releases its 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 compartment 4 again to link the shielding component to close the heat dissipation port 10.

[0043] As a preferred technical solution of this embodiment, a heat dissipation plate 17 for connecting each first heat dissipation protrusion 7 is arranged in the main screen compartment 4. The heat dissipation plate 17 is connected to the reflection plate 1 in the main screen compartment 4 through an elastic heat dissipation fin 18. Specifically, the first heat dissipation protrusion 7 and the heat dissipation plate 17 are integrally arranged for conducting the heat in the main screen compartment 4 outwards, and the first heat dissipation plate 17 is movable in the main screen compartment 4; the elastic heat dissipation fin 18 is made of a heat-conducting material and is bent in a Z shape, and both ends are respectively connected to the reflection plate 1 and the heat dissipation plate 17 to achieve heat conduction; the elastic heat dissipation fin 18 maintains elasticity to force the reflection plate 1 and the heat dissipation plate 17 to be spaced apart under normal conditions, that is, the first heat dissipation protrusion 7 remains protruding out of the main screen compartment 4; in actual use, during the opening process 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, then it drives the heat dissipation plate 17 to approach the reflection plate 1, causing the elastic heat dissipation fin 18 to elastically deform and store elastic potential energy. Then, during the closing process 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 dissipation fin 18 releases the elastic potential energy, causing the first heat dissipation protrusion 7 to resume protruding 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 dissipation plate 17. A through hole 20 matching the heat dissipation port 10 is arranged on the shielding member 19. Specifically, the shielding member 19 moves with the heat dissipation plate 17, thereby adjusting the correspondence or staggering between the heat dissipation port 10 and the through hole 20. When the first heat dissipation protrusion 7 moves into the main screen compartment 4, the movement of the heat dissipation plate 17 drives the shielding member 19, causing the through hole 20 to switch to correspond to the heat dissipation port 10, that is, the heat dissipation port 10 can be opened for ventilation and heat dissipation; when the first heat dissipation protrusion 7 moves out of the main screen compartment 4, the movement of the heat dissipation plate 17 drives the shielding member 19, causing the through hole 20 to switch to be misaligned with the heat dissipation port 10, that is, the heat dissipation port 10 is blocked by the shielding member 19 and closed.

[0045] As a preferred technical solution of this embodiment, a through hole 21 matching the first heat dissipation protrusion 7 is arranged on the back side of the main screen compartment 4. Specifically, the through hole 21 allows 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, under the wedge-shaped mating outer shape of the outer end of the first heat dissipation protrusion 7, an air-permeable gap can be formed 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, further improving the heat dissipation of the main screen compartment 4 and realizing the high-efficiency heat dissipation function of the main screen compartment 4 under high load.

[0046] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A display terminal, which includes a backlight module for a double-sided screen, and is characterized in that, It further includes a main screen compartment (4) and a secondary screen compartment (5). A backlight module is provided inside the main screen compartment (4), and a connecting seat (6) is provided on the back side of the main screen compartment (4). The secondary screen compartment (5) is hinged to the connecting seat (6). The main screen compartment (4) and the secondary screen compartment (5) are folded in parallel with their back sides close to each other. First heat dissipation protrusions (7) and second heat dissipation protrusions (8) are respectively provided on the back sides of the main screen compartment (4) and the secondary screen compartment (5). When the main screen compartment (4) and the secondary screen compartment (5) are folded, the first heat dissipation protrusions (7) and the second heat dissipation protrusions (8) abut against each other to form a heat dissipation gap between the main screen compartment (4) and the secondary screen compartment (5). A magnetic part (9) is provided at one end of the back side of the main screen compartment (4) far from the connecting seat (6). When the main screen compartment (4) and the secondary screen compartment (5) are folded, the secondary screen compartment (5) is adsorbed and fixed by the magnetic part (9). A heat dissipation port (10) is provided on the side wall of the main screen compartment (4). A shielding component for controlling the opening and closing of the heat dissipation port (10) is movably provided inside 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 secondary screen compartment (5) are folded, the first heat dissipation protrusion (7) and the second heat dissipation protrusion (8) are arranged in an interleaved and wedge-shaped extrusion fit manner, and the secondary screen compartment (5) can be movably arranged parallel to the main screen compartment (4). When the secondary screen compartment (5) moves parallelly away from the connecting seat (6), the secondary 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, so that the first heat dissipation protrusion (7) moves into the main screen compartment (4), thereby linking the shielding component to open the heat dissipation port (10).

2. The display terminal according to claim 1, characterized in that, A shaft seat (11) is provided at one end of the secondary screen compartment (5) close to the connecting seat (6). Shaft heads (12) are provided at both ends of the shaft seat (11). A sliding seat (13) is elastically movably provided inside the connecting seat (6), and the shaft heads (12) are rotatably connected to the sliding seat (13).

3. The display terminal according to claim 2, wherein A connecting rod (14) connecting the two sliding seats (13) is provided inside the connecting seat (6). An elastic part (15) is provided between the connecting rod (14) and the inner wall of the connecting seat (6). A window (16) is provided on the connecting seat (6), and the middle part of the connecting rod (14) extends out of the window (16).

4. The display terminal according to claim 1, wherein A heat dissipation plate (17) connecting each of the first heat dissipation protrusions (7) is provided inside the main screen compartment (4). The heat dissipation plate (17) is connected to the reflector (1) inside the main screen compartment (4) through elastic heat dissipation fins (18).

5. The display terminal according to claim 4, characterized in that, The shielding component includes a shielding part (19) fixedly connected to the side of the heat dissipation plate (17). A through hole (20) matching the heat dissipation port (10) is provided on the shielding part (19).

6. The display terminal according to claim 1, wherein A through hole (21) matching the first heat dissipation protrusion (7) is provided on the back side of the main screen compartment (4).

Images