Flexible display panel and lower frame structure thereof

Abstract

The invention discloses a flexible display panel and a lower frame structure thereof. The lower frame structure comprises a frame assembly, a heat conduction assembly and a soaking assembly. The frame assembly is used for installing and fixing a display panel, the heat conduction assembly is used for conducting out heat generated by the back face of the display panel in operation, and the soaking assembly is used for conducting large-range uniform heat dissipation on the conducted-out heat so as to prevent the situation that the heat cannot be conducted out in time. Efficient export of operation heat of the display panel is achieved through the heat conduction copper pipe, the top of the copper pipe penetrates through the fixing plate, heat generated on the back face of the display screen can be rapidly transmitted out, and the situation that the performance and the service life of the display panel are affected due to the fact that the temperature of the display panel is too high due to heat accumulation is avoided; the stability of the display panel in the operation process is guaranteed, and the situation that heat spreads to the gluing position of the display panel, glue is heated and aged, and the lower frame structure is loosened and falls off is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the field of flexible display technology, and in particular to a flexible display panel and a lower frame structure thereof. Background Art

[0002] Nowadays, flexible display devices have gradually become the new favorite in the panel display field. Flexible curved screen mobile phones with fixed curvature have also become increasingly popular products due to their ultra-narrow bezels or even bezel-free designs. Flexible display panels require a lower bezel structure for their installation.

[0003] Current flexible display panels and their lower frame structures, such as the one disclosed in Chinese Patent Publication No. "CN107958637B," require adhesive bonding to the outside of the screen during installation. However, when the panel is operating, it continuously generates a large amount of heat. When heat spreads to the adhesive, it can easily cause the glue to age, loosening and falling off the lower frame structure, resulting in an unstable operating environment or even malfunction of the display panel. Accordingly, the present invention provides a flexible display panel and its lower frame structure. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a flexible display panel and a lower frame structure thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A lower frame structure of a flexible display panel, comprising a frame component, a heat conduction component and a heat spreading component; The frame assembly is used to install and fix the display panel, and the frame assembly includes a PCB base plate and a fixed frame fixedly connected to the top of the PCB base plate; The heat conducting assembly is used to conduct heat dissipation from the back of the display panel during operation, and the heat conducting assembly includes two fixing plates fixedly connected to the bottom of the PCB base plate; The heat spreading assembly is used to evenly dissipate the heat dissipated over a large area to prevent the heat from not being discharged in time. The heat spreading assembly includes a plurality of rotating rings rotatably connected to adjacent sides of two fixed plates.

[0006] Preferably, a display screen is fixedly connected to the inside of the fixed frame and is fixedly connected to the PCB base board. An integrated interface is fixedly provided on one side of the PCB base board, and a chip processing interface is fixedly provided on the side of the PCB base board close to the integrated interface.

[0007] Preferably, a heat dissipation groove is provided on the PCB base plate, the two fixed plates are located above the heat dissipation groove, and a plurality of heat-conducting copper tubes are fixedly connected to the bottom of the display screen, and the top of each heat-conducting copper tube passes through the two fixed plates.

[0008] Preferably, the rotating collars are evenly and equidistantly distributed on the two fixed plates and are arranged axially symmetrically. The rotating collars are all sleeved on the outside of the heat-conducting copper tube. A thermal expansion torsion spring is fixedly connected between the inner wall of the rotating collar and the heat-conducting copper tube. A heat spreader is fixedly connected between the bottoms of each two relative rotating collars. A plurality of heat dissipation holes are opened on the heat spreader, and a heat-conducting arc plate is fixedly connected to the bottom of the heat spreader.

[0009] Preferably, the heat-conducting copper tube is arranged in an "O"-shaped structure.

[0010] Preferably, the thermal expansion torsion spring is made of a bimetallic material with a large difference in thermal expansion coefficient, and can produce deformation and torsion at around degrees Celsius.

[0011] Preferably, the inner arc-shaped wall of the heat-conducting arc-shaped plate can be tightly fitted with the heat-conducting copper tube so as to conduct heat to the heat spreader.

[0012] A flexible display panel comprises a display screen, a PCB base board and a lower frame structure as described in any one of the above items, wherein the output end of the lower frame structure is connected to the display screen through the PCB base board.

[0013] The present invention has the following beneficial effects: 1. By setting up a thermal conductive component and a specially designed thermal conductive copper tube, the heat generated by the display panel can be efficiently dissipated. A heat dissipation slot is opened on the PCB base board, and several thermal conductive copper tubes are fixedly connected to the bottom of the display screen. The top of the copper tube passes through the fixed plate, which can quickly transfer the heat generated on the back of the display screen. This not only avoids the display panel temperature from being too high due to heat accumulation, affecting its performance and service life, and ensuring the stability and reliability of the display panel during long-term operation, but also effectively prevents heat from spreading to the adhesive of the display panel, causing the glue to age due to heat, and causing the lower frame structure to loosen and fall off.

[0014] 2. By setting up a heat spreader assembly, when the display panel generates heat and the temperature rises, the thermal expansion torsion spring deforms and drives the rotating ring to rotate, causing the position of the heat spreader to change, increasing the contact area with the air. Cooperating with the heat dissipation holes on the heat spreader, the heat dissipation is accelerated. At the same time, the heat conductive arc plate fits tightly with the heat conductive copper tube, quickly transferring heat to the heat spreader, achieving large-scale uniform heat dissipation, effectively preventing local excessive heat, and further improving the heat dissipation efficiency and effect.

[0015] 3. By setting up a frame assembly, the combination of the PCB base board and the fixed frame in the frame assembly provides a stable installation and fixing method for the display panel, ensuring that the display panel will not easily shake or shift during use. In addition, the integrated interface and chip processing interface set on one side of the PCB base board facilitate the connection and integration of the display panel with other electronic components or devices, meeting the needs of display panel function expansion in different application scenarios, and has good versatility and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the lower frame structure of a flexible display panel proposed by the present invention; Figure 2 This is a structural schematic diagram of the bottom portion of the lower frame structure of a flexible display panel proposed in the present invention; Figure 3 This is a schematic diagram of the structure inside the heat dissipation tank of the present invention; Figure 4 Schematic diagram of the structure of the heat soaking assembly in the present invention; Figure 5 Schematic diagram of the structure of the heat conduction component in the present invention; Figure 6 It is a structural schematic diagram of the combination of the heat conducting component and the heat dissipating component in the present invention.

[0017] In the figure: 1 PCB base board, 2 fixed frame, 3 display screen, 4 integrated interface, 5 chip processing interface, 6 heat sink, 7 fixed plate, 8 thermal copper tube, 9 rotating ring, 10 thermal expansion torsion spring, 11 heat spreader, 12 heat dissipation hole, 13 thermal arc plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1:

[0019] Reference Figure 1-Figure 4 , a lower frame structure of a flexible display panel, including a frame component, a heat conduction component and a heat spreading component; The frame assembly is used to install and fix the display panel. The frame assembly includes a PCB base plate 1 and a fixed frame 2 fixedly connected to the top of the PCB base plate 1; The heat conducting assembly is used to conduct heat generated by the back of the display panel in operation. The heat conducting assembly includes two fixing plates 7 fixedly connected to the bottom of the PCB base plate 1; The heat spreader is used to evenly dissipate the heat evenly over a wide range to prevent the heat from not being discharged in time. The heat spreader includes a plurality of rotating rings 9 rotatably connected to adjacent sides of two fixed plates 7. A display screen 3 fixedly connected to the PCB base board 1 is fixedly connected to the interior of the fixed frame 2. An integrated interface 4 is fixedly provided on one side of the PCB base board 1. A chip processing interface 5 is fixedly provided on the side of the PCB base board 1 close to the integrated interface 4. A heat dissipation slot 6 is provided on the PCB base plate 1. Two fixing plates 7 are located above the heat dissipation slot 6. A plurality of heat-conducting copper tubes 8 are fixedly connected to the bottom of the display screen 3. The top of each heat-conducting copper tube 8 passes through the two fixing plates 7. The heat-conducting copper tube 8 is arranged in an "O"-shaped structure; In this embodiment, when the display panel is operating, the heat generated on the back of the display screen 3 is quickly absorbed by the heat-conducting copper tube 8. Due to its "O"-shaped structure, the heat is retained at the bottom of the heat-conducting copper tube 8 for a shorter time, effectively absorbing and transporting the heat. The heat is then rapidly transferred to the fixing plate 7 through the portion that passes through the fixing plate 7, which then conducts the heat away from the display screen 3 area, creating conditions for subsequent heat dissipation and heat dissipation. This effectively achieves the beneficial effect of "efficient heat conduction to ensure stable operation of the display panel" and effectively prevents the spread of heat on the display screen 3, thereby preventing the glue at the bonding point between the display panel and the frame from aging due to heat, thereby preventing the lower frame structure from loosening and falling off. Example 2:

[0020] Reference Figure 3-Figure 6 Compared with the first embodiment, the rotating rings 9 in this embodiment are evenly and equidistantly distributed on the two fixed plates 7 and are arranged axially symmetrically. The rotating rings 9 are all sleeved on the outside of the heat-conducting copper tube 8. A thermal expansion torsion spring 10 is fixedly connected between the inner wall of the rotating ring 9 and the heat-conducting copper tube 8. A heat spreader 11 is fixedly connected between the bottoms of every two opposing rotating rings 9. A plurality of heat dissipation holes 12 are opened on the heat spreader 11, and a heat-conducting arc plate 13 is fixedly connected to the bottom of the heat spreader 11.

[0021] The thermal expansion torsion spring 10 is made of a bimetallic material with a large difference in thermal expansion coefficient, and can produce deformation and twisting at around 30 degrees Celsius. The inner arc wall of the heat-conducting arc plate 13 can fit tightly with the heat-conducting copper tube 8 to conduct heat to the heat spreader 11.

[0022] In this embodiment, when the display panel generates heat during operation, causing the temperature to rise to approximately 30 degrees Celsius, the thermal expansion torsion spring 10 deforms due to the different thermal expansion coefficients of the bimetallic strip materials, driving the rotating ring 9 to rotate. The rotation of the rotating ring 9 causes the position of the vapor chamber 11 to change, adjusting the originally relatively compact layout of the vapor chamber 11 and increasing the contact area between the vapor chamber 11 and the air. The heat dissipation holes 12 on the vapor chamber 11 now cooperate with the increased contact area to accelerate heat dissipation to the surrounding air. Simultaneously, heat from the thermally conductive copper tube 8 is rapidly transferred to the vapor chamber 11 through the tightly fitting thermally conductive curved plate 13. The vapor chamber 11, with its large surface area and excellent thermal conductivity, evenly distributes the heat, achieving uniform heat dissipation over a wide area. This intelligent heat distribution method effectively prevents localized overheating. For example, in the chip-concentrated area of the display panel, even if the heat generation is high, the heat can be promptly distributed through the heat distribution component, preventing damage to the display panel due to local overheating. This greatly improves the heat dissipation effect and fully embodies the concept of "intelligent heat distribution, improved heat dissipation effect." The beneficial effect is that in different usage environments, such as high temperature environments or long-term continuous working scenarios, the heat spreader can adaptively adjust the heat dissipation state to ensure that the display panel is always in a good operating temperature range, extend the service life of the display panel, and further prevent the glue between the display panel and the frame from aging due to heat.

[0023] In addition, when the handheld device equipped with a flexible display panel is used lightly, the thermal expansion torsion spring 10 will not deform when the overall display panel temperature does not exceed 30 degrees Celsius, so the heat dissipation effect will not be turned on at full power to prevent continuous heat dissipation at full power when the device is used lightly, causing the local temperature of the device casing to be too high, causing discomfort to the user. When the user uses the device heavily and the temperature continues to rise to 30 degrees Celsius or above, the thermal expansion torsion spring 10 changes the position of the heat spreader 11, increases the contact area with the air, and cooperates with the heat dissipation holes 12 on the heat spreader 11 to accelerate heat dissipation. At the same time, the heat-conducting arc plate 13 fits tightly against the heat-conducting copper tube 8, and quickly conducts heat to the heat spreader 11, realizing large-scale and uniform heat dissipation, further improving the heat dissipation efficiency and effect, to prevent the display panel temperature from being too high.

[0024] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lower frame structure of a flexible display panel, comprising a frame assembly, a heat conducting assembly, and a heat spreading assembly, characterized in that: The frame assembly is used to install and fix the display panel, and the frame assembly comprises a PCB base plate (1) and a fixed frame (2) fixedly connected to the top of the PCB base plate (1); The heat-conducting component is used to conduct heat dissipation treatment on the back of the display panel in operation, and the heat-conducting component comprises two fixing plates (7) fixedly connected to the bottom of the PCB base plate (1); The heat spreading component is used to evenly dissipate the heat dissipated over a large area to prevent the heat from not being dissipated in time. The heat spreading component includes a plurality of rotating collars (9) rotatably connected to adjacent sides of two fixed plates (7).

2. The lower frame structure according to claim 1, characterized in that: A display screen (3) fixedly connected to the PCB base plate (1) is fixedly connected inside the fixed frame (2); an integrated interface (4) is fixedly provided on one side of the PCB base plate (1); and a chip processing interface (5) is fixedly provided on a side of the PCB base plate (1) close to the integrated interface (4).

3. The lower frame structure according to claim 2, characterized in that: A heat dissipation groove (6) is provided on the PCB base plate (1), and the two fixing plates (7) are located above the heat dissipation groove (6). A plurality of heat-conducting copper tubes (8) are fixedly connected to the bottom of the display screen (3), and the top of each heat-conducting copper tube (8) passes through the two fixing plates (7).

4. The lower frame structure according to claim 3, characterized in that: The rotating sleeves (9) are evenly and equidistantly distributed on the two fixed plates (7) and are arranged in an axisymmetric manner. The rotating sleeves (9) are all sleeved on the outside of the heat-conducting copper tube (8). A thermal expansion torsion spring (10) is fixedly connected between the inner wall of the rotating sleeve (9) and the heat-conducting copper tube (8). A heat spreader (11) is fixedly connected between the bottoms of each two relative rotating sleeves (9). A plurality of heat dissipation holes (12) are opened on the heat spreader (11). A heat-conducting arc plate (13) is fixedly connected to the bottom of the heat spreader (11).

5. The lower frame structure according to claim 3, characterized in that: The heat-conducting copper tube (8) is arranged in an "O"-shaped structure.

6. The lower frame structure according to claim 4, characterized in that: The thermal expansion torsion spring (10) is made of a bimetallic material with a large difference in thermal expansion coefficient, and can produce deformation and torsion at around 30 degrees Celsius.

7. The lower frame structure according to claim 4, characterized in that: The inner arc-shaped wall of the heat-conducting arc-shaped plate (13) and the heat-conducting copper tube (8) can be tightly fitted together to conduct heat to the heat-spreading plate (11).

8. A flexible display panel, characterized in that: It comprises a display screen (3), a PCB base board (1) and a lower frame structure according to any one of claims 1 to 7, wherein the output end of the lower frame structure is connected to the display screen (3) via the PCB base board (1).

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