Foldable flat light guide plate hinge structure
Patent Information
- Application Number
- CN202522023606.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0003]在光学组件设计层面，传统折叠屏导光结构面临关键技术瓶颈：常规方案多采用亚克力作为导光板基材，但受限于材料力学特性，当亚克力板厚度超过一点五毫米时，其抗弯折强度将急剧下降，导致折叠过程中出现不可逆的塑性形变甚至断裂
[0012]本实用新型的有益效果是：本实用新型通过多级铰接连接组件与弹性填充结构的协同设计，突破了厚型导光板折叠的技术瓶颈，既实现厚型亚克力导光板的可靠弯折，又保持较高的透光率，成功兼顾屏幕亮度均匀性、光学效率与设备耐用性。
Smart Images
Figure CN224907054U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flat panel display technology, and in particular to a hinge structure for a foldable flat panel light guide plate. Background Technology
[0002] As an innovative breakthrough in the field of smart terminals, foldable screen electronic devices have achieved leapfrog development in materials science and mechanical design in recent years. Their core advantage lies in the ability to achieve "dual-mode" scenario integration through variable form factor design. When unfolded, the screen size can be expanded to tablet level, providing an ideal platform for multitasking, immersive audio-visual entertainment, and efficient business office work. When folded, the device volume is reduced by more than 50%, balancing portability and one-handed operation experience, precisely meeting users' dual needs for "large-screen productivity" and "lightweight travel" in mobile office scenarios.
[0003] At the optical component design level, traditional foldable screen light guide structures face a key technical bottleneck: conventional solutions mostly use acrylic as the substrate for the light guide plate, but due to the material's mechanical properties, when the acrylic plate thickness exceeds 1.5 mm, its bending strength drops sharply, leading to irreversible plastic deformation or even breakage during folding. This contradiction between material properties and structural strength directly restricts the application of thick light guide plates in foldable screens, forcing the industry to compromise between screen brightness uniformity, optical efficiency, and device durability. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, the present invention provides a foldable flat light guide plate hinge structure.
[0005] The technical solution of this utility model is as follows: a foldable flat light guide plate hinge structure, including a light guide plate a, a light guide plate b, a hinge assembly and a filling assembly. A connecting assembly is provided between the front sides of the light guide plate a and the light guide plate b to assist in bending or folding between the light guide plate a and the light guide plate b. A filling assembly is provided on the hinge assembly to optically seal the connection area of the light guide plate a, the light guide plate b and the hinge assembly to meet the overall light transmittance.
[0006] As a preferred technical solution of this utility model, the connecting component includes an mounting strip, a fixing plate, a hinge plate a, and a hinge plate b. The front sides of both light guide plates a and b are fixedly connected to the mounting strip. Multiple fixing plates are fixedly connected to the front sides of both mounting strips at intervals. The front side of each fixing plate is hinged to a hinge plate a. A hinge plate b is connected between two adjacent hinge plates a. The hinge plate b and the adjacent hinge plate a are all hinged connections.
[0007] As a preferred technical solution of this utility model, the light guide plate a and the light guide plate b are all integrally molded with the adjacent mounting strip and fixing plate.
[0008] As a preferred technical solution of this utility model, the filling component includes a wrapping film, and the wrapping film is fixedly connected between the outer walls of the two mounting strips. The wrapping film has a cavity inside for accommodating the fixing plate, hinge plate a and hinge plate b, and the cavity is filled with light-transmitting adhesive.
[0009] As a preferred technical solution of this utility model, it also includes protrusions, and grooves are provided in the middle of the outer walls of the two mounting strips along the circumference, and protrusions are provided in the inner wall of the wrapping film and the two grooves respectively.
[0010] As a preferred technical solution of this utility model, the light-transmitting adhesive is made of optical-grade silicone.
[0011] As a preferred technical solution of this utility model, the wrapping film is made of polyester film.
[0012] The beneficial effects of this utility model are: through the collaborative design of multi-level hinged connection components and elastic filling structure, this utility model breaks through the technical bottleneck of folding thick light guide plates, which not only realizes the reliable bending of thick acrylic light guide plates, but also maintains high light transmittance, and successfully balances screen brightness uniformity, optical efficiency and equipment durability. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0014] Figure 2 This is a three-dimensional structural diagram of the light guide plate 2, mounting strip, and fixing plate of this utility model.
[0015] Figure 3 This is a three-dimensional structural diagram of the fixed plate, hinge plate a, and hinge plate b of this utility model.
[0016] Figure 4 This is a three-dimensional structural diagram of the wrapping film and protrusions of this utility model.
[0017] Among them: 1. Light guide plate a, 2. Light guide plate b, 3. Mounting strip, 4. Fixing plate, 5. Hinge plate a, 6. Hinge plate b, 7. Wrapping film, 71. Cavity, 8. Groove, 9. Protrusion. Detailed Implementation
[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0019] Example: Foldable flat light guide plate hinge structure, such as Figure 1-4As shown, it includes a light guide plate a1, a light guide plate b2, a hinge assembly, and a filling assembly. A connecting assembly is provided between the front sides of the light guide plate a1 and the light guide plate b2 to connect the light guide plate a1 and the light guide plate b2, thereby assisting in bending or folding between the light guide plate a1 and the light guide plate b2. A filling assembly is provided on the hinge assembly to optically seal the connection area of the light guide plate a1, the light guide plate b2, and the hinge assembly to meet the overall light transmittance requirements.
[0020] like Figure 2 , Figure 3 and Figure 4 As shown, the connecting assembly includes mounting strips 3, fixing plates 4, hinge plates a5 and b6. The mounting strips 3 are fixedly connected to the front sides of both light guide plates a1 and b2. Multiple fixing plates 4 are fixedly connected to the front sides of both mounting strips 3 at intervals. The hinge plates a5 are hinged to the front sides of each fixing plate 4. The hinge plates b6 are connected between two adjacent hinge plates a5. The hinge plates b6 and the adjacent hinge plates a5 are hinged. The light guide plates a1 and b2, along with the adjacent mounting strips 3 and fixing plates 4, are all integrally molded.
[0021] like Figure 1 and Figure 4 As shown, the filling component includes a wrapping film 7, which is fixedly connected between the outer walls of the two mounting strips 3. The wrapping film 7 is made of polyester film and is fixed to the outer walls of the two mounting strips 3 at both ends by high-purity UV-curable adhesive. After curing, the light transmittance is >95% and the refractive index is close to that of acrylic, reducing light path interference. The wrapping film 7 has a cavity 71 inside for accommodating the fixing plate 4, the hinge plate a5 and the hinge plate b6. The cavity 71 is filled with light-transmitting adhesive, which is made of optical grade silicone. Optical grade silicone is a type of silicone rubber material with high elasticity and strong resilience. It is not easy to break or undergo permanent deformation even if folded for a long time.
[0022] During the assembly stage of the flat panel, the light guide plate a1, the light guide plate b2, the connecting component, and the filling component are sandwiched between the lower reflective film and the upper diffuser film. The diffuser film is provided with a BEF film, etc. Finally, the lowermost glue iron and the uppermost flexible screen bend and limit the middle layers. Initially, the fixing plate 4, the hinge plate a5, and the hinge plate b6 are at the same level, and the wrapping film 7 is filled with light-transmitting adhesive. At this time, the light guide plate a1, the connecting component, the filling component, and the light guide plate b2 can be used as a whole and have good light transmittance, which can meet the normal light guiding function. After bending, the connecting component acts as a connecting skeleton between the light guide plate a1 and the light guide plate b2 to prevent the position of the light guide plate a1 or the light guide plate b2 from changing. The wrapping film 7 and the light-transmitting adhesive deform after bending, but the light-transmitting adhesive can still fill the wrapping film 7 and maintain good light transmittance.
[0023] like Figure 4 As shown, it also includes protrusions 9, and grooves 8 are provided circumferentially in the middle of the outer walls of the two mounting strips 3. The inner wall of the wrapping film 7 and the two grooves 8 are respectively provided with protrusions 9.
[0024] By setting the groove 8 and the protrusion 9, the contact area between the wrapping film 7 and the mounting strip 3 is increased, resulting in a more stable connection after UV curing.
[0025] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims
1. A foldable flat light guide plate hinge structure, characterized in that: It includes a light guide plate a (1), a light guide plate b (2), a hinge assembly, and a filling assembly. A connecting assembly is provided between the front sides of the light guide plate a (1) and the light guide plate b (2). The connecting assembly is used to connect the light guide plate a (1) and the light guide plate b (2) to assist in bending or folding between the light guide plate a (1) and the light guide plate b (2). A filling assembly is provided on the hinge assembly. The filling assembly is used to optically seal the connection area of the light guide plate a (1), the light guide plate b (2), and the hinge assembly to meet the overall light transmittance.
2. The foldable flat light guide plate hinge structure as described in claim 1, characterized in that: The connecting components include mounting strips (3), fixing plates (4), hinge plates a (5) and hinge plates b (6). Mounting strips (3) are fixedly connected to the front sides of light guide plates a (1) and light guide plates b (2). Multiple fixing plates (4) are fixedly connected to the front sides of the two mounting strips (3) at intervals. Hinged plates a (5) are hinged to the front sides of the fixing plates (4). Hinged plates b (6) are connected between two adjacent hinge plates a (5). Hinged plates b (6) and adjacent hinge plates a (5) are hinged.
3. The foldable flat light guide plate hinge structure as described in claim 2, characterized in that: The light guide plate a (1) and the light guide plate b (2) are all integrally molded with the adjacent mounting strip (3) and fixing plate (4).
4. The foldable flat light guide plate hinge structure as described in claim 3, characterized in that: The filling component includes a wrapping film (7), which is fixedly connected between the outer walls of the two mounting strips (3). The wrapping film (7) has a cavity (71) inside for accommodating the fixing plate (4), hinge plate a (5) and hinge plate b (6), and the cavity (71) is filled with light-transmitting adhesive.
5. The foldable flat light guide plate hinge structure as described in claim 4, characterized in that: It also includes protrusions (9), and grooves (8) are provided in the middle of the outer wall of the two mounting strips (3) along the circumferential direction. Protrusions (9) are provided in the inner wall of the wrapping film (7) and the two grooves (8).
6. The foldable flat light guide plate hinge structure as described in claim 5, characterized in that: The translucent adhesive is made of optical-grade silicone.
7. The foldable flat light guide plate hinge structure as described in claim 6, characterized in that: The wrapping film (7) is made of polyester film.