Splicing screen unit and display module

Abstract

This disclosure provides a splicing screen unit, including a display panel, a frame, a sound-generating excitation unit, and a support structure. The frame, sound-generating excitation unit, and support structure are located on the back side of the display panel. The support structure supports the sound-generating excitation unit. The back side of the display panel includes a central region and an edge region. The sound-generating excitation unit contacts the central region and is used to excite the display panel to vibrate and emit sound. The orthographic projection of the frame on the back side of the display panel is located in the edge region and is used to support the display panel. The frame includes a first sub-part and a second sub-part. The orthographic projection of the second sub-part on the back side of the display panel is closer to the central region than the orthographic projection of the first sub-part on the back side of the display panel. A first vibration isolation part is provided between the first sub-part and the display panel. A second vibration isolation part is provided between the second sub-part and the display panel. The thickness of the first vibration isolation part is smaller than the thickness of the second vibration isolation part.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a splicing screen unit and a display module. Background Technology

[0002] Sound-emitting display screens can output sound from the display screen, achieving overlap between sound and images and enhancing the user's viewing and listening experience. Summary of the Invention

[0003] This disclosure provides a splicing screen unit and a display module.

[0004] In a first aspect, embodiments of this disclosure provide a splicing screen unit, including a display panel, a frame, a sound excitation unit, and a support structure; the frame, the sound excitation unit, and the support structure are located on the back side of the display panel;

[0005] The support structure is located on the side of the sound-generating excitation unit opposite to the display panel, and is used to support the sound-generating excitation unit;

[0006] The back of the display panel includes a central area and an edge area;

[0007] The sound-generating excitation unit is in contact with the central area and is used to excite the display panel to vibrate and emit sound;

[0008] The orthographic projection of the frame on the back side of the display panel is located in the edge region, and is used to support the display panel;

[0009] The frame includes a first sub-part and a second sub-part, wherein the orthographic projection of the second sub-part on the back side of the display panel is closer to the central region than the orthographic projection of the first sub-part on the back side of the display panel.

[0010] A first vibration isolation portion is provided between the first sub-part and the display panel; a second vibration isolation portion is provided between the second sub-part and the display panel; the thickness of the first vibration isolation portion is less than the thickness of the second vibration isolation portion.

[0011] In some embodiments, the second sub-part is formed by extending from one side of the first sub-part closer to the central region in a direction closer to the central region;

[0012] The distance between the side of the second sub-part closest to the display panel and the edge region is greater than the distance between the side of the first sub-part closest to the display panel and the edge region.

[0013] In some embodiments, the second sub-part is formed by extending from one side of the first sub-part near the central region in a direction closer to the central region, then in a direction away from the display panel, and then in a direction closer to the central region.

[0014] The distance between the side of the second sub-part closest to the display panel and the edge region is greater than the distance between the side of the first sub-part closest to the display panel and the edge region.

[0015] In some embodiments, the second sub-part is formed by a portion of the first sub-part extending from a side of the display panel away from the display panel, first in a direction away from the display panel, and then in a direction closer to the central region;

[0016] The distance between the side of the second sub-part closest to the display panel and the edge region is greater than the distance between the side of the first sub-part closest to the display panel and the edge region.

[0017] In some embodiments, the second sub-part is located on the side of the first sub-part away from the display panel, the second sub-part overlaps with the orthographic projection portion of the first sub-part on the back side of the display panel, and the second sub-part and the first sub-part are connected to each other at the orthographic projection overlap position.

[0018] A third vibration isolation section is also provided between the second sub-section and the first sub-section.

[0019] In some embodiments, the thickness of the second vibration isolation portion is equal to the sum of the thicknesses of the first vibration isolation portion, the first sub-portion, and the third vibration isolation portion.

[0020] In some embodiments, the first vibration isolation portion and the second vibration isolation portion are spaced apart by more than 1 mm;

[0021] Alternatively, the first vibration isolation part and the second vibration isolation part may come into contact with each other to form an integral structure.

[0022] In some embodiments, the orthographic projection of the first sub-part onto the back side of the display panel forms a first closed loop;

[0023] The second sub-part forms a second closed loop on the front projection of the back side of the display panel;

[0024] The second closed loop surrounds the periphery of the central region; the first closed loop surrounds the periphery of the second closed loop;

[0025] The second closed loop is fully aligned with the first closed loop;

[0026] Alternatively, the second closed loop may align with the first closed loop at localized locations around its perimeter, with the unaligned areas around the second closed loop forming a hollowed-out area.

[0027] In some embodiments, the vibration frequency of the display panel is greater than that of the display panel. The natural frequency of the second vibration isolation section is twice that of the second vibration isolation section.

[0028] In some embodiments, an acoustic cavity is also included, the acoustic cavity being located on the side of the frame opposite to the display panel, the acoustic cavity being connected to the second sub-part;

[0029] The acoustic cavity is closed and fastened to the back side of the display panel, and the orthographic projection of the acoustic cavity on the back side of the display panel covers the central area.

[0030] In some embodiments, the support structure is closedly fastened to the back side of the display panel;

[0031] The supporting structure is reused as an acoustic cavity.

[0032] In some embodiments, the support structure is connected to the second sub-part via a fourth vibration isolation portion;

[0033] The fourth vibration isolation section is located between the support structure and the second sub-section.

[0034] In some embodiments, the support structure is connected to the second sub-part via a fourth vibration isolation portion;

[0035] The fourth vibration isolation section is located between the support structure and the second sub-section.

[0036] In some embodiments, the support structure includes a main body and a connecting part, the main body being a strip-shaped structure, and the connecting part being connected to the second sub-part;

[0037] The width of the main body is smaller than the width of the central region in that width direction;

[0038] The support structure is located within the cavity formed by the acoustic cavity and the display panel being fastened together.

[0039] In some embodiments, the system further includes a housing located on the side of the frame opposite to the display panel, the housing being connected to the side of the first sub-part opposite to the display panel, and the housing being closedly fastened to the back of the display panel.

[0040] Both the acoustic cavity and the support structure are located within the cavity formed by the fastening of the housing and the display panel.

[0041] In some embodiments, the system further includes a housing located on the side of the frame opposite to the display panel, the housing being connected to the side of the first sub-part opposite to the display panel, and the housing being closedly fastened to the back of the display panel.

[0042] The support structure is located within the cavity formed by the fastening of the housing and the display panel.

[0043] This disclosure also provides a display module, which includes a plurality of the above-described splicing screen units, wherein the plurality of splicing screen units are spliced ​​together. Attached Figure Description

[0044] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0045] Figure 1 This is a schematic diagram of the structure of a flat panel loudspeaker with a conical diaphragm in the disclosed technology;

[0046] Figure 2 This is a schematic diagram of the structure of a flat panel speaker in the disclosed technology;

[0047] Figure 3 This is a schematic diagram of the structure of a splicing display device in the disclosed technology;

[0048] Figure 4 for Figure 3 Top view of the aluminum frame structure;

[0049] Figure 5 This is a cross-sectional view of the splicing screen unit in an embodiment of this disclosure;

[0050] Figure 6 This is a cross-sectional view of another splicing screen unit in an embodiment of this disclosure;

[0051] Figure 7 This is a top view schematic diagram of the splicing structure of the splicing screen unit in an embodiment of this disclosure;

[0052] Figure 8 For along Figure 7 Cross-sectional view of the spliced ​​structure along section AA;

[0053] Figure 9a This is a graph showing the relationship between the vibration transmissibility of the second boundary region of the display panel and the thickness of the second vibration isolation part.

[0054] Figure 9bA graph showing the relationship between the total vibration displacement of the first boundary region of the display panel and the presence or absence of a second vibration isolation part, as well as the different thicknesses of the second vibration isolation part;

[0055] Figure 9c This is a schematic diagram of the vibration state of the first boundary region with and without the first vibration isolation section.

[0056] Figure 9d The graph shows the total vibration displacement of the first boundary region as a function of the thickness of the first vibration isolation section.

[0057] Figure 10 This is a cross-sectional view of the structure of another splicing screen unit in this disclosure embodiment;

[0058] Figure 11 This is a cross-sectional view of the structure of another splicing screen unit in this disclosure embodiment;

[0059] Figure 12 This is a cross-sectional view of the structure of another splicing screen unit in this embodiment of the present disclosure;

[0060] Figure 13 This is a cross-sectional view of the structure of another splicing screen unit in this embodiment of the present disclosure;

[0061] Figure 14a This is a top view of the frame structure in an embodiment of this disclosure;

[0062] Figure 14b This is a schematic diagram of the frame and support structure in an embodiment of this disclosure;

[0063] Figure 15a This is a top view schematic diagram of another frame structure in an embodiment of this disclosure;

[0064] Figure 15b This is a schematic diagram of another frame and support structure in an embodiment of this disclosure;

[0065] Figure 16 This is a cross-sectional view of the structure of another splicing screen unit in this disclosure embodiment;

[0066] Figure 17 This is a cross-sectional view of the structure of another splicing screen unit in an embodiment of this disclosure.

[0067] The attached figures are labeled as follows:

[0068] 1. Display panel; 101. Central area; 102. Edge area; 2. Frame; 21. First sub-section; 22. Second sub-section; 3. Sound excitation unit; 4. First vibration isolation section; 5. Second vibration isolation section; 6. Cabinet; 7. Third vibration isolation section; 8. Acoustic cavity; 9. Support structure; 91. Main body; 92. Connecting section; 10. Fourth vibration isolation section; 11. Conical diaphragm; 12. Driver unit; 13. Splicing unit; 14. Foam adhesive; 15. Aluminum frame; 16. Iron nail; 17. Magnet. Detailed Implementation

[0069] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the following describes in further detail a splicing screen unit and a display module provided by the embodiments of this disclosure in conjunction with the accompanying drawings and specific implementation methods.

[0070] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0071] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0072] The sound-producing principle of a flat panel speaker is as follows: the driver is attached to a special flat panel and fixed in a specific position on the panel. When the driver is powered on, it causes the panel to vibrate in a wave-like manner, thus transmitting the sound. (See reference...) Figure 1 and Figure 2 The display screen sound generation technology is based on the principle of a flat panel speaker. It replaces the conical diaphragm 11 of a traditional flat panel speaker with a screen (i.e., the display panel 1 of the display device). The driver unit 12 drives the vibrating plate (i.e., the display panel 1) to vibrate and generate sound.

[0073] Reference Figure 3 and Figure 4 Traditional screen-based sound-emitting splicing display devices typically have a cabinet structure to achieve splicing between splicing units 13. In the display device, the edge area of ​​the display panel 1 is bonded to an aluminum frame 15 using foam adhesive 14. Iron nails 16 are mounted on the aluminum frame 15, and magnets 17 are mounted on the aluminum cabinet 6. The magnets 17 and iron nails 16 are attracted together by the magnetic force. To ensure the overall flatness of the spliced ​​display panel 1, the foam adhesive 14 is usually very thin. To achieve the sound-emitting function of the display panel, a sound-emitting excitation unit is attached to the back side of the display panel, driving the display panel to vibrate and radiate sound.

[0074] However, the vibration of the display panel is transmitted to the aluminum frame 15 and the cabinet 6 through the edge area, causing the cabinet 6 to vibrate and produce abnormal noise. On the other hand, when the display panel 1 vibrates and produces sound, the aluminum cabinet 6 becomes the back cavity of the sound-producing device. The display panel 1 will push the air in the back cavity to vibrate. Since the aluminum cabinet 6 has low damping, the aluminum back cavity is prone to distortion and sound coloration, affecting the sound quality and the audience's subjective experience. The conventional method to solve the above problems is to make the foam adhesive have a certain thickness to reduce the transmission of the display panel vibration to the aluminum frame and cabinet. Generally, the thicker the vibration isolation element such as foam adhesive, the better the vibration isolation effect; however, if the vibration isolation element is too thick, it will affect the overall flatness of the spliced ​​display panel. Therefore, this conventional method is not suitable for applications with high flatness requirements, such as splicing screens.

[0075] To address the issues of vibration transmission from the display panel to the aluminum frame and cabinet, resulting in abnormal noise, distortion, and sound coloration, this disclosure provides a splicing screen unit, referring to... Figures 5-8 The system includes a display panel 1, a frame 2, a sound-generating excitation unit 3, and a support structure 9. The frame 2, the sound-generating excitation unit 3, and the support structure 9 are located on the back side of the display panel 1. The support structure 9 is located on the side of the sound-generating excitation unit 3 opposite to the display panel 1 and is used to support the sound-generating excitation unit 3. The back side of the display panel 1 includes a central region 101 and an edge region 102. The sound-generating excitation unit 3 contacts the central region 101 of the display panel 1 and is used to excite the display panel 1 to vibrate and emit sound. The frame 2 is positioned on the front projection side of the back side of the display panel 1. The image is located at the edge region 102 of the display panel 1 and is used to support the display panel 1; wherein, the frame 2 includes a first sub-part 21 and a second sub-part 22, the orthographic projection of the second sub-part 22 on the back side of the display panel 1 is closer to the central region 101 of the display panel 1 than the orthographic projection of the first sub-part 21 on the back side of the display panel 1; a first vibration isolation part 4 is provided between the first sub-part 21 and the display panel 1; a second vibration isolation part 5 is provided between the second sub-part 22 and the display panel 1; the thickness of the first vibration isolation part 4 is less than the thickness of the second vibration isolation part 5.

[0076] The display panel 1 has a display side and a back side, with the back side referring to the side of the display panel 1 opposite to the display side. The thicknesses of the first vibration isolation portion 4 and the second vibration isolation portion 5 refer to their dimensions along the direction away from the display panel 1. The edge region 102 of the display panel 1 includes a first boundary region S1 and a second boundary region S2, with the second boundary region S2 and the first boundary region S1 successively moving away from the central region 101 of the display panel 1; the first sub-part 21 and the first vibration isolation portion 4 provide support for the first boundary region S1; the second sub-part 22 and the second vibration isolation portion 5 provide support for the second boundary region S2. The sound-generating excitation unit 3 includes a support frame, a driver unit, and a vibration unit; the driver unit uses a magnet; the vibration unit uses a voice coil; the voice coil is in contact with the central region 101 of the display panel 1; the magnet and the voice coil are connected by a wire; when the magnet is energized, it generates a magnetic field, which causes the voice coil to vibrate, and the vibration of the voice coil is transmitted to the display panel 1, thereby causing the display panel 1 to vibrate and emit sound.

[0077] In some embodiments, the thickness of the first vibration isolation portion 4 ranges from 0.2 to 2 mm; the thickness of the second vibration isolation portion 5 ranges from 2 to 10 mm. The surfaces of the first vibration isolation portion 4 and the second vibration isolation portion 5 that are in contact with the display panel 1 are flush.

[0078] In some embodiments, refer to Figure 6 The splicing screen unit also includes a housing 6, located on the side of the frame 2 opposite to the display panel 1. The housing 6 is connected to the side of the first sub-part 21 opposite to the display panel 1, and the housing 6 is closedly fastened to the back side of the display panel 1. The housing 6 is used to support the frame 2 and the display panel 1 to facilitate the splicing of multiple splicing screen units.

[0079] In some embodiments, the frame 2 and the housing 6 are made of aluminum. The aluminum frame 2 and housing 6 have both strength and light weight, which not only ensures the firm and stable splicing of the splicing screen units, but also ensures that the display module formed by splicing the splicing screen units is lighter.

[0080] In this embodiment, by dividing the frame 2 into a first sub-part 21 and a second sub-part 22, and setting a thicker second vibration isolation part 5 between the second sub-part 22 near the central region 101 of the display panel 1 and the display panel 1, the vibration of the central region 101 of the display panel 1 that is first transmitted to the second boundary region S2 can be absorbed (i.e., the standing wave principle), thereby reducing the transmission of the vibration of the display panel 1 to the frame 2; at the same time, the transmission of vibration from the second boundary region S2 to the first boundary region S1 is reduced or avoided, thereby confining the effective vibration radiation area of ​​the display panel 1 within the second boundary region S2, reducing or avoiding the transmission of vibration to the first sub-part 21 and the cabinet 6 connected to the first sub-part 21, and finally reducing or avoiding the possibility of the cabinet 6 vibrating, so as to reduce or avoid the abnormal noise generated by the vibration of the cabinet 6 and improve the screen sound effect of the splicing screen unit; in addition, the setting of the first vibration isolation part 4 can reduce the transmission of the vibration of the display panel 1 in this splicing screen unit to the adjacent splicing screen unit through the second boundary region S2 and the first boundary region S1, thereby improving the screen sound effect of the splicing screen unit splicing to form the screen.

[0081] In some embodiments, refer to Figure 5 The second sub-part 22 is formed by extending from the side of the first sub-part 21 near the central region 101 of the display panel 1 in the direction L1 towards the central region 101 of the display panel 1; the distance h2 between the side of the second sub-part 22 near the display panel 1 and the edge region 102 is greater than the distance h1 between the side of the first sub-part 21 near the display panel 1 and the edge region 102.

[0082] The second vibration isolation portion 5 fills the gap h2 between the side of the second sub-part 22 closest to the display panel 1 and the edge region 102; the first vibration isolation portion 4 fills the gap h1 between the side of the first sub-part 21 closest to the display panel 1 and the edge region 102. The second vibration isolation portion 5 can absorb the vibration of the second boundary region S2 of the display panel 1, which reduces the transmission of the vibration of the second boundary region S2 of the display panel 1 to the frame 2; see reference... Figure 9a The curve showing the relationship between the vibration transmissibility of the second boundary region S2 of the display panel 1 and the thickness of the second vibration isolation part 5 is shown. Figure 9a As can be seen, the vibration transmissibility of the second boundary region S2 of the display panel 1 is negatively correlated with the thickness of the second vibration isolation part 5; this also reduces the transmission of vibration from the second boundary region S2 of the display panel 1 to the first boundary region S1; refer to Figure 9b The curve shows the relationship between the total vibration displacement of the first boundary region S1 of the display panel 1 and the presence or absence of the second vibration isolation part 5 and the different thicknesses of the second vibration isolation part 5; from Figure 9bAs can be seen, the second vibration isolation part 5 can significantly reduce the vibration of the first boundary region S1, but the vibration isolation effect of the first vibration isolation part 4 does not change much with its thickness; the main function of the first vibration isolation part 4 in the first boundary region S1 is to suppress the transmission of vibration of the display panel 1 in this splicing screen unit to the display panels 1 in adjacent splicing screen units. (Refer to...) Figure 9c The vibration state of the first boundary region S1 is with or without the first vibration isolation part 4. Without the first vibration isolation part 4, the vibration of the first boundary region S1 is larger, and therefore the displacement transmitted to the adjacent display panel 1 is also larger. Figure 9d The curve showing the change in vibration transmissibility of the first boundary region S1 with the thickness of the first vibration isolation section 4 is shown below. Figure 9d As can be seen, the thinner the first vibration isolation section 4, the smaller the total vibration displacement of the first boundary region S1. (The above...) Figure 9a The vibration transmissibility is characterized by the displacement transmissibility of the vibration of the display panel 1. Therefore, by making the distance h2 between the second sub-part 22 and the display panel 1 greater than the distance h1 between the first sub-part 21 and the display panel 1, the maximum vibration reduction effect can be achieved.

[0083] In some embodiments, refer to Figure 5 The thickness of the second vibration isolation part 5 is less than the sum of the thicknesses of the first vibration isolation part 4 and the first sub-part 21. That is, the thickness of the second vibration isolation part 5 is exactly the sum of the thickness of the first vibration isolation part 4 and the difference between the spacing h2 and the spacing h1. The thicker the second vibration isolation part 5, the better its vibration absorption effect, that is, the better its vibration isolation effect. At the same time, since the flatness of the display panel 1 is still determined by the first vibration isolation part 4, the larger thickness of the second vibration isolation part 5 will not affect the overall flatness of the display panel 1 when splicing the splicing screen units. Therefore, the vibration isolation scheme in this embodiment is suitable for applications such as splicing screens that have high flatness requirements.

[0084] In some embodiments, refer to Figure 10 The second sub-part 22 is formed by extending from one side of the first sub-part 21 near the central region 101 of the display panel 1 in a direction L1 closer to the central region 101 of the display panel 1, then in a direction L2 away from the display panel 1, and then in a direction L1 closer to the central region 101 of the display panel 1. The distance h2 between the side of the second sub-part 22 near the display panel 1 and the edge region 102 is greater than the distance h1 between the side of the first sub-part 21 near the display panel 1 and the edge region 102.

[0085] In some embodiments, refer to Figure 10The thickness of the second vibration isolation part 5 is greater than the sum of the thicknesses of the first vibration isolation part 4 and the first sub-part 21. Specifically, the thickness of the second vibration isolation part 5 is the sum of the thickness of the first vibration isolation part 4, the thickness of the first sub-part 21, and the distance the first sub-part 21 extends in the direction L2 away from the display panel 1. This thickness setting of the second vibration isolation part 5 further enhances its vibration absorption effect, thereby further improving its vibration isolation performance, while not affecting the overall flatness of the display panel 1 when the splicing screen units are assembled.

[0086] In some embodiments, refer to Figure 11 The second sub-part 22 is formed by extending from the side of the first sub-part 21 away from the display panel 1 in a direction L2 away from the display panel 1 and then in a direction L1 closer to the central region 101 of the display panel 1; the distance h2 between the side of the second sub-part 22 closer to the display panel 1 and the edge region 102 is greater than the distance h1 between the side of the first sub-part 21 closer to the display panel 1 and the edge region 102.

[0087] In some embodiments, refer to Figure 11 The thickness of the second vibration isolation part 5 is greater than the sum of the thicknesses of the first vibration isolation part 4 and the first sub-part 21. Specifically, the thickness of the second vibration isolation part 5 is the sum of the thickness of the first vibration isolation part 4, the thickness of the first sub-part 21, and the distance the first sub-part 21 extends in the direction L2 away from the display panel 1. This thickness setting of the second vibration isolation part 5 further enhances its vibration absorption effect, thereby further improving its vibration isolation performance, while not affecting the overall flatness of the display panel 1 when the splicing screen units are assembled.

[0088] In some embodiments, the thickness of the second vibration isolation portion may also be equal to the sum of the thicknesses of the first vibration isolation portion and the first sub-portion.

[0089] In some embodiments, refer to Figure 5 , Figure 7 , Figure 10 and Figure 11 The first sub-part 21 extends outward to form the second sub-part 22. The thickness of the first sub-part 21 remains unchanged, and the housing 6 is connected to the first sub-part 21. Figure 5 , Figure 7 and Figure 10 The structural arrangement of the first sub-part 21 and the second sub-part 22 in the splicing screen unit will not increase the overall thickness of the splicing screen unit formed by the fastening of the display panel 1 and the cabinet 6.

[0090] In some embodiments, refer to Figure 12The second sub-part 22 is located on the side of the first sub-part 21 opposite to the display panel 1. The second sub-part 22 and the first sub-part 21 overlap in their orthographic projections on the back side of the display panel 1, and are connected to each other at the overlapping position. A third vibration isolation part 7 is also provided between the second sub-part 22 and the first sub-part 21. The third vibration isolation part 7 can further reduce or prevent the vibration of the display panel 1 from being transmitted to the first sub-part 21 and the cabinet 6 connected to the first sub-part 21, thereby further reducing or preventing the possibility of the cabinet 6 vibrating, and thus reducing or preventing the abnormal noise generated by the vibration of the cabinet 6.

[0091] In some embodiments, since the vibration in the central region has been greatly weakened or blocked after being transmitted successively through the second vibration isolation part 5 and the first vibration isolation part 4, the vibration transmitted to the third vibration isolation part 7 is much smaller than the vibration transmitted to the second vibration isolation part 5. Therefore, the thickness of the third vibration isolation part 7 is smaller than the thickness of the second vibration isolation part 5. In some embodiments, the thickness of the third vibration isolation part 7 may also be greater than or equal to the thickness of the second vibration isolation part 5. That is, the thickness of the third vibration isolation part 7 is specifically set based on the magnitude of the vibration it can block.

[0092] In some embodiments, refer to Figure 12 The thickness of the second vibration isolation part 5 is equal to the sum of the thicknesses of the first vibration isolation part 4, the first sub-part 21 and the third vibration isolation part 7.

[0093] In some embodiments, refer to Figure 5 , Figures 7-12 The first vibration isolation part 4 and the second vibration isolation part 5 are spaced at least 1 mm apart. The distance between the first vibration isolation part 4 and the second vibration isolation part 5 is the distance L1 along the edge region 102 away from the central region 101 on their closest sides. This effectively blocks the transmission of vibrations from the display panel 1, reducing or preventing vibration transmission to the first sub-part 21 and the housing 6. Furthermore, this distance allows for the placement of control wiring for the sound-emitting excitation unit 3, simplifying the manufacturing process of the splicing screen unit and improving the integration of the display module formed by splicing multiple splicing screen units.

[0094] In some embodiments, refer to Figure 13 The first vibration isolation part 4 and the second vibration isolation part 5 are in contact with each other to form an integral structure. With this arrangement, even when the second vibration isolation part 5 has a certain thickness, it can better block the transmission of vibration of the display panel 1 and reduce or avoid the transmission of vibration to the first sub-part 21 and the housing 6.

[0095] In some embodiments, refer to Figure 14a and Figure 14bThe first sub-part 21, projected onto the back side of the display panel 1, forms a first closed loop; the second sub-part 22, projected onto the back side of the display panel 1, forms a second closed loop; the second closed loop surrounds the periphery of the central area of ​​the display panel 1; the first closed loop surrounds the periphery of the second closed loop; the second closed loop and the first closed loop are completely aligned. That is, the first sub-part 21 and the second sub-part 22 are connected across the entire surface.

[0096] In some embodiments, refer to Figure 15a and Figure 15b The second closed loop is connected to the first closed loop at local positions around its perimeter, and the unconnected areas around the second closed loop and the first closed loop form a hollow area 200. That is, the first sub-part 21 and the second sub-part 22 are connected by beams (i.e., not a full-surface connection). Vibrations transmitted from the central area to the second sub-part 22 can only be transmitted through beams, further weakening or preventing vibrations transmitted from the second sub-part 22 to the first sub-part 21.

[0097] In some embodiments, the first vibration isolation part 4, the second vibration isolation part 5, and the third vibration isolation part 7 all employ vibration-damping double-sided adhesive; the vibration-damping double-sided adhesive includes foam or rubber. Foams include PU foam (insulating ester foam) or EVA foam (ethylene-vinyl acetate copolymer). The thicker the vibration-damping double-sided adhesive, the better its vibration isolation effect.

[0098] In some embodiments, the vibration frequency of the display panel 1 is greater than that of the display panel 1. The natural frequency of the second vibration isolation section 5 is twice that of the first sub-section 21. With this configuration, the vibration transmission rate from the display panel 1 to the second sub-section 22 is less than 1. Therefore, the second vibration isolation section 5 can effectively block the vibration of the display panel 1 from being transmitted to the second sub-section 22 and the first sub-section 21.

[0099] In some embodiments, refer to Figures 5-11 The splicing screen unit also includes an acoustic cavity 8, which is located on the side of the frame 2 away from the display panel 1. The acoustic cavity 8 is connected to the second sub-part 22. The acoustic cavity 8 is closed and fastened to the back side of the display panel 1. The orthographic projection of the acoustic cavity 8 on the back side of the display panel 1 covers the central area 101 of the display panel 1.

[0100] The acoustic cavity 8 is located within the cavity formed by the fastening of the cabinet 6 and the display panel 1. The central region 101 of the display panel 1 is the effective radiation area for vibration, and the length and width dimensions of the acoustic cavity 8 cover this effective radiation area. When the display panel 1 vibrates to produce sound, the vibration of the effective radiation area only drives the air inside the acoustic cavity 8 to vibrate, without affecting the air inside the cabinet 6, thus solving the sound coloration problem caused by the original cabinet 6. In addition, the sealed cavity formed between the acoustic cavity 8 and the display panel 1 can prevent low-frequency sound short circuits and improve low-frequency loudness; the specific principle is that the sound waves from the back side of the display panel 1 diffract to the front side. Since the sound waves from the front and back sides of the display panel 1 are out of phase, destructive interference occurs, thereby preventing low-frequency sound short circuits.

[0101] In some embodiments, the acoustic cavity 8 is made of wood or plexiglass.

[0102] In some embodiments, refer to Figures 5-12 As shown, the support structure 9 is connected to the second sub-section 22 via the fourth vibration isolation part 10; the fourth vibration isolation part 10 is located between the support structure 9 and the second sub-section 22.

[0103] The support structure 9 is connected to the second sub-section 22 with anti-loosening screws to fix the sound-generating excitation unit 3. This ensures that under the drive of electromagnetic force, only the voice coil drives the display panel 1 to vibrate, while the frame and magnet remain stationary, thus improving sound quality. The fourth vibration isolation part 10 reduces the transmission of vibration from the support structure 9 to the second sub-section 22. The fourth vibration isolation part 10 uses vibration-damping double-sided adhesive.

[0104] In some embodiments, refer to Figure 14b , Figures 5-12 The support structure 9 includes a main body 91 and a connecting part 92. The main body 91 is a strip structure, and the connecting part 92 is connected to the opposite sides of the second sub-part 22. The width of the main body 91 is smaller than the width of the central region 101 of the display panel 1 in the width direction. The support structure 9 is located in the cavity formed by the acoustic cavity 8 and the display panel 1.

[0105] In some embodiments, refer to Figure 14b , Figures 5-12 The acoustic cavity 8 and the support structure 9 are both located in the cavity formed by the fastening of the cabinet 6 and the display panel 1.

[0106] In some embodiments, refer to Figure 15b , Figure 16 and Figure 17 The support structure 9 is enclosedly fastened to the back of the display panel 1; the support structure 9 also functions as an acoustic cavity. That is, the support structure 9 can be made of wood or plexiglass. The enclosed support structure 9 eliminates the need for an acoustic cavity in the splicing screen unit, thus reducing the overall thickness of the splicing screen unit.

[0107] In some embodiments, refer to Figure 15b , Figure 16 and Figure 17 The support structure 9 is connected to the second sub-part 22 via the fourth vibration isolation part 10; the fourth vibration isolation part 10 is located between the support structure 9 and the second sub-part 22. The support structure 9 is located within the cavity formed by the fastening of the housing 6 and the display panel 1.

[0108] In some embodiments, the display panel 1 may be an LCD display panel, an OLED display panel, a Mini LED display panel, or a Micro LED display panel. Preferably, the display panel 1 is a Mini LED display panel or a Micro LED display panel, which can better realize the splicing of multiple splicing screen units to form a display module, and can also better realize the audio-visual integration of the display module.

[0109] The splicing screen unit provided in this embodiment divides the frame into a first sub-section and a second sub-section, and sets a thicker second vibration isolation section between the second sub-section near the central area and the display panel. This absorbs the vibration that is first transmitted to the second boundary area when the central area vibrates and produces sound (i.e., the standing wave principle), thereby reducing or preventing the vibration from being transmitted from the second boundary area to the first boundary area. This confines the effective vibration radiation area of ​​the display panel within the second boundary area, reduces or prevents the vibration from being transmitted to the first sub-section and the cabinet connected to the first sub-section, and ultimately reduces or prevents the possibility of the cabinet vibrating, thereby reducing or preventing the abnormal noise generated by the cabinet vibration and improving the screen sound effect of the splicing screen unit.

[0110] This disclosure also provides a display module, including multiple splicing screen units as described in the above embodiments, wherein the multiple splicing screen units are spliced ​​together.

[0111] By employing the splicing screen unit in the above embodiments, the screen sound effect of the display module is improved.

[0112] The display module can be any product or component with display function, such as LED panels, LED TVs, mobile phones, tablets, monitors, laptops, digital photo frames, and navigators.

[0113] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A video wall unit, comprising a display panel, a frame, a sound-emitting excitation unit, and a support structure; wherein the frame, the sound-emitting excitation unit, and the support structure are located on the back side of the display panel; The support structure is located on the side of the sound-generating excitation unit opposite to the display panel, and is used to support the sound-generating excitation unit; The back of the display panel includes a central area and an edge area; The sound-generating excitation unit is in contact with the central area and is used to excite the display panel to vibrate and emit sound; The orthographic projection of the frame on the back side of the display panel is located in the edge region, and is used to support the display panel; in, The frame includes a first sub-part and a second sub-part, wherein the orthographic projection of the second sub-part on the back side of the display panel is closer to the central region than the orthographic projection of the first sub-part on the back side of the display panel. A first vibration isolation portion is provided between the first sub-part and the display panel; a second vibration isolation portion is provided between the second sub-part and the display panel; the thickness of the first vibration isolation portion is less than the thickness of the second vibration isolation portion; The second sub-part is formed by extending from one side of the first sub-part near the central region in a direction closer to the central region, then in a direction away from the display panel, and then in a direction closer to the central region. The distance between the side of the second sub-part closest to the display panel and the edge region is greater than the distance between the side of the first sub-part closest to the display panel and the edge region. Alternatively, the second sub-part is formed by a portion of the first sub-part extending from one side away from the display panel, first away from the display panel, and then towards the central region; The distance between the side of the second sub-part closest to the display panel and the edge region is greater than the distance between the side of the first sub-part closest to the display panel and the edge region. Alternatively, the second sub-part is located on the side of the first sub-part away from the display panel, and the second sub-part overlaps with the orthographic projection of the first sub-part on the back side of the display panel, and the second sub-part and the first sub-part are connected to each other at the orthographic projection overlap position. A third vibration isolation section is also provided between the second sub-section and the first sub-section; The first vibration isolation part and the second vibration isolation part are spaced apart by more than 1 mm; The splicing screen unit also includes an acoustic cavity, which is located on the side of the frame opposite to the display panel and is connected to the second sub-part; the acoustic cavity is located on the side of the support structure opposite to the display panel. The acoustic cavity is closed and fastened to the back side of the display panel, and the orthographic projection of the acoustic cavity on the back side of the display panel covers the central area. The splicing screen unit also includes a housing located on the side of the frame away from the display panel. The housing is connected to the side of the first sub-part away from the display panel, and the housing is closedly fastened to the back side of the display panel. The acoustic cavity is located within the cavity formed by the fastening of the housing and the display panel; The central area of ​​the display panel is the effective radiation area for vibration, and the length and width of the acoustic cavity cover the effective radiation area for vibration.

2. The splicing screen unit according to claim 1, wherein, The thickness of the second vibration isolation part is equal to the sum of the thicknesses of the first vibration isolation part, the first sub-part, and the third vibration isolation part.

3. The splicing screen unit according to claim 1, wherein, The first sub-part forms a first closed loop by its orthographic projection onto the back side of the display panel; The second sub-part forms a second closed loop on the front projection of the back side of the display panel; The second closed loop surrounds the periphery of the central region; The first closed loop surrounds the outer perimeter of the second closed loop; The second closed loop is fully aligned with the first closed loop; Alternatively, the second closed loop may align with the first closed loop at localized locations around its perimeter, with the unaligned areas around the second closed loop forming a hollowed-out area.

4. The splicing screen unit according to claim 1, wherein, The vibration frequency of the display panel is greater than The natural frequency of the second vibration isolation section is twice that of the second vibration isolation section.

5. The splicing screen unit according to claim 1, wherein, The support structure is connected to the second sub-section via the fourth vibration isolation section; The fourth vibration isolation section is located between the support structure and the second sub-section.

6. The splicing screen unit according to claim 5, wherein, The supporting structure includes a main body and a connecting part. The main body is a strip-shaped structure, and the connecting part is connected to the second sub-part. The width of the main body is smaller than the width of the central region in that width direction; The support structure is located within the cavity formed by the acoustic cavity and the display panel being fastened together.

7. A display module, wherein, It includes multiple splicing screen units as described in any one of claims 1-6, and the multiple splicing screen units are spliced ​​together.

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