Passive 3D LED display module with sound-transmitting effect

Abstract

The present application relates to the technical field of LED display. Provided is a passive 3D LED display module with a sound-transmitting effect, comprising a support structure, an area matrix driving board, a mask layer, a polarizing layer and sound-transmitting channels, wherein the area matrix driving board is fixed to the support structure, and light-emitting diodes arranged in an array are provided on the side of the area matrix driving board away from the support structure; the mask layer is fixed on the side of the area matrix driving board away from the support structure; the polarizing layer is attached to the side of the mask layer away from the area matrix driving board; and the sound-transmitting channels sequentially pass through the support structure, the area matrix driving board, the mask layer and the polarizing layer. According to the technical solution provided in the embodiments of the present application, by means of the provision of the sound-transmitting channels that pass through the support structure, the area matrix driving board, the mask layer and the polarizing layer, a sound source perceived by a viewer comes from a display image. In this way, from the audiovisual perspective of the viewer, image and sound are in the same position, that is, the integration of image and sound positioning is achieved by means of the sound-transmitting channels, thereby improving the synchronization between sound and image, and thus improving the audiovisual effect of a playback device.

Description

Passive 3D LED display module with sound transmission effect

[0001] The present application claims priority to the Chinese patent application No. 202420918938.0, filed on April 29, 2024, and entitled "Passive 3D LED display module with sound transmission effect", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of LED display technology, and in particular to a passive 3D LED display module with sound transmission effect. BACKGROUND

[0003] 3D LED (light-emitting diode) display screens can give viewers a sense of being in the scene, and are particularly suitable for use in movie theaters, theme parks, science museums and other occasions. However, the playback equipment in the above-mentioned occasions not only requires the 3D LED display screen to provide high-definition realistic pictures, but also pays great attention to the sound effect of the loudspeaker equipment. Only when the sound positioning and the picture position are perfectly integrated in the direction can the playback equipment achieve the best visual and auditory effect.

[0004] Current 3D LED display screens do not have sound transmission function, and generally place loudspeaker equipment around the display screen to transmit sound, which is difficult to ensure that the picture position and the sound positioning are perfectly integrated in the direction, resulting in poor visual and auditory effect of the playback equipment. SUMMARY

[0005] The present application provides a passive 3D LED display module with sound transmission effect, so as to integrate the display picture position and the sound positioning of the playback equipment in the direction, and improve the visual and auditory effect of the playback equipment.

[0006] The present application provides a passive 3D LED display module with sound transmission effect, which comprises a support structure, a surface array driving board, a mask layer, a polarizing layer and a sound transmission channel.

[0007] The surface array driving board is fixed on the support structure, and the surface array driving board is provided with an array of light emitting tubes on the side away from the support structure. The mask layer is fixed on the side of the surface array driving board away from the support structure, and the polarizing layer is attached to the side of the mask layer away from the surface array driving board.

[0008] The sound transmission channel penetrates the support structure, the surface array driving board, the mask layer and the polarizing layer in sequence.

[0009] The technical scheme provided in the embodiments of the present application sets a sound transmission channel penetrating through the support structure, the surface array driving board, the mask layer and the polarizing layer, so that the sound source heard by the viewer is derived from the display picture. In this way, from the perspective of the viewer, the picture and the sound are at the same position, that is, the picture position and the sound position are fused in the direction by the sound transmission channel, the synchronization of the sound and the picture is improved, and thus the visual and auditory effect of the playing device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a schematic diagram of the overall structure of a passive 3D LED display module according to an embodiment of the present application;

[0011] Fig. 2 is a schematic diagram of the overall structure of a passive 3D LED display module according to an embodiment of the present application;

[0012] Fig. 3 is a schematic diagram of the distribution of light emitting tubes according to an embodiment of the present application;

[0013] Fig. 4 is a schematic diagram of the structure of a mask layer according to an embodiment of the present application;

[0014] Fig. 5 is a schematic diagram of the distribution of light emitting tubes according to an embodiment of the present application;

[0015] Fig. 6 is a schematic diagram of the distribution of light emitting tubes according to an embodiment of the present application;

[0016] Fig. 7 is a schematic diagram of the layout structure of the schematic diagram provided in Fig. 1;

[0017] Fig. 8 is a schematic diagram of the structure of a polarizing layer according to an embodiment of the present application;

[0018] Fig. 9 is a schematic diagram of the structure of a polarizing layer according to an embodiment of the present application;

[0019] Fig. 10 is a schematic diagram of the distribution structure of a first polarizing film and a second polarizing film according to an embodiment of the present application;

[0020] Fig. 11 is a schematic diagram of the distribution structure of a first light emitting tube and a second light emitting tube according to an embodiment of the present application;

[0021] Fig. 12 is a schematic diagram of the distribution structure of a first polarizing film and a second polarizing film according to an embodiment of the present application;

[0022] Fig. 13 is a schematic diagram of the distribution structure of a first light emitting tube and a second light emitting tube according to an embodiment of the present application;

[0023] Fig. 14 is a schematic diagram of the distribution structure of a first polarizing film and a second polarizing film according to an embodiment of the present application;

[0024] Fig. 15 is a schematic diagram of the distribution structure of a first light emitting tube and a second light emitting tube according to an embodiment of the present application.

[0025] Wherein, 1-emitting tube; 11-first emitting tube, 12-second emitting tube, 2-face array driving board; 21-second sound transmission channel, 3-supporting structure; 31-first sound transmission channel, 4-shielding layer; 41-third sound transmission channel, 42-through hole, 5-polarizing layer; 51-fourth sound transmission channel; 52-first polarizing film, 53-second polarizing film. DETAILED DESCRIPTION

[0026] The passive 3D LED display module with sound transmission effect provided by the embodiment of the application is shown in FIG. 1 and FIG. 2, and includes the supporting structure 3, the face array driving board 2, the shielding layer 4 and the polarizing layer 5 which are sequentially stacked.

[0027] The face array driving board 2 is fixed on the supporting structure 3, and the emitting tubes 1 arranged in an array are arranged on the side of the face array driving board 2 away from the supporting structure 3, as shown in FIG. 3. The shielding layer 4 is fixed on the side of the face array driving board 2 away from the supporting structure 3, and the polarizing layer 5 is attached to the side of the shielding layer 4 away from the face array driving board 2.

[0028] Wherein, the sound transmission channel penetrates the supporting structure 3, the face array driving board 2, the shielding layer 4 and the polarizing layer 5 in sequence, and it needs to be noted that the sound transmission channel includes a channel penetrating the supporting structure 3, the face array driving board 2, the shielding layer 4 and the polarizing layer 5. In some embodiments, a plurality of channels are uniformly distributed at positions without integrated circuits or without connectors. In this way, from the perspective of the viewer, the sound of the loudspeaker device and the display picture of the passive 3D LED display module are fused in the azimuth.

[0029] The technical scheme provided by the embodiment of the application makes the sound source heard by the viewer come from the display picture by setting the sound transmission channel penetrating the supporting structure 3, the face array driving board 2, the shielding layer 4 and the polarizing layer 5. In this way, from the perspective of the viewer, the picture and the sound are at the same position, that is, the picture position and the sound positioning are fused in the azimuth through the sound transmission channel, the synchronization of the sound and the picture is improved, and thus the visual and auditory effect of the playing device is improved.

[0030] In some embodiments, the loudspeaker device is arranged on one side of the supporting structure 3, and the sound emitting direction of the loudspeaker device faces the sound transmission channel. Of course, in the actual application process, the loudspeaker device is not limited to being fixedly arranged on the supporting structure 3, but can also be arranged on an independent structure to support the loudspeaker device, and the loudspeaker device and the supporting structure 3 are in a separated state.

[0031] Taking the front surface of the display interface of the passive 3D LED display module as an example, the loudspeaker device can be arranged on the back surface of the support structure 3, that is, on the back surface of the passive 3D LED display module. In this way, the sound emitted by the loudspeaker device is transmitted to the front surface of the 3D LED display module through the sound transmission channel, so that the sound of the loudspeaker device and the picture of the display interface are fused at the same position, thereby improving the visual and auditory effect of the playing device.

[0032] As shown in FIGS. 4 and 7, the mask layer 4 is provided with a through hole 42, and the light emitting tube 1 is arranged in the through hole 42. In some embodiments, as shown in FIG. 5, the thickness of the mask layer 4 is equal to the height of the light emitting tube 1, so that the end of the light emitting tube 1 is flush with one side surface of the mask layer 4. In this way, the mask layer 4 can avoid affecting the display content of the light emitting tube 1, especially when the display screen is viewed from the side. If the mask layer is higher than the light emitting tube, the problem of visual angle shielding may occur. As shown in FIG. 6, the mask layer 4 can support the polarizing layer 5. Since the end of the light emitting tube 1 is flush with one side surface of the mask layer 4, it can be ensured that the polarizing layer 5 is flatly attached. In addition, as shown in FIG. 6, in the case that the polarizing layer 5 is attached to the surface of the mask layer 4, the end of the light emitting tube 1 can be attached to the polarizing layer 5, thereby improving the display effect of the display module.

[0033] As shown in FIGS. 5 and 6, the inner hole size of the through hole 42 on the mask layer 4 is greater than the outer frame size of the light emitting tube 1, so as to avoid interference between the through hole 42 on the mask layer 4 and the light emitting tube 1 during installation of the mask layer 4.

[0034] In some embodiments, as shown in FIG. 1, the sound transmission channel includes a first sound transmission channel 31, a second sound transmission channel 21, a third sound transmission channel 41 and a fourth sound transmission channel 51 which are sequentially communicated. As shown in FIG. 1, the first sound transmission channel 31 is arranged on the support structure 3. As shown in FIG. 7, the second sound transmission channel 21 is arranged on the surface array driving board 2. As shown in FIG. 4, the third sound transmission channel 41 is arranged on the mask layer 4. As shown in FIGS. 8 and 9, the fourth sound transmission channel 51 is arranged on the polarizing layer 5.

[0035] In some embodiments, the projections of the first sound transmission channel 31, the second sound transmission channel 21, the third sound transmission channel 41 and the fourth sound transmission channel 51 overlap in the direction perpendicular to the plane on which the polarizing layer 5 is located.

[0036] In some embodiments, the polarizing layer 5 includes a first polarizing film 52 and a second polarizing film 53 arranged in an array, and both the first polarizing film 52 and the second polarizing film 53 cover the light emitting tube 1, and the polarization directions of the first polarizing film 52 and the second polarizing film 53 are different. In this way, the light emitting tube 1 covered by the first polarizing film 52 can be referred to as a first light emitting tube 11, and the light emitting tube covered by the second polarizing film 53 can be referred to as a second light emitting tube 12.

[0037] In some embodiments, the light emitting tube 1 can be a light emitting tube with a driver in a light driver integrated design. The thickness of the light emitting tube 1 is 0.5mm to 1mm, so that the mask layer 4 has a certain thickness to have the strength to support the polarizing layer 5.

[0038] In the embodiments of the present application, the first polarizing film 52 and the second polarizing film 53 have three arrangement modes, that is, the first light emitting tube 11 and the second light emitting tube 12 have three arrangement modes.

[0039] Based on the combination of the light emitting tube dot matrix driving mode, the first light emitting tube 11 and the second light emitting tube 12 have different arrangement modes. For example, the driving mode includes column driving and row driving, and different driving mode combinations have different row and column of the power supply line. In this case, the second sound transmission channel 21 arranged on the surface array driving plate 2 needs to avoid the lines in the surface array driving plate.

[0040] For example, as shown in FIG. 10, the first arrangement mode is that the first polarizing film 52 and the second polarizing film 53 are arranged alternately only in the first direction. For example, as shown in FIG. 12, the second arrangement mode is that the first polarizing film 52 and the second polarizing film 53 are arranged alternately only in the second direction. For example, as shown in FIG. 14, the third arrangement mode is that the first polarizing film 52 and the second polarizing film 53 are arranged alternately in the first direction and the second direction. The first direction and the second direction are perpendicular to each other, and in FIGS. 10, 12 and 14, the horizontal direction is the first direction and the vertical direction is the second direction.

[0041] In some embodiments, in the case of the first polarizing film 52 and the second polarizing film 53 arranged alternately only in the first direction, as shown in FIG. 11, in the first direction, the pitch between two adjacent light emitting tubes 1 is N / 2, the light emitting tube 1 covered by the first polarizing film 52 is referred to as the first light emitting tube 11, and the light emitting tube covered by the second polarizing film 53 is referred to as the second light emitting tube 12. That is, the pitch between the adjacent first light emitting tube 11 and the second light emitting tube 12 is N / 2, the pitch between two adjacent first light emitting tubes 11 is N, and the pitch between two adjacent second light emitting tubes 12 is N. In this case, in the first direction, two adjacent light emitting tubes 1 form a pixel group, the row driving of the light emitting tube 1 is in the first direction, and the second sound transmission channel 21 is arranged above or below the light emitting tube 1 in the second direction. In the second direction, the pitch between two adjacent light emitting tubes 1 is N, that is, the pitch between two adjacent first light emitting tubes 11 is N, and the pitch between two adjacent second light emitting tubes 12 is N.

[0042] It should be noted that in the case where the first polarizing film 52 and the second polarizing film 53 are alternately arranged only in the first direction, the interval of the first light emitting tube 11 and the second light emitting tube 12 is not limited to the above arrangement, and other arrangement modes can also be adopted. For example, in the first direction, the interval of two adjacent light emitting tubes 1 is N, and the light emitting tube 1 covered by the first polarizing film 52 is referred to as the first light emitting tube 11, and the light emitting tube covered by the second polarizing film 53 is referred to as the second light emitting tube 12. That is, the interval between adjacent first light emitting tube 11 and second light emitting tube 12 is N, the interval between two adjacent first light emitting tube 11 is M, and the interval between two adjacent second light emitting tube 12 is P. In this case, two adjacent light emitting tubes 1 in the first direction form a pixel group, and M is not equal to 2N.

[0043] In some embodiments, in the case where the first polarizing film 52 and the second polarizing film 53 are alternately arranged only in the second direction, as shown in FIG. 13, in the first direction, the interval of two adjacent light emitting tubes 1 is N, and the light emitting tube 1 covered by the first polarizing film 52 is referred to as the first light emitting tube 11, and the light emitting tube covered by the second polarizing film 53 is referred to as the second light emitting tube 12. That is, the interval between two adjacent first light emitting tube 11 is N, and the interval between two adjacent second light emitting tube 12 is N. In the second direction, the interval between adjacent first light emitting tube 11 and second light emitting tube 12 is N / 2, that is, the interval between adjacent first light emitting tube 11 and second light emitting tube 12 is N / 2, the interval between two adjacent first light emitting tube 11 is N, and the interval between two adjacent second light emitting tube 12 is N. In this case, two adjacent light emitting tubes 1 in the second direction form a pixel group, and in this case, the row drive of the light emitting tube 1 is in the second direction, and the second sound transmission channel 21 is arranged on the left or right side of the light emitting tube 1 in the second direction.

[0044] It should be noted that in the case where the first polarizing film 52 and the second polarizing film 53 are alternately arranged only in the second direction, the interval of the first light emitting tube 11 and the second light emitting tube 12 is not limited to the above arrangement, and other arrangement modes can also be adopted. For example, in the second direction, the interval of two adjacent light emitting tubes 1 is N, the interval of two adjacent first light emitting tube 11 is M, and the interval of two adjacent second light emitting tube 12 is P. In this case, two adjacent light emitting tubes 1 in the second direction form a pixel group, and M is not equal to 2N.

[0045] In some embodiments, as shown in FIG. 15, in the case where the first polarizing film 52 and the second polarizing film 53 are alternately arranged in the first direction and the second direction, that is, the second light emitting tube 12 is at the center position of four adjacent first light emitting tubes 11. In this case, two adjacent light emitting tubes 1 in the first direction can be arranged to form a pixel group. Two adjacent light emitting tubes 1 in the second direction can also be arranged to form a pixel group.

[0046] In the embodiments of the present application, the polarizing layer can be a composite polarizing film composed of left-handed polarizing film and right-handed polarizing film arranged alternately, or a composite polarizing film composed of 0° linear polarizing film and 90° linear polarizing film arranged alternately, i.e. the polarization directions of the first polarizing film 52 and the second polarizing film 53 are different. For example, the first polarizing film 52 is a left-handed polarizing film, and the second polarizing film 53 is a right-handed polarizing film. For another example, the first polarizing film 52 is a 0° linear polarizing film, and the second polarizing film 53 is a 90° linear polarizing film.

[0047] In some embodiments, the polarizing layer 5 is composed of a plurality of local structures, for example, a single local structure forms the polarizing layer 5 as shown in FIG. 9, or a plurality of local structures form the polarizing layer 5 as shown in FIG. 8.

[0048] In some embodiments, as shown in FIGS. 4, 7, 8, 9, 10 and 12, the sound transmission channel is a waist-shaped hole, i.e. the cross section of the sound transmission channel is a waist-shaped pattern with approximate elliptical shape. In this way, by setting the waist-shaped hole, the opening area of the sound transmission channel can be increased, so as to improve the sound transmission rate of the sound transmission channel and improve the sound transmission effect of the sound transmission channel. In addition, the waist-shaped hole is also beneficial for processing and molding, and the arc-shaped hole wall of the waist-shaped hole can reduce the stress concentration effect of the inner wall of the sound transmission channel.

[0049] In some embodiments, according to the structural features on the passive 3D LED display module, the sound transmission channel can be set as a hole with other shapes, for example, as shown in FIG. 14, or the sound transmission channel can be set as a circular hole.

Claims

1. A passive 3D LED display module with acoustic transparency effect, comprising: The support structure, the planar array driving board, the mask layer, the polarizing layer and the sound transmission channel are provided. The planar array driving board is fixed on the support structure, and an array of light emitting tubes is arranged on a side of the planar array driving board away from the support structure. The sound transmission channel penetrates the support structure, the planar array driving board, the mask layer and the polarizing layer in sequence.

2. The passive 3D LED display module with a sound transmission effect according to claim 1, wherein, A loudspeaker is arranged on a side of the support structure, and a sound emitting direction of the loudspeaker faces the sound transmission channel. 3.The passive 3D LED display module with sound transmission effect of claim 1, wherein, The mask layer is provided with a through hole, the light emitting tube is arranged in the through hole, and the thickness of the mask layer is equal to the height of light emission, so that the end of the light emitting tube is flush with a side surface of the mask layer.

4. The passive 3D LED display module with a sound transmission effect according to claim 3, wherein, The inner hole size of the through hole on the mask layer is greater than the outer frame size of the light emitting tube. 5.The passive 3D LED display module with sound transmission effect of claim 1, wherein, The sound transmission channel comprises a first sound transmission channel, a second sound transmission channel, a third sound transmission channel and a fourth sound transmission channel which are sequentially connected. The first sound transmission channel is arranged on the support structure, the second sound transmission channel is arranged on the planar array driving board, the third sound transmission channel is arranged on the mask layer, and the fourth sound transmission channel is arranged on the polarizing layer.

6. The passive 3D LED display module with acoustically transparent effect according to any one of claims 1-5, wherein, The sound transmission channel is a waist-shaped hole. 7.The passive 3D LED display module with sound transmission effect of claim 1, wherein, The polarizing layer comprises a first polarizing film and a second polarizing film arranged in an array, and the first polarizing film and the second polarizing film are covered by the light emitting tube.

8. The passive 3D LED display module with a sound transmission effect according to claim 7, wherein, The polarization directions of the first polarizing film and the second polarizing film are different.

9. The passive 3D LED display module with a sound transmission effect according to claim 8, wherein, The first polarizing film and the second polarizing film are alternately arranged in only a first direction or only a second direction, and the first direction and the second direction are perpendicular to each other. In the case that the first polarizing film and the second polarizing film are alternately arranged in only the first direction, the pitch of two adjacent light emitting tubes in the first direction is N / 2, and the pitch of two adjacent light emitting tubes in the second direction is N. 10.The passive 3D LED display module with sound transmission effect of claim 8, wherein, In the case that the first polarizing film and the second polarizing film are alternately arranged in only the second direction, the pitch of two adjacent light emitting tubes in the first direction is N, and the pitch of two adjacent light emitting tubes in the second direction is N / 2. In the case that the first polarizing film and the second polarizing film are alternately arranged in only the first direction, two adjacent light emitting tubes in the first direction form a pixel group. 11.The passive 3D LED display module with sound transmission effect of claim 7, wherein, In the case that the first polarizing film and the second polarizing film are alternately arranged in only the second direction, two adjacent light emitting tubes in the second direction form a pixel group.

12. Passive 3D LED display module with acoustically transparent effect according to any of the claims 7-11, wherein, The first polarizing film and the second polarizing film are alternately arranged in the first direction and the second direction, and the first direction and the second direction are perpendicular to each other.

13. Passive 3D LED display module with acoustically transparent effect according to any of claims 7-11, wherein, The first polarizing film is a left-handed polarizing film, and the second polarizing film is a right-handed polarizing film. The first polarizing film is a 0° linear polarizing film, and the second polarizing film is a 90° linear polarizing film.

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