111, the receiving card may be electrically connected to the power structure 114 through an additional wire.

The display module 120 includes: a second circuit board 122, at least one display panel 121, and a second driving structure 123 connected to each display panel 121. The display module 120 may include one display panel 121, or may include a plurality of display panels 121. The second circuit board 122 is provided thereon with a second connector 124 and at least one first wireless signal receiver 125 in one-to-one correspondence with the at least one display panel 121. The first wireless signal receiver 125 and the second connector 124 are both electrically connected to the second driving structure 123.

The first wireless signal receiver 125 is disposed opposite to the first wireless signal transmitter 113 in a one-to-one correspondence way. It should be noted that, “the first wireless signal receiver 125 is disposed opposite to the first wireless signal transmitter 113 in a one-to-one correspondence way” refers to that each first wireless signal receiver 125 corresponds to one first wireless signal transmitter 113 and a receiving end of the first wireless signal receiver 125 is opposite to a transmitting end of the first wireless signal transmitter 113 corresponding to the first wireless signal receiver 125, so that it is ensured that the first wireless signal receiver 125 can receive a wireless signal transmitted by the first wireless signal transmitter 113 corresponding thereto.

In some implementations, a distance between the first wireless signal transmitter 113 and the first wireless signal receiver 125 corresponding to the first wireless signal transmitter 113 may be less than 10 mm, so as to ensure a signal transmission effect between the first wireless signal transmitter 113 and the first wireless signal receiver 125.

The first connector 112 and the second connector 124 are arranged in a one-to-one correspondence way and are detachably connected. The term “detachably connected” here refers to that the first connector 112 and the second connector 124 are not fixedly connected, but can be separated, for example, detachable connection includes contact connection (that is, the first connector 112 and the second connector 124 can perform conduction of an electrical signal when being in contact), and may also include plug-in connection.

The power structure 114 is configured to output a power signal to the first connector 112 and the first driving structure 115, for example, the power structure 114 performs voltage conversion on an AC voltage received by the splicing display unit to obtain a DC voltage, so as to supply power to the first driving structure 115 and the second driving structure 123. The first driving structure 115 is configured to output, according to a to-be-displayed image of each display panel 121, a display driving signal to the first wireless signal transmitter 113 corresponding to the display panel 121, so as to allow the first wireless signal transmitter 113 to transmit the display driving signal to the first wireless signal receiver 125. For example, the first driving structure 115 performs processing processes, such as signal encoding and decoding, on received image information to obtain a control signal corresponding to the to-be-displayed image of each display panel 121, the control signal is a signal which controls the display panel 121 to perform display and can be transmitted wirelessly, for example, the control signal may include an RGB data signal, a clock signal, a latch signal, an enable signal, and a Serial Peripheral Interface (SPI) signal. The second driving structure 123 is configured to control the display panel 121 to perform display according to a power signal received by the second connector 124 and the display driving signal received by the first wireless signal receiver 125.

In the embodiment of the present disclosure, the splicing display unit includes the display module 120 and the signal source module 110, the display module 120 and the signal source module 110 are electrically connected through the first connector 112 and the second connector 124, and are wirelessly connected through the first wireless signal transmitter 113 and the first wireless signal receiver 125, and the signal source module 110 provides a power signal for the display module 120 through the first connector 112 and the second connector 124, and provides the display driving signal for the display module 120 through the first wireless signal transmitter 113 and the first wireless signal receiver 125. The first connector 112 and the second connector 124 are detachably connected, and the first wireless signal transmitter 113 and the first wireless signal receiver 125 are wirelessly connected, so that no wired connection structure such as a signal line or a circuit board needs to be disposed between the display module 120 and the signal source module 110, which facilitates installation and maintenance.

In some implementations, the display panel 121 includes a substrate 1211 and a plurality of pixel structures disposed on the substrate 1211, and each of the pixel structures may include a light emitting device 1212. Optionally, the substrate 1211 is a glass substrate 1211; the light emitting device 1212 may be a light-emitting diode (LED), such as a Mini-LED or a Micro-LED. A plurality of light emitting devices 1212 may emit light of a plurality of colors (e.g., red, blue and green). For example, the light emitting device 1212 may be soldered on the substrate 1211 by means of reflow soldering or eutectic soldering. A light-shielding layer BM may be further disposed between adjacent light emitting devices 1212. The display module 120 may drive the light emitting device 1212 to emit light by means of passive driving or active driving. When the light emitting device 1212 is driven to emit light by means of active driving, each pixel structure may further include a thin film transistor connected to the light emitting device 1212.

In some implementations, as shown in FIG. 3, the display module 120 further includes at least one flexible printed circuit (FPC) 126 connected to the display panel 121 in a one-to-one correspondence way. One end of the FPC 126 is electrically connected to the display panel 121, and the other end of the FPC 126 is electrically connected to the second circuit board 122. As shown in FIG. 4, the second driving structure 123 may include a driving circuit 123a disposed on the second circuit board 122, and the display panel 121 is electrically connected to the driving circuit 123a disposed on the second circuit board 122 through a corresponding FPC 126. The driving circuit 123a and the display panel 121 may be arranged in a one-to-one correspondence way, and driving circuits 123a corresponding to different display panels 121 may be disposed separately or may be integrated in a same chip.

It should be noted that the second driving structure 123 in the embodiment of the present disclosure is not limited to the above arrangement. FIG. 5 is another sectional view taken along the line A-A′ shown in FIG. 2, and FIG. 6 is a plan view of a first circuit board and a second circuit board shown in FIG. 5. As shown in FIG. 5 and FIG. 6, the second driving structure 123 includes a driver chip 123b provided on each FPC 126 which is electrically connected to the second circuit board 122. That is, the driver chip 123b is connected to the first wireless signal receiver 125 through the FPC 126 and a signal line disposed on the second circuit board 122, and is connected to the second connector 124 through the FPC 126 and a signal line disposed on the second circuit board 122, so as to receive the display driving signal and the power signal provided by the signal source module 110. In the embodiment of the present disclosure, the FPC 126 may be disposed on the backlight side of the display panel 121, and the FPC 126 and the second circuit board 122 may be connected through a connector 126a (e.g., a Zif connector or a B2B connector). Certainly, the FPC 126 and the second circuit board 122 may be connected by other means, which are not particularly limited herein.

In the embodiment of the present disclosure, a pad is provided on a side of the substrate 1211 away from the second circuit board 122, and electrical connection between the FPC 126 and the display panel 121 refers to that the FPC 126 is electrically connected to the pad of the substrate 1211, so as to provide a signal for a signal line on the substrate 1211 through the pad. The electrical connection between the FPC 126 and the pad of the substrate 1211 is not particularly limited in the embodiment of the present disclosure. For example, the FPC 126 may be connected to the pad through a connection line, so as to drive each light emitting device 1212 to emit light. It should be understood that a portion of the connection line may be located on a side surface of the substrate 1211. As another example, after connected to the pad of the substrate 1211, one end of the FPC 126 is led through a side surface of the substrate 1211 to a side of the substrate 1211 facing the second circuit board 122. As another example, the substrate 1211 is provided with a via, through which the FPC 126 is connected to the pad.

As shown in FIG. 3 and FIG. 5, in some implementations, the signal source module 110 further includes a first box 116, on which the first circuit board 111 is disposed. The display module 120 further includes a second box 127, the second circuit board 122 and the display panel 121 are both disposed on the second box 127, and the first box 116 is detachably connected to the second box 127. It should be noted that “detachably connected” refers to that the first box 116 is capable of being separated from the second box 127.

For example, the first box 116 and the second box 127 are connected by magnetic attraction. In some examples, as shown in FIG. 3 and FIG. 5, the first box 116 is provided with first magnetic members 118, the second box 127 is provided with second magnetic members 128, and the first magnetic members 118 and the second magnetic members 128 are connected by attraction in a one-to-one correspondence way. Each of the first magnetic members 118 and the second magnetic members 128 may be made of magnet, and two ends of the first magnetic member 118 and the second magnetic member 128 close to each other have opposite magnetic properties.

Certainly, it is possible that one of the first box 116 and the second box 127 is provided with magnetic members and the other one of the first box 116 and the second box 127 is provided with an iron sheet.

In some implementations, as shown in FIG. 3 and FIG. 5, the first box 116 includes: a bottom wall 1162, a side wall 1161 and a cover plate 1163, the cover plate 1163 is disposed opposite to the bottom wall 1162, and the bottom wall 1162 is located on a side of the cover plate 1163 away from the display module 120. The first circuit board 111 is disposed between the cover plate 1163 and the bottom wall 1162.

Optionally, the first circuit board 111 may be fixed on the bottom wall 1162 of the first box 116 through a first fastener 117. For example, the first fastener 117 is a screw, as shown in FIG. 4 and FIG. 6, a plurality of first screw holes V1 are provided in the first circuit board 111, and a plurality of first fasteners 117 pass through the first screw holes V1 in a one-to-one correspondence way to fix the first circuit board 111 on the bottom wall 1162 of the first box 116.

Optionally, the first magnetic members 118 are magnetic connectors which connect the cover plate 1163 to the side wall 1161, for example, the first magnetic members 118 are magnetic screws. In practical applications, the number of first magnetic members 118 may be set according to a size of the first box 116, so as to ensure stable connection between the cover plate 1163 and the side wall 1161.

As shown in FIG. 3 and FIG. 5, in some implementations, the second box 127 includes: a rear shell 1272 and a support frame 1271 connected to the rear shell 1272, the support frame 1271 is located between the rear shell 1272 and the display panel 121, the display panel 121 is fixed on a surface of the support frame 1271 away from the rear shell 1272, and the second circuit board 122 is disposed between the display panel 121 and the rear shell 1272. The support frame 1271 may be made of metal, for example, the support frame 1271 may be made of aluminum or an aluminum alloy.

As shown in FIG. 3 and FIG. 5, the display panel 121, the support frame 1271 and the second circuit board 122 define an accommodation space in which the FPC 126 is located.

Optionally, the cover plate 1163 of the first box 116 includes a first insulating part opposite to the first wireless signal transmitter 113, and the rear shell 1272 of the second box 127 includes a second insulating part opposite to the first wireless signal receiver 125, so that no metal structure exists between the first wireless signal transmitter 113 and the first wireless signal receiver 125, which can ensure the signal transmission effect between the first wireless signal transmitter 113 and the first wireless signal receiver 125.

For example, each of the cover plate 1163 and the rear shell 1272 may be made of an insulating material, which may include Polycarbonate (PC); or, the first insulating part is a first through hole disposed in the cover plate 1163, with the other parts of the cover plate 1163 made of metal; the second insulating part is a second through hole provided in the rear shell 1272, with the other parts of the rear shell 1272 made of metal. Certainly, the first insulating part may also be an insulating material filled in the first through hole, and the second insulating part may also be an insulating material filled in the second through hole.

An orthographic projection of the first wireless signal transmitter 113 on the cover plate 1163 may be located in a region where the first insulating part is located, and an orthographic projection of the first wireless signal receiver 125 on the rear shell 1272 may be located in a region where the second insulating part is located, so as to further ensure the signal transmission effect between the first wireless signal transmitter 113 and the first wireless signal receiver 125.

In order to facilitate connection between the first connector 112 and the second connector 124, a first opening exposing the first connector 112 is provided in the cover plate 1163. FIG. 7 is a sectional view of the second box shown in FIG. 3 and the second box shown in FIG. 5 along the line A-A′ shown in FIG. 2. As shown in FIG. 7, a second opening Vb exposing the second connector 124 is provided in the rear shell 1272.

Optionally, an adhesive layer BL is disposed on a surface of the support frame 1271 away from the rear shell 1272, and the display panel 121 is connected to the support frame 1271 through the adhesive layer BL. For example, the adhesive layer BL is an opaque adhesive layer, so as to prevent external light from entering a space between the display panel 121 and the rear shell 1272 to affect display. In a specific example, the adhesive layer BL adopts a black double-sided tape.

It should be noted that the display panel 121 may be connected to the support frame 1271 by other means, which are not particularly limited herein. For example, the display panel 121 is connected to the support frame 1271 with a fastener such as a screw.

FIG. 8 is a plan view of the support frame shown in FIG. 7. As described above, the display module 120 may include a plurality of display panels 121. In such case, in order to ensure stability of connection between the display panels 121 and the support frame 1271, as shown in FIG. 3, FIG. 5, FIG. 7 and FIG. 8, the support frame 1271 includes: a side frame 1271a and a partition wall 1271b connected to the side frame 1271a, the partition wall 1271b divides a region surrounded by the side frame 1271a into a plurality of partitions SA, the display panels 121 are disposed in one-to-one correspondence with the partitions SA, and the second circuit board 122 is disposed between the partition wall 1271b and the bottom wall 1162.

FIG. 9 is a schematic diagram of another splicing display unit according to an embodiment of the present disclosure, the splicing display unit shown in FIG. 9 differs from the splicing display unit shown in FIG. 3 in that the splicing display unit shown in FIG. 9 includes only one display panel 121. It should be noted that the support frame 1271 may also include the side frame 1271a and the partition wall 1271b in the case where the display module 120 includes one display panel 121, so that the stability of the connection between the display panel 121 and the support frame 1271 may be improved; certainly, it is possible that only the side frame 1271a is provided and the partition wall 1271b is omitted, so that only edges of the display panel 121 are fixed on the side frame 1271a.

In some implementations, as shown in FIG. 7, the support frame 1271 and the rear shell 1272 are two independent structures that are connected through a connector. In order to simplify an overall structure of the display module 120, the first magnetic members 118 may be configured as magnetic connectors which connect the support frame 1271 to the rear shell 1272, for example, the first magnetic members 118 are magnetic screws.

For example, as shown in FIG. 7, the rear shell 1272 includes: a bottom plate part 1272b, and a side plate part 1272a connected to the bottom plate part 1272b, a bottom of the side plate part 1272a is connected to the bottom plate part 1272b, and a top of the side plate part 1272a is connected to the support frame 1271. For example, a part of the side frame 1271a is connected to the side plate part 1272a, and the other part of the side frame 1271a is connected to the second circuit board 122. As shown in FIG. 3, FIG. 5 and FIG. 7, the second circuit board 122 may be fixed on the support frame 1271 through second fasteners 129. For example, the second fasteners 129 are screws, as shown in FIG. 4 and FIG. 6, a plurality of second screw holes V2 are provided in the second circuit board 122, and a plurality of second fasteners 129 pass through the second screw holes V2 in a one-to-one correspondence way to fix the second circuit board 122 on the support frame 1271.

FIG. 10 is a schematic diagram of another splicing display unit according to an embodiment of the present disclosure, the splicing display unit shown in FIG. 10 differs from the splicing display unit shown in FIG. 3 only in a structure of the second box, and FIG. 11 is a schematic diagram of the second box shown in FIG. 10. As shown in FIG. 10 and FIG. 11, the support frame 1271 and the rear shell 1272 may be formed into a one-piece structure, for example, the support frame 1271 and the rear shell 1272 are fixedly connected together by welding or other means, or the support frame 1271 and the rear shell 1272 are formed by integrated molding. It should be noted that, when the support frame 1271 and the rear shell 1272 are of a one-piece structure, the side frame 1271a of the support frame 1271 may be fixed with the rear shell 1272, and the partition wall 1271b of the support frame 1271 and the rear shell 1272 are separated from each other by a certain distance, so as to facilitate arrangement of the second circuit board 122. In addition, when the support frame 1271 and the rear shell 1272 are of a one-piece structure, the second through hole may be formed in the rear shell 1272 and used as the second insulating part, or an insulating material may be filled in the second through hole and used as the second insulating part.

In such case, as shown in FIG. 10, the second circuit board 122 may be fixed on the rear shell 1272 with the second fasteners 129. In addition, the second magnetic members 128 are also disposed on the rear shell 1272. The second magnetic members 128 may be magnetic screws. Unlike the second magnetic member 128 shown in FIG. 3, the second magnetic members 128 shown in FIG. 10 are disposed on the rear shell 1272, and there is no need to connect the support frame 1271 to the rear shell 1272.

In some implementations, edges of the display panel 121 do not extend beyond edges of the second box 127, that is, an orthographic projection of the edges of the display panel 121 on a reference plane, which is a plane where the second box 127 is located, does not extend beyond that of outer edges of the second box 127 on the reference plane. In this way, the substrate 1211 of the display panel 121 may be prevented from being damaged by external impact and a signal line on a side surface of the substrate 1211 may be prevented from being broken by impact, thereby ensuring quality of the splicing display unit.

In some implementations, the display panels 121 in the display module 120 are arranged in m rows and n columns, a sum of dimensions of each row of display panels 121 in a row direction is Ll (for example, if a dimension of each of n display panels 121 in each row is L11, L1=n*L11), and a sum of dimensions of each column of display panels 121 in a column direction is W1 (for example, if a dimension of each of m display panels 121 in each column is W11, W1=m*W11). A dimension of the second box 127 in the row direction is L2, and a dimension of the second box 127 in the column direction is W2. Illustratively, an orthographic projection of each display panel 121 on the second box 127 is rectangular, and accordingly, the display panel 121 has a length, a width and a thickness, and the row direction may be a length direction of the display panel 121 and the column direction may be a width direction of the display panel 121. It should be noted that m and n are both positive integers, and the display module 120 includes one display panel 121 when both m and n are 1.

In a manufacturing process of the splicing display unit, a deviation may exist between an actual dimension of the second box 127 and a target dimension of the second box 127, and the deviation, i.e., a dimensional tolerance of the second box 127, is denoted by a; in addition, the substrate 1211 of the display panel 121 is ground to make the substrate 1211 of the display panel 121 have a theoretical dimension, but a deviation may exist between an actual dimension of the ground substrate 1211 and the theoretical dimension of the ground substrate 1211 due to limitation of grinding accuracy, and the deviation, i.e., a grinding tolerance of the substrate 1211, is denoted by b. In addition, in a process of assembling the display panel 121 and the second box 127, a deviation may exist between an actual region where the display panel 121 is actually located on the second box 127 and a target region where the display panel 121 should be located on the second box 127 due to limitation of assembling accuracy, and the deviation is used for representing assembling accuracy of the display panel 121 and the second box 127 and is denoted by c. In view of those limitations caused by accuracy of production processes, in order to ensure that the edges of the display panel 121 do not extend beyond the edges of the second box 127, a difference between L2 and L1 satisfies: L2−L1≥n(a+b+c), and a difference between W2 and W1 satisfies: W2−W1≥m(a+b+c) in the embodiment of the present disclosure.

In addition, a plurality of splicing display units need to be spliced together in a splicing display device. In such case, if the difference between L2 and L1 is too large, or the difference between W2 and W1 is too large, a relatively obvious gap is generated between adjacent splicing display units and a relatively obvious gap is generated between adjacent display panels 121 in a same splicing display unit, which affects viewing experience. In order to avoid generation of the gaps, the difference between L2 and L1 further satisfies: m d≥L2−L1, and the difference between W2 and W1 satisfies: n d≥W2−W1 in the embodiment of the present disclosure, where d is 3% of center-to-center spacing of two adjacent light emitting devices 1212.

In addition, a third circuit board 201 and a fourth circuit board 202 may be further disposed on the first box 116 of the splicing display unit 100 in the embodiment of the present disclosure, which will be described in detail below and thus is not described here.

FIG. 12 is a schematic diagram of a splicing display device according to an embodiment of the present disclosure. As shown in FIG. 12, a splicing display device includes a plurality of splicing display units 100, and each of the splicing display units 100 is the splicing display unit 100 described in any one of the above embodiments. For example, the plurality of splicing display units 100 may be spliced together and arranged in multiple rows and multiple columns.

Two adjacent splicing display units 100 may be connected through a connecting member, which may be connected to the first boxes of the splicing display units 100. In this way, when the display module of a certain splicing display unit 100 needs to be maintained, the display module can be directly taken off, without affecting display of the other display modules. A specific structure and a specific type of the connecting member are not particularly limited in the embodiment of the present disclosure as long as the two adjacent splicing display units 100 can be stably connected together. It should be noted that the two adjacent splicing display units 100 may refer to two adjacent splicing display units 100 in a same row or two adjacent splicing display units 100 in a same column in the case where the splicing display units 100 are arranged in multiple rows and multiple columns.

FIG. 13A is a schematic diagram illustrating connection of signal source modules of two adjacent splicing display units according to an embodiment of the present disclosure, and FIG. 13B is a schematic diagram illustrating signal transmission between two adjacent splicing display units according to an embodiment of the present disclosure. As shown in FIG. 13A, in some implementations, the splicing display device further includes: a first transmission assembly connected between first circuit boards 111 of every two adjacent splicing display units, and the first transmission assembly includes: a third circuit board 201 and a fourth circuit board 202. As shown in FIG. 13A and FIG. 13B, the third circuit board 201 is provided with a third connector 201a and a second wireless signal transmitter 201b. The fourth circuit board 202 is provided with a fourth connector 202a and a second wireless signal receiver 202b. The second wireless signal transmitter 201a and the second wireless signal receiver 202b are respectively connected to first driving structures 115 of the two adjacent splicing display units 100, and the third connector 201a and the fourth connector 202a are respectively connected to power structures 114 of the two adjacent splicing display units. The third connector 201a and the fourth connector 202a are arranged in a one-to-one correspondence way and are detachably connected. The second wireless signal transmitter 201b and the second wireless signal receiver 202b are arranged opposite to each other in a one-to-one correspondence way, so as to transmit and receive a wireless signal.

For example, the splicing display device may further include a system input structure (not shown) configured to receive an external AC voltage signal and video stream data and provide an AC voltage signal for each splicing display unit 100; and the system input structure is further configured to provide image information for each splicing display unit 100 according to a position of the splicing display unit 100. Through the arrangement of first transmission assemblies, first driving structures 115 of the plurality of splicing display units 100 are cascaded, and power structures 114 of the plurality of splicing display units 100 are also cascaded, so that the power structure 114 of each splicing display unit 100 may receive the AC voltage signal, and the first driving structure 115 of each splicing display unit 100 may receive the image information. In a same splicing display unit 100, the first driving structure 115 outputs, according to a to-be-displayed image of each display panel 121, a display driving signal to the first wireless signal transmitter 113 corresponding to the display panel 121, so as to allow the first wireless signal transmitter 113 to transmit the display driving signal to the first wireless signal receiver 125. The second driving structure 123 controls the display panel 121 to perform display according to the power signal received by the second connector 124 and the display driving signal received by the first wireless signal receiver 125.

For two adjacent splicing display units 100, cascading between the first driving structures 115 thereof may be realized by wireless connection through the second wireless signal transmitter 201b and the second wireless signal receiver 202b. In addition, a second transmission assembly may be further disposed between two adjacent splicing display units 100, and includes a third wireless signal receiver 201c disposed on the third circuit board 201 and a third wireless signal transmitter 201d disposed on the fourth circuit board 202, and the third wireless signal receiver 201c and the third wireless signal transmitter 202c can receive and transmit a wireless signal therebetween. A same splicing display unit 100 may be provided with both the second wireless signal transmitter 201b and the third wireless signal receiver 201c. In this way, when the splicing display device includes a relatively large number of splicing display units 100 (e.g., six splicing display units), two adjacent splicing display units 100 may be cascaded using the second wireless signal transmitter 201b and the second wireless signal receiver 202b in one scenario, so as to allow a wireless signal to be transmitted among the plurality of splicing display units 100 in a first order (for example, the wireless signal is transmitted from a first splicing display unit 100 to a sixth splicing display unit 100); and in another scenario where the second wireless signal transmitter 201b or the second wireless signal receiver 202b is damaged, two adjacent splicing display units 100 may be cascaded using the third wireless signal transmitter 202c and the third wireless signal receiver 201c, so as to allow a wireless signal to be transmitted among the plurality of splicing display units 100 in a second order (for example, the wireless signal is transmitted from the sixth splicing display unit 100 to the first splicing display unit 100).

It should be noted that, when the second wireless signal transmitter and the second wireless signal receiver are both disposed inside the first box 116, a through hole may be provided in a corresponding position of the second box for avoiding an influence on wireless signal transmission. In addition, in order to ensure a transmission effect of a wireless signal, a distance between the second wireless signal transmitter and the second wireless signal receiver may be less than 10 mm.

An embodiment of the present disclosure further provide a manufacturing method of the above splicing display device, and FIG. 14 is a flowchart illustrating the manufacturing method of the splicing display device according to the embodiment of the present disclosure. As shown in FIG. 14, the manufacturing method includes steps S1 to S3.

In the step S1, a plurality of signal source modules and a plurality of display modules are manufactured. Each of the signal source modules includes a first circuit board provided with a power structure, a first driving structure, a first connector and a first wireless signal transmitter, and the first connector is electrically connected to the power structure; and each of the display modules includes: a second circuit board, at least one display panel, and at least one second driving structure in one-to-one correspondence with the display panel, and the second circuit board is provided with a second connector, and at least one first wireless signal receiver in one-to-one correspondence with the display panel, and both the first wireless signal receiver and the second connector are electrically connected to the second driving structure.

In the step S2, the plurality of signal source modules are spliced and fixed. For example, each of the signal source modules further includes the first box described above, the plurality of signal source modules may be disposed on a support table, and first boxes of the plurality of signal source modules may be spliced together.

In S3, the plurality of display modules are connected to the plurality of signal source modules in a one-to-one correspondence way, first wireless signal receivers of the display modules and first wireless signal transmitters of the signal source modules are arranged opposite to each other in a one-to-one correspondence way, and first connectors and second connectors are detachably connected; power structures are configured to output power signals to first connectors; first driving structures are configured to provide display driving signals to the first wireless signal transmitters corresponding to display panels according to to-be-displayed images of the display panels; and second driving structures are configured to control the display panels to perform display according to power signals and display driving signals corresponding to the display panels.