Backlight module, method for replacing light-emitting component in backlight module, and display device

Abstract

The present invention relates to a backlight module, a method for replacing light-emitting components in a backlight module, and a display device. The backlight module includes a back panel and a substrate arranged on the back panel; a plurality of light-emitting components are arranged on the substrate, and a walkway is also provided; each light-emitting component includes a base and a light-emitting part arranged on the base; the walkway connects the bases of the plurality of light-emitting components on the substrate, and the base of each light-emitting component can move along the walkway; the walkway has at least one end extending to the edge of the substrate; an entrance and exit are provided on the back panel, and the entrance and exit correspond to the position of the end of the walkway at the edge of the substrate, and the entrance and exit can accommodate the passage of the light-emitting components. For the above-mentioned backlight module, when some light-emitting components on the backlight module have insufficient luminous brightness, these light-emitting components can be controlled to be moved out of the backlight module for replacement, thereby ensuring the overall luminous effect of the backlight module.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a backlight module, a method for replacing a light-emitting component in the backlight module, and a display device. Background Art

[0002] Mini LED display technology is increasingly being used in the display industry. Mini LED panels are embedded with numerous LEDs, and during use, one or more of these components can often become damaged, impacting the overall display image quality. The current standard solution to this problem is to replace the panel (old panels are often discarded due to poor performance) or purchase new ones, which results in material waste.

[0003] To address this issue, a Chinese invention patent with publication number CN 110444487A, titled “A Method for Repairing Mini LED Modules,” discloses a solution, as shown in the attached figure. Figure 1 As shown, it mainly uses a translation motor to drive the push pin to separate the bad Mini LED chip from the PCB board, then uses the crystal suction device to suck up the bad Mini LED chip, and finally uses the crystal suction equipment to move the new Mini LED chip to the solder pad.

[0004] The above technical solution also has the following technical problems in practice: the process of replacing the LED chip is relatively tedious, the operation is complicated, the cost is high, and it is difficult to be widely used. Summary of the Invention

[0005] The present invention provides a backlight module, a method for replacing a light-emitting component in a backlight module, and a display device to solve the technical problems in the above-mentioned prior art of high difficulty, complex operation, and high cost in replacing a light-emitting component when the light-emitting brightness of the light-emitting component is insufficient, resulting in poor display.

[0006] The backlight module provided by the present invention comprises a back plate and a substrate arranged on the back plate;

[0007] The substrate is provided with a plurality of light-emitting components and a walkway; each light-emitting component includes a base and a light-emitting element provided on the base; the walkway connects the bases of the plurality of light-emitting components on the substrate, and the base of each light-emitting component can move along the walkway; the walkway has at least one end extending to the edge of the substrate;

[0008] The back plate is provided with an entrance and exit, the entrance and exit correspond to the position of the end of the walkway at the edge of the substrate, and the entrance and exit can accommodate the passage of the light-emitting component.

[0009] The walkway includes a plurality of first walkways, each of the first walkways extends along a first direction, and the plurality of first walkways are arranged at intervals in a direction perpendicular to the first direction, and the base of each of the light-emitting components is connected and arranged on the first walkway; or

[0010] The walkways include a plurality of first walkways and a plurality of second walkways, each of the first walkways extends along a first direction, connecting the bases of a row / column of light-emitting components in series; each of the second walkways extends along a second direction, the second direction intersecting the first direction, and each of the second walkways is arranged between two columns / rows of light-emitting components; or

[0011] The walkway includes a first walkway extending along a first direction and a second walkway extending along a second direction, the first direction and the second direction intersect, and the base of each of the light-emitting components is arranged on the first walkway and the second walkway.

[0012] The substrate has an electrical trough arranged along the walkway, and the base of the light-emitting component is provided with a roller terminal electrically connected to the light-emitting component, and the roller terminal remains connected to the electrical trough when the base moves along the walkway.

[0013] Each of the light-emitting components includes a driving mechanism and a walking mechanism. The walking mechanism is arranged on the base. The driving mechanism is connected to the walking mechanism and is used to drive the walking mechanism to move along the walkway.

[0014] Wherein, a rack is provided on the walkway, the walking mechanism includes a gear meshing with the rack, and the driving mechanism includes a stepping motor, which is connected to the gear so that the gear meshes with the rack and moves along the rack.

[0015] Among them, racks are respectively provided at the bottom, left side and right side of the walkway; the walking mechanism includes a plurality of gears, and the plurality of gears are respectively engaged with the racks located at the bottom, left side and right side of the walkway.

[0016] A first rack is provided at the bottom of the first walkway, and a second rack is provided at the bottom of the second walkway; a turntable is provided at the intersection of the first rack and the second rack, and a tooth structure is provided on the turntable, and the turntable can be rotated to a first state and a second state; in the first state, the tooth structure on the turntable is parallel to the tooth structure on the first rack, and in the second state, the tooth structure on the turntable is parallel to the tooth structure on the second rack;

[0017] Each of the light-emitting components includes a driving mechanism and a traveling mechanism. The traveling mechanism is a gear that can engage with the first rack and the second rack. The driving mechanism is connected to the traveling mechanism and is used to drive the gear to move along the first aisle or the second aisle.

[0018] Each of the light-emitting components includes a radio frequency tag, and a radio frequency tag is provided at the position where each of the light-emitting components is located on the substrate.

[0019] The present invention provides a method for replacing a light-emitting component in a backlight module, which comprises the following steps:

[0020] Step S1, detecting the luminance of each light-emitting component in the backlight module;

[0021] Step S2, obtaining the position of the light-emitting component whose luminous brightness is lower than the set value, and determining that the light-emitting component at the position needs to be replaced;

[0022] Step S3, controlling the light-emitting component to be replaced to move along the aisle, and removing the backlight module from the end of the aisle through the entrance and exit of the back panel;

[0023] Step S4, placing a new light-emitting component into the end of the aisle from the entrance of the back panel, and controlling the new light-emitting component to move along the aisle;

[0024] Step S5: Control the new light-emitting component to move to the target position according to the position tag on the new light-emitting component and the position tag of the target position.

[0025] The display device provided by the present invention includes a display panel and the above-mentioned backlight module.

[0026] The backlight module, the method for replacing the light-emitting component in the backlight module, and the display device provided by the present invention have the following advantages over the prior art:

[0027] In the backlight module, the light-emitting components in each light-emitting component are installed on a base, and the base can be moved along the walkway set on the substrate. Based on the above structure, the light-emitting components can be installed and replaced by controlling the base of each light-emitting component to move along the walkway. Specifically, when multiple light-emitting components are installed and fixed on the substrate, the multiple light-emitting components can be placed on the walkway first, and then the multiple light-emitting components can be controlled separately to move to the corresponding target positions along the walkway; and when some light-emitting components on the backlight module are damaged or cannot work normally, resulting in insufficient brightness, thereby affecting the overall lighting effect of the backlight module, these light-emitting components with insufficient brightness can be controlled to move out of the backlight module along the walkway, and then replaced with new light-emitting components and moved to the target position for replacement, thereby ensuring the overall lighting effect of the backlight module, and the replacement process is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is a schematic structural diagram of a substrate in a backlight module according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic structural diagram of a substrate in a backlight module according to another embodiment of the present invention;

[0032] Figure 3 This is a schematic structural diagram of a substrate in a backlight module according to another embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the structure of the back plate of the backlight module in an embodiment of the present invention;

[0034] Figure 5 This is a schematic structural diagram of a backlight module in a side view according to an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the structure of a single light-emitting component (when fixed on a substrate) in a backlight module according to an embodiment of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of a single walkway on the base plate;

[0037] Figure 8 A schematic diagram of the structure of multiple side-by-side walkways on a base plate;

[0038] Figure 9 This is a schematic structural diagram of a backlight module in a side view according to an embodiment of the present invention;

[0039] Figure 10 It is a structural diagram of the walkway and the rack provided on the walkway;

[0040] Figure 11 It is a structural schematic diagram of the intersection of the first aisle and the second aisle;

[0041] Figure 12 It is a structural schematic diagram of a single light-emitting component;

[0042] Figure 13 for Figure 12 A magnified schematic diagram of part A in the middle;

[0043] Figure 14 It is a structural schematic diagram of the portion of the light-emitting component that meshes with the rack;

[0044] Figure 15 This is a schematic diagram of the structure of the turntable at the intersection of the first rack and the second rack.

[0045] In the picture:

[0046] 10-base plate; 101-battery tank; 102-drum terminal; 110-RFID tag; 12-aisle; 121-first aisle; 122-second aisle; 123-rack; 124-turntable;

[0047] 20-light-emitting component; 21-base; 22-light-emitting element; 23-travel mechanism; 231-gear; 24-RFID tag; 25-brightness sensor;

[0048] 30-back panel; 301-entrance and exit; 302-gate. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0050] The following describes embodiments of a backlight module, a method for replacing a light-emitting component in a backlight module, and a display device provided by the present invention in conjunction with the accompanying drawings.

[0051] In one embodiment of the backlight module of the present invention, see Figures 1 to 15 The backlight module includes a back panel 30 and a substrate 10 arranged on the back panel 30. A plurality of light-emitting components 20 are arranged on the substrate 10, and a walkway 12 is also provided. Each light-emitting component 20 includes a base 21 and a light-emitting part 22 arranged on the base 21. The walkway 12 connects the bases 21 of the plurality of light-emitting components 20 on the substrate 10, and the base 21 of each light-emitting component 20 can move along the walkway 12. The walkway 12 has at least one end extending to the edge of the substrate 10. An entrance and exit 301 is provided on the back panel 30, and the entrance and exit 301 corresponds to the position of the end of the walkway 12 at the edge of the substrate 10, and the entrance and exit 301 can accommodate the passage of the light-emitting component 20; a gate 302 can be provided at each entrance and exit 301, and the gate 302 is used to open or close the entrance and exit 301. The entrance and exit 301 on the back plate 30 can be specifically provided on one side edge of the back plate 30, or entrances and exits 301 can be provided on multiple side edges of the back plate 30, for example, Figure 4 In the embodiment, entrances and exits 301 are provided on the four side edges of the back plate 30 .

[0052] In this embodiment, a plurality of light-emitting assemblies 20 are disposed on a substrate 10. Based on this structure, the backlight module function can be realized by controlling the light-emitting state of the light-emitting elements 22 within each light-emitting assembly 20. For example, the light-emitting elements 22 within the plurality of light-emitting assemblies 20 can be controlled to turn them on or off, and the brightness of the light-emitting elements 22 when they are turned on and in the light-emitting state can be controlled. This backlight module can be used as a backlight source for a liquid crystal display panel.

[0053] Secondly, the light-emitting element 22 in each light-emitting assembly 20 is mounted on a base 21, and the base 21 can move along the walkway 12 provided on the substrate 10. Based on the above structure, the light-emitting assembly 20 can be moved by controlling the base 21 of each light-emitting assembly 20 to move along the walkway 12. In this way, for the backlight module, when multiple light-emitting assemblies 20 are installed and fixed on the substrate 10, the multiple light-emitting assemblies 20 can be placed on the walkway 12 first, and then the multiple light-emitting assemblies 20 can be controlled to move to the target position along the walkway 12 and fixed. If some light-emitting assemblies 20 on the backlight module are damaged or malfunction, resulting in insufficient light brightness, thereby affecting the overall light-emitting effect of the backlight module, these light-emitting assemblies 20 with insufficient light brightness can be controlled to be moved out along the walkway 12 and replaced, thereby ensuring the overall light-emitting effect of the backlight module.

[0054] In this embodiment, the light emitting element 22 may be an LED (light emitting diode), or may be another type of light emitting device other than an LED. When an LED is selected as the light emitting element 22, the size of the LED used as the light emitting element 22 may be as small as possible, and specifically, a Mini LED or Micro LED may be selected to achieve better lighting effects or be used for more applications.

[0055] Compared with the backlight module using LED in the prior art, when some LED devices in the backlight module of this embodiment are damaged and cannot work normally, resulting in insufficient luminous brightness, the LED device serving as the light-emitting component 22 is controlled to move, removed from it and replaced, thereby ensuring that all LED devices on the backlight module can work normally and achieving an overall good luminous effect.

[0056] In one embodiment of the backlight module, Figure 1As shown, the walkway 12 includes a plurality of first walkways 121, each of which extends along a first direction. The plurality of first walkways 121 are spaced apart and arranged in a direction perpendicular to the first direction. The base 21 of each light-emitting assembly 20 is connected to each first walkway 121. For example, the substrate 10 may be provided with M×N light-emitting assemblies 20, which are arranged in an array, showing M rows in the horizontal direction and N columns in the vertical direction. The first direction may be the vertical direction, and each first walkway 121 extends in the longitudinal direction (shown as a vertical direction in the drawings). Each first walkway 121 connects the M light-emitting assemblies 20 in a column. The number of first walkways 121 is N. The N first walkways 121 respectively connect the light-emitting assemblies 20 in N columns.

[0057] In this embodiment, M light-emitting assemblies 20 arranged in a row and distributed longitudinally are connected to a common first aisle 121, and are only connected to this first aisle 121. They are not connected to other first aisles 121 or other light-emitting assemblies 20 connected to these first aisles 121. In this structure, when any light-emitting assembly 20 is moved in or out, it can only be moved through the first aisle 121 to which it is connected.

[0058] In this embodiment, the relative positional relationship between each light-emitting assembly 20 on the first aisle 121 and the light-emitting assemblies 20 on either side of it is fixed, and no light-emitting assembly 20 can jump over its adjacent light-emitting assembly 20 and move to another position. When a light-emitting assembly 20 connected to a first aisle 121 has insufficient light-emitting brightness, it is impossible to remove the light-emitting assembly 20 from the backlight module by simply moving the light-emitting assembly 20 itself. In fact, in addition to moving the light-emitting assembly 20, the light-emitting assemblies 20 on either side of the light-emitting assembly 20 must also be moved. Only by removing and reinstalling the light-emitting assemblies 20 (light-emitting assemblies 20 with normal light-emitting brightness do not need to be replaced and can be reinstalled) can the light-emitting assemblies 20 connected to the first aisle 121 all emit normal light.

[0059] According to the above analysis, it can be seen that there are still some inconveniences in the above embodiment. If the brightness of the light emitting components 20 is insufficient, it is usually necessary to move a large number of light emitting components 20 (exceeding the number of light emitting components 20 with insufficient brightness). In order to solve the above problem, in another embodiment of the backlight module, as shown in FIG. Figure 2 and Figure 9As shown, the walkway 12 includes multiple first walkways 121 and multiple second walkways 122, each first walkway 121 extends along a first direction, connecting the bases 21 of a row / column of light-emitting components 20 in series; each second walkway 122 extends along a second direction, the second direction intersects with the first direction, and each second walkway 122 is arranged between two columns / rows of light-emitting components.

[0060] In this embodiment, if any light-emitting component 20 has insufficient brightness, the light-emitting component 20 can enter the second aisle 122 via the first walkway 121 and continue to move along the second aisle 122 until it enters the entrance 301 at the end of the second aisle 122 at the edge of the substrate 10, and finally moves out of the backlight module. Thereafter, when replacing a new light-emitting component 20, it is also placed on the second aisle 122 at the entrance 301 and can be moved back to the position originally occupied by the removed light-emitting component 20 via the second aisle 122. In this process, only the light-emitting component 20 having insufficient brightness needs to be moved, and no additional light-emitting components 20 need to be moved, making the overall replacement process simpler and more convenient.

[0061] In one embodiment of the backlight module, Figure 3 As shown, the walkway 12 may include a first walkway 121 extending along a first direction and a second walkway 122 extending along a second direction, the first direction and the second direction intersecting each other, and the base 21 of each light emitting assembly 20 is disposed on the first walkway 121 and the second walkway 122. In actual implementation, the first direction and the second direction may be selected to have a perpendicular relationship. For example, M×N light-emitting components 20 can be provided on the substrate 10, and the M×N light-emitting components 20 are arranged in an array, which is represented by M rows along the horizontal direction and N columns along the vertical direction; the first direction can be the vertical direction, and the second direction can be the horizontal direction. Each first aisle 121 extends along the vertical direction (represented as the vertical direction shown in the accompanying drawings), and each first aisle 121 connects the M light-emitting components 20 located in a column. The number of first aisles 121 is N, and the N first aisles 121 respectively connect the light-emitting components 20 in N columns. At the same time, each second aisle 122 extends along the horizontal direction (represented as the horizontal direction shown in the accompanying drawings), and each second aisle 122 connects the N light-emitting components 20 located in a row. The number of second aisles 122 is M, and the M second aisles 122 respectively connect the light-emitting components 20 in M ​​rows.

[0062] In this embodiment, multiple light-emitting components 20 are actually connected into a grid structure by the first aisle 121 and the second aisle 122. Each light-emitting component 20 is connected by the first aisle 121 and the second aisle 122 at the same time. Each light-emitting component 20 can move along the first aisle 121 and the second aisle 122.

[0063] In this embodiment, when the luminous brightness of a certain light-emitting component 20 located in the middle of a row or a column is insufficient, when replacing the light-emitting component 20, the light-emitting component 20, together with other light-emitting components 20 located on one side of the light-emitting component 20 on the first aisle 121 or the second aisle 122, can be moved to the corresponding position and a new light-emitting component 20 or a new light-emitting part 22 can be taken out and reinstalled as in the scheme in the aforementioned embodiment (the light-emitting component 20 with normal luminous brightness can be reused, and actually only the light-emitting component 20 or light-emitting part 22 with insufficient luminous brightness needs to be replaced), thereby completing the replacement of the light-emitting component 20. For example, when the luminous brightness of the light-emitting components 20 in the 3rd row and the 5th column is insufficient, the 1st to 5th light-emitting components 20 in the 3rd row can be moved out to the corresponding positions, taken out and reinstalled, or the 5th to the last light-emitting components 20 in the 3rd row can be moved out to the corresponding positions, taken out and reinstalled, via the second aisle 122 connected to the light-emitting components 20 in the 3rd row; or the 1st to 3rd light-emitting components 20 in the 5th column can be moved out to the corresponding positions, taken out and reinstalled, or the 3rd to the last light-emitting components 20 in the 5th column can be moved out to the corresponding positions, taken out and reinstalled, via the first aisle 121 connected to the light-emitting components 20 in the 5th column.

[0064] However, in this embodiment, when the luminous brightness of a light-emitting component 20 located in the middle of a row or a column is insufficient, the replacement of the light-emitting component 20 does not necessarily depend on moving other light-emitting components 20 located on one side of the light-emitting component 20 along the first aisle 121 or the second aisle 122 to the corresponding position, taking them out and reinstalling them. In practice, for example, when the brightness of the light-emitting component 20 in the 3rd row and 5th column is insufficient, the light-emitting components 20 in the 1st row and 5th column and the 2nd row and 5th column can be controlled to move a certain distance to either side along the second aisle 122 connected to each of them, and separate from the first aisle 121 connecting the light-emitting components 20 in the 5th column and make way for a passage at the first aisle 121. In this way, the light-emitting component 20 in the 3rd row and 5th column can be moved along the first aisle 121 toward the 2nd row and the 1st row, and moved to the corresponding position and taken out. After that, a new light-emitting component 20 or a new light-emitting component 22 can be replaced and reinstalled. The reinstalled light-emitting component 20 is moved along the first aisle 121 to the position of the 3rd row and 5th column and fixed. Finally, the light-emitting components 20 in the 1st row and 5th column and the 2nd row and 5th column are moved back along the corresponding second aisle 122 to the initial position and fixed. It can be seen that when replacing the light emitting assembly 20 with insufficient luminance, although other light emitting assemblies 20 need to be moved together, it is not necessary to move these other light emitting assemblies 20 to the corresponding position, remove them and reinstall them.

[0065] In one embodiment of the backlight module, in each light-emitting assembly 20, the light-emitting element 22 and the base 21 are connected by a mortise and tenon joint. In this embodiment, the mortise and tenon joint between the light-emitting element 22 and the base 21 achieves high connection reliability and stability. However, the light-emitting element 22 and the base 21 may also be fixed by other connection methods, such as screwing, riveting, clamping, or bonding.

[0066] In one embodiment of the backlight module, the substrate 10 has an electrical slot 101 arranged along the aisle. The base 21 of the light-emitting assembly 20 is provided with a roller terminal 102 electrically connected to the light-emitting element 22. The roller terminal 102 remains connected to the electrical slot 101 as the base 21 moves along the aisle 12. This arrangement allows the light-emitting assembly 20 to continuously receive an electrical signal from the substrate 10 as it moves along the aisle 12. This electrical signal can be fed into a position tag (such as an RFID) within the light-emitting assembly 20 to obtain its position information, which will be described in detail later. Furthermore, the electrical connection maintained by the roller terminal 102 can also power a stepper motor and other components within the light-emitting assembly 20.

[0067] In one embodiment of the backlight module, the light emitting element 22 can be a Mini LED or Micro LED. As mentioned above, when Mini LED or Micro LED is selected as the light emitting element 22, the backlight module is used as the backlight source in the liquid crystal display panel, which helps the liquid crystal display panel achieve better display effects.

[0068] In an embodiment of the backlight module, each light emitting assembly 20 further includes a driving mechanism and a traveling mechanism 23 . The traveling mechanism 23 is disposed on the base 21 . The driving mechanism is connected to the traveling mechanism 23 to drive the traveling mechanism 23 to move along the walkway 12 .

[0069] In this embodiment, under the action of the driving mechanism, the walking mechanism 23 can drive the base 21 to move, so that the light-emitting component 20 can move arbitrarily along the aisle 12 to move out of the backlight module and move into the corresponding target position in the backlight module.

[0070] In a further embodiment, Figure 8 and Figure 10 、 Figure 11 As shown, a rack 123 is provided on the walkway 12; the walking mechanism 23 includes a gear 231 meshing with the rack 123, as shown in FIG. Figures 11-14 The driving mechanism includes a stepping motor, which is connected to the gear 231 so that the gear 231 meshes with the rack 123 and moves along the rack 123.

[0071] In this embodiment, a rack 123 is provided on the aisle 12, which can interact with the gear 231 to increase the reliability and stability of the light-emitting component 20 when moving in the aisle 12, and is not affected by the placement posture of the backlight module. For example, even when the backlight module is placed in a vertical state or an inclined posture, under the action of tooth meshing, the gear 231 can still drive the light-emitting component 20 to move stably along the aisle 12.

[0072] Specifically, racks 123 are provided at the bottom, left side, and right side of the walkway 12. The walking mechanism 23 includes a plurality of gears 231, which mesh with the racks 123 located at the bottom, left side, and right side of the walkway 12. The racks 123 are arranged in this manner so that they can not only mesh with the gears 231, enabling the gears 231 to better drive the light-emitting components 20 along the walkway 12, but the racks 123 located on the left and right sides of the walkway 12 can also guide and laterally support the gears 231, helping the gears 231 and the light-emitting components 20 maintain a corresponding posture (for example, with the light-emitting components 22 facing the light-emitting surface of the backlight module) without shifting or tipping over.

[0073] In one embodiment of the backlight module, the travel mechanism 23 includes a rotating wheel connected to a drive mechanism. Under the action of the drive mechanism, the rotating wheel is driven to rotate, thereby driving the entire light-emitting assembly 20 to move along the aisle 12, thereby moving out of the backlight module or into a corresponding target position on the backlight module. In this embodiment, only the drive mechanism and rotating wheel provided on the light-emitting assembly 20 are required to achieve movement of the light-emitting assembly 20 along the aisle 12. Compared to the aforementioned embodiments, there is no need to provide a rack 123 or other structure on the aisle 12.

[0074] In one embodiment of the backlight module, a first rack is provided at the bottom of the first aisle 121, and a second rack is provided at the bottom of the second aisle 122; a turntable 124 is provided at the intersection of the first rack and the second rack. Figure 15 As shown, the turntable 124 is provided with a gear structure and can rotate between a first state and a second state. In the first state, the gear structure on the turntable 124 is parallel to the gear structure on the first rack, and in the second state, the gear structure on the turntable 124 is parallel to the gear structure on the second rack. Each light-emitting assembly includes a drive mechanism and a travel mechanism. The travel mechanism is a gear 231 that can mesh with the first and second racks. The drive mechanism is connected to the travel mechanism to drive the gear to move along the first aisle 121 or the second aisle 122.

[0075] This embodiment is based on the aforementioned embodiment with the first aisle 121 and the second aisle 122 (eg Figure 2 and Figure 3As shown), in this embodiment, the movement of the light-emitting component 20 along the first aisle 121 can be achieved by the engagement of the gear 231 provided thereon with the first rack. When moving to the intersection of the first rack and the second rack, the turntable 124 needs to be rotated to the first state. At this time, the tooth structure on the turntable 124 is parallel to the tooth structure on the first rack, and the gear 231 can also engage with the tooth structure on the turntable 124. Through this engagement, the light-emitting component can be driven to cross the intersection of the first rack and the second rack and continue to move along the first aisle 121. When the light-emitting assembly 20 needs to move from the first aisle 121 to the second aisle 122, first, similar to the above process, the light-emitting assembly 20 is moved to the intersection of the first rack and the second rack, and its gear 231 is engaged with the tooth structure on the turntable 124. Then, the turntable is rotated to control the turntable 124 to the second state. At this time, the tooth structure on the turntable 124 is parallel to the tooth structure on the second rack. When the driving mechanism in the light-emitting assembly 20 acts on the gear 231, the gear 231 can engage with the tooth structure of the second rack, and then it can move along the second aisle 122.

[0076] Furthermore, racks 123 are provided on the left and right sides of the first and second walkways 121, 122, respectively; the travel mechanism also includes gears 231 that mesh with the racks 123 provided on the left and right sides of the first and second walkways. This arrangement is similar to the previous embodiment. The racks 123 provided on the left and right sides of the first and second walkways 121, 122, and the gears 231 on the light-emitting assembly 20 that mesh with the racks 123, acting as the travel mechanism, can, through their meshing relationship, both drive the movement of the light-emitting assembly 20 and provide support and guidance for the movement of the light-emitting assembly 20.

[0077] In addition to the above embodiments, each light-emitting component 20 may not be provided with the above-mentioned driving mechanism and walking mechanism 23, that is, each light-emitting component 20 may not have the function of moving along the aisle 12 by itself. In this case, the movement of multiple light-emitting components 20 along the aisle 12 can be achieved in the following way: a corresponding conveying mechanism, such as a conveyor belt, is arranged on the aisle 12. The conveying mechanism can move each light-emitting component 20 (each light-emitting component 20 is built into the conveying mechanism in the aisle 12) on the aisle 12 and move it to the corresponding target position, or move the light-emitting component 20 out of the backlight module from the corresponding position (such as the above-mentioned entrance and exit 301).

[0078] In one embodiment of the backlight module, the backlight module may further include a locking mechanism, which is arranged on the base 21 of each light-emitting component 20 and / or at a fixed position of the light-emitting component 20 on the substrate 10, and is used to keep the light-emitting component 20 fixed on the substrate 10.

[0079] In this embodiment, the locking mechanism may be, for example, a telescopic member disposed on the base 21. When extended, the telescopic member can engage with a wall panel on the substrate 10, thereby securing the light-emitting assembly 20 to the substrate 10. Alternatively, the telescopic member may be disposed on a wall panel of the substrate 10. When extended, the telescopic member can engage with the base 21, also securing the light-emitting assembly 20 to the substrate 10. When the telescopic member is retracted, the locking mechanism is unlocked, and the light-emitting assembly 20 can freely move along the walkway 12.

[0080] In addition to the telescopic parts listed above, the locking mechanism can also be expressed as any other structural form, as long as it can establish a locking and unlocking relationship between the light-emitting assembly 20 and the substrate 10.

[0081] The locking mechanism in the above embodiment locks or unlocks the light-emitting assembly 20 at the corresponding position of the substrate 10. In other embodiments, a locking mechanism can also be provided for the traveling mechanism. The locking mechanism can lock the traveling mechanism to limit the movement of the traveling mechanism, thereby ensuring that the light-emitting assembly 20 is in a fixed state. The locking mechanism can be specifically provided on the traveling mechanism, or on the substrate 10. Taking the traveling mechanism of the above-mentioned rotating wheel structure as an example, its locking mechanism can specifically be a braking structure such as a brake member, which can limit the movement of the rotating wheel by increasing the friction force; or the locking mechanism can be a retractable U-shaped lock, which locks the rotating wheel when the U-shaped lock is extended.

[0082] In one embodiment of the backlight module, each light emitting component 20 includes a radio frequency tag 24 (RFID), and each light emitting component 20 is provided with a radio frequency tag 110 (RFID) at a fixed position on the substrate 10 .

[0083] In this embodiment, by providing the RFID tag 24 and the RFID tag 110 , the position of the light emitting assembly 20 in the aisle 12 can be sensed and detected, and it can be sensed whether the light emitting assembly 20 has accurately moved to the corresponding fixed position on the substrate 10 .

[0084] Specifically, RFID tag 24 and RFID tag 110 can be active RFID tags. That is, when powered, RFID tag 24 and RFID tag 110 can communicate via RFID signals for sensing and position detection, but do not communicate via RFID signals when powered off. The active RFID tag on light-emitting assembly 20 can receive electrical signals from substrate 10 via the electrical connection between electrical slot 101 and drum terminal 102.

[0085] In this embodiment, some RFID tags 24 and RFID tags 110 can be selectively activated to transmit RFID signals, while other RFID tags 24 and RFID tags 110 are inactivated to not transmit RFID signals. For example, if the brightness sensor 25 (specifically, the brightness sensor 25 can be located on the light-emitting assembly 20 and adjacent to the light-emitting element 22) detects that a particular light-emitting assembly 20 is emitting insufficient brightness, while the other light-emitting assemblies 20 are emitting normally, power can be supplied only to the RFID tags 24 and RFID tags 110 located at the light-emitting assembly 20 experiencing insufficient brightness. Furthermore, when one or more light-emitting assemblies 20 are installed on the substrate 10, power can be supplied only to the RFID tags 110 located at the corresponding positions, as well as to the RFID tags 24 located on the installed light-emitting assemblies 20, while power is not supplied to the other RFID tags 24 and RFID tags 110. Powering mobile electrical components is a well-known technique in the art, and therefore, the specific details of powering the RFID tags 24 and the light-emitting element 22 in the light-emitting assembly 20 will not be further elaborated in this embodiment.

[0086] In this embodiment, the RFID tags 24 and RFID tags 110 can also be used to detect each light-emitting component 20. For example, power can be supplied individually to one or more RFID tags 110 and the light-emitting components 20 located at those locations. The brightness of the light-emitting components 20 can then be detected using a brightness sensor 25 or the like. If the brightness of the light-emitting components 20 is normal or insufficient, it can be accurately determined whether the light-emitting components 20 at that location are functioning normally or abnormally and require replacement. Similarly, the number and location of light-emitting components 20 on the backlight module experiencing insufficient brightness can be accurately detected. This allows targeted replacement of the light-emitting components 20 at those locations based on this location information.

[0087] In summary, the backlight module provided by the above embodiment of the present invention has a light-emitting component 22 in each light-emitting assembly 20 mounted on a base 21, and the base 21 can be moved along the walkway 12 provided on the substrate 10. Based on the above structure, the light-emitting assembly 20 can be installed and replaced by controlling the base 21 of each light-emitting assembly 20 to move along the walkway 12. Specifically, when multiple light-emitting assemblies 20 are mounted and fixed on the substrate 10, the multiple light-emitting assemblies 20 can first be placed on the walkway 12, and then the multiple light-emitting assemblies 20 can be controlled to move to corresponding target positions along the walkway 12 respectively. If some light-emitting assemblies 20 on the backlight module have insufficient luminous brightness, thereby affecting the overall luminous effect of the backlight module, these light-emitting assemblies 20 with insufficient luminous brightness can be controlled to move out of the backlight module along the walkway 12, and then new light-emitting assemblies 20 can be replaced by moving to the target position, thereby ensuring the overall luminous effect of the backlight module, and the replacement process is simple and convenient.

[0088] In an embodiment of the method for replacing a light-emitting component in a backlight module of the present invention, the method for replacing a light-emitting component in a backlight module includes the following steps S1 to S5.

[0089] Step S1 , detecting the light emitting brightness of each light emitting component in the backlight module.

[0090] In step S1, the process of detecting the brightness of the light emitting component 20 and determining whether the brightness of the light emitting component 20 is lower than the set value according to the detection data can be as follows:

[0091] The brightness of the light-emitting component 20 is detected by the brightness sensor 25 set on each light-emitting component 20. The detection data obtained by the brightness sensor 25 can be transmitted to the encoder, and the encoder can further transmit the detection data to the control center. The control center processes the detection data to determine whether the brightness of the light-emitting component 20 is lower than the set value (for example, 300nit); if it is lower than the set value, the light-emitting component 20 needs to be replaced, and if it is higher than the set value, the light-emitting component does not need to be replaced.

[0092] Step S2: obtaining the position of the light-emitting component whose luminous brightness is lower than the set value, and determining that the light-emitting component at the position needs to be replaced.

[0093] In step S2, the data transmitted by the brightness sensor 25 to the encoder may include its location information, that is, the location of the light-emitting component 20. Therefore, when the control center determines that a light-emitting component 20 has a brightness lower than a set value, the location of the light-emitting component 20 that needs to be replaced is obtained.

[0094] Step S3: Control the light-emitting component to be replaced to move along the aisle, and remove the backlight module from the end of the aisle through the entrance and exit of the back panel.

[0095] In step S3, the control center supplies power to the radio frequency tags 24 and 110, plans the movement path of the light-emitting component 20 to be replaced out of the backlight module, and then controls the light-emitting component 20 to move along the aisle 12 according to the path to the end of the aisle 12 located at the edge of the substrate 10, and moves out of the backlight module from the entrance 301 of the back panel 30.

[0096] In some embodiments, when a light-emitting component 20 with insufficient luminous brightness is moved out of the backlight module, there are other light-emitting components 20 on its moving path. These light-emitting components 20 on the moving path must be moved out of the backlight module first before the light-emitting component 20 with insufficient luminous brightness can be moved out. In this case, the control center can directly send a signal to the light-emitting components 20 on the moving path that need to be moved to control these light-emitting components 20 to move out of the backlight module first, or the light-emitting component 20 with insufficient luminous brightness can be moved to a light-emitting component close to the adjacent light-emitting component. 20, based on the position sensing relationship between the RFID tag 24 on the light-emitting component 20 with insufficient luminous brightness and the RFID tag 24 on the adjacent light-emitting component 20, the adjacent light-emitting components 20 on the moving path are informed that the light-emitting component 20 with insufficient luminous brightness is approaching, and then the adjacent light-emitting components 20 on the moving path begin to move along the moving path toward the outside of the backlight module. By analogy, the multiple light-emitting components 20 (including the light-emitting component 20 with insufficient luminous brightness and the light-emitting component 20 that needs to be moved first on the moving path) can be moved out of the backlight module together.

[0097] Step S4: Place the new light-emitting component into the end of the aisle from the entrance of the back panel, and control the new light-emitting component to move along the aisle.

[0098] In step S4, the RFID tag 110 on the substrate 10 is powered and activated. The control center can obtain the target position information of the light-emitting assembly 20 from the RFID tag 110. Based on this information, the control center can plan a movement path for the light-emitting assembly 20 to move to the target position on the substrate 10. The control center can then control the light-emitting assembly 20 to move along the aisle 12 according to the path to the position where the removed light-emitting assembly 20 was originally fixed, that is, the target position.

[0099] Step S5: Control the new light-emitting component to move to the target position according to the position tag on the new light-emitting component and the position tag of the target position.

[0100] In step S5, the RFID tag 24 on the light-emitting assembly 20 and the RFID tag 110 at the target location to which the light-emitting assembly 20 is to be moved are powered and activated. Based on the RFID tag 24 and the RFID tag 110, the control center can accurately determine the real-time location of the light-emitting assembly 20, the distance between the light-emitting assembly 20 and the target location, and whether the light-emitting assembly 20 has moved to the target location. This allows the control center to accurately control the movement of the light-emitting assembly 20 to the target location.

[0101] After the light emitting assembly 20 moves to the target position, the control center may control to stop supplying power to the radio frequency tags 24 and 110 , and the radio frequency tags 24 and 110 may be in an inactive state.

[0102] In one embodiment of the display device of the present invention, the display device includes a display panel and the backlight module described in the above embodiment. The light generated by the light-emitting element in the backlight module can serve as the backlight source of the display panel.

[0103] In this embodiment, the display panel can be a liquid crystal display panel. In this case, the backlight module described in the above embodiment can be used as the backlight source of the liquid crystal display panel. Generally, at this time, the brightness of light in various areas of the backlight module is consistent, and the liquid crystal display panel displays different brightness mainly by adjusting the transmittance of light through the liquid crystal layer.

[0104] The display device provided by the present invention includes the above-mentioned backlight module, and of course has the same beneficial effects as the above-mentioned backlight module, which will not be described in detail.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0106] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A backlight module, characterized in that: The backlight module includes a back plate and a substrate arranged on the back plate; The substrate is provided with a plurality of light-emitting components and a walkway; each light-emitting component includes a base and a light-emitting element provided on the base; the walkway connects the bases of the plurality of light-emitting components on the substrate, and the base of each light-emitting component can move along the walkway; the walkway has at least one end extending to the edge of the substrate; The back plate is provided with an entrance and exit, the entrance and exit corresponding to the position of the end of the walkway at the edge of the substrate, and the entrance and exit can accommodate the passage of the light-emitting component; The walkway includes a plurality of first walkways, each of the first walkways extends along a first direction, and the plurality of first walkways are arranged at intervals in a direction perpendicular to the first direction, and the base of each of the light-emitting components is connected and arranged on the first walkway; or The walkways include a plurality of first walkways and a plurality of second walkways, each of the first walkways extending along a first direction, connecting the bases of a row / column of light-emitting components in series; each of the second walkways extending along a second direction, the second direction intersecting the first direction, and each of the second walkways being arranged between two columns / rows of light-emitting components; or The walkway includes a first walkway extending along a first direction and a second walkway extending along a second direction, the first direction and the second direction intersect, and the base of each of the light-emitting components is arranged on the first walkway and the second walkway; The substrate has an electrical trough arranged along the walkway, and the base of the light-emitting assembly is provided with a roller terminal electrically connected to the light-emitting element. The roller terminal remains connected to the electrical trough when the base moves along the walkway.

2. The backlight module according to claim 1, wherein: Each of the light-emitting components includes a driving mechanism and a walking mechanism. The walking mechanism is arranged on the base. The driving mechanism is connected to the walking mechanism and is used to drive the walking mechanism to move along the walkway.

3. The backlight module according to claim 2, wherein: A rack is provided on the walkway, the walking mechanism includes a gear meshed with the rack, and the driving mechanism includes a stepping motor connected to the gear so that the gear meshes with the rack and moves along the rack.

4. The backlight module according to claim 3, wherein: Racks are respectively provided at the bottom, left side and right side of the walkway; the walking mechanism includes a plurality of gears, and the plurality of gears are respectively engaged with the racks located at the bottom, left side and right side of the walkway.

5. The backlight module according to claim 1, wherein: A first rack is provided at the bottom of the first walkway, and a second rack is provided at the bottom of the second walkway; a turntable is provided at the intersection of the first rack and the second rack, and a tooth structure is provided on the turntable, and the turntable can be rotated to a first state and a second state; in the first state, the tooth structure on the turntable is parallel to the tooth structure on the first rack, and in the second state, the tooth structure on the turntable is parallel to the tooth structure on the second rack; Each of the light-emitting components includes a driving mechanism and a traveling mechanism. The traveling mechanism is a gear that can engage with the first rack and the second rack. The driving mechanism is connected to the traveling mechanism and is used to drive the gear to move along the first aisle or the second aisle.

6. The backlight module according to claim 1, wherein: Each of the light-emitting components includes a radio frequency tag, and a radio frequency tag is arranged at the position where each of the light-emitting components is located on the substrate.

7. A method for replacing a light emitting component in a backlight module according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, detecting the luminance of each light-emitting component in the backlight module; Step S2, obtaining the position of the light-emitting component whose luminous brightness is lower than the set value, and determining that the light-emitting component at the position needs to be replaced; Step S3, controlling the light-emitting component to be replaced to move along the aisle, and removing the backlight module from the end of the aisle through the entrance and exit of the back panel; Step S4, placing a new light-emitting component into the end of the aisle from the entrance of the back panel, and controlling the new light-emitting component to move along the aisle; Step S5: Control the new light-emitting component to move to the target position according to the position tag on the new light-emitting component and the position tag of the target position.

8. A display device, characterized in that: The display device includes a display panel and the backlight module according to any one of claims 1 to 6.

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