Backlight board, backlight module and display panel

Abstract

A backlight board, a backlight module and a display panel. The backlight board comprises a circuit board (110), driving light-emitting groups (120), and a terminal block (130), the driving light-emitting groups (120) being arranged on the circuit board (110). Each driving light-emitting group (120) comprises a plurality of cascaded driver chips (121) and a plurality of strings of LED light-emitting devices (122), each driver chip (121) being connected to at least one string of LED light-emitting devices (122). Each string of LED light-emitting devices (122) comprises at least one LED light-emitting device (122). Each string of LED light-emitting devices (122), as a light-emitting partition (A), is individually controlled by the corresponding driver chip (121) to emit light. Each LED light-emitting device (122) comprises a plurality of LED light-emitting chips of different light-emitting colors. The first driver chip (121) in each driving light-emitting group (120) is connected to the terminal block (130). The LED light-emitting chips of the same light-emitting color in the last LED light-emitting device (122) in each string of LED light-emitting devices (122) in each driving light-emitting group (120) share a common electrode, and are connected to the terminal block (130).

Description

Backlight plate, backlight module and display panel

[0001] This application claims priority to the Chinese patent application No. 202411355076.6, filed on September 26, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to display technology, for example, to a backlight plate, a backlight module and a display panel. BACKGROUND

[0003] Liquid crystal display panels themselves do not emit light and need a backlight source to provide brightness. The backlight of a conventional liquid crystal display panel is overall controlled. When displaying pure black, the backlight source cannot be completely turned off, and the liquid crystal layer cannot completely block the backlight due to its own structural problems, resulting in that the black color does not appear pure enough. Therefore, it is difficult to achieve a high contrast between bright and dark in the same picture, leading to a general overall contrast performance.

[0004] To solve this problem, more and more display panels use regional light control or zoned light control (Local Dimming) technology. The regional light control technology divides the backlight source into multiple regions, each of which independently controls the brightness, thereby ensuring that the contrast between light and dark in the picture is more natural and the details are more rich.

[0005] In the case of a large number of partitions, the backlight plate of the regional light control technology in the related art has a large number of channels, i.e., a large number of wirings on the wiring board used by the backlight plate, which leads to a complex wiring of the wiring board and increases the design difficulty and cost of the backlight plate. SUMMARY

[0006] The present application provides a backlight plate, a backlight module and a display panel, which can reduce the number of wires connected to the terminal, and reduce the design difficulty and cost of the wiring board.

[0007] In a first aspect, the present application provides a backlight plate, comprising:

[0008] a wiring board;

[0009] a plurality of drive light emitting groups, the drive light emitting groups are arranged on the wiring board, each of the drive light emitting groups comprises a plurality of cascaded drive chips and a plurality of strings of LED light emitting devices, each of the drive chips is connected with at least one string of LED light emitting devices, each string of LED light emitting devices comprises at least one LED light emitting device, each string of LED light emitting devices is controlled to emit light by the corresponding drive chip as a light emitting partition, and the LED light emitting device comprises a plurality of LED light emitting chips of different colors;

[0010] The terminal is connected with the first driving chip in the driving light-emitting group and the common electrode of the LED light-emitting chip of the same light-emitting color in the last LED light-emitting device in each string of LED light-emitting devices in the driving light-emitting group.

[0011] In some embodiments, the LED light-emitting device comprises three LED light-emitting chips of different light-emitting colors, i.e., a red light-emitting chip, a green light-emitting chip and a blue light-emitting chip.

[0012] In some embodiments, the driving chip comprises a data input pin, a data output pin, a power input pin, a power output pin, a ground pin and at least one set of light-emitting control pins.

[0013] In the driving light-emitting group, the data input pin and the power input pin of the first driving chip are connected with the terminal, the data input pin of the kth driving chip is connected with the data output pin of the (k-1)th driving chip, the power input pin of the kth driving chip is connected with the power output pin of the (k-1)th driving chip, k is a positive integer greater than 1, the ground pins of the driving chips in each string are connected, the data output pin of the last driving chip is connected with the terminal, and the power output pin of the last driving chip is left unconnected.

[0014] The light-emitting control pins are connected with the corresponding string of LED light-emitting devices, each set of light-emitting control pins comprises a plurality of light-emitting control pins corresponding to the LED light-emitting chips in the LED light-emitting device, the i th light-emitting control pin is connected with the first electrode of the i th LED light-emitting chip in the first LED light-emitting device, the first electrode of the i th LED light-emitting chip in the j th LED light-emitting device is connected with the second electrode of the i th LED light-emitting chip in the (j-1) th LED light-emitting device, the second electrode of the i th LED light-emitting chip in the last LED light-emitting device is connected with the terminal, i is a positive integer, and j is a positive integer greater than 1.

[0015] In some embodiments, the number of driving chips in the driving light-emitting group is less than or equal to 10.

[0016] In some embodiments, the LED light-emitting device and the driving chip are separately arranged, and the side of the driving chip away from the circuit board is coated with a reflective material.

[0017] In some embodiments, the driving chip is integrated in the LED light-emitting device.

[0018] In some embodiments, the driving chip in the driving light-emitting group and the LED light-emitting device are arranged on the same side of the circuit board.

[0019] In some embodiments, the intersection of the LED light emitting chip and the connection of the terminal is insulated by a metal jumper.

[0020] In some embodiments, the number of channels of the terminal is calculated by the following formula:

[0021] Wherein, N is the number of channels of the terminal, n1 is the number of LED light emitting chips in a single LED light emitting device, n2 is the number of ground pins in the driving chip, n3 is the number of data input pins in the driving chip, n4 is the number of data output pins in the driving chip, n5 is the number of power input pins in the driving chip, n6 is the number of partitions, n7 is the number of driving chips in the driving light emitting group, and n8 is the number of light emitting control pin groups in a single driving chip.

[0022] In some embodiments, a temperature sensor is further provided on the circuit board, and the temperature sensor is connected with the terminal.

[0023] In a second aspect, the application further provides a backlight module, which comprises a control mainboard and a backlight lamp plate provided in the first aspect of the application, the control mainboard is electrically connected with the terminal of the backlight lamp plate, and is configured to output a power signal and a data signal to the terminal, so as to be transmitted to the first driving chip of the driving light emitting group through the terminal, and be transmitted through the driving chip cascade, thereby controlling the independent light emitting of each light emitting partition.

[0024] In a third aspect, the application further provides a display panel, which comprises the backlight module provided in the second aspect of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be described in detail below according to the drawings and embodiments.

[0026] FIG. 1 is a circuit structure diagram of a non-scanning area light control;

[0027] FIG. 2 is a circuit structure diagram of a scanning area light control;

[0028] FIG. 3 is a structure schematic diagram of a backlight lamp plate provided in the application;

[0029] FIG. 4 is a structure schematic diagram of a driving chip provided in the application;

[0030] FIG. 5 is a schematic diagram of a metal jumper provided in the application;

[0031] FIG. 6 is a structure schematic diagram of another backlight lamp plate provided in the application. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described below in conjunction with the drawings, which are described in the description of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the meaning of the above terms in the present application can be understood as appropriate.

[0034] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or indicates that the first feature is lower than the second feature in horizontal height. In addition, the terms "first", "second" are used to distinguish the description, and have no special meaning.

[0035] The related art area light control is divided into scanning type and non-scanning type, Fig. 1 is a circuit structure diagram of non-scanning type area light control, and Fig. 2 is a circuit structure diagram of scanning type area light control, taking a light emitting diode (LED) light emitting device as an example of a light emitting subarea, as shown in Fig. 1, the LED light emitting device 11 includes red (R), green (G) and blue (B) three-color light emitting chips, the anodes of all the light emitting chips are connected together and connected with a terminal 12 through a wire, and the cathodes of each light emitting chip are respectively connected with the terminal 12 through a wire. In this way, the calculation formula of the number of channels (the number of wires connected with the terminal) of the terminal 12 of the non-scanning type area light control is: channel number = subarea number × 3 + 1. As shown in Fig. 2, all the LED light emitting devices 21 are divided into a plurality of scanning areas S, each scanning area S includes a plurality of LED light emitting devices 21, and the LED light emitting device 21 includes R, G and B three-color light emitting chips. The cathodes of the light emitting chips of the same color in each scanning area S are electrically connected and connected with a terminal 22 through a wire; the anodes of the light emitting chips of the same color of the LED light emitting devices 21 at the same position in each scanning area S are connected and connected with the terminal 22 through a wire. In this way, the calculation formula of the number of channels (the number of wires connected with the terminal) of the terminal 22 of the scanning type area light control is: channel number = (subarea number / scanning area number + scanning area number) × 3. The scanning type area light control increases the maximum current of a single channel, so the number of scanning areas cannot be too high, and is generally below 8. Taking the subarea number as 600 for example, the number of channels of the non-scanning type area light control is 1801. Taking the subarea number as 600 and the scanning area number as 8 for example, the number of channels of the scanning type area light control is 249. It can be seen that the number of channels of both the non-scanning type area light control and the scanning type area light control is relatively large, which leads to complex circuit board wiring and increases the design difficulty and cost of the backlight panel.

[0036] The application provides a backlight panel, and Fig. 3 is a structural schematic diagram of the backlight panel provided by the application, as shown in Fig. 3, the backlight panel includes:

[0037] A circuit board 110, and the circuit board 110 is provided with metal wires.

[0038] A plurality of driving light emitting groups 120 are arranged on the circuit board 110, each of the driving light emitting groups 120 includes a plurality of cascaded driving chips 121 and a plurality of strings of LED light emitting devices, each of the driving chips 121 is connected with at least one string of LED light emitting devices, each of the strings of LED light emitting devices includes at least one LED light emitting device 122, and each of the strings of LED light emitting devices is controlled to emit light by the corresponding driving chip 121 as a light emitting sub-area A, and the LED light emitting device 122 includes a plurality of LED light emitting chips of different light emitting colors. For example, the LED light emitting chip can be a Mini Light-Emitting Diode (Mini LED) or a Micro Light-Emitting Diode (Micro LED).

[0039] A wiring terminal 130 is connected with the first driving chip 121 in the driving light emitting group 120, and the LED light emitting chips of the same light emitting color in the last LED light emitting device 122 in each string of LED light emitting devices in the driving light emitting group 120 are connected with the wiring terminal 130 in common. The wiring terminal 130 is used to receive power signals and data signals from a control main board and transmit the power signals and the data signals to the driving chip 121. The control main board can be a control main board of a display panel.

[0040] For example, the power signals from the control main board are transmitted to the next level by the cascaded driving chips 121 in sequence, and the LED light emitting devices 122 are provided with working power. The data signals from the control main board are transmitted to the next level by the driving chips 121 in sequence, and the corresponding LED light emitting devices 122 are controlled to emit light. For example, the data signals can include a driving chip selection signal and a current adjusting signal, the driving chip selection signal can select the driving chip 121 to be controlled according to the address of the driving chip 121, and then control the corresponding LED light emitting device 122 to work, and the current adjusting signal is used to control the working current of the LED light emitting device 122 to control the brightness of the LED light emitting device 122, so as to realize area light control.

[0041] The backlight panel provided in the application comprises a circuit board 110, a driving light-emitting group 120 and a terminal 130. The driving light-emitting group 120 is arranged on the circuit board 110. Each driving light-emitting group 120 comprises a plurality of cascaded driving chips 121 and a plurality of LED light-emitting devices. Each driving chip 121 is connected with at least one LED light-emitting device. Each LED light-emitting device comprises at least one LED light-emitting chip. Each LED light-emitting device is controlled to emit light by the corresponding driving chip 121 as a light-emitting subarea. The LED light-emitting chip 122 comprises a plurality of LED light-emitting chips with different light-emitting colors. The first driving chip 121 in the driving light-emitting group 120 is connected with the terminal 130. The LED light-emitting chip with the same light-emitting color in the last LED light-emitting device in each LED light-emitting device in the driving light-emitting group 120 is connected with the terminal 130. Since only the first driving chip 121 in each driving light-emitting group 120 is connected with the terminal 130, the power supply signal and the data signal are transmitted to the next driving chip 121 in a cascaded manner, thereby reducing the number of wires connected with the terminal 130 and reducing the design difficulty and cost of the circuit board 110.

[0042] In some embodiments of the application, as shown in FIG. 3, the LED light-emitting device 122 comprises three LED light-emitting chips with different light-emitting colors, i.e., a red light-emitting chip R, a green light-emitting chip G and a blue light-emitting chip B. In other embodiments of the application, in order to improve the color gamut of the LED light-emitting device and the display effect of the display panel, the LED light-emitting device can also comprise four LED light-emitting chips with different light-emitting colors, such as a red light-emitting chip, a green light-emitting chip, a blue light-emitting chip and a white light-emitting chip.

[0043] FIG. 4 is a structural schematic diagram of the driving chip provided in the application. As shown in FIGS. 3 and 4, the driving chip 121 comprises a data input pin DI, a data output pin DO, a power supply input pin VI, a power supply output pin VO, a ground pin GND and at least one group of light-emitting control pins. For example, in this embodiment, the driving chip 121 comprises two groups of light-emitting control pins. Each group of light-emitting control pins comprises three light-emitting control pins. The first group comprises a red light-emitting control pin R_1, a green light-emitting control pin G_1 and a blue light-emitting control pin B_1. The second group comprises a red light-emitting control pin R_2, a green light-emitting control pin G_2 and a blue light-emitting control pin B_2.

[0044] In the driving light-emitting group 120, the data input pin DI and the power input pin VI of the first driving chip 121 are connected with the terminal 130 through wires, the data input pin DI of the kth driving chip 121 is connected with the data output pin DO of the (k-1)th driving chip 121, the power input pin VI of the kth driving chip 121 is connected with the power output pin VO of the (k-1)th driving chip 121, k is a positive integer greater than 1, the ground pins GND of the driving chips 121 in each string are connected and connected with the terminal 130 through a wire, the data output pin DO of the last driving chip 121 is connected with the terminal 130, and the power output pin VO of the last driving chip 121 is set as suspended.

[0045] A set of light emitting control pins is connected with a corresponding string of LED light emitting devices, each set of light emitting control pins includes a plurality of light emitting control pins corresponding to LED light emitting chips in the LED light emitting devices 122, the ith light emitting control pin is connected with a first electrode of the ith LED light emitting chip in the first LED light emitting device 122, a first electrode of the ith LED light emitting chip in the jth LED light emitting device 122 is connected with a second electrode of the ith LED light emitting chip in the j-1th LED light emitting device 122, a second electrode of the ith LED light emitting chip in the last LED light emitting device 122 is connected with the terminal 130, i is a positive integer, and j is a positive integer greater than 1. For example, one of the driving chips 121 controls two strings of LED light emitting devices, the red light emitting control pin R_1 is connected with a first electrode of a red light emitting chip R of a first LED light emitting device in the first string of LED light emitting devices, the green light emitting control pin G_1 is connected with a first electrode of a green light emitting chip G of the first LED light emitting device in the first string of LED light emitting devices, and the blue light emitting control pin B_1 is connected with a first electrode of a blue light emitting chip B of the first LED light emitting device in the first string of LED light emitting devices. Similarly, the red light emitting control pin R_2 is connected with a first electrode of the red light emitting chip R of the first LED light emitting device in the second string of LED light emitting devices, the green light emitting control pin G_2 is connected with a first electrode of the green light emitting chip G of the first LED light emitting device in the second string of LED light emitting devices, and the blue light emitting control pin B_2 is connected with a first electrode of the blue light emitting chip B of the first LED light emitting device in the second string of LED light emitting devices. The common electrodes of the same color LED light emitting chips in the last LED light emitting device 122 in each string of LED light emitting devices in the driving light emitting group 120 are connected together and connected with the terminal 130. For example, in the driving light emitting group 120, the second electrodes of the red light emitting chips R are connected together and connected with the terminal 130 through a wire, the second electrodes of the green light emitting chips G are connected together and connected with the terminal 130 through a wire, and the second electrodes of the blue light emitting chips B are connected together and connected with the terminal 130 through a wire.

[0046] According to the connection relationship of the backlight panel described above, the calculation formula of the number of channels of the terminal 130 (i.e. the number of wires connected with the terminal 130) is:

[0047] Wherein, N is the number of channels of the wiring terminal 130, n1 is the number of LED light emitting chips in the single LED light emitting device 122, n2 is the number of ground pins GND in the driving chip 121, n3 is the number of data input pins DI in the driving chip 121, n4 is the number of data output pins DO in the driving chip 121, n5 is the number of power input pins VI in the driving chip 121, n6 is the number of partitions, n7 is the number of driving chips 121 in the driving light emitting group 120, and n8 is the number of light emitting control pin groups of the single driving chip 121.

[0048] In some embodiments of the present application, due to the delay and interference problems of signal transmission, the cascade signal of the driving chip 121 cannot be transmitted infinitely, and it is generally appropriate that the number of cascade driving chips 121 is not more than 10. In an embodiment of the present application, the number of cascade driving chips 121 in each driving light emitting group 120 is 10.

[0049] For example, taking the number of partitions as 600 and the number of cascade driving chips 121 in each driving light emitting group 120 as 10 as an example, in the embodiment, the number of LED light emitting chips n1 in the single LED light emitting device 122 is 3, the number of ground pins GND n2 in the driving chip 121 is 1, the number of data input pins DI n3 in the driving chip 121 is 1, the number of data output pins DO n4 in the driving chip 121 is 1, the number of power input pins VI n5 in the driving chip 121 is 1, the number of partitions n6 is 600, the number of driving chips 121 n7 in the driving light emitting group 120 is 10, and the number of light emitting control pin groups n8 of the single driving chip is 2. Through the above channel number calculation formula of the wiring terminal 130, the number of channels N of the wiring terminal 130 of the present application is calculated as 94. In the case of the same number of partitions, the number of wires connected with the wiring terminal 130 can be significantly reduced, and the design difficulty and cost of the circuit board are reduced.

[0050] In some embodiments of the present application, as shown in FIG. 3, the LED light emitting device 122 and the driving chip 121 are separately arranged. The driving chip 121 is generally packaged by black epoxy, which has a certain light absorption, reducing the light efficiency of the backlight lamp plate. In order to improve the light efficiency of the backlight lamp plate, the driving chip 121 is coated with a reflective material away from the side of the circuit board 110.

[0051] In some other embodiments of the present application, the driving chip 121 is integrated in the LED light emitting device 122, which can improve the integration of the backlight lamp plate, and at the same time, the design difficulty and cost of the circuit board are reduced.

[0052] In some embodiments of the present application, as shown in FIG. 3, the driving chips 121 and the LED light emitting devices 122 in the light emitting group 120 are arranged on the same side of the circuit board 110, i.e. the circuit board 110 only needs to be designed as a single layer circuit, which reduces the design cost and difficulty of the circuit board 110.

[0053] In some embodiments of the present application, there is a cross between the connection lines between the LED light emitting chips and the terminals. The cross of the connection lines is insulated and isolated by a metal jumper, so that all the wires on the circuit board 110 are concentrated on the same side, i.e. the circuit board 110 only needs to be designed as a single layer circuit, which reduces the cost of the circuit board 110. FIG. 5 is a schematic diagram of a metal jumper provided by the present application. Taking the cross section of the cross of the wires shown in the area C in FIG. 3 as an example, as shown in FIG. 3 and FIG. 5, the wire L1 connecting the red light emitting chip crosses the wire L2 connecting the green light emitting chip and the wire L3 connecting the blue light emitting chip in space. In order to avoid short circuit between the wires, the wire L1 crosses the wire L2 and the wire L3 by a metal jumper, so as to insulate and isolate the wire L1 from the wire L2 and the wire L3.

[0054] In some embodiments of the present application, a temperature sensor is further arranged on the circuit board, and the temperature sensor is connected with the terminal. For example, FIG. 6 is a structural schematic diagram of another backlight lamp plate provided by the present application. As shown in FIG. 6, the temperature sensor 140 can be arranged at the center position of the circuit board 110, and the temperature sensor 140 is connected with the terminal 130 by two wires, which are respectively used for power supply and signal transmission. The temperature sensor 140 is arranged to collect the temperature of the backlight lamp plate. Since the brightness-temperature curves of the R, G and B light emitting chips are inconsistent, the brightness attenuation degrees of the three kinds of light emitting chips are different with the increase of the temperature of the backlight lamp plate, especially the brightness of the red light emitting chip R is sensitive to the temperature change, which leads to the color cast and affects the display effect. The present application can test and save the brightness-temperature curves of the three kinds of light emitting chips in advance, measure the current compensation tables of the three kinds of light emitting chips reaching the same brightness level at different temperatures, and burn the current compensation tables into the driving chip 121 in advance. During the working process of the backlight lamp plate, the temperature of the backlight lamp plate is collected in real time by the temperature sensor 140, and the current compensation saved in advance is output, so as to ensure that the brightness levels of the three kinds of light emitting chips are consistent, thereby avoiding the color cast and improving the display effect.

[0055] As shown in FIG. 6, the difference between this embodiment and the foregoing embodiments is that each light emitting sub-area A only contains one LED light emitting device 122, which can reduce the area of the light emitting sub-area capable of independently controlling light emission, enrich the detail level of the display picture, and improve the display effect. The same parts of this embodiment and the foregoing embodiments will not be described here.

[0056] The application further provides a backlight module comprising the backlight lamp panel provided in any of the preceding embodiments of the application, and the backlight module can achieve the functions and effects achieved by the backlight lamp panel provided in any of the preceding embodiments of the application.

[0057] In some embodiments, as shown in FIG. 6, the backlight module further comprises a control mainboard 150, which is electrically connected with the wiring terminal 130 of the backlight lamp panel and is configured to output power signals and data signals to the wiring terminal 130 so as to be transmitted to the first driving chip 121 of the light-emitting group 120 through the wiring terminal 130 and be transmitted in cascade through the driving chips, thereby controlling the independent light-emission of each light-emitting sub-area A.

[0058] The application further provides a display panel comprising the backlight module provided in any of the preceding embodiments of the application, and the display panel can achieve the functions and effects achieved by the backlight lamp panel provided in any of the preceding embodiments of the application.

[0059] In the description herein, it should be understood that the orientation or position relationship of the terms “upper”, “lower”, “left”, “right” and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0060] In the description of the present specification, the description referring to the terms “an embodiment”, “an example” and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0061] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A backlight panel, comprising: a circuit board; a plurality of driving light-emitting groups disposed on the circuit board, each of the driving light-emitting groups comprising a plurality of cascaded driving chips and a plurality of strings of light-emitting diode (LED) light-emitting devices, each of the driving chips being connected with at least one string of the LED light-emitting devices, each string of the LED light-emitting devices comprising at least one LED light-emitting chip, and each string of the LED light-emitting devices being controlled to emit light by a corresponding driving chip as a light-emitting sub-area, the LED light-emitting devices comprising a plurality of LED light-emitting chips of different light-emitting colors; a terminal, a first driving chip in each of the driving light-emitting groups being connected with the terminal, and a common electrode of the LED light-emitting chips of the same light-emitting color in a last LED light-emitting device in each string of the LED light-emitting devices being connected with the terminal.

2. The backlight panel of claim 1, wherein, The LED light-emitting devices comprise three LED light-emitting chips of different light-emitting colors, which are a red light-emitting chip, a green light-emitting chip and a blue light-emitting chip respectively.

3. The backlight panel according to claim 1 or 2, wherein The driving chips comprise a data input pin, a data output pin, a power input pin, a power output pin, a ground pin and at least one group of light-emitting control pins. In each of the driving light-emitting groups, the data input pin and the power input pin of the first driving chip are connected with the terminal, the data input pin of the kth driving chip is connected with the data output pin of the (k-1)th driving chip, the power input pin of the kth driving chip is connected with the power output pin of the (k-1)th driving chip, k is a positive integer greater than 1, the ground pins of the plurality of driving chips in each string of the driving chips are connected, the data output pin of the last driving chip is connected with the terminal, and the power output pin of the last driving chip is provided in a suspended manner. Each group of the light-emitting control pins is connected with a corresponding string of the LED light-emitting devices, each group of the light-emitting control pins comprises a plurality of light-emitting control pins corresponding to the LED light-emitting chips, the i th light-emitting control pin is connected with a first electrode of the i th LED light-emitting chip in the first LED light-emitting device, a first electrode of the i th LED light-emitting chip in the j th LED light-emitting device is connected with a second electrode of the i th LED light-emitting chip in the (j-1) th LED light-emitting device, a second electrode of the i th LED light-emitting chip in the last LED light-emitting device is connected with the terminal, i is a positive integer, and j is a positive integer greater than 1.

4. The backlight panel according to claim 1 or 2, wherein The number of the driving chips in each of the driving light-emitting groups is less than or equal to 10.

5. The backlight panel according to claim 1 or 2, wherein The LED light-emitting devices and the driving chips are separately provided, and a reflective material is coated on a side of the driving chips away from the circuit board.

6. The backlight panel of claim 1 or 2, wherein, The driving chips are integrated in the LED light-emitting devices.

7. The backlight panel according to claim 1 or 2, wherein The driving chips in each of the driving light-emitting groups and the LED light-emitting devices are provided on a same side of the circuit board.

8. The backlight panel of claim 7, wherein, Metal jumpers are used for insulation isolation at intersections of the LED light-emitting chips and the wires of the terminal.

9. The backlight panel of claim 3, wherein, The number of passages of the terminal is calculated by the following formula: Wherein, N is the number of channels of the terminal, n1 is the number of LED light emitting chips in a single LED light emitting device, n2 is the number of ground pins in the driving chip, n3 is the number of data input pins in the driving chip, n4 is the number of data output pins in the driving chip, n5 is the number of power input pins in the driving chip, n6 is the number of partitions, n7 is the number of driving chips in the driving light emitting group, and n8 is the number of light emitting control pin groups of a single driving chip.

10. The backlight panel of claim 1, wherein, The circuit board is further provided with a temperature sensor, which is connected with the terminal. 11.A backlight module, comprising a control mainboard and the backlight lamp plate according to any one of claims 1-10, wherein the control mainboard is electrically connected with the terminal of the backlight lamp plate, and is configured to output power signals and data signals to the terminal, so as to be transmitted to the first driving chip of the driving light emitting group through the terminal, and be transmitted through the driving chip cascade, thereby controlling the independent light emitting of each light emitting partition. 12.A display panel, comprising the backlight module according to claim 11.

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