Display device

Abstract

A display device (200), comprising a display panel (10), a controller (250), a backlight assembly (20) and a distribution circuit (290), wherein the backlight assembly (20) comprises a plurality of drive groups (201) and a plurality of light-emitting unit groups (31), each drive group (201) comprising at least one driver IC (202); a first end of the distribution circuit (290) is electrically connected to the controller (250), and a second end of the distribution circuit (290) is electrically connected to at least one drive group (201); and when the controller (250) controls the backlight assembly (20) to emit light, the controller (250) processes image data, so as to generate drive data, and the distribution circuit (290) transmits the drive data to a corresponding drive group (201), so as to drive a corresponding light-emitting unit group (31) to emit light. In the circuit structure, the distribution circuit (290) can separate and process the operations of the controller (250) that require the support of a high frequency, such as data transmission, such that the requirement of the controller (250) for a main frequency is reduced, the processing procedures of the distribution circuit (290) and the controller (250) are more targeted, and the combined cost is lower than the cost of the controller (250) that has high overall requirements for the main frequency and data processing computing power, thereby decreasing the cost of the display device (200).

Description

A display device

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to Chinese applications No. 202411376689.8, filed on September 29, 2024, and No. 202422390834.X, filed on September 29, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] Embodiments of the present disclosure relate to display technology. More specifically, to a display device. BACKGROUND

[0004] A display device is a device for displaying an image and / or a user interface. The display device includes a controller, a display panel, and a backlight assembly including a driving circuit and a plurality of light emitting unit groups each including at least one lamp bead. The driving circuit drives the plurality of light emitting unit groups to emit light.

[0005] As the number of light emitting unit groups increases, the controller processes more image data for each frame in the display device, and the frequency of sending and receiving electrical signals between the controller and the backlight assembly also increases, resulting in high cost of the display device. How to reduce the cost of the display device has become the focus of research. SUMMARY

[0006] The display device provided by the present disclosure can include a controller configured to obtain image data, generate backlight brightness data and display data; a display panel electrically connected with the controller and configured to display a picture based on the display data; a distribution circuit electrically connected with the controller and including a plurality of data transmission modules and at least one data receiving module; wherein different data transmission modules are electrically connected with different driving groups; the at least one data receiving module is configured to output driving data segments to the plurality of data transmission modules according to a preset data transmission sequence; any one of the data transmission modules is configured to output a preset number of driving data segments to driving chips in the connected driving group after obtaining the preset number of driving data segments; a backlight assembly is arranged on a side away from a display surface of the display panel, and the backlight assembly includes a plurality of driving groups, a second end of the distribution circuit is electrically connected with a first end of the driving groups respectively; the driving group includes at least one driving chip electrically connected with the driving group; the at least one driving chip is configured to obtain the preset number of driving data segments corresponding to the driving chip and output driving signals based on the driving data segments; the driving data segments corresponding to different driving chips are different; a plurality of light emitting unit groups are electrically connected with the driving chip and at least one light emitting unit group, and the light emitting unit group is configured to emit light based on the driving signals; wherein the light emitting unit groups electrically connected with different driving chips are different. BRIEF DESCRIPTION OF DRAWINGS

[0007] FIG. 1 is a schematic diagram of an operating scenario between a display device and a control device according to some embodiments;

[0008] FIG. 2 is a structural schematic diagram of a display device including parallel driving chips according to some embodiments;

[0009] FIG. 3 is a circuit structural schematic diagram of a backlight assembly according to some embodiments;

[0010] FIG. 4 is another structural schematic diagram of a display device according to some embodiments;

[0011] FIG. 5 is another structural schematic diagram of a display device according to some embodiments;

[0012] FIG. 6 is another structural schematic diagram of a display device according to some embodiments;

[0013] FIG. 7 is another structural schematic diagram of a display device according to some embodiments;

[0014] FIG. 8 is another structural schematic diagram of a display device according to some embodiments;

[0015] FIG. 9 is another structural schematic diagram of a display device according to some embodiments;

[0016] FIG. 10 is yet another structural schematic diagram of a display device according to some embodiments;

[0017] FIG. 11 is yet another structural schematic diagram of a display device according to some embodiments;

[0018] FIG. 12 is a transmission timing diagram of driving data according to some embodiments;

[0019] FIG. 13 is yet another structural schematic diagram of a display device according to some embodiments;

[0020] FIG. 14 is a schematic diagram of a series connection of distribution circuits according to some embodiments;

[0021] FIG. 15 is a schematic diagram of a parallel connection of distribution circuits according to some embodiments;

[0022] FIG. 16 is a schematic diagram of a series-parallel connection of distribution circuits according to some embodiments;

[0023] FIG. 17 is yet another structural schematic diagram of a display device according to some embodiments;

[0024] FIG. 18 is yet another structural schematic diagram of a display device according to some embodiments;

[0025] FIG. 19 is an equivalent schematic diagram of a voltage control module according to some embodiments;

[0026] FIG. 20 is yet another equivalent schematic diagram of a voltage control module according to some embodiments. DETAILED DESCRIPTION

[0027] The display device provided by the embodiments of the present disclosure can have various implementation forms, for example, can be a smart television, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc.

[0028] FIG. 1 is a schematic diagram of an operating scenario between a display device and a control device according to some embodiments. As shown in FIG. 1, a user can operate the display device 200 through the smart device 300 or the control device 100.

[0029] In some embodiments, the control device 100 can be a remote controller, and the communication between the remote controller and the display device 200 includes infrared protocol communication or Bluetooth protocol communication, and other short-distance communication modes, to control the display device 200 through wireless or wired mode. The user can input user instructions through the keys on the remote controller, voice input, control panel input, etc., to control the display device 200.

[0030] In some embodiments, the smart device 300 (such as a mobile terminal, a tablet computer, a computer, a notebook computer, etc.) can also be used to control the display device 200. For example, the display device 200 is controlled using an application program running on the smart device. The display device 200 can receive instructions without using the smart device 300 or the control device 100 described above, but by touch or gesture, etc.

[0031] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300, for example, the display device 200 can directly receive voice instructions from the user through a voice instruction acquisition module configured inside the display device 200, or the display device 200 can receive voice instructions from the user through a voice control device configured outside the display device 200.

[0032] In some embodiments, the display device 200 can also communicate data with the server 400. The display device 200 can be allowed to communicate through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactions to the display device 200. The server 400 can be a cluster or multiple clusters, and can include one or more types of servers. The display device 200 can include a display panel 210, which includes liquid crystal molecules configured to deflect based on received processed display data. A backlight assembly 220 is configured to emit light based on backlight driving data. The display panel 210 can display a picture based on the backlight provided by the backlight assembly 220. A controller 230 is configured to receive a video input signal or an image input signal, obtain backlight brightness data and display data from the video input signal or the image input signal, and output the backlight brightness data and the display data after performing format conversion, timing control, etc.

[0033] In some embodiments, the controller 250 includes a SOC 251 configured to perform format conversion, data processing, image rendering, protocol conversion, etc. on the input signal to generate display intermediate data. In some embodiments, the controller 250 includes a timing controller (Tcon) 252 electrically connected to the SOC 251, and the timing controller 252 is configured to obtain the display intermediate data, process the display intermediate data, and output the display data in a timing manner. The display intermediate data cannot be directly processed by the display panel 10, and the display data is data that can be processed by the display panel 10.

[0034] In some embodiments, the timing controller 252 is configured to map the display data to the positions of the liquid crystal molecules, so that the display panel obtains the data corresponding to the display, ensuring the accuracy of the display.

[0035] In some embodiments, the controller 250 can include a backlight controller (Bcon) 270 or a dimming controller (DCON) configured to obtain processing data associated with backlight brightness data, generate and output driving data from the processing data. The backlight brightness data is data generated based on the image data input to the controller 250, which is data for regulating the brightness of the backlight assembly, and the backlight brightness data includes current and / or duty cycle. Referring to the circuit structure shown in FIG. 2, the backlight controller 270 is electrically connected to the SOC 251, and the SOC 251 is configured to output the backlight brightness data based on the input image data.

[0036] In some embodiments, referring to the circuit structure shown in FIG. 2, the plurality of drive chips 202 in the drive group 201 are connected in parallel, the input terminals DIN of the drive chips 202 in the drive group 201 are electrically connected in parallel, and the output terminals DOUT of the drive chips 202 are electrically connected in parallel. The input terminal DIN is configured to receive a first electrical signal output by the controller 250. The first electrical signal includes driving data. In some embodiments, the output terminal DOUT is configured to output a feedback signal to the controller 250. In the above circuit structure, the parallel connection of the plurality of drive chips 202 helps to improve the data transmission efficiency.

[0037] A schematic diagram of the physical structure of the backlight assembly 20 and the display panel 10 is shown in FIG. 3. The display panel 10 is placed on the upper side of the backlight assembly, and the upper side of the display panel 10 can display images. In some embodiments, the backlight assembly 20 includes a back plate 407 configured to provide a supporting substrate. In some embodiments, the backlight assembly 20 includes a lamp plate 30 on which lamp beads 301 are arranged, configured to provide backlight. In some embodiments, the backlight assembly 20 includes a reflective sheet 404 configured to reflect the backlight of the lamp plate 30 in the direction of the diffusion plate 402. The arrangement order of the components from top to bottom is: a film sheet 401, a diffusion plate 402, a support 403, a reflective sheet 404, a lamp plate 30, and a back plate 407. In some embodiments, the backlight assembly 20 includes a support 403 configured to support the diffusion plate 402, the film sheet 401, and the like, to maintain the optical distance between the lamp plate 30 and the diffusion plate 402. The film sheet 401 is configured to improve the reflection efficiency of the backlight generated by the backlight assembly, adjust the light, increase the brightness and color saturation of the output image of the display, increase the utilization rate of light, and enable the screen to normally display images. The diffusion plate 402 is configured to scatter light and uniformly guide light, so that the brightness distribution of the entire display panel is more uniform.

[0038] In some embodiments, as an example of a micro-LED display device, the backlight assembly 20 is provided with multiple lamp plates 30. The multiple lamp plates 30 emit light jointly after being spliced to provide backlight to the display panel 10. Each lamp plate 30 includes multiple light-emitting areas, and each light-emitting area (also referred to as a partition) includes multiple micro lamp beads. The micro lamp beads are mini LEDs, micro LEDs, or other micrometer-level lamp beads. The lamp plate 30 is electrically connected to at least one driving group 201. In some embodiments, the driving group 201 is arranged on the lamp plate 30. The driving group 201 includes one or more driving chips. The driving chip 201 of each partition receives driving data sent by a backlight controller 270 and drives the corresponding lamp beads 301 to emit light based on the driving data, thereby achieving local backlight control of the backlight assembly 20, i.e., Local dimming, so as to achieve more accurate area light control and make the screen brightness more uniform and harmonious.

[0039] With the increase in the number of partitions, the image data to be processed by the controller 250 in the display device increases. In order to enable the driving data generated based on the image data to be completely transmitted to the backlight assembly 20, the transmission frequency of the electrical signals exchanged between the controller 250 and the backlight assembly 20 is also increased. The controller 250 needs to meet the requirements of large storage space, large computing power, and high main frequency.

[0040] Taking the circuit structure shown in FIG. 2 as an example, the SOC 251 in the controller 250 processes the image data to generate backlight brightness data, the backlight controller 270 can store the backlight brightness data, convert the backlight brightness data into driving data based on the AM driving protocol, map the driving data according to the distribution of the light emitting unit group and output the driving data, and can also receive a feedback signal output by the driving chip 202 to the backlight controller 270 when the driving chip 202 drives the light emitting unit group, and adjust the output voltage value of the power supply circuit 13 based on the feedback signal. The backlight controller 270 not only needs to meet the demand of processing large amount of data, but also needs to meet the demand of high frequency, resulting in high comprehensive requirement of the backlight controller 270 and increasing cost.

[0041] Since the backlight controller 270 generally processes and sends data after obtaining all the backlight brightness data, in the case of a large number of partitions on the backlight assembly 20, the corresponding amount of backlight brightness data is also large, and the transmission time of the backlight brightness data is long, resulting in data sending lag and resource waste. Data sending lag can easily lead to display synchronization of the backlight assembly 20 and the display panel 10.

[0042] Therefore, the display device provided by the embodiments of the present disclosure is provided, and the technical concept is that a distribution circuit is arranged in the display device to separate the data transmission and other operations that require high frequency support of the controller for processing, thereby reducing the demand of the controller on the frequency. The controller only needs to use its high computing power to process display data, the processing processes of the distribution circuit and the controller are more targeted, and the joint cost is lower than the cost of the controller with high comprehensive requirements on the frequency and data processing computing power, thereby reducing the cost of the display device.

[0043] The scheme of the present disclosure will be described in detail below in combination with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments.

[0044] FIG. 4 is a structural schematic diagram of a display device according to some embodiments. As shown in the figure, in some embodiments, the display device includes a distribution circuit 290, a first end of the distribution circuit 290 is electrically connected with the controller 250, and the distribution circuit 290 is configured to output driving data from a second end of the distribution circuit 290 after obtaining the driving data from the controller 250; the backlight assembly 20 is arranged on a side away from the display side of the display panel 20, the backlight assembly 20 includes a plurality of driving groups 201, and the second end of the distribution circuit 290 is electrically connected with the first end of at least one driving group 201.

[0045] In some embodiments, the driving group 201 includes at least one driving chip 202, an input end of the driving chip 202 is electrically connected to the first end of the driving group 201, and the driving chip 202 is configured to obtain a driving data segment corresponding to the driving chip 202 in driving data, and output a driving signal based on the driving data segment. The driving data includes at least one driving data segment, and the driving data segments corresponding to different driving chips 202 are different.

[0046] In some embodiments, the backlight assembly 20 further includes a plurality of light emitting unit groups, the driving chip 202 is electrically connected to at least one light emitting unit group, and the light emitting unit group is configured to emit light based on the driving signal. Different light emitting unit groups 31 electrically connected to different driving chips 202 are different, so as to realize corresponding driving of the light emitting unit groups.

[0047] In some embodiments, the length of the driving data segment obtained by the driving chip 202 is proportional to the number of the light emitting unit groups 31 electrically connected to the driving chip 202, and the light emitting unit group 31 includes at least one lamp bead 301.

[0048] In some embodiments, the display device includes a display panel, a controller, a backlight assembly, a distribution circuit, the backlight assembly includes a plurality of driving groups and a plurality of light emitting unit groups, each driving group includes at least one driving chip, a first end of the distribution circuit is electrically connected to the controller, and a second end of the distribution circuit is electrically connected to at least one driving group. When the controller controls the backlight assembly to emit light, the controller processes image data to generate driving data, and the distribution circuit transmits the driving data to corresponding driving groups to drive corresponding light emitting unit groups to emit light. In the above circuit structure, the distribution circuit can separate the data transmission and other operations required by the controller with high frequency support for processing, reducing the demand of the controller on the main frequency. The processing process of the distribution circuit and the controller is more targeted, and the joint cost is lower than the cost of the controller with high requirements on the main frequency and data processing power. Therefore, the cost of the display device can be reduced.

[0049] In some embodiments, the controller 250 includes an SOC 251 or a timing controller 252.

[0050] In some embodiments, referring to the circuit structure shown in FIG. 5, the first end of the distribution circuit 290 is electrically connected to the SOC 251. In this connection mode, the operation of the SOC 251 is more concentrated, and the operation utilization rate of the SOC 251 can be improved.

[0051] In some embodiments, referring to the circuit structure shown in FIG. 6, the first end of the distribution circuit 290 is electrically connected to the timing controller 252. In this connection mode, the driving data can be generated jointly by the SOC 251 and the timing controller 252, which helps to increase the generation link of the driving data to improve the display effect, or helps to release the operation power of the SOC 251 by distributing part of the operation process in the timing controller 252, improve the operation power utilization rate of the timing controller 252, and reduce the algorithm demand of the SOC 251.

[0052] In some embodiments, the distribution circuit 290 includes a data transmission module 291, the first end 297 of the data transmission module 291 is electrically connected to the controller 250, and the second end of the data transmission module 291 is electrically connected to the corresponding driving group 201 of the data transmission module 291.

[0053] In some embodiments, referring to the circuit structure shown in FIGS. 4-6, the distribution circuit 290 includes at least one data transmission path (such as path A in the figure), which is connected to at least one driving group 201. The data transmission path is configured to transmit backlight driving data to the connected driving group 201, so that the driving group 201 drives the connected light emitting assembly to provide backlight. The number of data transmission paths is the same as the number of driving groups 201. Each data transmission path is connected between the controller 250 and a driving group 201. Each data transmission path receives the backlight driving data output by the controller 250 and transmits the backlight driving data to the driving group 201, so that the driving group 201 drives the connected light emitting assembly to provide backlight.

[0054] The data transmission path has data transmission and distribution functions, and can separate the data transmission operations required by the backlight controller 250 to support high frequency and other operations for processing, reducing the demand for main frequency of the controller 250 in the embodiment. The processing process of the distribution circuit 290 and the controller 250 is more targeted, and the joint cost is lower than the cost of the controller 250 which requires high main frequency and data processing algorithm.

[0055] In some embodiments, the data transmission path can be one path, which is connected to a driving group 201 and is configured to transmit the backlight driving data output by the controller 250 to the driving group 201. The data transmission path is multiple paths, each path is connected to the controller 250 and a driving group 201. The driving groups 201 connected by different data transmission paths are different. The multiple data transmission paths transmit the backlight driving data output by the controller 250 to the connected driving groups 201 in parallel.

[0056] In the above process, the display device includes a display panel 10, a backlight assembly 20, a controller 250, and a distribution circuit 290. The backlight assembly 20 is located away from the display side of the display panel 10 and includes at least one light emitting assembly and at least one drive group 201. Each drive group 201 is connected to at least one light emitting assembly. The distribution circuit 290 includes at least one data transmission path and is connected to at least one drive group 201. The controller 250 is configured to output backlight drive data to the distribution circuit 290, so that the received backlight drive data is transmitted to the connected drive group 201 through the data transmission path of the distribution circuit 290, so that the drive group 201 drives the connected light emitting assembly to provide backlight. The controller 250 is also configured to output display data to the display panel 10, so that the display panel 10 displays a picture. In one aspect, the controller 250 has the function of calculating and obtaining display data. The calculation and processing capability of the controller 250 with this function is usually very powerful, and there is redundancy in the calculation and processing function. The calculation and obtaining process of the backlight drive data of the backlight controller 250 is performed in the controller 250, which can effectively utilize the calculation and processing function of the controller 250 and improve the effective utilization of calculation resources. On the other hand, the distribution circuit 290 can separate the data transmission and other operations that require high frequency support of the backlight controller 250 for processing, reducing the demand of the controller 250 of the embodiment on the main frequency. The processing process of the distribution circuit 290 and the controller 250 of the embodiment is more targeted, and the joint cost is lower than the cost of the controller 250 which requires high main frequency and data processing power. Therefore, compared with the complex circuit structure of the backlight controller 250, the controller 250 with sufficient calculation capability and the distribution circuit 290 with low cost in the embodiment can ensure the normal display and backlight of the display device, simplify the circuit structure, and reduce the cost without using the high-cost backlight controller 250, thereby expanding the application range of the display device.

[0057] Referring to the circuit structure shown in FIGS. 7 and 8, the data transmission module 291 on the upper side is electrically connected to the drive chip 202 in the first row of the backlight assembly 20, and the data transmission module 291 on the lower side is electrically connected to the drive chip 202 in the second row of the backlight assembly 20. The data transmission module 291 is configured to output a preset number of drive data segments to the drive chip 202 in the connected drive group 201 after obtaining the drive data segments. The distribution circuit 290 obtains the drive data in series based on the SPI bus between the distribution circuit 290 and the controller 250. Different drive groups are electrically connected to different data transmission modules 291. The drive data obtained by the distribution circuit includes a preset number of drive data segments, and the preset number of drive data segments includes at least one drive data segment.

[0058] In some embodiments, the data transmission module in the distribution circuit can transmit data to the driving chips in the driving group connected thereto after obtaining a preset number of driving data segments, which reduces the time delay of data transmission compared with the prior art backlight controller which needs to transmit data to the driving chips after obtaining all the driving data, and improves the synchronization of the backlight assembly light emission and the display panel display.

[0059] In some embodiments, the number of data transmission modules 291 is multiple, the first ends of at least two data transmission modules 291 are electrically connected, the data transmission module 291 is provided with corresponding first identification information, and the first identification information of different data transmission modules 291 connected by the first end is different; the first identification information is used to represent the identity information of the data transmission module 291. Wherein, the data transmission module 291 is configured to receive a preset number of driving data segments based on the first identification information corresponding to the data transmission module 291; the driving data segment includes the first identification information corresponding to the data transmission module 291.

[0060] In some embodiments, the first identification information includes address information, such as: burning address, physical address, wherein the physical address can be the physical address of the pin of the packaging structure of the data transmission module 291, and can also be the physical address of other pins electrically connected to the pin of the packaging structure, and can also be the voltage value of the packaging pin electrically connected as the physical address information.

[0061] In some embodiments, the first end 297 of the distribution circuit 290 includes an SPI interface, and the distribution circuit 290 is electrically connected to the SPI interface of the controller 250 through the first end 297. In some embodiments, the internal circuit connection relationship of the distribution circuit 290 is shown in FIG. 9, and the first end of the data transmission module 291 is electrically connected to the first end 297 of the distribution circuit. Through the above process, the first ends of at least two data transmission modules in the multiple data transmission modules are electrically connected, which can reduce the number of wires in the distribution circuit and reduce the production cost.

[0062] In some embodiments, the distribution circuit 290 further includes a data receiving module 295, and the data receiving module 295 is provided with at least one output end. In some embodiments, referring to the circuit structure shown in FIG. 10, the data receiving module 295 is provided with one output end. The input end of the data receiving module 295 and the first end 297 of the distribution circuit 290 are electrically connected, the output end of the data receiving module 295 and the first end of the data transmission group corresponding to the output end are electrically connected, the data transmission group includes at least two data transmission modules 291 connected by the first end, the first end of the data transmission module 291 and the first end of the data transmission group are electrically connected; different data transmission groups corresponding to different output ends of the data receiving module 295 are electrically connected;

[0063] In some embodiments, the data receiving module 295 is configured to output the drive data segment to the plurality of data transmission groups in accordance with the preset data transmission sequence, and the drive data segment includes the first identification information corresponding to the at least two data transmission modules 291 in parallel in the data transmission group.

[0064] In some embodiments, referring to the circuit structure shown in FIG. 11, the data receiving module 295 is provided with a plurality of output terminals, the plurality of data transmission groups and the plurality of output terminals are electrically connected, and each output terminal is electrically connected to only one data transmission group. The data receiving module 295 sequentially transmits the drive data segment to the plurality of data transmission groups in accordance with the sequence. At this time, the first identification information in the drive data segment received by each data transmission group can be reused. For example, the first data transmission group includes two data transmission modules 291 in parallel, and the first identification information set respectively is 01 and 02. The second data transmission group includes two data transmission modules 291 in parallel, and the first identification information set respectively is also 01 and 02. Since the two output terminals of the data receiving module 295 are respectively connected to the first data transmission group and the second data transmission group, the drive data segment is transmitted separately, and therefore the same first identification information will not cause the data transmission modules in different data transmission groups to obtain mixed data.

[0065] In some embodiments, in the distribution circuit, the data receiving module is arranged between the controller and the plurality of data transmission modules, and can distribute the drive data received by the distribution circuit among the plurality of data transmission modules in accordance with the preset data transmission sequence. The controller only needs to distribute the drive data for each distribution circuit, which can reduce the distribution workload of the controller on the drive data and improve the drive data distribution efficiency of the display device.

[0066] In some embodiments, the number of data transmission modules 291 is a plurality, and the distribution circuit 290 further includes a data receiving module 295. The data receiving module 295 is provided with a plurality of output terminals. In the distribution circuit 290, the input terminal of the data receiving module 295 and the first end of the distribution circuit 290 are electrically connected, and the output terminal of the data receiving module 295 and a data transmission module 291 corresponding to the output terminal are electrically connected. The data transmission modules 291 electrically connected to different output terminals of the data receiving module 295 are different. The data receiving module 295 is configured to output the drive data segment to the plurality of data transmission modules 291 in accordance with the preset data transmission sequence.

[0067] In some embodiments, each data transmission module 291 is provided with corresponding first identification information, the first identification information is included in the driving data segment acquired by the data receiving module 295, and the data receiving module 295 outputs the corresponding driving data segment from the corresponding output end based on the first identification information and the preset data transmission sequence.

[0068] In some embodiments, the plurality of output ends of the data transmission module and the plurality of output ends of the plurality of data transmission modules are electrically connected correspondingly, the data transmission module electrically connected to each output end is different, and the data transmission module can output the received driving data in parallel, thereby improving the efficiency of driving data transmission.

[0069] In some embodiments, the data transmission module 291 is provided with a corresponding first delay time. The data transmission module 291 is configured to output the driving data segment obtained by the data transmission module 291 after the first delay time corresponding to the data transmission module 291 elapses from the initial time corresponding to the frame start signal. The first delay time is determined based on the light-emitting scanning delay time of the liquid crystal molecules corresponding to the light-emitting unit group connected to the data transmission module 291, so that the light-emitting unit group emits light when the liquid crystal molecules are deflected to a preset angle, thereby ensuring the accuracy of the liquid crystal molecule display pixel.

[0070] In some embodiments, the accurate transmission time of each data transmission module is determined through the corresponding first delay time of each data transmission module, so as to determine the light-emitting time of the light-emitting unit group driven by the driving chip corresponding to the data transmission module. The light-emitting unit group in the backlight assembly can emit light with a delay, which is consistent with the scanning sequence of the liquid crystal molecules corresponding to the light-emitting unit group in the display panel, thereby ensuring the accuracy of the display picture of the display device.

[0071] In some embodiments, the data transmission module 291 is configured to output the driving data segment after receiving the driving data segment of the preset length, so as to prevent the incomplete output of the driving data segment to be displayed due to the slow receiving speed of the data transmission module 291. In some embodiments, the data transmission module 291 stores the driving data segment in the register 294 electrically connected thereto when the receiving of the driving data segment is not completed. In some embodiments, the connection relationship between the register 294 and the data transmission module 291 is shown in FIGS. 9, 10 and 11.

[0072] In some embodiments, the plurality of data transmission modules 291 includes at least two first data transmission modules, the first delay time corresponding to different first data transmission modules is different, and the light-emitting time of the light-emitting unit group driven by the driving group electrically connected to the first data transmission module is different. The controller 250 can transmit the driving data segment to the plurality of first data transmission modules based on the different first delay times, so that the first data transmission module can reduce the storage time of the driving data segment stored in the register 294 as much as possible.

[0073] In some embodiments, only a plurality of first data transmission modules are included in the distribution circuit 290, the controller 250 can output the corresponding driving data segment one by one based on the first delay time length corresponding to each first data transmission module, so that the first data transmission module can achieve immediate receiving and transmitting of the driving data.

[0074] Referring to the waveform diagram shown on the left side of FIG. 12, according to the first-in-first-out rule, in a frame display period, the time for the liquid crystal molecules corresponding to the first data transmission module 1 to complete the first preset angle deflection is earlier than the time for the liquid crystal molecules corresponding to the first data transmission module 2 to complete the second preset angle deflection, and thus the time for the first data transmission module 1 to output the driving data segment is earlier than the time for the first data transmission module 2 to output the driving data segment. In some embodiments, the frame start signal can be a vertical synchronization signal Vsync.

[0075] Based on the waveform diagram shown on the left side of FIG. 12, the first delay time length corresponding to the first data transmission module 1 is d1, the first delay time length corresponding to the first data transmission module 2 is d2, and d2>d1, thus after the first delay time length d1 from the vertical synchronization signal Vsync is obtained by the distribution circuit 290, the first data transmission module 1 outputs the driving data segment obtained thereby; after the first delay time length d2 from the vertical synchronization signal Vsync is obtained, the first data transmission module 2 outputs the driving data segment obtained thereby.

[0076] In some embodiments, the first delay time lengths set by the at least two first data transmission modules in the distribution circuit are different, which can stagger the time length for the first data transmission modules to obtain the driving data, without the need to set a large-capacity storage unit in the distribution circuit to ensure consistency of the delay time length, thereby improving the utilization rate of the storage unit, reducing the capacity of the storage unit, and reducing the cost.

[0077] In some embodiments, the data transmission module 291 is provided with a corresponding second delay time length. The controller is configured to output the driving data segment corresponding to the first data transmission module after the second delay time length corresponding to the first data transmission module is elapsed from the initial time corresponding to the frame start signal; the second delay time length corresponding to the first data transmission module is determined based on the first delay time length corresponding to the first data transmission module and a transmission time length of the driving data segment, and the transmission time length is the time length for the controller to transmit the driving data segment from the controller to the first data transmission module. In some embodiments, the second delay time length is the difference between the first delay time length and the transmission time length.

[0078] In some embodiments, the controller determines the second delay time length for transmitting data to each data transmission module based on the first delay time length set by the data transmission module and the data transmission time length, and regulates the transmission time of the driving data corresponding to each data transmission module by the controller, which can improve the utilization rate of the computing power of the controller, simplify the operation logic of the distribution circuit, and ensure the low cost of the display device.

[0079] In some embodiments, the plurality of data transmission modules 291 includes at least two second data transmission modules, and the first delay time length corresponding to different second data transmission modules is the same, and the light-emitting time length of the light-emitting unit group driven by the drive group to which the second data transmission module is electrically connected is the same.

[0080] In some embodiments, the first delay time length corresponding to at least two second data transmission modules in the distribution circuit is the same, so as to reduce the number of distribution circuits for simultaneously transmitting driving data to the drive chips connected to the light-emitting unit group that emits light at the same time, which helps to improve the concentration of the controller in transmitting data to the distribution circuit at different light-emitting time.

[0081] In some embodiments, the controller 250 outputs the driving data to the distribution circuit 290 based on a serial transmission protocol (such as the SPI protocol), and when the distribution circuit 290 includes a plurality of second data transmission modules, the distribution circuit 290 outputs the driving data segments to each second data transmission module in a predetermined order in sequence, each second data transmission module stores the driving data segments in the register 294 one by one, and after the last second data transmission module in the predetermined order receives the driving data segments, the plurality of second data transmission modules uniformly output the driving data segments.

[0082] Then, referring to the waveform diagram shown on the right side of FIG. 12, in a frame display period, the time at which the liquid crystal molecules corresponding to the second data transmission module 1 complete the third preset angle deflection is the same as the time at which the liquid crystal molecules corresponding to the second data transmission module 2 complete the fourth preset angle deflection, or the time difference is within a preset time range, which can be ignored, and thus the time at which the second data transmission module 1 outputs the driving data segment is the same as the time at which the second data transmission module 2 outputs the driving data segment.

[0083] In some embodiments, the second data transmission module is provided with a corresponding third delay time length, and the third delay time length is the delay time length of the second data transmission module for receiving the driving data. The second data transmission module is configured to start receiving the driving data segment after the third delay time length corresponding to the second data transmission module after the initial time corresponding to the frame start signal, and different second data transmission modules correspond to different third delay time lengths. In some embodiments, the frame start signal can be a vertical synchronization signal Vsync.

[0084] Based on the waveform diagram shown on the right side of FIG. 12, the first delay time length corresponding to the second data transmission module 1 is d1, the first delay time length corresponding to the second data transmission module 2 is d2, and d2=d1. In order to adapt to the serial transmission protocol, the time at which the second data transmission module 1 receives the driving data segment is set to be earlier than the time at which the second data transmission module 2 receives the driving data segment. Taking the vertical synchronization signal Vsync as a reference, the third delay time length d3 is the delay time length of the second data transmission module 1 receiving the driving data segment, the third delay time length d4 is the delay time length of the second data transmission module 2 receiving the driving data segment, and d3<d4.

[0085] Therefore, the second data transmission module 1 receives the driving data segment at time t1 after the third delay time length d3 from the vertical synchronization signal Vsync, stores the driving data segment in the register 294, the second data transmission module 2 receives the driving data segment at time t2 after the third delay time length d4 from the vertical synchronization signal Vsync, and stores the driving data segment in the register 294; the two second data transmission modules 2 simultaneously output the driving data segment at time t3 after the first delay time length d1 from the vertical synchronization signal Vsync.

[0086] In some embodiments, the second data transmission module is provided with a corresponding third delay time length, the data received by the second data transmission module which simultaneously outputs the driving data is set to have different third delay time lengths, so as to perform time-sharing transmission of data, adapt to the transmission logic applied in the display device, and avoid adjusting the data transmission logic between the controller and the distribution circuit. In addition, the low number of terminals of the controller outputting the driving data can be guaranteed, so as to guarantee the low cost of the display device.

[0087] When there are multiple distribution circuits 290 in the display device, the second preset delay time length set by the data receiving module 291 which transmits the data with the same bit in the backlight driving data in different distribution circuits 290 can be the same, and only the first preset delay time length in different distribution circuits 290 needs to be set. It is worth noting that the delay rules of the light emitting components corresponding to the distribution circuit 290 are the same.

[0088] For example, when the backlight assembly 20 includes 6 rows of light emitting assemblies, the backlight assembly 20 is scanned from top to bottom and from left to right row by row, the backlight assembly 20 is connected with two distribution circuits 290, wherein the first distribution circuit 290 transmits backlight driving data corresponding to the first row, the third row and the fifth row partition, and the second distribution circuit 290 transmits backlight driving data corresponding to the second row, the fourth row and the sixth row. Three data receiving modules 291 are arranged in each distribution circuit 290, and each data receiving module 291 corresponds to a row partition. Therefore, the second preset delay time length set by the data receiving modules 291 corresponding to the first row and the second row is the same, the fifth preset delay time length set by the data receiving modules 291 corresponding to the third row and the fourth row is the same, and the second preset delay time length set by the data receiving modules 291 corresponding to the fifth row and the sixth row is the same. Therefore, only the first preset delay time length set by the first distribution circuit 290 is shorter than the first preset delay time length set by the second distribution circuit 290.

[0089] In addition, when a single distribution circuit performs data transmission, it needs to be connected with all drive ICs, that is, the distribution circuit and all drive ICs need to be arranged on one lamp panel, which leads to a too large lamp panel size and is not conducive to wiring and installation. Through the above process, a plurality of distribution circuits are arranged in the display device, and each distribution circuit is connected with part of the drive ICs, which can effectively reduce the size of the lamp panel, save costs and facilitate engineering installation.

[0090] In some embodiments, the distribution circuit 290 further includes a temperature sampling unit, the temperature sampling unit is electrically connected with the first end of the distribution circuit 290, and the temperature sampling unit is configured to sample temperature information and output a temperature sampling signal to the controller 250. Through the above process, the temperature sampling unit is arranged in the distribution circuit to sample the temperature of the backlight assembly, without the need for an additional temperature sensor in the backlight assembly, thereby simplifying the circuit structure of the backlight assembly and reducing the installation cost.

[0091] Specifically, as mentioned above, currently, the backlight driver is mainly relied on to obtain processing data associated with the backlight brightness data, and the driving data is generated and output in combination with the processing data. However, due to hardware limitations, the backlight controller cannot be arranged on the lamp panel together with the backlight assembly, and therefore, the traditional way of collecting the temperature of the backlight assembly mainly includes arranging a temperature collection program in the backlight assembly, collecting the temperature by the backlight assembly itself, and returning the collected temperature to the backlight driver. However, due to the low power consumption of the backlight assembly, the backlight assembly cannot perform the driving task during the collection and return of the temperature, thereby prolonging the time for the display device to obtain the backlight brightness data.

[0092] The distribution circuit in the embodiment of the present application can be arranged on the lamp panel. By arranging a temperature sampling unit in the distribution circuit, the temperature collection operation of the backlight assembly is completed by the distribution circuit itself, so that the backlight assembly does not need to stop performing its driving task to collect temperature, thereby improving the rate of the display device in acquiring backlight brightness data.

[0093] Next, referring to the circuit structure shown in FIG. 13, in some embodiments, the distribution circuit 290 comprises a synchronization module 293, the input end of the synchronization module 293 is electrically connected with the first end of the distribution circuit 290, and the output end of the synchronization module 293 is electrically connected with each data transmission module 291. The synchronization module 293 is configured to receive a frame start signal and transmit the frame start signal to each data transmission module to control the transmission time of the connected data transmission module 291.

[0094] In some embodiments, a fourth delay duration of the current distribution circuit 290 is set in the synchronization module 293. After obtaining the frame start signal, the synchronization module 293 outputs a reference signal to each data transmission module from a reference time after the fourth delay duration, and the reference time is the sum of the time when the frame start signal is obtained and the fourth delay duration.

[0095] A fifth delay duration of the data transmission module relative to the reference time is set in each data transmission module 291, and the data transmission module outputs a driving data segment after the fifth delay duration after obtaining the reference signal. The first delay duration set by the data transmission module 291 is the sum of the fifth delay duration set by the data transmission module 291 and the fourth delay duration set by the synchronization module 293 connected with the data transmission module 291.

[0096] When there are multiple distribution circuits 290 in the display device, the fifth delay time set by the data transmission modules that transmit the same bit of driving data in different distribution circuits 290 can be the same, and only the fourth delay time in different distribution circuits 290 needs to be set. It is worth noting that the delay rules of the light emitting unit groups driven by the distribution circuit 290 are the same.

[0097] For example, when the backlight assembly comprises 6 rows of light emitting unit groups, the backlight assembly 20 scans from top to bottom and from left to right row by row, and the backlight assembly 20 is electrically connected with two distribution circuits 290. The first distribution circuit corresponds to the first row, the third row and the fifth row, and the second distribution circuit corresponds to the second row, the fourth row and the sixth row. Three data transmission modules are set in the distribution circuit, and each data transmission module corresponds to a row of partitions. The fifth delay time set by the data transmission modules corresponding to the first row and the second row is the same, the fifth delay time set by the data transmission modules corresponding to the third row and the fourth row is the same, and the fifth delay time set by the data transmission modules corresponding to the fifth row and the sixth row is the same. Only the fourth delay time set by the first distribution circuit needs to be shorter than the fourth delay time set by the second distribution circuit.

[0098] When the number of distribution circuits 290 is multiple, there are multiple connection modes between the distribution circuits 290, which will be further explained below. In some embodiments, referring to the circuit structure shown in FIG. 14, at least two distribution circuits 290 are cascaded through a communication bus, wherein the first distribution circuit 290 is electrically connected to the communication interface of the controller 250 through the communication bus, that is, the input end DIN of the first distribution circuit 290 is electrically connected to the communication interface of the controller 250 through the communication bus, and the input end DIN of the non-first distribution circuit 290 is electrically connected to the output end DOUT of the previous distribution circuit 290. Through the above process, the cascaded distribution circuits can reduce the number of communication ports of the controller electrically connected to the distribution circuits, and can reduce the cost of the controller.

[0099] In some embodiments, the communication bus is configured to transmit driving data in a first direction, and the first direction is from the controller 250 to the last distribution circuit 290 in the cascaded distribution circuits 290. In this way, the communication bus can set the transmission order of the driving data between the distribution circuits, so that the controller can set the corresponding driving data based on the transmission order to ensure the accuracy of the display.

[0100] In some embodiments, the data transmission module 291 is configured to obtain state information of the light emitting unit group electrically connected to the driving chip 202 from the driving chip 202. The state information is used to represent the power-on state of the light emitting unit group driven by the driving group 201 connected to the data transmission module 291.

[0101] In some embodiments, the distribution circuit 290 includes a register 294, the register 294 is electrically connected to the data transmission module 291 in the distribution circuit 290, and the register 294 is configured to store register information, the register information includes the state information obtained by the data transmission module 291 from the driving group 201 connected thereto. The first end of the distribution circuit 290 is electrically connected to the register 294, and the first end of the distribution circuit 290 is electrically connected to the communication bus. The communication bus is further configured to transmit the register information in a second direction, and the second direction is from the last distribution circuit 290 in the cascaded distribution circuits 290 to the controller 250.

[0102] In some embodiments, the register in the distribution circuit can store the setting information of the distribution circuit, and can also store the state information obtained by the driving group connected to the data transmission module. When the controller needs to regulate the operation of the display device based on the above information, the register can be read in time to ensure the timeliness of the control.

[0103] In some embodiments, referring to the circuit structure shown in FIG. 15, the at least one distribution circuit 290 is connected in cascade to form a distribution group, each distribution group includes different distribution circuits 290, and at least two distribution groups are connected in parallel. In the circuit structure shown in FIG. 15, two distribution groups are included, and each distribution group includes two distribution circuits 290 connected in cascade. The first end of the first distribution circuit 290 in each parallelly connected distribution group is electrically connected, and the connection points of the at least two distribution groups are electrically connected through the communication bus and the communication interface of the controller 250. When each distribution group includes one distribution circuit 290, the distribution circuits 290 are connected in parallel, and the connection manner is shown in FIG. 16.

[0104] In some embodiments, in each distribution group, the number of driving chips 202 connected to each distribution circuit 290 is the same, so that the length of the driving data segment transmitted by each distribution circuit 290 is the same, which is convenient for control. In other embodiments, in each distribution group, the number of driving chips 202 connected to each distribution circuit 290 is not completely the same, so that the number difference between the number of output ends of the driving chips 202 connected to the distribution group and the number of light emitting unit groups is less than a preset number difference, preventing the driving force of the distribution group from being too redundant. Parallel connection of the distribution circuits can improve the transmission speed of the controller to the backlight assembly, which helps to improve the frame rate of the display device, thereby improving the display quality.

[0105] In some embodiments, in each parallelly connected distribution group, at least one distribution circuit 290 is provided with a gating end, the at least one distribution circuit 290 provided with the gating end includes the first distribution circuit 290 in the distribution group, and the gating end is electrically connected to the control end of the controller 250. In the connection relationship shown in FIG. 16 and FIG. 15, the control end is the B end; not shown in the figure is that, in some embodiments, the control end includes a first control end B1 end and a second control end B2 end. The controller 250 is configured to output a gate signal from the control end and output driving data from the communication interface; wherein the gate signal includes second identification information, the second identification information corresponding to the distribution circuits 290 in different driving groups 201 is different, and the second identification information is used to represent the identity information of each driving group 201, such as address information. The distribution circuit 290 electrically connected to the control end of the controller 250 is configured to obtain the driving data, output the driving data when the distribution circuit 290 corresponding gate signal is obtained, and not output the driving data when the distribution circuit 290 corresponding gate signal is not obtained.

[0106] In the connection relationship shown in FIG. 16 and FIG. 15, the parallel distribution circuits 290 are all electrically connected with the same control end B of the controller 250, for saving the number of control ends, and each driving group 201 can only be selected one by one to obtain the driving data. In the above connection relationship, the parallel distribution circuits 290 are electrically connected with the first control end B1 and the second control end B2 of the controller 250, for improving the data transmission efficiency, and multiple driving groups 201 can be selected simultaneously to obtain the driving data.

[0107] In some embodiments, at least one distribution circuit in the parallel distribution group is provided with a selection end, and a selection signal transmitted through the selection end determines whether to receive the driving data sent by the controller, so that the accuracy of driving data transmission can be ensured on the basis of saving the number of communication ports of the controller.

[0108] In some embodiments, the driving group 201 includes multiple distribution circuits 290 provided with selection ends, and the multiple distribution circuits 290 provided with selection ends in the same driving group 201 correspond to the same second identification information. Referring to the circuit structure shown in FIG. 15, the corresponding second identification information of the two distribution circuits 290 in the first row is the same when both of them are provided with selection ends.

[0109] In some embodiments, when the driving group includes multiple distribution circuits provided with selection ends, the standardization production of the distribution circuits can be realized, and there is no need to distinguish the positions of different distribution circuits, thereby reducing the production cost. In the same driving group, the corresponding second identification information of the distribution circuits is the same, and the complexity of the regulation and control logic can be reduced.

[0110] In some embodiments, the display device further includes a power supply circuit 13, the power supply circuit 13 and the display panel 10, the controller 250, and the light emitting unit group in the backlight assembly 20 are electrically connected, and are configured to provide a power supply signal; the power supply signal includes a first power supply signal for supplying power to the light emitting unit group. The distribution circuit 290 includes a voltage control module 292, an input end of the voltage control module 292 and at least one data transmission module 291 in the distribution circuit 290 are electrically connected, and an output end of the voltage control module 292 and the power supply circuit 13 are electrically connected. The voltage control module 292 is configured to obtain state information output by the data transmission module 291 connected with the voltage control module 292, and generate a feedback signal at the output end of the voltage control module 292 based on the state information. The feedback signal can be currently output by the voltage control module 292, or can be output from other voltage control modules 292 after being affected by the current voltage control module 292. The power supply circuit 13 is configured to adjust the voltage value of the first power supply signal based on the feedback signal.

[0111] In some embodiments, the distribution circuit also receives state information of the driving chip, and adjusts the voltage value of the first power supply electrical signal of the output of the power supply circuit based on the state information. Since the amount of data of the state information is large, the required main frequency of the device receiving the state information is high. Since the distribution circuit has a high main frequency set for driving data transmission, the transmission requirement of the state information can be supported without increasing the cost. The distribution circuit separates the voltage adjustment process from the controller, reduces the requirement of the main frequency of the controller, and reduces the cost of the display device.

[0112] In some embodiments, referring to the circuit structure shown in FIG. 17, the voltage control module 292 includes an adjustment module 2921. The input end of the adjustment module 2921 is electrically connected with at least one data transmission module 291 in the distribution circuit 290, and the output end of the adjustment module 2921 is electrically connected with the output end of the voltage control module 292.

[0113] The adjustment module 2921 is configured to obtain, from the connected data transmission module 291, state information of the light emitting unit group fed back by the driving group to which the data transmission module 291 is electrically connected. The state information includes an under-voltage state or an over-voltage state. When the light emitting unit group is in the under-voltage state, it indicates that the actual current value flowing through the light emitting unit group is lower than a predetermined current value. When the light emitting unit group is in the over-voltage state, it indicates that the actual current value flowing through the light emitting unit group is not lower than the predetermined current value. When the state information includes at least one under-voltage state, a first control electrical signal is output. When the state information only includes an over-voltage state, a second control electrical signal is output. The values of the first control electrical signal and the second control electrical signal are different. The feedback signal is determined based on the first control electrical signal or the second control electrical signal.

[0114] In some embodiments, in the voltage control module, the adjustment module determines the power-on state of the light emitting unit group based on the state information sampled by the connected data transmission module, generates different control electrical signals based on different power-on states, and determines different feedback signals at the output end of the voltage control module to adjust the voltage value of the first power supply electrical signal output by the power supply circuit. The above adjustment process is simple in logic, and the distribution circuit does not require high computing power, thereby ensuring the low cost of the display device.

[0115] In some embodiments, when the display device includes one distribution circuit 290, the distribution circuit 290 includes one voltage control module 292, and the output end of the adjustment module 2921 is electrically connected with the output end of the voltage control module 292. The control electrical signal output by the adjustment module 2921 is the feedback signal, and the control electrical signal is the first control electrical signal or the second control electrical signal.

[0116] In some embodiments, the number of voltage control modules in the display device is one, and the voltage control module only needs to consider the state information sampled by the connected data transmission module to generate a feedback signal, without considering the influence of the output signals of other voltage control modules, thereby simplifying the voltage regulation logic of the power supply circuit.

[0117] In some embodiments, the voltage value of the first control electrical signal is different from the voltage value of the second control electrical signal, the display device includes a plurality of distribution circuits 290, and the voltage control module 292 included in the distribution circuit 290 is at least one, and the number of voltage control modules 292 included in the display device is a plurality, and the output ends of the plurality of voltage control modules 292 are electrically connected.

[0118] When two distribution circuits 290 are connected in cascade, the connection mode of the two distribution circuits 290 and the voltage control modules 292 inside them is as shown in FIG. 18. The communication interface 298 of the first distribution circuit (the upper distribution circuit 290) and the communication interface 297 of the second distribution circuit (the lower distribution circuit 290) are electrically connected to transmit driving data. The output end of the voltage control module 292 of the second distribution circuit and the receiving end of the voltage control module 202 of the first distribution circuit are electrically connected. The receiving end of the voltage control module 202 is electrically connected to the output end of the voltage control module 202 through internal wiring. The output end of the voltage control module 292 of the second distribution circuit and the output end of the voltage control module 202 of the first distribution circuit are in a parallel connection. When two distribution circuits 290 are connected in parallel, the output ends of the voltage control modules 292 inside the two distribution circuits 290 are connected in parallel.

[0119] Continuing to refer to the circuit structure shown in FIG. 18, the voltage control module 292 further includes a controllable switching device 2922. The first end of the controllable switching device 2922 and the output end of the regulation module 2921 are electrically connected. The second end of the controllable switching device 2922 and the output end of the voltage control module 292 are electrically connected. The controllable switching device 2922 is configured to be turned on when the connected regulation module 2921 outputs the first control electrical signal, and output a feedback signal based on the first control electrical signal. The controllable switching device 2922 is turned off when the connected regulation module 2921 outputs the second control electrical signal, and at least one other voltage control module 292 electrically connected to the voltage control module 292 where the controllable switching device 2922 is located outputs the first control electrical signal. The controllable switching device 2922 is turned on when the connected regulation module 2921 outputs the second control electrical signal, and all the other voltage control modules 292 electrically connected to the voltage control module 292 where the controllable switching device 2922 is located output the second control electrical signal, and output a feedback signal based on the second control electrical signal.

[0120] In some embodiments, a controllable switching device is arranged in the voltage control module and is electrically connected in series between the output of the voltage control module and the output of the regulation module. The on-off state of the controllable switching device is regulated based on the control electrical signal output by the regulation module and the control electrical signal output by the other voltage control module, so as to determine the feedback signal transmitted to the power supply circuit. The determination of the feedback signal is realized based on the circuit structure composed of the controllable switching device, without the need to arrange an additional processor in the distribution circuit to operate the feedback signal, thereby ensuring the low cost of the distribution circuit.

[0121] In some embodiments, the feedback signal includes a feedback voltage value, which is determined based on the voltage value of the first control electrical signal or the second control electrical signal transmitted when the controllable switching device 2922 is turned on. In some embodiments, when the on-voltage of the controllable switching device is less than the product of the voltage value of the control electrical signal and a preset proportion, the feedback voltage value is the voltage value of the control electrical signal output by the controllable switching device, wherein the control electrical signal output by the controllable switching device includes the first control electrical signal or the second control electrical signal. Since the on-voltage of the controllable switching device is less than the product of the voltage value of the control electrical signal and the preset proportion, the on-voltage drop of the controllable switching device is negligible compared to the voltage value of the control electrical signal. Therefore, the calculation of the feedback voltage value can be simplified by not considering the voltage value of the control electrical signal, thereby improving the calculation efficiency.

[0122] In some embodiments, when the on-voltage of the controllable switching device is greater than or equal to the product of the voltage value of the control electrical signal and the preset proportion, the feedback voltage value is the sum of the voltage value of the control electrical signal output by the controllable switching device and the on-voltage of the controllable switching device, wherein the control electrical signal output by the controllable switching device includes the first control electrical signal or the second control electrical signal. Since the on-voltage of the controllable switching device is greater than or equal to the product of the voltage value of the control electrical signal and the preset proportion, the on-voltage drop of the controllable switching device will affect the calculation accuracy of the voltage value of the control electrical signal. Therefore, the calculation of the feedback voltage value can ensure the accurate adjustment of the output voltage value of the power supply circuit by considering the voltage value of the control electrical signal.

[0123] FIG. 19 is an equivalent schematic diagram of a distribution circuit including a controllable switching device. The equivalent schematic diagram of the regulation module 2921 is a voltage source. The regulation module 2921 is configured to, after feeding back the state information from the corresponding data transmission module, perform logical operation based on the state information to determine the power-on state of the light emitting unit group corresponding to the data transmission module. For example, the feedback state information indicates overvoltage by 1 and indicates undervoltage by 0. The state information of each subregion is subjected to AND operation. When there is undervoltage in at least one light emitting unit group, 0 is output, otherwise, 1 is output. Based on the output result, the output electrical signal is determined: when the logical operation result is 0, the first control electrical signal is output; and when the logical operation result is 1, the second control electrical signal is output.

[0124] In some embodiments, the voltage value of the first control electrical signal is less than the voltage value of the second control electrical signal, and the voltage value of the second control electrical signal is a default voltage value. When the regulating module 2921 outputs the first control electrical signal, the corresponding controllable switching device 2922 is turned on, and the voltage value at the input end of the controllable switching device 2922 is pulled down. The power supply circuit 13 is a circuit based on the voltage value as a negative feedback signal, and the voltage value at the output of the power supply circuit 13 is increased based on the pulled-down voltage value.

[0125] Since the output ends of the controllable switching devices 2922 are connected in parallel, when at least one controllable switching device 2922 outputs the first control electrical signal, the voltage value obtained by the power supply circuit 13 is determined based on the first control electrical signal and the turn-on voltage of the controllable switching device 2922. When each controllable switching device 2922 outputs the second control electrical signal, the voltage value obtained by the power supply circuit 13 is determined based on the second control electrical signal and the turn-on voltage of the controllable switching device 2922. In some embodiments, the controllable switching device can be a diode, the anode of the diode serving as the input end and the cathode serving as the output end. In other embodiments, the controllable switching device can be a P-type TFT device, and the control end of the device is electrically connected to the output end of the controllable switching device.

[0126] In some embodiments, in a display device, a plurality of controllable switching devices jointly determine the feedback voltage value of the feedback signal transmitted to the power supply circuit based on the first control electrical signal and / or the second control electrical signal with different voltage values, so as to regulate the voltage value of the first power supply electrical signal output by the power supply circuit. The control variable is single, the control logic is simple, and the low-cost design of the distribution circuit structure is facilitated.

[0127] In some embodiments, the current value of the first control electrical signal is different from the current value of the second control electrical signal, and the feedback signal is an electrical signal determined based on the current value of the control electrical signal.

[0128] In some embodiments, the voltage control module 292 further includes a processing module 2923, the output end of the regulating module 2921 is electrically connected to the input end of the processing module 2923, and the output end of the processing module 2923 is electrically connected to the control end of the power supply circuit 13. The processing module 2923 is configured to determine a feedback current value based on the current value of the control electrical signal output by the regulating module 2921, so as to generate a feedback signal, wherein the feedback signal includes the feedback current value. In some embodiments, a processing module is arranged in the voltage control module, and is connected in series between the output end of the regulating module and the control end of the power supply circuit. The processing module determines a feedback current value based on the current value of the different control signals, so as to adapt to the current feedback regulation of the power supply circuit.

[0129] In some embodiments, the display device includes a plurality of voltage control modules 292, the plurality of voltage control modules 292 including a first voltage control module and a second voltage control module. An output terminal of the first voltage control module and an input terminal of the processing module 2923 in the second voltage control module are electrically connected. The processing module 2923 in the second voltage control module is configured to obtain a first feedback signal output by the first voltage control module, obtain a control electrical signal output by the regulation module 2921 in the second voltage control module, determine a second feedback current value based on a current value of the control electrical signal and a feedback current value of the first feedback signal, and output a second feedback signal; the second feedback signal includes the second feedback current value. When the two distribution circuits 290 are connected in cascade, the communication interface 298 of the first distribution circuit (the distribution circuit 290 located on the upper side) and the communication interface 297 of the second distribution circuit (the distribution circuit 290 located on the lower side) are electrically connected to transmit driving data, an output terminal of the voltage control module 292 of the second distribution circuit and a receiving terminal of the voltage control module 202 of the first distribution circuit are electrically connected, the receiving terminal of the voltage control module 202 of the first distribution circuit and another output terminal of the processing module 2923 in the voltage control module 202 are electrically connected, and the processing module 2923 in the voltage control module 202 of the first distribution circuit processes a feedback signal output by the first distribution circuit and a control electrical signal generated by the first distribution circuit, and outputs the feedback signal to the power supply circuit. In addition, when the two distribution circuits 290 are connected in parallel, the feedback signal output by the first distribution circuit can also be transmitted to the second distribution circuit, and the second distribution circuit outputs a final feedback signal to the power supply circuit 13. Through the above process, when generating the feedback signal, the plurality of voltage control modules not only considers the control electrical signal generated by the regulation module included therein, but also considers the feedback signal output by the other voltage control module electrically connected to the input terminal, and in the voltage control modules connected in cascade, the voltage value of the final feedback signal is determined by step-by-step operation, so that the operation process is dispersed in each voltage control module, the simple control logic of the processing module in the voltage control module is guaranteed, and each voltage control module is directly electrically connected, without occupying the transmission bandwidth of the communication bus between each distribution circuit, so that the voltage adjustment of the power supply circuit is faster.

[0130] In some embodiments, the processing module 2923 in the second voltage control module is configured to select a target electrical signal from the control electrical signal and the first feedback signal as the second feedback signal based on the current value of the control electrical signal and the feedback current value of the first feedback signal.

[0131] Fig. 20 is an equivalent schematic diagram of the distribution circuit including controllable switching devices, an equivalent schematic diagram of the control module 2921 is a current source, the control module 2921 is configured to perform logical operation based on the state information fed back from the corresponding data transmission module to determine the power-on state of the light emitting unit group corresponding to the data transmission module. For example, 1 in the fed-back state information represents overvoltage, and 0 represents undervoltage. The logical operation is performed on the state information of each subregion, and 0 is output when there is undervoltage in at least one light emitting unit group, otherwise, 1 is output. Based on the output result, the output electrical signal is determined: when the logical operation result is 0, the first control electrical signal is output; when the logical operation result is 1, the second control electrical signal is output.

[0132] In some embodiments, the current value of the first control electrical signal is smaller than the current value of the second control electrical signal, and the processing module 2923 outputs the control electrical signal as the feedback signal when the control electrical signal is obtained; the processing module 2923 selects the control electrical signal with the smallest current value from the plurality of control electrical signals as the feedback signal when the plurality of control electrical signals are obtained.

[0133] In some embodiments, the processing module determines the target electrical signal that most needs to be adjusted in power-on state from the control electrical signal and the received feedback signal through a preset screening mechanism, and adjusts the feedback signal to adjust the power supply circuit, so that the power-on state of other light emitting unit groups is also adjusted in the process of adjusting the power-on state of the target electrical signal corresponding to the light emitting unit group, and the light emitting unit groups of the backlight assembly all meet the light emitting demand. The above circuit structure can realize effective adjustment of the output voltage of the power supply circuit through simple control logic, which not only improves the adjustment efficiency, but also guarantees the low cost of the distribution circuit.

[0134] In some embodiments, the backlight assembly 20 includes a lamp panel, the lamp panel includes a light emitting unit group and a driving chip 202, and the distribution circuit 290 is arranged on the surface of the lamp panel. The distribution circuit is arranged on the surface of the lamp panel, and can be electrically connected with the driving chip through the inter-board wiring of the lamp panel, without the need to arrange the connecting line between the distribution circuit and the lamp panel, thereby saving the number of circuit boards in the display device and reducing the number of connecting lines, and making the assembly of the display device simpler.

Claims

1. A display device comprising: a controller configured to obtain image data, generate backlight brightness data and display data; a display panel electrically connected with the controller and configured to display a picture based on the display data; a distribution circuit electrically connected with the controller and comprising a plurality of data transmission modules and at least one data receiving module, wherein different data transmission modules are electrically connected with different driving groups; at least one data receiving module configured to output driving data segments to the plurality of data transmission modules in accordance with a preset data transmission sequence; any one of the data transmission modules configured to output the preset number of driving data segments to driving chips in the connected driving group after obtaining the preset number of driving data segments; a backlight assembly arranged on a side away from a display surface of the display panel, the backlight assembly comprising: a plurality of driving groups, the second end of the distribution circuit being electrically connected with the first end of the driving groups; the driving group comprising at least one driving chip electrically connected with the driving group, at least one driving chip configured to obtain the preset number of driving data segments corresponding to the driving chip and output driving signals based on the driving data segments, wherein the driving data segments corresponding to different driving chips are different; a plurality of light emitting unit groups, the driving chip and at least one light emitting unit group being electrically connected, the light emitting unit group being configured to emit light based on the driving signals, wherein the light emitting unit groups electrically connected with different driving chips are different.

2. The display device of claim 1, wherein the data transmission modules are provided with corresponding first identification information, and the first identification information corresponding to different data transmission modules is different; the data transmission module is configured to receive the preset number of driving data segments based on the first identification information corresponding to the data transmission module, and the driving data segments comprise the first identification information corresponding to the data transmission module.

3. The display device of claim 1, wherein the distribution circuit further comprises a data receiving module, and the data receiving module is provided with at least one output end; the input end of the data receiving module is electrically connected with the first end of the distribution circuit, and the output end of the data receiving module is electrically connected with the first end of the corresponding data transmission group of the output end, the data transmission group is electrically connected with at least two data transmission modules, and the data receiving module has different output ends corresponding to the electrically connected data transmission groups.

4. The display device of claim 2, wherein the number of data transmission modules is a plurality, the distribution circuit further comprises a data receiving module, and the data receiving module is provided with a plurality of output ends; The input end of the data receiving module is electrically connected with the first end of the distribution circuit, and the output end of the data receiving module is electrically connected with the corresponding data transmission module of the output end. different data transmission modules are electrically connected with different output ends of the data receiving module; the data receiving module is configured to output driving data segments to the plurality of data transmission modules in accordance with a preset data transmission sequence.

5. The display device of claim 4, wherein the data transmission module is provided with a corresponding first time delay duration. The data transmission module is configured to output the driving data segment obtained by the data transmission module after a first delay time corresponding to the data transmission module elapses from an initial time corresponding to the frame start signal. 6.The display device of claim 5, wherein the plurality of data transmission modules comprises at least two first data transmission modules, and wherein the first delay time corresponding to each of the first data transmission modules is different. 7.The display device of claim 6, wherein the data transmission module is provided with a second delay time corresponding to the data transmission module. The controller is configured to output the driving data segment corresponding to the first data transmission module after a second delay time corresponding to the first data transmission module elapses from an initial time corresponding to the frame start signal. The second delay time corresponding to the first data transmission module is determined based on the first delay time corresponding to the first data transmission module and a transmission time of the driving data segment, and the transmission time is a time for the controller to transmit the driving data segment from the controller to the first data transmission module. 8.The display device of claim 5, wherein the plurality of data transmission modules comprises at least two second data transmission modules, and wherein the first delay time corresponding to each of the second data transmission modules is the same. 9.The display device of claim 8, wherein the second data transmission module is provided with a third delay time corresponding to the second data transmission module, and wherein the second data transmission module is configured to start receiving the driving data segment after a third delay time corresponding to the second data transmission module elapses from an initial time corresponding to the frame start signal, and wherein the third delay time corresponding to each of the second data transmission modules is different. 10.The display device of any one of claims 1 to 5, wherein the data transmission module is further configured to obtain state information from a connected driving group, and wherein the state information is used to represent a power-on state of a light emitting unit group driven by the connected driving group. The display device further comprises a power supply circuit, which is connected to the display panel, the controller, and the light emitting unit group in the backlight assembly, respectively, and is configured to provide a power supply electrical signal, wherein the power supply electrical signal comprises a first power supply electrical signal for supplying power to the light emitting unit group. The distribution circuit further comprises a voltage control module, wherein an input end of the voltage control module is electrically connected to at least one data transmission module in the distribution circuit, and an output end of the voltage control module is electrically connected to the power supply circuit. The voltage control module is configured to obtain state information output by a data transmission module connected to the voltage control module, and generate a feedback signal at the output end of the voltage control module based on the state information. The power supply circuit is configured to adjust a voltage value of the first power supply electrical signal based on the feedback signal. 11.The display device of claim 10, wherein the state information comprises an under-voltage state or an over-voltage state. The voltage control module comprises a regulation module, an input end of the regulation module is electrically connected with at least one data transmission module in the distribution circuit, and an output end of the regulation module is electrically connected with an output end of the voltage control module; The regulation module is configured to: output a first control electrical signal when the state information comprises at least one under-voltage state; output a second control electrical signal when the state information only comprises the over-voltage state; wherein The feedback signal is determined based on the first control electrical signal or the second control electrical signal; the first control electrical signal and the second control electrical signal have different values.

12. The display device according to claim 11, wherein the number of the voltage control modules comprised by the display device is one, the output end of the regulation module is electrically connected with the output end of the voltage control module; The first control electrical signal or the second control electrical signal output by the regulation module serves as the feedback signal.

13. The display device according to claim 11, wherein the voltage value of the first control electrical signal is different from the voltage value of the second control electrical signal; The number of the voltage control modules comprised by the display device is multiple, and the output ends of the multiple voltage control modules are electrically connected; The voltage control module further comprises a controllable switching device, a first end of the controllable switching device is electrically connected with the output end of the regulation module, and a second end of the controllable switching device is electrically connected with the output end of the voltage control module; The controllable switching device is configured to be turned on when the connected regulation module outputs the first control electrical signal, and output the feedback signal based on the first control electrical signal; The controllable switching device is turned off when the connected regulation module outputs the second control electrical signal, and at least one other voltage control module electrically connected with the voltage control module where the controllable switching device is located outputs the first control electrical signal; The controllable switching device is turned on when the connected regulation module outputs the second control electrical signal, and all the other voltage control modules electrically connected with the voltage control module where the controllable switching device is located output the second control electrical signal, and output the feedback signal based on the second control electrical signal.

14. The display device according to claim 13, wherein the feedback signal comprises a feedback voltage value, and the feedback voltage value is determined based on the voltage value of the first control electrical signal or the second control electrical signal transmitted by the turned-on controllable switching device.

15. The display device according to claim 11, wherein the current value of the first control electrical signal is different from the current value of the second control electrical signal; The voltage control module further comprises a processing module; The output end of the regulation module is electrically connected with an input end of the processing module, and an output end of the processing module is electrically connected with a control end of the power supply circuit; The processing module is configured to determine a feedback current value based on the current value of the control electrical signal output by the regulation module, and the feedback signal comprises the feedback current value.

Images