Display device

Abstract

The utility model provides a display device, the display device comprises a display panel, a power supply circuit, a controller and a backlight assembly, the backlight assembly comprises a driving circuit and a lamp panel, the lamp panel comprises lamp beads in array distribution, at least one lamp bead is electrically connected to form a light emitting unit group, the driving circuit comprises at least one driving chip, and the driving chip is electrically connected with the driving circuit. The power supply end of each driving chip is electrically connected with the power supply circuit, each driving end is electrically connected with the plurality of light-emitting unit groups, the plurality of light-emitting unit groups are respectively and correspondingly electrically connected with the plurality of power supply ends, and the driving chips can supply power to the light-emitting unit groups electrically connected with the driving chips according to a preset power supply sequence based on power supply signals provided by the power supply circuit. And corresponding driving signals are output at each driving end based on driving data provided by the controller so as to drive different light-emitting unit groups to generate corresponding light intensity, and the number of the light-emitting unit groups driven by each driving end of the driving chip is multiplied based on the connection relation and the control logic, so that the light intensity of the light-emitting unit groups is increased. The driving capability of a driving chip in the backlight assembly is improved with low cost.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202310280055.1, filed on March 21, 2023, entitled "Drive Chip, Drive Circuit and Display Device", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] Some embodiments of the present application relate to display technology. More specifically, to a display device. BACKGROUND

[0003] The display device is a device for displaying images and / or user interfaces. The display device includes a controller, a display panel, a backlight assembly, the backlight assembly including a drive circuit and a lamp panel, the lamp panel including an array of lamp beads, at least one lamp bead being electrically connected to form a light emitting unit group (partition). The drive circuit drives each partition to emit light.

[0004] With the improvement of the display quality of the display device, the number of partitions on the lamp panel increases, and improving the driving capability of the drive circuit becomes a research focus. UTILITY MODEL CONTENT

[0005] Some embodiments of the present application provide a display device, aiming to solve the technical problem of poor driving capability of the drive circuit in the backlight assembly.

[0006] Some embodiments of the present application provide a display device, the display device comprising:

[0007] a display panel;

[0008] a power supply circuit electrically connected to the display panel;

[0009] a controller electrically connected to the display panel and the power supply circuit;

[0010] a backlight assembly electrically connected to the controller and the power supply circuit, the backlight assembly including a drive circuit and a lamp panel;

[0011] the lamp panel including an array of lamp beads, at least one lamp bead being electrically connected to form a light emitting unit group;

[0012] the drive circuit including at least one drive chip, each drive chip being provided with a power supply end, at least one driving end and a plurality of power supply ends, the power supply end being electrically connected to the power supply circuit, each driving end being electrically connected to a plurality of light emitting unit groups, the plurality of light emitting unit groups being respectively electrically connected to the plurality of power supply ends; wherein different driving ends are electrically connected to different light emitting unit groups.

[0013] In the technical solution, the display device comprises a display panel, a power supply circuit, a controller, and a backlight assembly, the backlight assembly comprises a driving circuit and a lamp panel, the lamp panel comprises lamp beads arranged in an array, at least one lamp bead is electrically connected to form a light-emitting unit group, the driving circuit comprises at least one driving chip, a power supply end of each driving chip is electrically connected to the power supply circuit, each driving end is electrically connected to a plurality of light-emitting unit groups, the plurality of light-emitting unit groups are respectively electrically connected to a plurality of power supply ends, the driving chip can supply power to the light-emitting unit groups electrically connected thereto according to a preset power supply sequence based on a power supply signal provided by the power supply circuit, and can output corresponding driving signals at the driving ends based on driving data provided by the controller, so as to drive different light-emitting unit groups to generate corresponding light intensities, based on the connection relationship and the control logic, the number of light-emitting unit groups driven by each driving end of the driving chip is multiplied, and the driving capability of the driving chip in the backlight assembly is improved at low cost.

[0014] In some embodiments, the display panel comprises liquid crystal molecules arranged in an array, and at least one liquid crystal molecule in the display is arranged to form a liquid crystal molecule group;

[0015] The plurality of light-emitting unit groups electrically connected to the driving chip correspond to a plurality of liquid crystal molecule groups;

[0016] The plurality of light-emitting unit groups electrically connected to each driving chip are arranged in the first scanning direction and the second scanning direction based on the plurality of liquid crystal molecule groups;

[0017] The plurality of liquid crystal molecule groups arranged in the first scanning direction are displayed based on the same phase;

[0018] The plurality of liquid crystal molecule groups arranged in the second scanning direction are displayed based on different phases.

[0019] In some embodiments, the number of arrangements of the plurality of light-emitting unit groups electrically connected to each driving chip in the first scanning direction is the plurality, and the number of arrangements in the second scanning direction is one.

[0020] In the technical solution, the plurality of light-emitting unit groups electrically connected to each driving chip are arranged in a row in the first scanning direction, and the driving chip multiplies the light-emitting unit groups to provide backlight for the plurality of liquid crystal molecule groups displayed in the same phase, thereby not only increasing the driving capability of the driving chip, but also increasing the light-emitting control precision of the driving chip on the light-emitting unit groups.

[0021] In some embodiments, the number of arrangements of the plurality of light-emitting unit groups electrically connected to each driving chip in the second scanning direction is at least two.

[0022] The number of arrangements of the at least two is less than or equal to the number of power supply ends.

[0023] The number of the groups of the plurality of light emitting units electrically connected to the driving end and arranged in the second scanning direction is one.

[0024] In the technical solution, the driving chip controls the groups of the plurality of light emitting units to provide backlight to the rows of liquid crystal molecules in the display panel row by row, or a group of driving chips controls the groups of the plurality of light emitting units to provide backlight to the columns of liquid crystal molecules in the display panel column by column, thereby simplifying the calculation and control of the controller on the row-by-row time delay or column-by-column time delay of the groups of driving chips.

[0025] In some embodiments, the number of the groups of the plurality of light emitting units electrically connected to the driving end and arranged in the second scanning direction is at least two.

[0026] The number of the at least two is less than or equal to the number of the power supply ends.

[0027] In some embodiments, the driving chip is provided with a plurality of power switches and a control unit.

[0028] The input ends of the plurality of power switches are coupled to the power supply end of the driving chip.

[0029] The output ends of the plurality of power switches are connected to the corresponding power supply ends.

[0030] The control unit is electrically connected to the control ends of the plurality of power switches.

[0031] In the technical solution, the plurality of power switches in the driving chip are electrically connected between the power supply end and the corresponding plurality of power supply ends, so that, after obtaining the driving data and the power supply signal, the control unit in the driving chip controls the turn-on sequence of the plurality of power switches based on the driving data, to provide the power supply signal to the corresponding group of light emitting units, thereby ensuring that the groups of light emitting units electrically connected to the driving end of the driving chip emit light one by one in the power supply sequence, and ensuring the control accuracy of the driving chip.

[0032] In some embodiments, when the at least two wires connected between the plurality of groups of light emitting units and the driving chip are bridged, in the bridging area, an insulating layer is coated on the upper side of the bridged wire, and a conductive layer is coated on the upper side of the insulating layer.

[0033] The conductive layer turns on the bridged wire.

[0034] In some embodiments, in the bridging area, the insulating layer is coated on the upper side of the bridged wire along the wire trace of the bridged wire.

[0035] The width of the insulating layer is greater than the width of the bridged wire.

[0036] In some embodiments, the conductive layer coated on the upper side of the insulating layer comprises:

[0037] A first jumper wire and a second jumper wire are respectively arranged on both sides of the insulating layer in a direction perpendicular to the direction of the jumpered wire, the first jumper wire is connected to the first pad in the jumper region, the second jumper wire is connected to the second pad in the jumper region, and the conductive layer is coated on the first pad, the second pad, and the insulating layer between the first pad and the second pad.

[0038] In the above technical solution, when the jumpered wire exists on the backlight assembly, the insulating layer is coated on the jumpered wire in the backlight region during the printing process of the backlight assembly, and the conductive layer is coated to conduct the jumpered wire, without the need to weld corresponding jumper devices for the jumpered wire in the subsequent processing process of the backlight assembly, thereby simplifying the processing process and reducing the production cost of the backlight assembly.

[0039] In some embodiments, in the jumper region, the narrower wire is the jumpered wire, and the wider wire is the jumper wire.

[0040] In the above technical solution, in the jumper region, the narrower wire is set as the jumpered wire, so as to reduce the coating length of the conductive layer connected to the jumper wire, reduce the use amount of the conductive layer raw material, and ensure the production cost of the backlight assembly.

[0041] In the display device provided by some embodiments of the present application, the display device includes a display panel, a power supply circuit, a controller, and a backlight assembly. The backlight assembly includes a driving circuit and a lamp panel. The lamp panel includes arrayed lamp beads. At least one lamp bead is electrically connected to form a light emitting unit group. The driving circuit includes at least one driving chip. A power supply end of each driving chip is electrically connected to the power supply circuit. Each driving end is electrically connected to a plurality of light emitting unit groups. The plurality of light emitting unit groups are respectively electrically connected to a plurality of power supply ends. The driving chip can supply power to the light emitting unit group electrically connected thereto according to a preset power supply sequence based on the power supply signal provided by the power supply circuit. The driving chip outputs a corresponding driving signal at each driving end based on the driving data provided by the controller, so as to drive different light emitting unit groups to generate corresponding light intensities. Based on the above connection relationship and control logic, the number of light emitting unit groups driven by each driving end of the driving chip is multiplied, and the driving capability of the driving chip in the backlight assembly is improved at a low cost. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the embodiments of some embodiments of the present application or the implementation manners in the related art, a brief introduction will be given below to the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0043] Figure 1Fig. 1 is a schematic diagram of an operating scenario between a display device and a control device according to some embodiments;

[0044] Figure 2 Fig. 2 is a schematic diagram of a structure of a display device according to some embodiments;

[0045] Figure 3 Fig. 3 is a schematic diagram of a structure of a display device according to some other embodiments;

[0046] Figure 4 Fig. 4 is a schematic diagram of a circuit structure of a backlight assembly according to some embodiments;

[0047] Figure 5A Fig. 5 is a schematic diagram of a structure of a backlight assembly according to some other embodiments;

[0048] Figure 5B Fig. 6 is a schematic diagram of a structure of a backlight assembly according to some other embodiments;

[0049] Figure 6 Fig. 7 is a schematic diagram of a control method of a display device according to some embodiments;

[0050] Figure 7 Fig. 8 is a schematic diagram of a structure of a driving chip according to some embodiments;

[0051] Figure 8A Fig. 9 is a schematic diagram of a connection relationship between a driving chip and a corresponding lamp bead according to some embodiments;

[0052] Figure 8B Fig. 10 is a schematic diagram of a connection relationship between a driving chip and a corresponding lamp bead according to some other embodiments;

[0053] Figure 8C Fig. 11 is a schematic diagram of a connection relationship between a driving chip and a corresponding lamp bead according to some other embodiments;

[0054] Figure 9 Fig. 12 is a schematic diagram of a coating position of an insulating layer and a conductive layer for a jumper wire in an example;

[0055] Figure 10 Fig. 13 is a schematic diagram of a coating position of an insulating layer and a conductive layer for a jumper wire in another example;

[0056] Figure 11 Fig. 14 is a schematic diagram of a waveform of driving data in an example;

[0057] Figure 12 Fig. 15 is a schematic diagram of a waveform of driving data in another example;

[0058] Figure 13 Fig. 16 is a schematic diagram of a waveform of driving data in another example;

[0059] Figure 14 For another exemplary waveform diagram of driving data in a frame.

[0060] Figure 15 For another exemplary waveform diagram of driving data in a frame.

[0061] Figure 16 For another exemplary waveform diagram of driving data in a frame. DETAILED DESCRIPTION

[0062] For the purpose of clarity, the present application will be described in connection with the exemplary embodiments disclosed below, but it is not intended to be limited to the disclosed embodiments, and all the features described therein can be selectively combined to form various embodiments.

[0063] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0064] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover but not exclusive of the inclusion, for example, a product or device containing a series of components does not have to be limited to those components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0065] The display device provided by the embodiments of the present application 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. Figure 1 And Figure 2 For a specific embodiment of the display device of the present application.

[0066] Figure 1 For an exemplary operation scenario between the display device and the control device according to some embodiments. As shown in Figure 1 The user can operate the display device 200 through the smart device 300 or the control device 100.

[0067] In some embodiments, the control device 100 can be a remote controller, and the communication between the remote controller and the display device 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.

[0068] In some embodiments, the smart device 300 (such as a mobile terminal, a tablet, a computer, a notebook, etc.) can also be used to control the display device 200. For example, the display device 200 is controlled using an application running on the smart device.

[0069] In some embodiments, the display device can not receive instructions using the smart device or the control device described above, but can receive user control through touch or gesture, etc.

[0070] 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 user voice instructions through a voice instruction acquisition module configured inside the display device 200, or can receive user voice instructions through a voice control device set outside the display device 200.

[0071] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 can be communicatively coupled 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.

[0072] Figure 2 A structural schematic diagram of the display device 200 according to some embodiments.

[0073] In some embodiments, the display device 200 includes a controller 250 configured to receive a video input signal or an image input signal, obtain backlight data and display data from the video input signal or the image input signal, and output after performing format conversion, timing control, etc.

[0074] In some embodiments, the controller 250 can include a system on chip (SOC) configured to obtain a video input signal or an image input signal (hereinafter referred to as an input signal) from an external input port or a network port, and perform format conversion, data processing, image rendering, etc. on the input signal.

[0075] In some embodiments, the controller 250 can include a timing controller (Tcon) configured to perform timing control output on the data obtained thereby.

[0076] In some embodiments, the timing controller is also configured to perform data format conversion.

[0077] In some embodiments, the controller 250 can include a backlight controller (Bcon) or a dimmer controller (DCON) configured to obtain processing data associated with backlight data, generate and output driving data from the processing data.

[0078] In some embodiments, the display device 200 includes a display panel 10 coupled with the controller 250, the display panel 10 including liquid crystal molecules configured to deflect based on received processed display data.

[0079] In some embodiments, the display device 200 includes a backlight assembly 20 coupled with the controller 250, the backlight assembly 20 configured to emit light based on the driving data. The display panel 10 can display a picture based on backlight provided by the backlight assembly 20.

[0080] In some embodiments, the backlight assembly 20 includes a driving circuit 201 coupled with the controller 250, the driving circuit 201 including a plurality of driving chips 202 configured to generate driving signals based on the driving data.

[0081] In some embodiments, the backlight assembly 20 further includes a lamp panel 30 including a plurality of lamp beads 301 arranged in an array, at least one lamp bead electrically connected to form a light emitting unit group, the light emitting unit group and one driving end of the driving chip 202 electrically connected, and configured to emit light based on the driving signal.

[0082] In some embodiments, in the light emitting unit group, at least one lamp bead is connected in series to form a lamp string.

[0083] In other embodiments, in the light emitting unit group, at least one lamp bead is connected in parallel.

[0084] In other embodiments, in the light emitting unit group, at least one lamp bead is connected in series to form a lamp string, and at least one lamp string is electrically connected in parallel.

[0085] In some embodiments, the lamp string is a lamp string formed by lamp beads connected in series from left to right or from right to left, or a lamp string formed by lamp beads connected from top to bottom or from bottom to top, or a lamp string formed by lamp beads connected in a preset order (e.g., rotation, bending, etc.).

[0086] In some embodiments, the lamp bead can be formed by MiniLED, MicroLED, WLED, RGB-LED, GB-rLED, or QLED (quantum dot).

[0087] In an embodiment, the display device 200 comprises a power supply circuit 13 coupled to the controller 250, the backlight assembly, and the display panel 10 respectively. The power supply circuit 13 is configured to provide corresponding power supply signals to the controller 250, the display panel 10, and / or the backlight assembly 20.

[0088] In some embodiments, the power supply circuit 13 and the power supply ends of each light emitting unit group in the backlight assembly 20 are coupled and configured to provide a backlight power supply signal VLED to cause the light emitting unit group to emit light when obtaining the backlight power supply signal VLED and the driving signal provided by the driving chip 202.

[0089] In some embodiments, the driving chip 202 samples the power supply voltage of the light emitting unit group to determine the power supply state of the light emitting unit group, which comprises an under-voltage state or an over-voltage state. The power supply state is fed back to the controller 250 to cause the controller 250 to provide a final feedback signal to the power supply circuit 13 based on the feedback signal. The power supply circuit 13 adjusts the power supply voltage based on the final feedback signal.

[0090] In some embodiments, the driving chip 202 transmits the feedback signal through a wire between its data output end Dout and the controller 250.

[0091] In other embodiments, the driving chip 202 reversely transmits the feedback signal to the controller 250 through the transmission wire of its driving data.

[0092] A physical structure schematic diagram of the backlight assembly 20 and the display panel 10 is shown in FIG. 4, in which 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 a picture. Figure 3

[0093] In some embodiments, the backlight assembly 20 comprises a back plate 407 configured to provide a supporting substrate.

[0094] In some embodiments, the backlight assembly 20 comprises a lamp plate 30 on which lamp beads are arranged to provide backlight.

[0095] In some embodiments, the backlight assembly 20 comprises a reflective sheet 404 configured to reflect the backlight of the lamp plate to the direction of the diffusion plate.

[0096] In some embodiments, the backlight assembly 20 comprises a bracket 403 configured to support the diffusion plate 402, the film sheet 401, etc. to maintain the optical distance between the lamp plate and the diffusion plate.

[0097] In some embodiments, the backlight assembly 20 comprises a film sheet 401.

[0098] In some embodiments, the backlight assembly 20 comprises a diffusion plate 402. ​

[0099] The film sheet 401 and the diffusion plate 402 are configured to improve the reflection efficiency of the backlight generated by the backlight assembly, uniformly guide light, increase brightness and color saturation, and adjust light rays, so that the brightness distribution of the entire display panel is more uniform.

[0100] In some embodiments, the arrangement order of the components in the backlight assembly 20 from top to bottom is as follows: the film sheet 401, the diffusion plate 402, the support 403, the reflective sheet 404, the lamp plate 30, and the back plate 407.

[0101] In some other embodiments, the backlight assembly 20 further includes a honeycomb plate 405 and a vibrator 406, which are arranged between the lamp plate 30 and the back plate 407 and are configured to drive the backlight assembly 20 and the display panel 10 to vibrate and emit sound based on a sound signal.

[0102] In some embodiments, as an example of a micro-LED display device, the backlight assembly 20 is provided with multiple lamp plates 30, and the multiple lamp plates 30 emit light jointly after being spliced to provide backlight for the display panel 10. Each lamp plate 30 includes multiple light-emitting areas, and each light-emitting area (also referred to as a sub-area) includes multiple micro-lamp beads. The micro-lamp beads are mini-LEDs, micro-LEDs, or other micrometer-level lamp beads.

[0103] The lamp plate 30 is electrically connected to a driving circuit, which includes one or more driving chips. Each driving chip of each sub-area receives processed backlight data emitted by the Bcon or Dcon and drives the corresponding lamp beads to emit light based on the processed backlight data, thereby realizing local backlight control of the backlight assembly, i.e., realizing Local dimming, so as to realize more accurate area light control and make the screen brightness more uniform and harmonious.

[0104] Figure 4 A structural schematic diagram of the backlight assembly 20 according to some embodiments.

[0105] In some embodiments, the backlight assembly 20 includes multiple lamp beads 301 arranged in an array. At least one electrically connected lamp bead constitutes a light-emitting unit group, which is referred to as a sub-area in some embodiments.

[0106] In some embodiments, the backlight assembly 20 includes a driving circuit 201, which includes multiple driving chips 202. The driving chip 202 is provided with a data input end DIN, which is coupled to a controller 250 and is configured to receive driving data.

[0107] The driving chip 202 is further provided with a power supply end VP connected to a power supply circuit 13. The power supply end VP is configured to receive a power signal VCC.

[0108] The driving chip 202 is also provided with at least one driving end, the at least one driving end is electrically connected with the negative electrode of the corresponding light emitting unit group, the positive electrode of the light emitting unit group is connected with the power supply circuit 13, the light emitting unit group is configured to obtain a power supply signal VLED from the power supply circuit 13 and a driving signal from the driving chip 202, and emits light based on the driving signal and the power supply signal.

[0109] To improve the display effect of the display device, the number of partitions on the backlight assembly can be increased, so that the number of light emitting unit groups that can be controlled in a unit area on the backlight assembly is increased. When the same brightness is provided in a unit area, the controller can adjust more light emitting unit groups to achieve the target brightness, and the adjustment of the number of light emitting unit groups improves the adjustment accuracy of the controller, thereby improving the quality of the display picture.

[0110] When the number of partitions is increased, the size of the single lamp bead 301 can be reduced, and the lamp bead 301 is bare die mounted on the lamp plate to increase the number of lamp beads 301 in a unit area on the backlight assembly 20, thereby increasing the number of partitions and reducing the production cost of the backlight assembly 20. The lamp plate on which the lamp beads 301 are arranged has improved wiring accuracy in response to the increase in the number of partitions, and the difference in production cost is not large.

[0111] With the increase in the number of partitions, the number of driving ends of each driving chip 202 or the number of driving chips 202 provided on the backlight assembly 20 is increased, so that each driving chip 202 in the driving circuit 201 meets the driving requirements of each partition. However, the increase in the number of driving ends of the driving chip 202 or the increase in the number of driving chips 202 will greatly increase the production cost of the backlight assembly. Therefore, how to improve the driving capability of the driving circuit in the backlight assembly at a low cost when the number of partitions in the backlight assembly is increased has become a research focus.

[0112] To this end, some embodiments of the present application provide a display panel control method and device, wherein the display device includes a display panel, a power supply circuit, a controller, a lamp plate, and a driving circuit. The driving circuit is provided with at least one driving end and a plurality of power supply ends. Each driving end corresponds to a plurality of light emitting unit groups, and the plurality of light emitting unit groups and the plurality of power supply ends correspond respectively. When the driving circuit obtains the driving data provided by the controller, the power supply signal is sequentially output from the plurality of power supply ends to sequentially supply power to the plurality of light emitting unit groups connected to each power supply end. Then, the corresponding driving signal is output through each driving end to drive different light emitting unit groups to generate corresponding light intensity. Based on the above connection relationship and control logic, the number of light emitting unit groups driven by each driving end of the driving circuit is multiplied, so that the driving requirements of the partitions can be met without increasing a large number of driving ends and corresponding driving circuit structures when the number of partitions on the lamp plate of the display device is increased, thereby realizing the low-cost improvement of the driving capability of the driving circuit in the backlight assembly.

[0113] The technical solutions of the present application 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 some embodiments.

[0114] Figure 5A The structural schematic diagram of the display device in the display device provided by some embodiments of the present application is shown in FIG. 1, which shows that in some embodiments, the display device comprises a power supply circuit 13 configured to provide a power supply signal. Figure 5A

[0115] In some embodiments, the display device comprises a controller 250 configured to provide processed backlight data.

[0116] In some embodiments, the display device comprises a backlight assembly 20 configured to emit light based on the processed backlight data.

[0117] In some embodiments, the backlight assembly 20 comprises a plurality of lamp beads 301 arranged in an array, and at least one lamp bead 301 is electrically connected to form a light emitting unit group.

[0118] In some embodiments, a single lamp bead 301 forms a light emitting unit group.

[0119] In some embodiments, at least two lamp beads 301 are electrically connected in series to form a light emitting unit group.

[0120] In some embodiments, at least two lamp beads 301 are electrically connected in series to form at least one lamp string, and at least one lamp string is electrically connected in parallel to form a light emitting unit group.

[0121] In the above embodiments, the at least two lamp beads electrically connected in series or in parallel can be lamp beads arranged row by row, lamp beads arranged column by column, or lamp beads arranged according to a preset order, which can form regular or irregular patterns.

[0122] In some embodiments, the backlight assembly 20 comprises a driving circuit 201.

[0123] In some embodiments, the driving circuit 201 is provided with a plurality of power supply ends.

[0124] In some embodiments, the driving circuit 201 is provided with a power supply end VP.

[0125] In some embodiments, the driving circuit 201 is provided with at least one driving end.

[0126] In some embodiments, the driving circuit 201 is provided with a data input end DIN.

[0127] In some embodiments, the power supply end VP and the power supply circuit 13 are coupled and configured to obtain the power supply signal obtained by the power supply circuit 13.​

[0128] In Figure 5A In the circuit structure of the example, each data input DIN is coupled with the controller 250, each data input DIN corresponds to an address information, and the controller 250 is configured to transmit the corresponding driving data to each data input DIN based on the address information.

[0129] In some embodiments, each output of the driving circuit 202 corresponds to a plurality of light emitting unit groups, and is electrically connected with the plurality of light emitting unit groups. The plurality of light emitting unit groups respectively correspond to a plurality of power supply terminals, and the number of the power supply terminals is determined by the number of the light emitting unit groups corresponding to each driving terminal.

[0130] In some embodiments, the number of the power supply terminals is greater than or equal to the number of the light emitting unit groups electrically connected with each driving terminal, and the power supply terminals can correspond to provide power supply signals to each light emitting unit group.

[0131] In other embodiments, each power supply terminal is electrically connected with an input of a gating device, and an output of the gating device is electrically connected with the light emitting unit group electrically connected with each driving terminal, and the total number of the outputs of the gating devices electrically connected with each power supply terminal is greater than or equal to the number of the light emitting unit groups electrically connected with each driving terminal.

[0132] The driving circuit 201 is configured to obtain a power supply signal and driving data, sequentially output the power supply signal from the power supply terminals based on the driving data, and output the corresponding driving signal from the driving terminals, and drive the light string corresponding to the power supply terminals and the driving terminals to emit light.

[0133] Figure 6 A flowchart of a control method of a display device is provided in the present application. As Figure 6 shown, the method comprises:

[0134] S101, the controller outputs driving data.

[0135] S102, the driving circuit sequentially outputs the power supply signal from the power supply terminals based on the driving data, and outputs the corresponding driving signal from the driving terminals, and drives the light emitting unit group corresponding to the power supply terminals and the driving terminals to emit light.

[0136] For example, the control method of the display device provided in the present application is further explained. Figure 5A

[0137] In some embodiments, the driving circuit 201 comprises a plurality of driving chips 202, each driving chip 202 is provided with at least one driving terminal, each driving terminal is electrically connected with at least two light emitting unit groups, and in Figure 5A ​In the shown example, the driving circuit 201 includes 3 driving chips 202, each driving chip 202 has each driving terminal electrically connected to two groups of light emitting units: the first group of light emitting units and the second group of light emitting units. The first and the second are only used to distinguish different groups of light emitting units, and do not have the meaning of sequence.

[0138] In some embodiments, each driving chip 202 is provided with a power supply terminal V1 and a power supply terminal V2, the power supply terminal V1 is electrically connected to the first group of light emitting units, and the power supply terminal V2 is electrically connected to the second group of light emitting units.

[0139] In other embodiments, each driving chip 202 is provided with a power supply terminal V1, and the power supply terminal V1 is electrically connected to the input terminal of the two-select gate. The two-select gate is provided with one input terminal and two output terminals, and the two output terminals are respectively electrically connected to the first group of light emitting units and the second group of light emitting units. The two-select gate has only one output terminal conducting with the input terminal at any time.

[0140] In some embodiments, the driving chip is provided with 4 driving terminals, and the driving chip can drive at most 8 groups of light emitting units. Each driving terminal is electrically connected to the driving terminals of two groups of light emitting units, and the power supply terminals of the two groups of light emitting units are respectively electrically connected to the corresponding power supply terminals.

[0141] In some embodiments, the group of light emitting units includes a lamp string composed of a plurality of lamp beads connected in series, and the driving terminal is electrically connected to the negative poles of the two lamp strings, and the positive poles of the two lamp strings are electrically connected to the corresponding two power supply terminals or the two output terminals of the two-select gate.

[0142] In the present embodiment, when the driving chip drives 8 groups of light emitting units, the driving chip selects a group of light emitting units to emit light based on the power supply terminal for the corresponding two rows and four columns of light emitting units, and drives the lamp string in the row to generate a driving signal corresponding to the brightness of the driving terminal based on the driving signal provided by the different driving terminals, thereby realizing the control of each lamp string by the driving chip.

[0143] In some embodiments, the plurality of driving chips 202 in the driving circuit 201 are arrayed, and when the display panel is scanned row by row, the plurality of driving chips 202 driving the plurality of groups of light emitting units in the same row form a driving group.

[0144] In some embodiments, the data input terminals of the plurality of driving chips 202 in each driving group are respectively electrically connected to the output terminals of the controller 250, as shown in Figure 5AAs shown, each driving chip 202 is provided with address information, which includes a physical address or a memory address; the controller 250 is electrically connected to the data input end of each driving chip 202 through a data line, and the controller 250 broadcasts data including address information to the data line, and the driving chip 202 corresponding to the address information obtains driving data from the data line to drive the corresponding light-emitting unit group to emit light.

[0145] In an embodiment, each driving chip 202 in the driving group is electrically connected in series based on the data line, and the driving chip 202 is further provided with a data output end DOUT, as shown in Figure 5B As shown, the data input end DIN of the first driving chip 202 is electrically connected to the output end of the controller 250, and the data input end DIN of the other driving chips 202 is electrically connected to the data output end DOUT of the previous driving chip 202.

[0146] In some embodiments, the driving data further includes the memory address of each driving chip, and the driving chip obtains the data corresponding to its memory address from the driving data based on the memory address;

[0147] In some other embodiments, the data obtained by each driving chip has the same size, and then the driving chip reads data segments with the same length from the driving data one by one, and after the reading of the data segment is completed, the remaining driving data is automatically shifted to the reading position to the front, so that the subsequent driving chip reads the data segment of the remaining driving data from the reading position.

[0148] When there are at least two driving groups, the first driving chip 202 in each driving group is provided with a physical address as the physical address of the driving group where it is located, and the controller 250 sets the physical address of each driving group in the driving data when transmitting the driving data, and each driving group can obtain the driving data transmitted by the controller 250 at the same time, and when the physical address of the driving data is consistent with the corresponding physical address, the driving data is transmitted one by one along the arrangement order of each driving chip 202 in the driving group, so as to ensure the accuracy of data transmission.

[0149] In some embodiments, when the driving chip 202 is provided with a plurality of power supply ends, a power switch is arranged between the power supply end and each power supply end, respectively, and the driving chip controls the output of the power supply signal of each power supply end by controlling the conduction of the power switch.

[0150] In some embodiments, the driving chip 202 includes a control unit 2021 and a plurality of power switches, and the plurality of power switches correspond to the plurality of power supply ends: the first end of the plurality of power switches is electrically connected to the power supply end VP of the driving chip, and the second end of the plurality of power switches is respectively coupled to the corresponding power supply end.

[0151] Figure 7A structural schematic diagram of the driving chip 202 according to some embodiments is shown in FIG. 2A. As shown in FIG. 2A, the driving chip 202 includes a first power switch K1 and a second power switch K2. The second terminal of the first power switch K1 is electrically connected to the power supply terminal V1, and the second terminal of the second power switch K2 is electrically connected to the power supply terminal V2. The first terminals of the first power switch K1 and the second power switch K2 are coupled to the power supply terminal VP of the driving chip 202. Figure 7

[0152] The control terminal of the multiplexer is electrically connected to the control unit 2021.

[0153] In some embodiments, when the driving chip 202 further includes a multiplexer, the power supply terminal VP of the driving chip 202 is electrically connected to the input terminal of the multiplexer, the multiple output terminals of the multiplexer are electrically connected to the first terminals of the multiple power switches in correspondence, and the control terminal of the multiplexer is electrically connected to the control unit 2021.

[0154] The control unit 2021 is further configured to drive the output terminals of the multiplexer to be turned on in a preset gating sequence based on the driving data.

[0155] In some embodiments, the multiplexer can be equivalent to the multiple power switches. In this case, the input terminal of the multiplexer is electrically connected to the power supply terminal VP of the driving chip 202, and each output terminal is electrically connected to a corresponding power supply terminal.

[0156] The driving chip 202 is configured to receive the power supply signal VLED provided by the power supply circuit 13 from the power supply terminal, sequentially control the multiple power switches to be turned on, and enable the multiple power supply terminals to sequentially output the power supply signal. It is worth noting that the multiple power supply terminals cannot output the power supply signal at the same time.

[0157] In some embodiments, the driving chip 202 is configured to obtain the driving data from the controller 250, and determine the control signals output to the multiple power switches based on the driving data.

[0158] In some embodiments, the driving data obtained by the driving circuit 201 includes multiple pulse signal segments, and the multiple pulse signal segments correspond to the multiple power supply terminals. The driving circuit 201 is configured to output the power supply signal from the corresponding power supply terminal in the power supply period corresponding to the pulse signal segment based on the multiple pulse signal segments; the display period includes multiple power supply periods, and the multiple power supply periods do not intersect with each other; the multiple pulse signal segments correspond to the multiple power supply periods, and the multiple power supply periods correspond to the multiple power supply terminals.

[0159] In each power supply period, the driving signal is output based on the pulse signal segment, and the light emitting unit group electrically connected to the driving terminal is driven to emit light.

[0160] ​The driving chip adjusts the conduction state of each power switch according to the acquisition state of the pulse signal segment, so as to adjust the power supply state of each power supply terminal.

[0161] Taking the driving chip 202 with two power supply terminals as an example, the driving data obtained by the driving chip is Figure 12 As shown in the waveform diagram, the control unit 2021 adjusts the control signal output by the controller based on the rising edge state of the pulse signal obtained by the control unit, that is, when the control unit obtains the rising edge of the first pulse signal, the control unit outputs the conduction control signal of the power switch connected to the power supply terminal V2, so that the power switch is turned on, and the power signal VLED obtained by the power supply terminal of the driving chip is output from the power supply terminal V2. Until the control unit obtains the rising edge of the second pulse signal, stop outputting the conduction control signal of the power switch connected to the power supply terminal V2, and output the conduction control signal of the power switch connected to the power supply terminal V1, so that the power signal VLED obtained by the power supply terminal of the driving chip is output from the power supply terminal V1.

[0162] When the driving chip 202 drives a plurality of light emitting unit groups, the plurality of light emitting unit groups electrically connected to the driving chip 202 correspond to a plurality of liquid crystal molecule groups on the display panel; each liquid crystal molecule group includes a plurality of liquid crystal molecules displayed simultaneously on the display panel.

[0163] The scanning direction of the liquid crystal molecule group on the display panel includes a first scanning direction and a second scanning direction, and the plurality of liquid crystal molecule groups arranged along the first scanning direction are displayed based on the same phase, and the plurality of liquid crystal molecule groups arranged along the second scanning direction are displayed based on different phases. For example: when the liquid crystal molecule group is scanned row by row from left to right and from top to bottom, the first scanning direction is from left to right, and the second scanning direction is from top to bottom; when the liquid crystal molecule is scanned column by column from top to bottom and from left to right, the first scanning direction is from top to bottom, and the second scanning direction is from left to right.

[0164] The plurality of light emitting unit groups electrically connected to each driving chip 202 are distributed based on the first scanning direction and the second scanning direction of the plurality of liquid crystal molecule groups. There are many cases for the connection mode of the driving chip 202 and the light emitting unit group and the arrangement mode of the light emitting unit group on the backlight assembly 20, which will be explained respectively through a plurality of embodiments.

[0165] In some embodiments, the plurality of light emitting unit groups electrically connected to each driving chip 202 are arranged in a plurality in the first scanning direction and one in the second scanning direction.

[0166] In some embodiments, the display panel is scanned row by row, and all the light emitting unit groups driven by the driving chip 202 are arranged in a row.

[0167] In some embodiments, the display panel scans column by column, and all light-emitting unit groups driven by the driver chip 202 are arranged in a column.

[0168] Based on the number of power supply terminals and the number of driving terminals set in the driver chip 202, all light-emitting unit groups electrically connected to the driver chip 202 are divided into multiple groups. The negative terminal of each group of light-emitting unit groups is connected to the same driving terminal, and the positive terminal of each group of light-emitting unit groups is connected to each power supply terminal accordingly.

[0169] Figure 8A This is a schematic diagram illustrating the connection relationship between a driver chip 202 and a light-emitting unit group, as shown below. Figure 8A As shown, the driver chip 202 electrically connects to eight light-emitting unit groups. The driver chip 202 has four driving terminals and two power supply terminals. The light-emitting unit groups are divided into groups of two. The negative terminals of the two light-emitting unit groups are connected to the same driving terminal, and the positive terminals of the two light-emitting unit groups are connected to the two power supply terminals respectively. Different driving terminals correspond to different light-emitting unit groups. For ease of description, the two light-emitting unit groups in the same group are designated as the first light-emitting unit group and the second light-emitting unit group. The first light-emitting unit group is connected to power supply terminal V1, and the second light-emitting unit group is connected to power supply terminal V2.

[0170] When the driver chip 202 is in operation, upon obtaining the driving data for the second light-emitting unit group in each group of light-emitting units, it outputs a power signal from the power supply terminal V1 based on this data and outputs a corresponding driving signal from each driving terminal. The second light-emitting unit group in each group then emits light based on the driving signal. Similarly, when the driver chip 202 obtains the driving data for the first light-emitting unit group in each group of light-emitting units, it outputs a power signal from the power supply terminal V2 based on this data and outputs a corresponding driving signal from each output terminal. The first light-emitting unit group in each group then emits light based on the driving signal.

[0171] The circuit connection provided in this embodiment can keep the original row scanning or column scanning method of the backlight component unchanged. Only during the control process of each driver chip 202, the light emission effect of the light emission process of one light emission unit group electrically connected to one driver end in the related technology is distributed to two light emission unit groups. Compared with the light emission effect in the related technology, the light emission control process of this embodiment is more precise.

[0172] In other embodiments, the number of multiple light-emitting unit groups electrically connected to each driving chip in the second scanning direction is at least two, and the number of at least two arrangements is less than or equal to the number of power supply terminals.

[0173] The number of multiple light-emitting unit groups electrically connected to each driving end in the second scanning direction is one.

[0174] In some embodiments, the display panel is scanned row by row, and all the groups of light emitting units driven by the driving chip 202 are arranged in multiple rows, and each driving terminal is electrically connected to multiple groups of light emitting units arranged in a row.

[0175] In some embodiments, the display panel is scanned column by column, and all the groups of light emitting units driven by the driving chip 202 are arranged in multiple columns, and each driving terminal is electrically connected to multiple groups of light emitting units arranged in a column.

[0176] Then, the multiple groups of light emitting units connected by the driving chip 202 are divided into multiple groups according to the division manner of the previous embodiment, and the connection manner of each group of light emitting units and the driving chip 202 is the same as that of the previous embodiment, which will not be described here.

[0177] For the arrangement of each group of light emitting units, in one case, each group of light emitting units in each group of light emitting units is arranged in a row, and in another case, each group of light emitting units in each group of light emitting units is arranged in at least two rows. Since the negative electrode of a group of light emitting units is connected to the same driving terminal, each group of light emitting units can emit light at the same time. More specifically, in each group of light emitting units, each group of light emitting units emits light in a preset order in the same time period until the time period ends.

[0178] Figure 8B For example, a schematic diagram of the arrangement of a group of light emitting units is shown in Figure 8B In the group of light emitting units, the group of light emitting units includes two groups of light emitting units, and the two groups of light emitting units are arranged in a row of the backlight assembly. Then, when the driving chip 202 drives the light emitting units to emit light, the driving chip 202 can control the multiple groups of light emitting units in the first row to emit light in the same time period, and control the multiple groups of light emitting units in the second row to emit light in the same time period. When the multiple rows of liquid crystal molecules in the display panel are scanned row by row from top to bottom, the starting time of the light emitting period of the first row is earlier than the starting time of the light emitting period of the second row. The delay time of the starting time of the second row compared to the starting time of the first row is the scanning delay time of the second row of liquid crystal molecules compared to the first row of liquid crystal molecules. When the backlight assembly needs to insert black for the response delay of the liquid crystal molecules, the delay time is the sum of the scanning delay time and the insertion time.

[0179] Then, the circuit connection relationship provided in the embodiment can be controlled by a group of driving chips to provide backlight to the multiple rows of liquid crystal molecules in the display panel row by row, or to provide backlight to the multiple columns of liquid crystal molecules in the display panel column by column, thereby simplifying the calculation and control of the row-by-row delay or column-by-column delay of the multiple groups of driving chips by the controller.

[0180] In other embodiments, the number of groups of light emitting units electrically connected to each driving terminal arranged in the second scanning direction is at least two, and the number of at least two is less than or equal to the number of power supply terminals.

[0181] In some embodiments, the display panel is scanned row by row, and all the light emitting unit groups driven by the driving chip 202 are arranged in multiple rows, and the light emitting unit groups electrically connected to each driving end are arranged in multiple rows.

[0182] In some embodiments, the display panel is scanned column by column, and all the light emitting unit groups driven by the driving chip 202 are arranged in multiple columns, and the light emitting unit groups electrically connected to each driving end are arranged in multiple columns.

[0183] Figure 8C For another example of the arrangement of a light emitting unit group, in Figure 8C , two light emitting unit groups in a group of light emitting unit groups are arranged in two rows, and the two rows of light emitting unit groups connected by the driving chip 202 emit light in the same time period. The time period in which the two rows of light emitting unit groups emit light is the scanning time period of the corresponding two rows of liquid crystal molecules.

[0184] Therefore, the circuit connection relationship provided by the embodiment simultaneously provides backlight to multiple rows of liquid crystal molecules in the display panel by using multiple rows of light emitting unit groups, or simultaneously provides backlight to multiple columns of liquid crystal molecules in the display panel by using multiple columns of light emitting unit groups, and the control logic is simpler than that of the foregoing embodiments, and is suitable for display devices with relatively low requirements on image quality.

[0185] In the foregoing three connection relationship diagrams of the driving chip 202 and the light emitting unit group, there is always a case of wire crossing. One case is that two wires for transmitting power signals cross, and the other case is that a wire for transmitting a power signal and a wire for transmitting a driving signal cross.

[0186] The positional relationship of the crossing wires on the lamp panel is as shown in Figure 9 When the wires in the horizontal direction need to cross the wires A in the vertical direction, the wires in the vertical direction are divided into two segments B1 and B2 by the wires A, and two pads are arranged on both sides of the wires A, and the two pads are connected to the wires B1 and B2, respectively. In the related art, for the wire crossing problem on the lamp panel, a crossing device is generally arranged to be connected to the two pads. Since the number of lamp beads in the lamp panel composed of miniLEDs or microLEDs is large, the number of light emitting unit groups is also large, and the number of wires that need to be crossed is also large, resulting in high processing cost of the lamp panel.

[0187] In the present application, a wire crossing method is provided, and the crossing method of two wires to be crossed is explained below. The crossing wires are crossed in the crossing area, and the two wires are copper wires in an embodiment, and an insulating layer is coated on the crossed copper wires, and a conductive layer is coated on the insulating layer to conduct the crossing wires. In an embodiment, the wire layer is copper paste. Then, for the wire crossing point, when printing the PCB on the lamp panel, the side where the lamp beads are arranged is the upper side, and the lamp panel sequentially includes the copper wire (the crossed wire), the insulating layer, and the copper paste conductive layer from bottom to top.

[0188] Reference is made below to Figure 9 The coating positions of the insulating layer and the conductive layer are explained. As Figure 9 shown, wire A is the crossed wire, and wires B1 and B2 need to be connected through the crossed wire A, and in the area to be crossed, the insulating layer C is coated on the wire A along the wire direction between the two pads D1 and D2, and the width of the insulating layer C is greater than the width of the crossed wire A and fully covers it.

[0189] In the vertical direction of the wire direction of the crossed wire A, the first crossing wire B1 and the second crossing wire B2 are respectively arranged on the two sides of the insulating layer C, the first crossing wire B1 is connected to the first pad D1 in the crossing area, the second crossing wire B2 is connected to the second pad D2 in the crossing area, and the conductive layer E is coated on the insulating layer C between the first pad D1, the second pad D2, and the first pad and the second pad, so that the first crossing wire B1 and the second crossing wire B2 are conducted and not electrically connected to the crossed wire A.

[0190] In some embodiments, when the first crossing wire B1 and the second crossing wire B2 are not arranged in the same row, the coating direction of the wire layer is the direction of the straight line connecting the first pad D1 and the second pad D2.

[0191] The wire crossing method provided in the present application can be used for corresponding printing operation according to the coating position and coating material arranged when printing the circuit board, and the subsequent circuit board processing cost is simplified without significantly increasing the cost, so as to realize the circuit connection method of the backlight assembly provided in the present application.

[0192] More specifically, on the printed circuit board, the signal transmitted by the wire is different, and the width of the corresponding wire is also different. Generally, the width of the wire transmitting the power supply is greater than the width of the wire transmitting the driving signal.

[0193] The wire connection relationship between the light emitting unit group and the driving chip is explained below by taking a driving chip including four driving ends and two power supply ends driving eight light emitting unit groups as an example.

[0194] In Figure 8AIn the shown conductor cross-connection diagram, the horizontal conductor is a conductor for transmitting power supply signals of a plurality of light emitting unit groups, and the vertical conductor is a conductor for transmitting power supply signals of a single light emitting unit group. On the basis of ensuring stable transmission of the power supply signals, the horizontal conductor is thicker than the bus conductor, so as to save the printing cost of the conductor.

[0195] In this case, the conductor with a narrow width (the vertical conductor) is determined as the cross-connection conductor, and the conductor with a wide width (the horizontal conductor) is determined as the cross-connection conductor. Since the cross-connection conductor has a narrow width, the distance between the pads arranged on both sides of the cross-connection conductor is small, and thus the amount of copper paste used in printing is small, and the printing cost of the copper paste can be reduced.

[0196] Since the copper paste has a large impedance, the copper paste has a small effect on the current value transmitted by the conductor pair for transmitting the power supply. If the copper paste is connected to the conductor for transmitting the driving signal, the impedance of the copper paste can greatly reduce the current value of the driving signal, resulting in abnormal driving.

[0197] In Figure 8B In the shown conductor cross-connection diagram, the horizontal conductor is a conductor for transmitting power supply signals of a plurality of light emitting unit groups, and the first and second vertical conductors from the left are conductors for transmitting power supply signals of a plurality of light emitting unit groups, and the remaining vertical conductors are conductors for transmitting power supply signals of a single light emitting unit group. The first and second conductors from the left have a width equal to the width of the horizontal conductor, and the width of the horizontal conductor is greater than the width of the remaining vertical conductors.

[0198] Therefore, for the cross-connection of two conductors with the same width, any one of the conductors can be selected as the cross-connection conductor, and the other conductor can be selected as the cross-connection conductor. Regardless of which conductor is selected as the cross-connection conductor, the corresponding PCB manufacturing cost is the same, and the impedance effect of the copper paste applied to the cross-connection conductor is the same.

[0199] For the cross-connection of two conductors with different widths, the cross-connection is performed according to the cross-connection mode shown in Figure 8A The cross-connection mode of the cross-connection point can be referred to in Figure 10 The vertical conductor is taken as the cross-connection conductor A, and an insulating layer is applied thereon. The horizontal conductors B2 and B1 are taken as the cross-connection conductors, and copper paste is applied between the pad D2 connected to the horizontal conductor B2 and the pad D1 connected to the horizontal conductor B1.

[0200] In Figure 8C In the shown conductor cross-connection diagram, the horizontal conductor is a conductor for transmitting power supply signals of a plurality of light emitting unit groups, and the vertical conductor is a conductor for transmitting power supply signals of a single light emitting unit group. Each vertical conductor is cross-connected to a second horizontal conductor, and the cross-connection conductor diagram is shown in Figure 10 The cross-connection mode of the cross-connection point has been described in Figure 8BThe embodiments are explained in the following description and shown in the drawings.

[0201] The control method of the backlight assembly in the display device is explained below. Figure 11 In the related art, the controller determines the driving data for each group of light emitting units connected to the same output terminal. Figure 4 The waveform diagram of the driving data output by the backlight assembly is shown. As shown in the diagram, in response to the frame start signal Vsync1, the controller determines the delay duration of the group of light emitting units driven by the driving chip, thereby determining the light emitting period of the group of light emitting units. Figure 11

[0202] In some embodiments, the driving data includes a pulse signal segment, the pulse signal segment includes a plurality of continuous pulse signals, and the pulse period of each pulse signal is the same. The controller determines the amplitude and duty cycle of the pulse signal segment based on the backlight data.

[0203] Each driving chip in the backlight assembly obtains the driving data from the controller, generates a driving signal based on the driving data, and drives the group of light emitting units to emit light.

[0204] In some embodiments, when the driving data includes a pulse signal segment, the driving chip determines the amplitude of the current provided to the group of light emitting units based on the amplitude of the pulse signal, and determines the proportion of the duration of the current provided to the group of light emitting units in the display period based on the duty cycle of the pulse signal.

[0205] The group of light emitting units determines the light emitting brightness based on the amplitude and duration of the current obtained from the driving chip.

[0206] When the connection relationship of the backlight assembly of the display device is the connection relationship of the backlight assembly provided in the present application, the controller can no longer drive the group of light emitting units to emit light correctly based on the waveform diagram shown. Figure 11 The controller needs to provide corresponding driving signals for the plurality of groups of light emitting units connected to the same output terminal.

[0207] The controller 250 is configured to, after obtaining the backlight data from the display data, provide a plurality of pulse signal segments in the light emitting period of each frame display period based on the backlight data; the pulse signal segment corresponds to a power supply period, and each pulse signal segment corresponds to a plurality of groups of light emitting units connected to each power supply terminal.

[0208] The driving circuit 201 is configured to, based on the pulse signal segment transmitted by the controller, drive the group of light emitting units corresponding to the pulse signal segment to emit light.

[0209] ​More specifically, the controller 250 obtains the pulse period corresponding to each driving terminal; the pulse period is the pulse period applied by the driving chip when driving a light emitting unit group connected to the driving terminal, i.e. Figure 11 the pulse period shown in the figure. The corresponding processing mode is the same, and the controller determines the light emitting duty cycle and amplitude of the pulse signal in the pulse period of the current frame based on the backlight data. Figure 13

[0210] Based on the determined light emitting duty cycle and amplitude, the controller divides each pulse period into a preset number of pulse sub-periods (i.e. power supply periods) during the light emitting period, the preset number of power supply periods correspond to the plurality of power supply terminals of each driving chip, and the preset number of power supply periods are arranged in each pulse period of the display period according to the preset power supply order of the plurality of power supply terminals.

[0211] In each power supply period, the driving chip outputs a pulse signal segment, the light emitting duty cycle of the pulse signal segment in the pulse sub-period in which it is located is the same as the duty cycle of the pulse signal in the pulse period, and the amplitude of the pulse sub-signal is the same as the amplitude of the pulse signal. The pulse signal segment can be a single pulse signal or multiple pulse signals, which is not limited here.

[0212] The driving chip supplies power to the corresponding plurality of light emitting unit groups through each power supply terminal based on the preset power supply order, and in each pulse period, for each power supply terminal, the driving chip drives the corresponding light emitting unit group to emit light based on the pulse signal segment in the power supply period corresponding to the power supply terminal.

[0213] In an embodiment, the pulse signal segment includes at least one first level signal and / or at least one second level signal;

[0214] The driving chip is configured to output a current from the driving terminal based on the first level signal in the pulse signal segment in each power supply period to drive the light emitting unit group electrically connected to the driving terminal to emit light;

[0215] and / or

[0216] In each power supply period, no current is output from the driving terminal based on the second level signal in the pulse signal segment, and the light emitting unit group electrically connected to the driving terminal does not emit light.

[0217] In some embodiments, since each liquid crystal molecule on the display panel is scanned in a preset order, the light emitting unit groups on the backlight assembly also emit light in a corresponding order according to the above order. For example, if the liquid crystal molecules in the display panel are scanned row by row from top to bottom, the light emitting unit groups on the backlight assembly also provide backlight row by row, and the controller 250 is configured to transmit the driving data of each light emitting unit group row by row according to the delay time length corresponding to each row of light emitting unit groups after obtaining the frame scanning signal. ​

[0218] The controller 250 is also configured to obtain a frame start signal and a delay time length of the liquid crystal molecule group corresponding to the light emitting unit group;

[0219] The start time of the display period corresponding to the light emitting unit group is determined based on the frame start signal and the delay time length. The delay time length of the liquid crystal molecule group includes a current row liquid crystal molecule scanning start time, a delay time length relative to the acquisition time of the frame start signal, and the sum of the frame start signal and the delay time length is the start time of the current light emitting display group corresponding to the display period.

[0220] Next, taking the circuit connection mode shown in Figure 8C as an example, the waveform of the driving data output by the controller is explained. Since Figure 8C in the same group, the negative electrode of the light emitting unit group is connected to the same driving end, then the delay period of the two rows of light emitting unit groups relative to the time when the frame start signal Vsync is obtained is the same, and in Figure 8C in the same group, the negative electrode of the light emitting unit group is connected to the same driving end, then the delay period of the two rows of light emitting unit groups relative to the time when the frame start signal Vsync is obtained is the same, and in Figure 8C the driving chip provides the power supply signal at the power supply end, and always provides the power supply signal in the order of the power supply end V2 and the power supply end V1, then the waveform of the driving data provided by the controller is as shown in Figure 12 .

[0221] In each pulse sub-period, the duty cycle of the pulse signal in the pulse sub-period is the same as Figure 11 the duty cycle shown in, and the amplitude is also the same. When the driving chip obtains the first pulse signal in each pulse period, it controls the power supply end V2 to output the power supply signal VLED, so that the positive electrode of the first row of light emitting unit groups obtains the power supply signal, and the driving chip outputs the driving signal from the driving end based on the pulse signal, so that the first row of light emitting unit groups emit light. When the driving chip obtains the second pulse signal in each pulse period, it controls the power supply end V2 to stop providing the power supply signal, controls the power supply end V1 to provide the power supply signal, and then outputs the driving signal based on the driving data, so that the first row of light emitting unit groups do not emit light, and the second row of light emitting unit groups emit light. This cycle continues until the light emitting period ends.

[0222] Since the power supply of the light emitting unit group connected to the driving chip is provided by the driving chip itself, only the pulse sequence of the driving signal corresponding to the same driving end connected to multiple light emitting unit groups needs to be calibrated in each frame display period during the driving process of the driving chip. In the related art, the PM driving is a unified power supply mode for providing power supply signals for the left and right light emitting unit groups in the backlight assembly. The power supply precision requirement is high, and the pulse sequence of all driving chips in the driving circuit needs to be calibrated. Therefore, the control method simplifies the control difficulty.

[0223] In some embodiments, the power switch in the driving chip is a controllable transistor, such as CMOS. Since the on and off processes of the controllable transistor also generate large power consumption, the power consumption used in the on process is smaller, so the power consumption of the driving chip can be reduced by reducing the on and off times of the controllable transistor.

[0224] The last power supply end of any pulse period is set to be the same as the first power supply end of the next pulse period in the display period of each frame, and the last power supply end of any pulse period remains in the power supply state until before the second power supply end of the next pulse period is powered.

[0225] For the circuit shown in Figure 8C When the driving chip drives the light emitting unit group to emit light in the light emitting period, in the first pulse period, the two power supply ends can be controlled to provide power supply signals in the order of power supply end V2 and power supply end V1, and the driving signals are provided in the same order to sequentially drive the first row of light emitting unit groups and the second row of light emitting unit groups to emit light. In the second pulse period, the power switch corresponding to power supply end V1 is not turned off at the end of the first pulse period, so in the second pulse period, the two power supply ends are controlled to provide power supply signals in the order of power supply end V1 and power supply end V2, and the provision of the driving signals is adjusted in the same order to sequentially drive the second row of light emitting unit groups and the first row of light emitting unit groups to emit light. At the end of the second pulse period, the on state of the power switch corresponding to power supply end V2 is maintained to control the two power supply ends to provide power supply signals in the order of power supply end V2 and power supply end V1 in the third pulse period to sequentially drive the first row of light emitting unit groups and the second row of light emitting unit groups to emit light. This process is repeated until the end of the light emitting period. The waveform generated by the controller 250 is as shown in Figure 13 .

[0226] In some embodiments, considering the unstable state period of the liquid crystal molecule group at the beginning of the display period, the display period is divided into a black insertion period and a light emitting period. The black insertion period includes the unstable state period of the liquid crystal molecules.

[0227] In the angle adjustment process of the liquid crystal molecule group from the deflection angle applied when displaying the previous frame of picture to the deflection angle applied in the current frame of picture, when the rotation angle is greater than or equal to the product of the preset proportion and the deflection angle difference, it is determined that the liquid crystal molecule is in a stable period; when the rotation angle is less than the product of the preset proportion and the deflection angle difference, it is determined that the liquid crystal molecule is in an unstable period.

[0228] The controller controls the light emitting unit group not to emit light in the unstable period of the liquid crystal molecule group to realize black insertion operation, and prevents the occurrence of ghosting phenomenon between adjacent two frames of picture.

[0229] In related technologies, to improve the smoothness and clarity of the display screen, some LCD displays employ Variable Refresh Rate (VRR) technology. This dynamically adjusts the display cycle of the display panel and backlight components based on the current frame rate to regulate the image refresh rate. If the controller 250 controls the backlight component to perform black frame insertion only at the beginning of a frame's display, the black frame insertion time will be the same at different refresh rates, but the illumination time will differ, resulting in screen flickering when the refresh rate changes.

[0230] To address the aforementioned issues, the controller 250 is further configured to divide the display cycle of the light-emitting unit group into a black insertion period and at most two light-emitting periods. During the black insertion period, no driving data is output, while during the light-emitting periods, driving data is output. This ensures that the backlight components maintain a consistent average brightness across each frame of the display based on the control signal, thereby reducing screen flicker.

[0231] In some embodiments, when the refresh rate applied to the current frame is equal to the maximum refresh rate of the display panel, the controller 250 maintains its original waveform transmission state. Figure 12 Taking the waveform shown as an example, when the current refresh rate is the maximum refresh rate of the display panel, the waveform output by the controller 250 is still [waveform value missing]. Figure 12 The waveform shown.

[0232] In some embodiments, when the refresh rate of the current frame is less than the maximum refresh rate of the display panel, the controller 250 divides the light-emitting period into a first light-emitting sub-period and a second light-emitting sub-period. The first light-emitting sub-period is the same as the light-emitting period corresponding to the maximum refresh rate, and the amplitude of the second light-emitting sub-period is the product of a preset ratio and the amplitude in the first light-emitting sub-period.

[0233] Then Figure 12 Taking the waveform shown as an example, when the refresh rate is less than the maximum refresh rate of the display panel, the waveform output by the controller 250 is as follows: Figure 14 As shown. The amplitude of the second light-emitting sub-period is the product of the amplitude of the first light-emitting sub-period and the black insertion ratio, where the black insertion ratio is the quotient of the black insertion duration divided by the sum of the black insertion duration and the first light-emitting sub-period within the display cycle.

[0234] In other embodiments, the controller may also repeatedly transmit waves according to the wave transmission situation corresponding to the maximum refresh rate. When the remaining duration of the light transmission period after deducting the duration of at least one light transmission period corresponding to the maximum refresh rate is less than the duration of the light transmission period corresponding to the maximum refresh rate, the duty cycle of the pulse wave of the remaining duration is adjusted to the black insertion ratio.

[0235] Then Figure 12The waveform shown is an example. When the refresh rate is less than the maximum refresh rate of the display panel, the waveform output by the controller 250 is as shown Figure 15 The duration of each pulse in the second light emitting sub-period is the product of the duration of the pulse in the first light emitting sub-period and the black insertion ratio, where the black insertion ratio is the quotient of the black insertion duration divided by the sum of the black insertion duration and the first light emitting sub-period.

[0236] In some embodiments, the controller 250 employs joint dimming, that is, in the driving data provided by the controller 250 during the display of a frame, the amplitudes of the currents are the same, and different duty cycles correspond to different light emitting durations, thereby corresponding to different numerical values in the backlight data, where the larger the numerical value in the backlight data, the brighter the brightness provided by the light emitting unit group in the backlight assembly, and the larger the duty cycle in the driving data provided by the controller for the light emitting unit group; the smaller the numerical value in the backlight data, the smaller the duty cycle in the driving data provided by the controller for the light emitting unit group.

[0237] When the controller 250 employs joint dimming to display different frames, the amplitudes of the driving data generated based on the backlight data are not completely the same. The application of joint dimming can make the control method provided by the application control the backlight provided by the backlight assembly more delicate, and the display device applying the backlight assembly displays the frame better.

[0238] In some embodiments, the controller 250 obtains the power supply state of the light emitting unit group through the driving circuit, and controls the power supply circuit to adjust the voltage value provided by the power supply circuit based on the power supply state. In order to simplify the circuit structure, the current-voltage relationship of the light emitting unit group is stored in the controller 250 or a memory accessible thereto in advance; the image data includes backlight data, and the current-voltage relationship of the light emitting unit group represents the current value flowing through the light emitting sub-unit when different power supply voltage values are applied to the light emitting sub-unit;

[0239] In some embodiments, based on the backlight data, driving data corresponding to each light emitting sub-unit is generated; the driving data includes a current value and a duty cycle; the current value corresponding to each light emitting sub-unit is the same;

[0240] In some embodiments, based on the current-voltage relationship, the power supply voltage value corresponding to the current value is determined, and a power supply voltage whose voltage value is the power supply voltage value corresponding to the target current value is output to the light emitting unit group.

[0241] In some embodiments, when determining the current-voltage relationship of the light emitting unit group, the controller determines the minimum power supply voltage that can be provided by the power supply circuit, and determines the first sampling point of the fitting relationship based on the current value at which each light emitting unit group is in an overvoltage state.

[0242] The controller controls the driving circuit to provide at least one preset current value and adjusts the power supply voltage so that the voltage value is the minimum voltage value at which each light emitting unit group is overvoltage;

[0243] Based on the above-mentioned plurality of current-voltage sampling points, the current-voltage relationship is fitted. Thus, the power supply circuit no longer needs to obtain the feedback signal related to the light emitting unit group from the driving circuit when determining the power supply voltage, so as not to occupy the transmission path of the driving data or set up a separate data line, thereby guaranteeing the transmission rate of the driving data and the simplicity of the circuit structure. Moreover, since the current-voltage relationship of the light emitting sub-unit is fitted in advance, the accuracy of determining the power supply voltage is guaranteed based on the consistency of the joint dimming backlight circuit, thereby guaranteeing the display accuracy.

[0244] In some embodiments, the backlight assembly is further provided with a power supply control chip 251, which is connected with the power supply output end of the power supply circuit, the power supply end of the driving circuit and the output end of the controller 250 respectively. The circuit connection relationship is as shown in Figure 16 The power supply control chip 251 is configured to supply power to the driving chip corresponding thereto and output the driving signal when receiving the driving signal, so that the driving chip drives the light string to emit light based on the driving signal.

[0245] The power supply control chip 251 is further configured to stop supplying power to the driving chip corresponding thereto and providing the driving signal when not receiving the driving signal, so that the driving chip stops driving the light string to emit light, so that the driving chip reduces the leakage current and reduces the loss during the standby process of the display device.

[0246] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0247] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are for better explanation of the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device, characterized by comprising: The display device comprises: a display panel; a power supply circuit electrically connected to the display panel; a controller electrically connected to the display panel and the power supply circuit; a backlight assembly electrically connected to the controller and the power supply circuit, the backlight assembly comprising a driving circuit and a lamp panel; the lamp panel comprises a plurality of lamp beads arranged in an array, at least one lamp bead being electrically connected to form a light emitting unit group; the driving circuit comprises at least one driving chip, each driving chip being provided with a power supply end, at least one driving end and a plurality of power supply ends, the power supply end being electrically connected to the power supply circuit, each driving end being electrically connected to a plurality of light emitting unit groups, and the plurality of light emitting unit groups respectively corresponding to the plurality of power supply ends; wherein different driving ends are electrically connected to different light emitting unit groups.

2. The display device of claim 1, wherein, The display panel comprises a plurality of liquid crystal molecules arranged in an array, and at least one liquid crystal molecule group is displayed simultaneously to form a liquid crystal molecule group; the plurality of light emitting unit groups electrically connected to the driving chip correspond to a plurality of liquid crystal molecule groups; the plurality of light emitting unit groups electrically connected to each driving chip are distributed based on a first scanning direction and a second scanning direction of the plurality of liquid crystal molecule groups; the plurality of liquid crystal molecule groups arranged along the first scanning direction are displayed based on the same phase; the plurality of liquid crystal molecule groups arranged along the second scanning direction are displayed based on different phases.

3. The display device of claim 2, wherein, The arrangement number of the plurality of light emitting unit groups electrically connected to each driving chip in the first scanning direction is the plurality, and the arrangement number in the second scanning direction is one.

4. The display device of claim 2, wherein, The arrangement number of the plurality of light emitting unit groups electrically connected to each driving chip in the second scanning direction is at least two; the arrangement number of the at least two is less than or equal to the number of the power supply ends; the arrangement number of the plurality of light emitting unit groups electrically connected to each driving end in the second scanning direction is one.

5. The display device of claim 2, wherein, The arrangement number of the plurality of light emitting unit groups electrically connected to each driving end in the second scanning direction is at least two; the arrangement number of the at least two is less than or equal to the number of the power supply ends.

6. The display device of claim 1, wherein, The driving chip is provided with a plurality of power switches and a control unit; the input ends of the plurality of power switches are coupled to the power supply end of the driving chip; the output ends of the plurality of power switches are correspondingly connected to the plurality of power supply ends; the control unit is electrically connected to the control ends of the plurality of power switches.

7. The display device of any one of claims 1-6, wherein, When at least two wires connected between the plurality of light emitting unit groups and the driving chip are bridged, in the bridging area, an insulating layer is coated on the upper side of the bridged wire, and a conductive layer is coated on the upper side of the insulating layer; the conductive layer conducts the bridged wire.

8. The display device of claim 7, wherein in the bridging area, the insulating layer is coated on the upper side of the bridged wire along the wire of the bridged wire; the width of the insulating layer is greater than the width of the bridged wire.

9. The display device of claim 7, wherein, the conductive layer is coated on the upper side of the insulating layer, comprising: A first jumper wire and a second jumper wire are respectively arranged on both sides of the insulating layer in a vertical direction along a wire direction of the jumpered wire, the first jumper wire is connected to the first pad in the jumper region, the second jumper wire is connected to the second pad in the jumper region, and the conductive layer is coated on the first pad, the second pad, and the insulating layer between the first pad and the second pad.

10. The display device of claim 9, wherein, In the jumper region, the wire with a narrower width is the jumpered wire, and the wire with a wider width is the jumper wire.

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