Control method and apparatus of a display device

Abstract

Some embodiments of the present application provide a display device control method and apparatus, the display device comprising a display panel, a power supply circuit, a controller, a lamp panel and a driving circuit, the driving circuit being provided with at least one driving end and a plurality of power supply ends, each driving end corresponding to a plurality of light emitting unit groups, the plurality of light emitting unit groups and the plurality of power supply ends corresponding respectively, when the driving circuit obtains driving data, sequentially outputting power supply signals 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, outputting corresponding driving signals 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, when the number of partitions on the lamp panel of the display device increases, the driving demand of the partitions can be met without increasing a large number of driving ends and corresponding driving circuit structures, and the driving capability of the driving circuit in the backlight assembly is improved at 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 whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Some embodiments of the present application relate to display technology. More specifically, it relates to a display device control method and apparatus. BACKGROUND

[0003] A display device is a device that displays 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 (subregion). The drive circuit drives each subregion to emit light.

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

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

[0006] In a first aspect, some embodiments of the present application provide a display device control method, the method being applied to a drive circuit in a display device, the display device further including a display panel, a power supply circuit, a controller and a lamp panel;

[0007] The lamp panel includes an array of lamp beads, at least one lamp bead being electrically connected to form a light emitting unit group;

[0008] The drive circuit is provided with an input end, at least one driving end and a plurality of power supply ends, the input end being electrically connected to the controller, each driving end corresponding to a plurality of light emitting unit groups, the plurality of light emitting unit groups respectively corresponding to the plurality of power supply ends; wherein different driving ends correspond to different light emitting unit groups;

[0009] The method includes:

[0010] Obtaining a power supply signal provided by the power supply circuit and a driving data provided by the controller;

[0011] Based on the driving data, sequentially outputting the power supply signal from the power supply end, outputting a corresponding driving signal from the driving end, and driving the light emitting unit groups corresponding to the power supply end and the driving end to emit light.

[0012] In the above technical solution, the display device includes a display panel, a power supply circuit, a controller, a lamp board, and a driving circuit. The driving circuit has at least one driving end and multiple power supply ends. Each driving end corresponds to multiple light-emitting unit groups, and the multiple light-emitting unit groups and multiple power supply ends correspond to each other. When the driving circuit receives driving data provided by the controller, it sequentially outputs power signals from multiple power supply ends to supply power to the multiple light-emitting unit groups connected to each power supply end in turn. Then, it outputs corresponding driving signals through each driving end 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 circuit can be increased exponentially. When the number of partitions on the lamp board of the display device increases, it is not necessary to add a large number of driving ends and corresponding driving circuit structures to meet the driving requirements of the partitions, thereby achieving a low-cost improvement in the driving capability of the driving circuit in the backlight assembly.

[0013] In some embodiments, within a frame display cycle, the driving data includes multiple pulse signal segments, and the multiple pulse signal segments correspond to the multiple power supply terminals;

[0014] Based on the driving data, the power supply signal is sequentially output from the power supply terminal, and the corresponding driving signal is output from the driving terminal to drive the power supply terminal and the corresponding light-emitting unit group to emit light, including:

[0015] Based on the plurality of pulse signal segments, the power signal is output from the corresponding power supply terminal during the power supply period corresponding to the pulse signal segment; the display cycle includes a plurality of power supply periods, which do not overlap with each other; the plurality of pulse signal segments correspond to the plurality of power supply periods, and the plurality of power supply periods correspond to the plurality of power supply terminals;

[0016] During each of the power supply periods, a driving signal is output based on the pulse signal segment to drive the light-emitting unit group electrically connected to the driving end to emit light.

[0017] In some embodiments, the pulse signal segment includes at least one first-level signal and / or at least one second-level signal;

[0018] During each of the aforementioned power supply periods, a driving signal is output based on the pulse signal segment to drive the light-emitting unit group electrically connected to the driving terminal to emit light, including:

[0019] During each of the power supply periods, based on the first level signal in the pulse signal segment, current is output from the driving terminal to drive the light-emitting unit group electrically connected to the driving terminal to emit light;

[0020] and / or

[0021] During each of the power supply periods, based on the second level signal in the pulse signal segment, no current is output from the driving terminal, driving the light-emitting unit group electrically connected to the driving terminal to not emit light.

[0022] In the above technical solution, the driving circuit controls the corresponding power supply terminal to provide power signals in sequence based on the multiple pulse signal segments it obtains. When the light-emitting unit group is powered on, the driving circuit outputs current based on the first level signal in the pulse signal segment to drive the light-emitting unit group to emit light, and does not output current based on the second level signal to drive the light-emitting unit group not to emit light. This achieves the goal of improving the driving capability of the driving circuit while ensuring the accuracy of its control over the light-emitting unit group.

[0023] In some embodiments, before outputting the power signal from the corresponding power supply terminal, the method further includes:

[0024] Based on the multiple pulse signal segments, the power supply terminal that supplies power at the end of the display cycle is the same as the power supply terminal that supplies power at the beginning of the next display cycle.

[0025] In the above technical solution, when the driving circuit outputs the driving signal segment, it controls the power supply terminal that is powered at the end of the display cycle to be the same as the power supply terminal that is powered at the beginning of the next display cycle. This reduces the number of state changes of the devices associated with power supply in the driving circuit during the display process of multiple display cycles, thereby reducing the power consumption of the driving circuit.

[0026] Secondly, some embodiments of this application provide a control method for a display device, the method being applied to a controller in the display device, the display device further comprising: a display panel, a power supply circuit, a lamp board, and a driving circuit;

[0027] The lamp panel includes an array of lamp beads, with at least one lamp bead connected in series to form a light-emitting unit group;

[0028] The driving circuit has an input terminal, at least one driving terminal and multiple power supply terminals. The input terminal is electrically connected to the controller. Each driving terminal corresponds to multiple light-emitting unit groups. The multiple light-emitting unit groups correspond to the multiple power supply terminals respectively. Different driving terminals correspond to different light-emitting unit groups.

[0029] The method includes:

[0030] Output driving data so that after the driving circuit acquires the driving data and the power signal output by the power supply circuit, it sequentially outputs the power signal from the power supply terminal and outputs the corresponding driving signal from the driving terminal based on the driving data, thereby driving the power supply terminal and the corresponding light-emitting unit group of the driving terminal to emit light.

[0031] In some embodiments, the output driving data includes:

[0032] Obtain display data, including backlight data;

[0033] Based on the backlight data, multiple pulse signal segments are provided during multiple power supply periods in each display cycle, so that the driving circuit drives the corresponding light-emitting unit group to emit light based on the pulse signal segments; the pulse signal segments correspond to the multiple power supply periods, and each pulse signal segment corresponds to the multiple light-emitting unit groups connected to each power supply terminal.

[0034] In some embodiments, based on the backlight data, multiple pulse signal segments are provided during multiple power supply periods in each frame display cycle, including:

[0035] The driving terminal of the driving circuit is obtained in multiple power supply periods corresponding to each display cycle; the power supply period is the period when each light-emitting unit group electrically connected to the driving terminal receives power from the corresponding power supply terminal, and the arrangement order of each power supply period in the display cycle is the same as the power supply order of each power supply terminal of the driving circuit.

[0036] Based on the backlight data, determine the emission duty cycle and amplitude of the pulse signal segment during the power supply period;

[0037] During the power supply period, a pulse signal segment is output based on the emission duty cycle and the amplitude.

[0038] In some embodiments, the display panel includes an array of liquid crystal molecules, and at least one liquid crystal molecule displayed simultaneously constitutes a liquid crystal molecule group.

[0039] Obtaining multiple power supply periods corresponding to each driving terminal of the driving circuit within each display cycle, including:

[0040] The display period of the multiple light-emitting unit groups electrically connected to the driving end is obtained, and the scanning period of the liquid crystal molecule groups corresponding to the multiple light-emitting unit groups is the same;

[0041] Based on the power-on sequence of the multiple light-emitting unit groups, the display cycle sequence is divided into multiple power supply periods, with each light-emitting unit group corresponding to at least one power supply period.

[0042] In some embodiments, before obtaining the multiple power supply periods corresponding to each drive terminal of the drive circuit, the method further includes:

[0043] Obtain the frame start signal and the delay time of the liquid crystal molecule group corresponding to the light-emitting unit group;

[0044] The display cycle corresponding to the light-emitting unit group is determined based on the frame start signal and the delay duration.

[0045] Thirdly, this application provides a control device for a display device, comprising:

[0046] The acquisition module is configured to acquire power signals provided by the power supply circuit and driving data provided by the controller; the display device includes a display panel, a power supply circuit, a controller, a driving circuit containing the acquisition module, and a lamp board; the lamp board includes an array of LEDs, with at least one LED electrically connected to form a light-emitting unit group; the driving circuit has an input terminal, at least one driving terminal, and multiple power supply terminals, the input terminal is electrically connected to the controller, each driving terminal corresponds to multiple light-emitting unit groups, and the multiple light-emitting unit groups respectively correspond to the multiple power supply terminals; wherein, different driving terminals correspond to different light-emitting unit groups;

[0047] The processing module is configured to sequentially output the power signal from the power supply terminal and output the corresponding drive signal from the drive terminal based on the drive data, thereby driving the power supply terminal and the corresponding light-emitting unit group of the drive terminal to emit light.

[0048] Fourthly, this application provides a control device for a display device, comprising:

[0049] The processing module outputs driving data so that the driving circuit in the display device obtains the driving data and the power signal output by the power supply circuit in the display emitter. Based on the driving data, the power signal is sequentially output from the power supply end, and the corresponding driving signal is output from the driving end to drive the power supply end and the corresponding light-emitting unit group of the driving end to emit light.

[0050] The display device includes a display panel, a power supply circuit, a lamp board, a driving circuit, and a controller including the processing module; the lamp board includes an array of LEDs, with at least one LED electrically connected to form a light-emitting unit group; the driving circuit has an input terminal, at least one driving terminal, and multiple power supply terminals, the input terminal is electrically connected to the controller, each driving terminal corresponds to multiple light-emitting unit groups, and the multiple light-emitting unit groups respectively correspond to the multiple power supply terminals; wherein, different driving terminals correspond to different light-emitting unit groups.

[0051] In the control method and apparatus for a display device provided in some embodiments of this application, the display device includes a display panel, a power supply circuit, a controller, a lamp board, and a driving circuit. The driving circuit has at least one driving end and multiple power supply ends. Each driving end corresponds to multiple light-emitting unit groups, and the multiple light-emitting unit groups and multiple power supply ends correspond to each other. When the driving circuit obtains driving data provided by the controller, it sequentially outputs power signals from multiple power supply ends to supply power to the multiple light-emitting unit groups connected to each power supply end in sequence. Then, it outputs corresponding driving signals through each driving end 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 circuit can be increased exponentially. When the number of partitions on the lamp board of the display device increases, it is not necessary to add a large number of driving ends and corresponding driving circuit structures to meet the driving requirements of the partitions, thereby achieving a low-cost improvement in the driving capability of the driving circuit in the backlight assembly. Attached Figure Description

[0052] To more clearly illustrate the implementation methods in some embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0053] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments;

[0054] Figure 2 This is a schematic diagram of the structure of a display device according to some embodiments;

[0055] Figure 3 This is a schematic diagram of the structure of a display device according to some other embodiments;

[0056] Figure 4 This is a schematic diagram of the circuit structure of a backlight assembly according to some embodiments;

[0057] Figure 5A This is a schematic diagram of the structure of a backlight assembly according to some other embodiments;

[0058] Figure 5B This is a schematic diagram of the structure of a backlight assembly according to some other embodiments;

[0059] Figure 6 This is a flowchart illustrating a control method for a display device according to some embodiments;

[0060] Figure 7 This is a schematic diagram of the structure of a driver chip according to some embodiments;

[0061] Figure 8AThis is a schematic diagram showing the connection relationship between a driver chip and its corresponding LED beads according to some embodiments.

[0062] Figure 8B This is a schematic diagram of the connection relationship between the driver chip and its corresponding LED beads according to some other embodiments;

[0063] Figure 8C This is a schematic diagram of the connection relationship between the driver chip and its corresponding LED beads according to some other embodiments;

[0064] Figure 9 This is an example of a schematic diagram showing the coating positions of the insulation and conductive layers for a jumper wire;

[0065] Figure 10 This is a schematic diagram showing the coating positions of the insulation and conductive layers for a jumper wire in another example.

[0066] Figure 11 This is a waveform diagram of the driving data in an example;

[0067] Figure 12 This is a waveform diagram of the driving data in another example;

[0068] Figure 13 This is a waveform diagram of the driving data in another example;

[0069] Figure 14 This is a waveform diagram of the driving data in another example;

[0070] Figure 15 This is a waveform diagram of the driving data in another example;

[0071] Figure 16 This is a schematic diagram of the structure of a backlight assembly according to some other embodiments. Detailed Implementation

[0072] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0073] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0074] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0075] The display device provided in this application can have various implementation forms, such as a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is one specific embodiment of the display device of this application.

[0076] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0077] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0078] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200.

[0079] In some embodiments, the display device may receive instructions not through the aforementioned smart devices or control devices, but through touch or gestures.

[0080] 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, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0081] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may be communicatively coupled via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0082] Figure 2 This is a schematic diagram of the structure of a display device 200 according to some embodiments.

[0083] In some embodiments, the display device 200 includes a controller 250, which is 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 perform format conversion, timing control and other processing on the backlight data and display data before outputting them.

[0084] In some embodiments, the controller 250 may include a system-on-chip (SOC) controller configured to obtain video input signals or image input signals (hereinafter referred to as input signals) from an external input port or a network port, and perform operations such as format conversion, data processing, and image rendering on the input signals.

[0085] In some embodiments, controller 250 may include a timing controller (Tcon) configured to perform timing control output on the data it acquires.

[0086] In some embodiments, the timing controller is also configured to perform data format conversion.

[0087] In some embodiments, controller 250 may include a backlight controller (Bcon) or a dimming controller (DCON), configured to obtain processing data associated with backlight data, generate and output driving data from the processing data.

[0088] In some embodiments, the display device 200 includes a display panel 10 coupled to a controller 250, the display panel 10 including liquid crystal molecules configured to deflect based on received processed display data.

[0089] In some embodiments, the display device 200 includes a backlight assembly 20, the backlight assembly 20 and a controller 250 are coupled, and the backlight assembly 20 is configured to emit light based on driving data. The display panel 10 can display an image based on the backlight provided by the backlight assembly 20.

[0090] In some embodiments, the backlight assembly 20 includes a driving circuit 201 coupled to a controller 250. The driving circuit 201 includes a plurality of driving chips 202 configured to generate driving signals based on driving data.

[0091] In some embodiments, the backlight assembly 20 further includes a lamp board 30, which includes an array of lamp beads 301. At least one lamp bead is electrically connected to form a light-emitting unit group. The light-emitting unit group is electrically connected to a driving end of the driving chip 202 and is configured to emit light based on a driving signal.

[0092] In some embodiments, in the light-emitting unit group, at least one LED bead is connected in series to form a light string;

[0093] In other embodiments, at least one LED chip is connected in parallel in the light-emitting unit group;

[0094] In other embodiments, in the light-emitting unit group, at least one LED bead is connected in series to form a light string, and at least one light string is connected in parallel.

[0095] Among them, the light string is a light string composed of light beads connected from left to right or from right to left, or it can be a light string composed from top to bottom or bottom to top, or it can be a light string composed of light beads connected in a preset order (e.g., rotation, bending, etc.).

[0096] The LEDs can be composed of MiniLED, MicroLED, WLED, RGB-LED, GB-rLED or QLED (quantum dot).

[0097] In one embodiment, the display device 200 includes a power supply circuit 13, which is coupled to a controller 250, a backlight assembly, and a display panel 10. The power supply circuit 13 is configured to provide corresponding power signals to the controller 250, the display panel 10, and / or the backlight assembly 20.

[0098] In some embodiments, the power supply terminals of the power supply circuit 13 and each light-emitting unit group in the backlight assembly 20 are coupled and configured to provide a backlight power supply signal VLED so that the light-emitting unit group emits light when it receives the backlight power supply signal VLED and the driving signal provided by the driver chip 202.

[0099] In some embodiments, the driver chip 202 samples the supply voltage of the light-emitting unit group to determine the supply state of the light-emitting unit group, which includes an undervoltage state or an overvoltage state. The supply state is fed back to the controller 250, so that the controller 250 provides a final feedback signal to the power supply circuit 13 based on the feedback signal. The power supply circuit 13 adjusts the supply voltage based on the final feedback signal.

[0100] In some embodiments, the driver chip 202 transmits feedback signals through the wires between its data output terminal Dout and the controller 250.

[0101] In other embodiments, the driver chip 202 uses its drive data transmission lines to transmit the feedback signal in reverse to the controller 250.

[0102] A schematic diagram of the physical structure of the backlight assembly 20 and the display panel 10 is shown below. Figure 3 As shown, the display panel 10 is positioned above the backlight assembly, and the display panel 10 can display an image on its upper side.

[0103] In some embodiments, the backlight assembly 20 includes a backplate 407 configured to provide a supporting substrate.

[0104] In some embodiments, the backlight assembly 20 includes a lamp panel 30 on which LEDs are disposed and configured to provide backlight.

[0105] In some embodiments, the backlight assembly 20 includes a reflective sheet 404 configured to reflect the backlight of the lamp plate toward the diffuser plate direction;

[0106] In some embodiments, the backlight assembly 20 includes: a bracket 403 configured to support a diffuser plate 402, a diaphragm 401, etc., to maintain the optical spacing between the lamp plate and the diffuser plate;

[0107] In some embodiments, the backlight assembly 20 includes: a diaphragm 401;

[0108] In some embodiments, the backlight assembly 20 includes: a diffuser plate 402;

[0109] The diaphragm 401 and diffuser plate 402 are configured to improve the reflection efficiency of the backlight generated by the backlight assembly, guide light uniformly, increase brightness and color saturation, and adjust the light so that the brightness distribution of the entire display panel is more uniform.

[0110] In some embodiments, the arrangement order of the components in the backlight assembly 20 from top to bottom is as follows: diaphragm 401, diffuser plate 402, bracket 403, reflector 404, lamp plate 30, and back plate 407.

[0111] In other embodiments, the backlight assembly 20 further includes a honeycomb panel 405 and a vibrator 406, which are disposed between the lamp panel 30 and the back panel 407 and are configured to cause the backlight assembly 20 and the display panel 10 to vibrate and produce sound based on sound signals.

[0112] In some embodiments, taking a micro LED display device as an example, the backlight assembly 20 is provided with multiple lamp boards 30. After the multiple lamp boards 30 are spliced ​​together, they emit light together to provide backlight to the display panel 10. Each lamp board 30 includes multiple light-emitting areas, and each light-emitting area (also called a partition) includes multiple micro LED beads. The micro LED beads are micron-level beads such as miniLED and microLED.

[0113] The lamp board 30 is electrically connected to the driving circuit, which includes one or more driving chips. Each driving chip in each zone receives the processed backlight data sent by Bcon or Dcon, and drives the corresponding LED to emit light based on the processed backlight data, thereby realizing local backlight control of the backlight component, i.e., realizing local dimming. This enables more precise regional light control and makes the screen brightness more uniform and harmonious.

[0114] Figure 4 This is a schematic diagram of the structure of a backlight assembly 20 according to some embodiments.

[0115] In some embodiments, the backlight assembly 20 includes a plurality of LEDs 301 arranged in an array. At least one electrically connected LED forms a group of light-emitting units, which in some embodiments is referred to as a partition.

[0116] In some embodiments, the backlight assembly 20 includes a driving circuit 201, the driving circuit 201 includes a plurality of driving chips 202, the driving chip 202 is provided with a data input terminal DIN, the data input terminal DIN is coupled to the controller 250 and is configured to receive driving data.

[0117] The driver chip 202 is also provided with a power supply terminal VP and a power supply circuit 13 connected together. The power supply terminal VP is configured to receive the power supply signal VCC.

[0118] The driver chip 202 is also provided with at least one driving end, and the at least one driving end is electrically connected to the negative electrode of the corresponding light-emitting unit group. The positive electrode of the light-emitting unit group is connected to the power supply circuit 13. The light-emitting unit group is configured to obtain a power signal VLED from the power supply circuit 13 and a driving signal from the driver chip 202, and emit light based on the driving signal and the power signal.

[0119] To improve the display effect of display devices, the number of zones on the backlight assembly can be increased, thereby increasing the number of adjustable light-emitting units per unit area. When providing the same brightness per unit area, the controller can adjust more light-emitting units to achieve the target brightness. Adjusting the number of light-emitting units improves the controller's adjustment precision, thus enhancing the quality of the displayed image.

[0120] As the number of zones increases, the size of a single LED chip 301 can be reduced, and the bare LED chip 301 can be mounted onto the lamp board to increase the number of LED chips 301 per unit area on the backlight assembly 20, thereby increasing the number of zones and reducing the production cost of the backlight assembly 20. The lamp board with LED chips 301 can adapt to the increase in the number of zones and improve wiring accuracy, with little difference in production cost.

[0121] As the number of partitions increases, the number of driving terminals of each driving chip 202 in the backlight assembly 20, or the number of driving chips 202 themselves, also increases to ensure that each driving chip 202 in the driving circuit 201 meets the driving requirements of each partition. However, increasing the number of driving terminals of the driving chips 202 or increasing the total number of driving chips 202 significantly increases the production cost of the backlight assembly. Therefore, how to improve the driving capability of the driving circuit in the backlight assembly at low cost when the number of partitions increases has become a key research focus.

[0122] Therefore, some embodiments of this application provide a control method and apparatus for a display panel. The display device includes a display panel, a power supply circuit, a controller, a lamp board, and a driving circuit. The driving circuit has at least one driving end and multiple power supply ends. Each driving end corresponds to multiple light-emitting unit groups, and the multiple light-emitting unit groups and multiple power supply ends correspond to each other. When the driving circuit obtains driving data provided by the controller, it sequentially outputs power signals from multiple power supply ends to supply power to the multiple light-emitting unit groups connected to each power supply end in sequence. Then, it outputs corresponding driving signals through each driving end 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 circuit can be increased exponentially. When the number of partitions on the lamp board of the display device increases, it is not necessary to add a large number of driving ends and corresponding driving circuit structures to meet the driving requirements of the partitions, thereby achieving a low-cost improvement in the driving capability of the driving circuit in the backlight assembly.

[0123] The technical solutions of this application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0124] Figure 5A This is a schematic diagram of the structure of a display device provided in some embodiments of this application, such as... Figure 5A As shown, in some embodiments, the display device includes a power supply circuit 13 configured to provide a power signal;

[0125] In some embodiments, the display device includes a controller 250 configured to provide processed backlight data.

[0126] In some embodiments, the display device includes a backlight assembly 20 configured to emit light based on processed backlight data.

[0127] In some embodiments, the backlight assembly 20 includes a plurality of LED beads 301 arranged in an array, and at least one LED bead 301 is electrically connected to form a light-emitting unit group.

[0128] In some embodiments, individual LED beads 301 form a light-emitting unit group;

[0129] In some embodiments, at least two LED beads 301 are connected in series to form a light-emitting unit group;

[0130] In some embodiments, at least two LED beads 301 are connected in series to form at least one LED string, and at least one LED string is connected in parallel to form a light-emitting unit group.

[0131] In the above embodiments, at least two LEDs connected in series or in parallel can be LEDs arranged in rows; LEDs arranged in columns; or LEDs arranged in a preset order, and the LEDs can form regular or irregular patterns.

[0132] In some embodiments, the backlight assembly 20 includes a driving circuit 201;

[0133] In some embodiments, the drive circuit 201 is provided with multiple power supply terminals;

[0134] In some embodiments, the drive circuit 201 has a power supply terminal VP;

[0135] In some embodiments, the driving circuit 201 has at least one driving terminal;

[0136] In some embodiments, the drive circuit 201 is provided with a data input terminal DIN;

[0137] In some embodiments, the power supply terminal VP is coupled to the power supply circuit 13 and is configured to receive the power signal obtained by the power supply circuit 13.

[0138] exist Figure 5A In the example circuit structure, each data input terminal DIN is coupled to the controller 250, and each data input terminal DIN corresponds to an address information. The controller 250 is configured to transmit the corresponding drive data to each data input terminal DIN based on the address information.

[0139] In some embodiments, each output terminal of the driving circuit 202 corresponds to a plurality of light-emitting unit groups and is electrically connected to the plurality of light-emitting unit groups. The plurality of light-emitting unit groups respectively correspond to a plurality of power supply terminals, wherein the number of power supply terminals is determined by the number of light-emitting unit groups corresponding to each driving terminal.

[0140] In some embodiments, the number of power supply terminals is greater than or equal to the number of light-emitting unit groups electrically connected to each driving terminal, and the power supply terminal can provide a power signal to each light-emitting unit group accordingly.

[0141] In other embodiments, each power supply terminal is electrically connected to the input terminal of the gating device, and the output terminal of the gating device is electrically connected to the corresponding light-emitting unit group connected to each driving terminal. The total number of output terminals of the gating device electrically connected to each power supply terminal is greater than or equal to the number of light-emitting unit groups electrically connected to each driving terminal.

[0142] The driving circuit 201 is configured to obtain power signals and driving data, and based on the driving data, sequentially output power signals from the power supply end and output corresponding driving signals from the driving end to drive the corresponding LED strings at the power supply end and the driving end to emit light.

[0143] Figure 6 This is a flowchart illustrating a control method for a display device, provided as an example in this application. Figure 6 As shown, the method includes:

[0144] S101, Controller outputs drive data.

[0145] S102. The driving circuit outputs power signals sequentially from the power supply end and corresponding driving signals from the driving end based on the driving data, driving the corresponding light-emitting unit groups of the power supply end and the driving end to emit light.

[0146] by Figure 5A Taking this as an example, the control method of the display device provided in this application will be further explained.

[0147] In some embodiments, the driving circuit 201 includes a plurality of driving chips 202, each driving chip 202 having at least one driving terminal, and each driving terminal being electrically connected to at least two light-emitting unit groups. Figure 5A In the example shown, the driving circuit 201 includes three driving chips 202. Each driving terminal of each driving chip 202 is electrically connected to two light-emitting unit groups: a first light-emitting unit group and a second light-emitting unit group. The terms "first" and "second" are only used to distinguish different light-emitting unit groups and do not imply any order.

[0148] In some embodiments, the driver 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 light-emitting unit group, and the power supply terminal V2 is electrically connected to the second light-emitting unit group.

[0149] In other embodiments, each driver chip 202 is provided with a power supply terminal V1, which is electrically connected to the input terminal of a 2-to-1 multiplexer. The 2-to-1 multiplexer has one input terminal and two output terminals, which are electrically connected to the first light-emitting unit group and the second light-emitting unit group, respectively. At any given time, only one output terminal of the 2-to-1 multiplexer is connected to the input terminal.

[0150] In some embodiments, the driver chip has 4 driving terminals, so the driver chip can drive up to 8 light-emitting unit groups. Each driving terminal is electrically connected to the driving terminals of two light-emitting unit groups, and the power supply terminals of the two light-emitting unit groups are electrically connected to the corresponding power supply terminals.

[0151] In some embodiments, the light-emitting unit group includes a string of lamps consisting of multiple lamp beads connected in series. The driving end is electrically connected to the negative terminal of the two lamp strings, and the positive terminal of the two lamp strings is electrically connected to the two corresponding power supply terminals or the two output terminals of a two-to-one selector.

[0152] In this embodiment, when the driver chip drives 8 light-emitting unit groups, the driver chip selects the row of light-emitting unit groups that need to emit light based on the power supply terminal and drives the row of light strings according to the driving signals provided by different driving terminals, so as to generate the brightness corresponding to the driving signal according to the correspondence with the driving terminal, thereby realizing the driver chip's control over each light string.

[0153] In some embodiments, the multiple driving chips 202 in the driving circuit 201 are arrayed and distributed. When the display panel is scanned line by line, the multiple driving chips 202 located in the same row of multiple light-emitting unit groups form a driving group.

[0154] In some embodiments, the data input terminals of the plurality of driver chips 202 in each driver group are electrically connected to the output terminals of the controller 250, such as Figure 5A As shown, each driver 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 terminal of each driver chip 202 through a data line. The controller 250 broadcasts data including the address information to the data line. The driver chip 202 corresponding to the address information obtains the driving data from the data line to drive its corresponding light-emitting unit group to emit light.

[0155] In one embodiment, the driver chips 202 in the driver group are connected in series based on data lines, and the driver chip 202 is also provided with a data output terminal DOUT, such as... Figure 5B As shown, the data input terminal DIN of the first driver chip 202 is electrically connected to the output terminal of the controller 250, and the data input terminal DIN of the other driver chips 202 is electrically connected to the data output terminal DOUT of the previous driver chip 202.

[0156] In some embodiments, the driver data also includes the memory addresses of each driver chip, and the driver chip obtains the data terminal corresponding to its memory address from the driver data based on its memory address.

[0157] In other embodiments, the data ends obtained by each driver chip are of the same size. Then, the driver chip reads data segments of the same length from the driver data one by one. After its data segment is read, the remaining driver data is automatically shifted forward to the read position so that the subsequent driver chip can read the remaining data segments of the driver data from the read position.

[0158] When there are at least two driver groups, the first driver chip 202 in each driver group has a physical address, which serves as the physical address of the driver group it belongs to. When the controller 250 transmits driver data, it includes the physical address of each driver group in the driver data. Each driver group can simultaneously receive the driver data transmitted by the controller 250. When the physical address of the driver data matches its corresponding physical address, the driver data is transmitted one by one along the arrangement order of each driver chip 202 in the driver group to ensure the accuracy of data transmission.

[0159] In some embodiments, when the driver chip 202 has multiple power supply terminals, a power switch is provided between its power supply terminal and each power supply terminal. The driver chip controls the output power signal of each power supply terminal by controlling the conduction of the power switch.

[0160] In some embodiments, the driver chip 202 includes a control unit 2021 and a plurality of power switches, with the plurality of power switches corresponding to a plurality of power supply terminals: the first terminal of the plurality of power switches is electrically connected to the power supply terminal VP of the driver chip, and the second terminal of the plurality of power switches is coupled to the corresponding power supply terminal.

[0161] Figure 7 This is a schematic diagram of the structure of a driver chip 202 according to some embodiments, such as Figure 7 As shown, the driver 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 driver chip 202.

[0162] The control unit 2021 and the control terminals of multiple power switches are connected respectively.

[0163] In some embodiments, when the driver chip 202 further includes a multiplexer, the power supply terminal VP of the driver 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, and the control terminal of the multiplexer is electrically connected to the control unit 2021.

[0164] The control unit 2021 is also configured to drive each output of the multiple-in-one selector to be connected to the input in a preset selection order based on the drive data.

[0165] In some embodiments, the multi-to-one selector can also be equivalent to multiple power switches. In this case, the input terminal of the multi-to-one selector is electrically connected to the power supply terminal VP of the driver chip 202, and each output terminal is electrically connected to the corresponding power supply terminal.

[0166] The driver chip 202 is configured to receive the power signal VLED provided by the power supply circuit 13 from the power supply terminal, and sequentially control the multiple power switches to turn on, so that the multiple power supply terminals output power signals sequentially. It is worth noting that the multiple power supply terminals cannot output power signals simultaneously.

[0167] In some embodiments, the driver chip 202 is configured to obtain drive data from the controller 250 and determine, based on the drive data, the output control signal for each power switch.

[0168] 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 multiple power supply terminals. The driving circuit 201 is configured to output a power signal from the corresponding power supply terminal during the power supply period corresponding to the multiple pulse signal segments; the display period includes multiple power supply periods, and the multiple power supply periods do not overlap; 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;

[0169] During each power supply period, a driving signal is output based on the pulse signal segment to drive the light-emitting unit group electrically connected to the driving end to emit light.

[0170] The driver chip adjusts the conduction state of each power switch according to the acquisition state of the pulse signal segment, thereby adjusting the power supply state of each power supply terminal.

[0171] Taking the driver chip 202 with two power supply terminals as an example, the driver chip obtains the following drive data: Figure 12 The waveform diagram shown illustrates that the control unit 2021 outputs a control signal based on the rising edge of the pulse signal obtained by the state adjuster. Specifically, when the control unit obtains the rising edge of the first pulse signal, it outputs a conduction control signal for the power switch connected to the power supply terminal V2 to turn on the power switch and output the power signal VLED obtained from the power supply terminal of the driver chip from the power supply terminal V2. This continues until the control unit obtains the rising edge of the second pulse signal, at which point it stops outputting the conduction control signal for the power switch connected to the power supply terminal V2 and outputs a conduction control signal for the power switch connected to the power supply terminal V1 to output the power signal VLED obtained from the power supply terminal of the driver chip from the power supply terminal V1.

[0172] When the driver chip 202 drives multiple light-emitting unit groups, the multiple light-emitting unit groups electrically connected to the driver chip 202 correspond to multiple liquid crystal molecule groups on the display panel; each liquid crystal molecule group includes multiple liquid crystal molecules displayed simultaneously on the display panel.

[0173] The scanning direction of the liquid crystal molecules on the display panel includes a first scanning direction and a second scanning direction. Multiple liquid crystal molecules arranged along the first scanning direction are displayed in the same phase, while multiple liquid crystal molecules arranged along the second scanning direction are displayed in different phases. For example, when the liquid crystal molecules are scanned line by line 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 molecules are 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.

[0174] Each driver chip 202 is electrically connected to multiple light-emitting unit groups, which are distributed based on the first and second scanning directions of multiple liquid crystal molecule groups. There are various ways to connect the driver chip 202 and the light-emitting unit groups, as well as the arrangement of the light-emitting unit groups on the backlight assembly 20. These various situations will be explained below through multiple embodiments.

[0175] In some embodiments, the number of multiple light-emitting unit groups electrically connected to each driver chip 202 in the first scanning direction is multiple, and the number in the second scanning direction is one.

[0176] In some embodiments, the display panel scans line by line, and all light-emitting unit groups driven by the driver chip 202 are arranged in a row.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] The number of multiple light-emitting unit groups electrically connected to each driving end in the second scanning direction is one.

[0184] In some embodiments, the display panel scans line by line, and all light-emitting unit groups driven by the driver chip 202 are arranged in multiple rows, with each driver terminal electrically connected to multiple light-emitting unit groups arranged in one row.

[0185] 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 multiple columns, with multiple light-emitting unit groups electrically connected to each driver terminal arranged in one column.

[0186] The multiple light-emitting unit groups connected to the driver chip 202 are divided into multiple groups according to the division method of the previous embodiment. The connection method between each group of light-emitting unit groups and the driver chip 202 is the same as that of the previous embodiment, and will not be repeated here.

[0187] Regarding the arrangement of each group of light-emitting units, in one case, all the light-emitting units in each group are arranged in one row; in another case, the light-emitting units in each group are 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 light-emitting unit emits light in a preset order at the same time until the end of the time period.

[0188] Figure 8BThis is a schematic diagram illustrating the arrangement of light-emitting units as an example. Figure 8B In the backlight assembly, a set of light-emitting unit groups includes two light-emitting unit groups arranged in one row. When the driver chip 202 drives the light-emitting unit groups to emit light, it can control multiple light-emitting unit groups in the first row to emit light simultaneously within the same time period, and control multiple light-emitting unit groups in the second row to emit light simultaneously within the same time period. When the multiple rows of liquid crystal molecules in the display panel are scanned line by line from top to bottom, the start time of the first row's light-emitting period is earlier than the start time of the second row's light-emitting period. The delay time between the start time of the second row and the start 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 in two adjacent rows. When the backlight assembly needs to insert black bars to accommodate the response delay of the liquid crystal molecules, the delay time is the sum of the scanning delay time and the insertion time.

[0189] The circuit connection provided in this embodiment can be controlled by a group of driver chips to provide backlight to multiple rows of liquid crystal molecules in the display panel row by row, or controlled by a group of driver chips to provide backlight to multiple columns of liquid crystal molecules in the display panel column by column. This simplifies the controller's calculation and control of the row-by-row or column-by-column delay of multiple groups of driver chips.

[0190] In other embodiments, the number of multiple light-emitting unit groups electrically connected to each driving end 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 ends.

[0191] In some embodiments, the display panel scans line by line, and all light-emitting unit groups driven by the driver chip 202 are arranged in multiple rows, and the light-emitting unit groups electrically connected to each driver terminal are arranged in multiple rows.

[0192] 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 multiple columns, and the light-emitting unit groups electrically connected to each driver terminal are arranged in multiple columns.

[0193] Figure 8C This is a schematic diagram illustrating another arrangement of light-emitting unit groups as an example. Figure 8C In this configuration, if two light-emitting unit groups within a single light-emitting unit group are arranged in two rows, then the two rows of light-emitting unit groups connected to the driver chip 202 will emit light simultaneously during the same time period. The time period during which the two rows of light-emitting unit groups emit light is the scanning time period of their corresponding two rows of liquid crystal molecules.

[0194] The circuit connection provided in this embodiment utilizes multiple rows of light-emitting units to simultaneously provide backlight to multiple rows of liquid crystal molecules in the display panel, or utilizes multiple columns of light-emitting units to simultaneously provide backlight to multiple columns of liquid crystal molecules in the display panel. The control logic is simpler than that of the aforementioned embodiment and is suitable for display devices that do not have high requirements for image quality.

[0195] In the above three connection diagrams of the driver chip 202 and the light-emitting unit group, there will always be a situation where wires are connected across each other. One situation is that two wires transmitting power signals are connected across each other, and the other situation is that the wire transmitting power signals and the wire transmitting drive signals are connected across each other.

[0196] The positional relationship of the jumper wires on the lamp board is as follows: Figure 9 As shown, when a horizontal conductor needs to be bridged across a vertical conductor A, the vertical conductor is divided into two segments by conductor A: B1 and B2. Two pads are then placed on both sides of conductor A, and these two pads are connected to conductors B1 and B2 respectively. In related technologies, to address the conductor bridging issue on the lamp board, bridging devices are generally used to connect to the two pads. Because lamp boards based on miniLEDs or microLEDs have a large number of LEDs and light-emitting unit groups, the number of bridging wires required is also large, resulting in high manufacturing costs for the lamp board.

[0197] This application provides a wire bridging method, and the bridging method for two wires that need to be bridging is explained below. The bridging wires are bridging within the bridging area. In one embodiment, the two wires are copper wires. An insulating layer is coated on the copper wires to be bridging, and then a conductive layer is coated on the insulating layer to conduct the bridging wires. In one embodiment, the wire layer is copper paste. For the wire bridging point, when printing on the PCB board of the LED board, with the side where the LED is located as the top side, the LED board includes, from bottom to top, a copper wire (the wire to be bridging), an insulating layer, and a copper paste conductive layer.

[0198] The following is for reference. Figure 9 Explain the coating locations of the insulating and conductive layers. For example... Figure 9 As shown, conductor A is the conductor to be bridged. Conductors B1 and B2 need to be connected through conductor A. In the area where bridging is required, between the two pads D1 and D2, above conductor A, an insulating layer C is coated along the trace of conductor A. The width of the insulating layer C is greater than the width of the conductor A to be bridged, and it fully covers the conductor.

[0199] A first bridging conductor B1 and a second bridging conductor B2 are respectively provided on both sides of the insulating layer C along the direction perpendicular to the routing direction of the bridging trace A. The first bridging conductor B1 is connected to the first pad D1 in the bridging area, and the second bridging conductor B2 is connected to the second pad D2 in the bridging area. A 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 bridging conductor B1 and the second bridging conductor B2 are conductive and not electrically connected to the bridging trace A.

[0200] In some embodiments, when the first bridging conductor B1 and the second bridging conductor B2 are not arranged in the same row, the coating direction of the conductor layer is the direction of the straight line connecting the first pad D1 and the second pad D2.

[0201] The wire bridging method provided in this application allows for corresponding printing operations during the printed circuit board process, based on the set coating position and coating material. This simplifies the subsequent circuit board processing cost without significantly increasing the cost, thereby realizing the circuit connection method of the backlight component provided in this application.

[0202] More specifically, on a printed circuit board, the width of the conductor varies depending on the signal transmitted by the conductor. Generally, the width of the conductor transmitting power is greater than the width of the conductor transmitting drive signals.

[0203] The following example, using a driver chip with 4 driving terminals and 2 power supply terminals to drive 8 light-emitting unit groups, explains the wire connection relationship between the light-emitting unit groups and the driver chip.

[0204] exist Figure 8A In the schematic diagram of wire bridging shown, the horizontal wire is the wire that transmits the power supply signal for multiple light-emitting unit groups, and the vertical wire is the wire that transmits the power supply signal for a single light-emitting unit group. To ensure stable transmission of electrical signals, the horizontal wire is thicker than the bus wire in order to save on the printing cost of the wire.

[0205] In this case, the narrower conductor (vertical conductor) can be designated as the bridging conductor, and the wider conductor (horizontal conductor) can be designated as the bridging conductor. Since the bridging conductor is narrower, the distance between the pads on both sides of the bridging conductor is smaller, so less copper paste is used during printing, which can reduce the printing cost of copper paste.

[0206] Because copper paste has a relatively high impedance, its connection to the power supply wires has little impact on the current transmitted through those wires. However, if the copper paste is connected to the wires transmitting drive signals, its impedance may significantly reduce the current value of the drive signal, leading to abnormalities in the drive process.

[0207] exist Figure 8B In the schematic diagram of wire bridging shown, the horizontal wire is the wire that transmits the power supply signal for multiple light-emitting unit groups, the first and second vertical wires from the left are the wires that transmit the power supply signal for multiple light-emitting unit groups, and the remaining vertical wires are the wires that transmit the power supply signal for a single light-emitting unit group; then the width of the first and second wires from the left is equal to the width of the horizontal wire, and the width of the horizontal wire is greater than the width of the remaining vertical wires.

[0208] For bridging two conductors of the same width, either conductor can be selected as the conductor to be bridging, and the other conductor can be selected as the bridging conductor. Regardless of which conductor is selected as the bridging conductor, the corresponding PCB manufacturing cost is the same, and the copper paste applied to the bridging conductor produces the same impedance effect.

[0209] For bridging two wires of different widths, then according to Figure 8A The bridging method shown is used for bridging; the bridging method for the bridging wires can be referred to... Figure 10 As shown, the longitudinal conductor is used as the bridging conductor A, which is coated with an insulating layer. The transverse conductors B2 and B1 are used as bridging conductors. Copper paste is applied between the pad D2 connected to the transverse conductor B2 and the pad D1 connected to the transverse conductor B1.

[0210] exist Figure 8C In the diagram showing wire bridging, the horizontal wires transmit power signals for multiple light-emitting unit groups, and the vertical wires transmit power signals for a single light-emitting unit group. Each vertical wire is bridging a second horizontal wire. The diagram of the bridging wires is as follows: Figure 10 As shown. The bridging method of the jumper has been described. Figure 8B The examples shown will be explained in detail here, and will not be repeated here.

[0211] The following explains the control method for the backlight assembly in a display device. Figure 11 In related technologies, the controller is aimed at Figure 4 The diagram shows a waveform representation of the driving data output by the backlight assembly. Figure 11 As shown, in response to the frame start signal Vsync1, the controller determines the delay duration of the light-emitting unit group driven by the driver chip, thereby determining the light-emitting period of the light-emitting unit group. During the light-emitting period, the controller obtains backlight data from the obtained display data and generates driving data based on the backlight data.

[0212] In some embodiments, the drive data includes pulse signal segments, which comprise a plurality of consecutive pulse signals, each with the same pulse period. The controller determines the amplitude and duty cycle of the pulse signal segments based on the backlight data.

[0213] Each driver chip in the backlight assembly obtains driving data from the controller and generates driving signals based on the driving data to drive the light-emitting unit group to emit light.

[0214] In some embodiments, when the driving data includes a pulse signal segment, the driving chip determines the amplitude of the current it provides to the light-emitting unit group based on the amplitude of the pulse signal, and the driving chip determines the proportion of the duration of the current it provides to the light-emitting unit group within the display cycle based on the duty cycle of the pulse signal.

[0215] The light-emitting unit group determines the luminous brightness based on the amplitude and duration of the current in the driving chip it obtains.

[0216] When the connection relationship of the backlight components of the display device is the same as the connection relationship of the backlight components provided in this application, the controller can no longer rely on... Figure 11 The waveform diagram shown illustrates how to drive the light-emitting unit group to emit light correctly. The controller needs to provide corresponding drive signals for multiple light-emitting unit groups connected to the same output terminal.

[0217] After obtaining backlight data from the display data, the controller 250 provides multiple pulse signal segments based on the backlight data during the light-emitting period in each frame display cycle; each pulse signal segment corresponds to multiple power-supply periods, and each pulse signal segment corresponds to multiple light-emitting unit groups connected to each power supply terminal.

[0218] The driving circuit 201 is then configured to drive the light-emitting unit group corresponding to the pulse signal segment to emit light based on the pulse signal segment transmitted by the controller.

[0219] More specifically, the controller 250 obtains the pulse period corresponding to each driving terminal; the pulse period is the pulse period used to drive the light-emitting unit group when the driving terminal of the driving chip is connected to a light-emitting unit group, that is... Figure 11 The pulse period is shown. (Compared to...) Figure 13 The corresponding processing method is the same: the controller determines the emission duty cycle and amplitude of the pulse signal within the pulse period of the current frame based on the backlight data.

[0220] Based on the determined light emission duty cycle and amplitude, the controller divides each pulse period into a preset number of pulse sub-cycles (i.e., power supply periods) during the light emission period. The preset number of power supply periods corresponds to multiple power supply terminals of each driver chip. 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 multiple power supply terminals.

[0221] During each power supply period, the driver chip outputs a pulse signal segment. The duty cycle of the pulse signal segment within its pulse sub-cycle is the same as the duty cycle of the pulse signal within the pulse cycle, and the amplitude of the pulse sub-signal is the same as the amplitude of the pulse signal. This pulse signal segment can be a single pulse signal or multiple pulse signals; no specific limitation is made here.

[0222] The driver chip supplies power to its corresponding multiple light-emitting unit groups through each power supply terminal based on a preset power supply sequence. Within each pulse cycle, for each power supply terminal, the driver chip drives the corresponding light-emitting unit group to emit light based on the pulse signal segment within the power supply period corresponding to the power supply terminal.

[0223] In one embodiment, the pulse signal segment includes at least one first-level signal and / or at least one second-level signal;

[0224] The driver chip is configured to output current from the driver terminal based on the first level signal in the pulse signal segment during each power supply period, thereby driving the light-emitting unit group electrically connected to the driver terminal to emit light.

[0225] and / or

[0226] During each power supply period, based on the second level signal in the pulse signal segment, no current is output from the driving end, and the light-emitting unit group electrically connected to the driving end does not emit light.

[0227] In some embodiments, since the liquid crystal molecules on the display panel are scanned in a preset order, the light-emitting unit groups on the backlight assembly also emit light in the corresponding order. Taking the liquid crystal molecules in the display panel as being scanned line by line from top to bottom as an example, the light-emitting unit groups on the backlight assembly also provide backlight line by line. In this case, the controller 250 is configured to transmit the driving data of each light-emitting unit group line by line according to the delay duration corresponding to each line of light-emitting unit groups after obtaining the frame scan signal.

[0228] The controller 250 is also configured to obtain the frame start signal and the delay time of the liquid crystal molecule group corresponding to the light-emitting unit group;

[0229] The start time of the display cycle corresponding to the light-emitting unit group is determined based on the frame start signal and the delay duration. The delay duration of the liquid crystal molecule group includes the delay duration relative to the acquisition time of the frame start signal from the start time of the current row of liquid crystal molecules. The sum of the frame start signal and the delay duration is the start time of the display cycle corresponding to the current light-emitting display group.

[0230] The following is based on Figure 8C Taking the circuit connection shown as an example, the waveform of the drive data output by the controller will be explained. Because... Figure 8C In this context, if the negative terminals of the same group of light-emitting units are connected to the same driving terminal, then the delay time of the two rows of light-emitting units relative to the time obtained from the frame start signal Vsync is the same. Figure 8C In this process, because the driver chip has two power supply terminals, each pulse period can be evenly divided into two pulse sub-periods. Figure 8C When the driver chip shown always provides power signals in the order of power supply terminal V2 and power supply terminal V1, the waveform diagram of the drive data provided by the controller is as follows. Figure 12 As shown.

[0231] In each pulse sub-cycle, the duty cycle of the pulse signal within the pulse sub-cycle is... Figure 11The duty cycles and amplitudes shown are the same. When the driver chip receives the first pulse signal within each pulse cycle, it controls the power supply terminal V2 to output a power signal VLED, so that the positive terminal of the first row of light-emitting unit groups receives a power signal. The driver chip then outputs a drive signal from the drive terminal based on this pulse signal, so that the first row of light-emitting unit groups emits light. When the driver chip receives the second pulse signal within each pulse cycle, it controls the power supply terminal V2 to stop providing a power signal and controls the power supply terminal V1 to provide a power signal. Then, based on the drive data, it outputs a drive signal, so the first row of light-emitting unit groups does not emit light, and the second row of light-emitting unit groups emits light. This cycle repeats until the light-emitting period ends.

[0232] Since the power supply of the light-emitting unit group connected to the driver chip is provided by the driver chip itself, during the driving process of the driver chip, it is only necessary to calibrate the pulse sequence of the driving signals corresponding to the multiple light-emitting unit groups connected to the same driver end within each frame display cycle. In related technologies, PM driving uses a unified power supply method to provide power signals to the left and right light-emitting unit groups in the backlight assembly, which requires high power supply accuracy and calibrates the pulse sequence of all driver chips in the driving circuit. Therefore, the control method of this application simplifies the control difficulty.

[0233] In some embodiments, the power switch in the driver chip is a controllable transistor, such as a CMOS transistor. Since the turn-on and turn-off processes of the controllable transistor also generate significant power consumption, while the power consumption used during the turn-on process is relatively small, the power consumption of the driver chip can be reduced by decreasing the number of turn-on and turn-off cycles of the controllable transistor.

[0234] Then, it is set that within the display period of each frame, the power supply terminal at the end of any pulse cycle is the same as the power supply terminal at the beginning of the next pulse cycle, and the power supply terminal at the end of any pulse cycle remains in a power supply state until the second power supply terminal of the next pulse cycle is powered.

[0235] against Figure 8CThe circuit shown allows the driver chip to control two power supply terminals to provide power signals in the order of power supply terminals V2 and V1 during the light-emitting period. This power supply signal is then used to sequentially drive the first and second rows of light-emitting units to emit light. During the second pulse period, the power switch corresponding to power supply terminal V1 is kept on at the end of the first pulse period. During the second pulse period, the two power supply terminals are controlled to provide power signals in the order of power supply terminals V1 and V2, and the driving signal supply is adjusted accordingly to sequentially drive the second and first rows of light-emitting units to emit light. At the end of the second pulse period, the power switch corresponding to power supply terminal V2 is kept on. During the third pulse period, the two power supply terminals are controlled to provide power signals in the order of power supply terminals V2 and V1 to sequentially drive the first and second rows of light-emitting units to emit light. This process continues until the light-emitting period ends. The waveform generated by the controller 250 is as follows: Figure 13 As shown.

[0236] In some embodiments, considering the unstable state of the liquid crystal molecules at the beginning of the display cycle, the display cycle is divided into a black insertion period and an emission period. The black insertion period includes the unstable state period of the liquid crystal molecules.

[0237] The unstable period of the liquid crystal molecule group is the angle adjustment process of the liquid crystal molecules from the deflection angle applied when displaying the previous frame to the deflection angle applied when displaying the current frame. When the rotation angle is greater than or equal to the product of the preset ratio and the deflection angle difference, the liquid crystal molecules are determined to be in a stable period; when the rotation angle is less than the product of the preset ratio and the deflection angle difference, the liquid crystal molecules are determined to be in an unstable period.

[0238] The controller prevents ghosting between adjacent frames by controlling the light-emitting unit group to not emit light during the unstable period of the liquid crystal molecule group.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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 15 As shown. 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 within the display cycle.

[0246] In some embodiments, the controller 250 employs combined dimming, meaning that during the display of one frame, the current amplitude in the drive data provided by the controller 250 is the same, and different duty cycles correspond to different light emission durations, thereby corresponding to different values ​​in the backlight data. Specifically, the larger the value in the backlight data, the brighter the brightness required from the light-emitting unit group in the backlight assembly needs to be, and the larger the duty cycle in the drive data provided by the controller for that light-emitting unit group; conversely, the smaller the value in the backlight data, the smaller the duty cycle in the drive data provided by the controller for the light-emitting unit group.

[0247] When the controller 250 uses combined dimming to display different frames, the amplitudes in the drive data generated based on the backlight data are not entirely the same. Applying combined dimming allows the control method provided in this application to control the backlight provided by the backlight component more delicately, resulting in better image quality in display devices using this backlight component.

[0248] In some embodiments, the controller 250 obtains the power supply status of the light-emitting unit group through the driving circuit, and controls the power supply circuit to adjust the voltage value it provides based on the power supply status. To simplify the circuit structure, the current-voltage relationship of the light-emitting unit group is stored in advance in the controller 250 or its accessible memory; the image data includes backlight data, and the current-voltage relationship of the light-emitting unit group characterizes the current value flowing through the light-emitting sub-unit when different power supply voltage values ​​are applied;

[0249] In some embodiments, driving data corresponding to each light-emitting sub-unit is generated based on backlight data; the driving data includes current value and duty cycle; the current value corresponding to each light-emitting sub-unit is the same.

[0250] In some embodiments, based on the current-voltage relationship, the supply voltage value corresponding to the current value is determined, and the supply voltage value corresponding to the target current value is output to the light-emitting unit group.

[0251] In some embodiments, when determining the current-voltage relationship of the light-emitting unit group, the controller determines the minimum supply voltage that the power supply circuit can provide, and determines the current value at which each light-emitting unit group is in an overvoltage state based on the minimum supply voltage as the first sampling point for fitting the relationship.

[0252] The controller controls the drive circuit to provide at least one preset current value and adjusts the supply voltage so that the voltage value is the minimum overvoltage value of each light-emitting unit group;

[0253] Based on the aforementioned multiple current-voltage sampling points, the current-voltage relationship is fitted. This eliminates the need for the power supply circuit to obtain feedback signals related to the light-emitting unit group from the driving circuit when determining the power supply voltage. Therefore, it no longer occupies the transmission path of driving data or requires a separate data line, ensuring the transmission rate of driving data and the simplicity of the circuit structure. Furthermore, since the current-voltage relationship of the light-emitting sub-units is pre-fitted, the consistency of the backlight circuit based on joint dimming ensures the accuracy of determining the power supply voltage, thereby guaranteeing display accuracy.

[0254] In some embodiments, the backlight assembly further includes a power supply control chip 251, which is connected to the power supply output terminal of the power supply circuit, the power supply terminal of the drive circuit, and the output terminal of the controller 250, respectively, as shown in the circuit connection relationship. Figure 16 As shown, when the power supply control chip 251 receives a drive signal, it supplies power to the corresponding drive chip and outputs a drive signal so that the drive chip drives the light string to light up based on the drive signal.

[0255] The power supply control chip 251 is also configured to stop supplying power and providing drive signals to its corresponding driver chip when no drive signal is received, so that the driver chip stops driving the LED string to emit light, thereby reducing leakage current and reducing losses during the standby process of the display device.

[0256] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0257] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, include: The controller is configured to output drive data; The power supply circuit is configured to output a power supply signal VCC and a backlight power supply signal VLED. A light panel, an array of LED beads, at least one LED bead electrically connected to form a light-emitting unit group, and at least two light-emitting unit groups exist; Multiple driver chips, of which at least two are connected in series, wherein each driver chip is equipped with: At least two driver chips are connected in series at the data input terminal. The data input terminal of the first driver chip is connected to the controller and is configured to receive the driver data. At least two driver chips are connected in series at the data output end. The data input end of the other driver chips is connected to the data output end of the previous driver chip and is configured to output the driving data. The driving data includes multiple pulse signal segments, and the pulse signal segments correspond to the power supply period of the light-emitting unit group. The power supply terminal is connected to the power supply circuit and is configured to receive the power signal VCC. At least one driving end, and at least one driving end is electrically connected to the negative electrode of the corresponding light-emitting unit group; The VLED terminal is connected to the power supply circuit and is configured to receive the backlight power supply signal VLED. Multiple power supply terminals, each power supply terminal being connected to the positive electrode of one of the at least two light-emitting unit groups; Multiple power switches are provided, and multiple power supply terminals are provided. The first terminal of each power switch is electrically connected to the VLED terminal, and the second terminal of each power switch is electrically connected to the corresponding power supply terminal. The control unit is configured to control the driving terminal to drive the corresponding light-emitting unit group to emit light based on multiple pulse signal segments during each power supply period. Furthermore, based on multiple pulse signal segments, multiple power switches are sequentially controlled to turn on, so that multiple power supply terminals sequentially output the backlight power supply signal VLED to the corresponding light-emitting unit group.

2. The display device according to claim 1, characterized in that, The pulse signal segment includes at least one first-level signal and / or at least one second-level signal; The control unit is configured to: During each of the power supply periods, based on the first level signal in the pulse signal segment, the output current of the driving terminal is controlled so that the light-emitting unit group electrically connected to the driving terminal emits light; and / or During each of the power supply periods, based on the second level signal in the pulse signal segment, the driving terminal is controlled not to output current, so that the light-emitting unit group electrically connected to the driving terminal does not emit light.

3. The display device according to claim 2, characterized in that, The control unit is configured to: Before sequentially controlling the multiple power switches to turn on based on multiple pulse signal segments, so that multiple power supply terminals sequentially output the backlight power supply signal VLED to the corresponding light-emitting unit group, the method further includes: Based on multiple pulse signal segments, the power supply terminal that supplies power at the end of the display cycle is the same as the power supply terminal that supplies power at the beginning of the next display cycle.

4. The display device according to claim 1, characterized in that, During a single power supply period, only one power supply terminal outputs the backlight power supply signal VLED.

5. The display device according to claim 1, characterized in that, The controller is configured to: Obtain display data, including backlight data; Based on the backlight data, multiple pulse signal segments are provided during multiple power supply periods, so that the driving chip drives the corresponding light-emitting unit group to emit light based on the pulse signal segments; The pulse signal segment corresponds to the plurality of power supply time periods, and each pulse signal segment corresponds to the plurality of light-emitting unit groups connected to each power supply terminal; The power supply period is the period during which each light-emitting unit group electrically connected to the driving end receives power from its corresponding power supply end. The arrangement order of each power supply period within the display cycle is the same as the power supply order of each power supply end of the driving circuit.

6. The display device according to claim 5, characterized in that, The controller is configured to: Based on the backlight data, determine the emission duty cycle and amplitude of the pulse signal segment during the power supply period; During the power supply period, the pulse signal segment is output based on the emission duty cycle and the amplitude.

7. The display device according to claim 6, characterized in that, The display device further includes: The display panel includes: The liquid crystal molecules are arranged in an array, and at least one liquid crystal molecule displayed simultaneously constitutes a liquid crystal molecule group; the display period is the same as the scanning period of the liquid crystal molecule group corresponding to the plurality of light-emitting unit groups.

8. The display device according to claim 7, characterized in that, The controller is configured to: Before obtaining the multiple power supply periods corresponding to each drive terminal of the drive circuit, the method further includes: Obtain the frame start signal and the delay time of the liquid crystal molecule group corresponding to the light-emitting unit group; Based on the frame start signal and the delay duration, the display cycle corresponding to the light-emitting unit group is determined.

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