Display apparatus

Abstract

Disclosed in the present application is a display apparatus. In the display apparatus, a driver is configured to be directly connected to at least two light-emitting unit groups capable of emitting light of at least two wavelengths, and compared with conventional field-sequential display technologies in which different drivers are provided for light-emitting diodes emitting light of different wavelengths, the present application simplifies wiring by means of connecting the at least two light-emitting unit groups to a single driver. In addition, after collecting output electrical signals that are output by the at least two light-emitting unit groups, the driver directly determines, on the basis of a drive signal and the output electrical signals, a corresponding feedback signal used for indicating whether the output electrical signals meet emission conditions of the at least two light-emitting unit groups, such that field-sequential display operations including driving and voltage feedback of the at least two light-emitting unit groups are implemented by means of the single driver.

Description

A display device

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202411977278.4, filed on December 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to display technology, and to, but is not limited to, a display device. Background Technology

[0004] As LCD TVs move towards larger sizes and ultra-high definition, their high power consumption has become an increasingly prominent issue. To reduce LCD TV power consumption, the industry has conducted research in various aspects, such as improving the transmittance of LCD panels and using local dynamic dimming technology. Among these, field-sequential color LCD technology has attracted industry attention due to its low power consumption advantage and broad application potential.

[0005] Typically, field-sequence displays use multi-color backlighting, such as RGB. The current conventional solution is to drive each LED separately based on different voltages. That is, all LEDs emitting red light (R) are driven by the same driver, all LEDs emitting green light (G) are driven by the same driver, and all LEDs emitting blue light (B) are driven by the same driver. Furthermore, the power supply voltage of the LEDs emitting red light is different from that of the other two types of LEDs, so different power supply voltages need to be provided for these three types of LEDs. However, this design leads to problems such as increased driver complexity, increased driver cost, and complex PCB layout. Summary of the Invention

[0006] This application provides a display device comprising: a display panel; a power supply circuit electrically connected to the display panel for outputting a power supply signal; a backlight assembly connected to the power supply circuit for emitting light of at least two wavelengths based on the power supply signal; and a controller connected to both the power supply circuit and the backlight assembly for receiving and outputting a driving signal to the backlight assembly to drive the backlight assembly to emit light of at least two wavelengths based on a frame of image data. The backlight assembly includes: at least two light-emitting unit groups connected to the power supply circuit, each light-emitting unit group including multiple light-emitting diodes (LEDs) electrically connected to each other, each light-emitting unit group emitting light of at least two wavelengths based on the power supply signal; and a driver including a power supply terminal, a data transmission terminal, and at least two driving terminals for receiving the driving signal through the data transmission terminal and driving the display panel through the at least two driving terminals according to the driving signal. At least two light-emitting unit groups emit at least two light fields; and, when the power supply circuit outputs the power supply signal to the at least two light-emitting unit groups, the output electrical signal output by the at least two light-emitting unit groups is acquired, and a feedback signal corresponding to the at least two light-emitting unit groups is obtained based on the output electrical signal and the driving signal, and the feedback signal is output to the controller; wherein, the power supply terminal is connected to the power supply circuit, different driving terminals are connected to different light-emitting unit groups, and the data transmission terminal is connected to the controller; the driver; the feedback signal is used to indicate whether the output electrical signal meets the emission conditions of the at least two light-emitting unit groups, the emission conditions being determined based on the driving signal; the controller, based on the feedback signal, controls the power supply circuit to adjust the electrical parameters of the power supply signal so that the output electrical signal meets the emission conditions of the at least two light-emitting unit groups. Attached Figure Description

[0007] Figure 1 is a schematic diagram of the structure of the display device provided in an embodiment of this application;

[0008] Figure 2 is a schematic diagram of the backlight assembly provided in an embodiment of this application;

[0009] Figure 3 is another structural schematic diagram of the display device provided in an embodiment of this application;

[0010] Figure 4 is another structural schematic diagram of the display device provided in an embodiment of this application;

[0011] Figure 5 is a schematic diagram of the controller and driver provided in an embodiment of this application;

[0012] Figure 6 is a schematic diagram of the controller and another driver provided in an embodiment of this application;

[0013] Figure 7 is a schematic diagram of the implementation structure of the controller and driver provided in the embodiments of this application;

[0014] Figure 8 is a schematic diagram of the implementation structure of the controller and another driver provided in the embodiment of this application;

[0015] Figure 9 is a schematic diagram of the implementation structure of the controller and another driver provided in the embodiment of this application;

[0016] Figure 10 is a schematic diagram of the structure of the driver and light-emitting unit group provided in the embodiment of this application;

[0017] Figure 11 is a schematic diagram of the implementation structure of the driver and light-emitting unit group provided in the embodiment of this application;

[0018] Figure 12 is a schematic diagram of the control flow of the controller provided in an embodiment of this application;

[0019] Figure 13 is a schematic diagram of the feedback signal provided in an embodiment of this application;

[0020] Figure 14 is another schematic diagram of the feedback signal provided in the embodiment of this application. Detailed Implementation

[0021] Figure 1 is a schematic diagram of the structure of the display device provided in an embodiment of this application. As shown in Figure 1, the display device may include a controller 102, which can be used to receive video input signals or image input signals, obtain backlight data and display data from the video input signals or image input signals, perform format conversion, timing control and other processing on the backlight data and display data to obtain corresponding drive signals and output them.

[0022] In some embodiments, the controller 102 may include a system-on-chip (SOC) controller that performs operations such as format conversion, data processing, and image rendering on the input signals obtained from external input ports or network ports.

[0023] In some embodiments, controller 102 may include a timing controller (Tcon) for timing control output of the data it acquires.

[0024] In some embodiments, the timing controller 102 performs data format conversion.

[0025] In some embodiments, controller 102 may include a backlight controller (Bcon) or a dimming controller (DCON), which generates and outputs driving data in order to obtain processing data associated with backlight data.

[0026] In some embodiments, the display device includes a display panel 104 coupled to a controller 102. The display panel 104 includes liquid crystal molecules that are deflected for received processed display data.

[0027] In some embodiments, the display device includes a backlight assembly 103 coupled to a controller 102, the backlight assembly 103 emitting light based on driving data. The display panel 104 can display an image based on the backlight provided by the backlight assembly 103.

[0028] In some embodiments, the backlight assembly 103 includes a driver 1031, which is coupled to a controller 102. The driver 1031 includes a plurality of drivers 1031, which generate drive signals based on drive data.

[0029] In some embodiments, the backlight assembly 103 further includes a lamp board, which includes an array of light-emitting diodes. At least one light-emitting diode is connected to form a light-emitting unit group 1032. The light-emitting unit group 1032 is electrically connected to a driver 1031 to emit light based on a driving signal.

[0030] In some embodiments, in a light-emitting unit group 1032, at least one light-emitting diode is connected in series to form a light string; in a light-emitting unit group 1032, at least one light-emitting diode is connected in parallel; after at least one light-emitting diode in a light-emitting unit group 1032 is connected in series to form a light string, at least one light string is connected in parallel.

[0031] The light string can be a string of light-emitting diodes connected in series from left to right or from right to left, or a string of light-emitting diodes connected in series from top to bottom or bottom to top, or a string of light-emitting diodes connected in series according to a preset order (e.g., rotation, bending, etc.).

[0032] In some embodiments, the display device includes a power supply circuit 101, which is coupled to a controller 102, a backlight assembly 103, and a display panel 104. The power supply circuit 101 provides corresponding power signals to the controller 102, the display panel 104, and / or the backlight assembly 103.

[0033] In some embodiments, the power supply terminals of the power supply circuit 101 and each light-emitting unit group 1032 in the backlight assembly 103 are connected to provide a backlight power supply signal VLED so that the light-emitting unit group 1032 emits light when it receives the backlight power supply signal VLED and the driving signal provided by the driver 1031.

[0034] In some embodiments, the display device may include an image processor, the image data including display data and backlight data, the image processor may send the image data to the controller 102 after obtaining a frame of image data, so that the controller 102 obtains a drive signal according to the image data, wherein the display data is data for controlling the rotation angle of the liquid crystal molecules of the display panel 104, and the backlight data is data for controlling the backlight assembly 103 to provide backlight.

[0035] In some embodiments, the controller 102 may output a driving signal corresponding to each light-emitting unit group 1032 based on the backlight data in the image data. The driving signal includes a current value and a duty cycle. The current value corresponding to each light-emitting unit group 1032 is the same.

[0036] The controller 102 adjusts the brightness of the corresponding light-emitting unit group 1032 in the backlight assembly 103 by controlling the duty cycle. The larger the duty cycle, the brighter the brightness; the smaller the duty cycle, the lower the brightness.

[0037] Figure 2 is a schematic diagram of a backlight assembly 103 provided in an embodiment of this application. As shown in Figure 2, the backlight assembly 103 includes a plurality of light-emitting diodes arranged in an array, and at least one light-emitting diode electrically connected to form a light-emitting unit group 1032.

[0038] In some embodiments, the backlight assembly 103 may include a driver 1031, which has a data input terminal DIN connected to the controller 102 and configured to receive drive data; the driver 1031 also has a power supply terminal connected to the power supply circuit 101, which is configured to receive the power signal output by the power supply circuit 101.

[0039] The driver 1031 is also provided with at least one driving end, and the at least one driving end is electrically connected to the negative terminal of the corresponding light-emitting unit group 1032. The positive terminal of the light-emitting unit group 1032 is connected to the power supply circuit 101. The light-emitting unit group 1032 is configured to obtain a power supply signal VLED from the power supply circuit 101 and a driving signal from the driver 1031, and emit light based on the driving signal and the power supply signal.

[0040] To improve the display effect of a display device, the number of zones on the backlight assembly 103 can generally be increased, thereby increasing the number of adjustable light-emitting unit groups 1032 per unit area on the backlight assembly 103. When providing the same brightness per unit area, the controller 102 can achieve the target brightness by adjusting more light-emitting unit groups 1032. Adjusting the number of light-emitting unit groups 1032 improves the adjustment accuracy of the controller 102, thereby improving the quality of the displayed image. However, as the number of zones increases, the number of driving terminals of each driver 1031 in the backlight assembly 103 or the number of drivers 1031 also increases to ensure that each driver 1031 meets the driving requirements of each zone. However, increasing the number of driving terminals of drivers 1031 or the number of drivers 1031 will significantly increase the production cost of the backlight assembly 103.

[0041] Meanwhile, when designing a multi-color display device, since the power supply voltage of light-emitting diodes emitting light of different wavelengths is different, the power supply circuit 101 needs to output power supply signals of different voltages to different light-emitting diodes. Therefore, in order to distinguish different power supply signals, the light-emitting unit group 1032 electrically connected to the driver 1031 is usually composed of light-emitting diodes emitting light of the same wavelength. When the display device includes light-emitting diodes that can emit light of multiple wavelengths, multiple drivers 1031 are usually required. Different drivers 1031 are connected to light-emitting diodes emitting light of different wavelengths, which leads to complex wiring between the driver 1031 and the light-emitting diodes, which is not conducive to wiring and increases the design cost.

[0042] Based on the above problems, this application provides a display device. By connecting a driver 1031 to at least two light-emitting unit groups 1032, the at least two light-emitting unit groups 1032 can emit light of at least two wavelengths. Continuing as shown in Figure 2 above, compared with the conventional technology of providing different drivers 1031 for light-emitting diodes emitting different wavelengths of light, this application does not require different drivers 1031 for different power supply voltages, simplifying the wiring. At the same time, after the driver 1031 collects the output electrical signals output by at least two light-emitting unit groups 1032, it directly determines the corresponding feedback signal to indicate whether the output electrical signal meets the emission conditions of at least two light-emitting unit groups 1032 based on the driving signal and the output electrical signal. This further realizes that the overall process of controlling at least two light-emitting unit groups 1032, including driving and voltage feedback, can be achieved with only a single driver 1031.

[0043] To facilitate understanding, let me first introduce the field sequence display mentioned in this application. Field sequence display refers to the use of multi-primary-color backlight. The display device drives different types of LEDs in the backlight assembly in sequence to circulate light of different wavelengths, thereby achieving color display without the need for a color filter.

[0044] During the display process, taking RGB (Red, Green, Blue) display as an example, within a single frame, the backlight assembly sequentially refreshes the backlights of the three primary colors (R, G, and B), displaying different colored sub-images on the display panel. Utilizing the hysteresis effect of the human eye, the three primary colors are fused in time, and multiple sub-images are ultimately synthesized into a colored image in the human eye. In the display process, a color field (frame) contains three consecutive sub-frames (fields) in sequence. During a single sub-frame, red pixel data is written first, then the red backlight is illuminated to form a red field, displaying the red pixel image data on the display panel. Next, during the next sub-frame, green pixel data is written, then the green backlight is illuminated to form a green field, displaying the green pixel image data on the display panel. Finally, during the last sub-frame, blue pixel data is written, then the blue backlight is illuminated to form a blue field, displaying the blue pixel image data on the display panel. The light stimuli from these three consecutive color fields are incident on the human eye, and after being processed by the visual system, a color image (color frame) is formed. In this way, a frame of image data is divided into several molecular fields according to the R, G, B order. Then, the LED light corresponding to each pixel is selected in some R, G, B molecular fields and cut off in other R, G, B molecular fields, thus displaying different colors of the image.

[0045] When the display process of a new frame of image data begins, the controller 102 processes the three parallel digital signals (R, G, and B) of the current frame of image data according to the display requirements. The R, G, and B signals are divided into multiple molecular fields, and the grayscale signals from the R, G, and B signals are sent to the driver 1031. This controls different color molecular fields to generate different colors of light. Simultaneously, the corresponding driver 1031, based on the synchronization signal, performs the "on" and "off" actions of each LED in each light-emitting unit group, thereby completing the display of the color image. The controller independently controls at least two light-emitting unit groups. That is, when the controller emits light based on a frame of image data, it can control each light-emitting unit group to emit different colors of light, or it can control each light-emitting unit group to emit the same color of light.

[0046] It should be understood that the display process of the display device can be divided into a driving process and a feedback process. During the driving process, the controller 102 will obtain a driving signal and drive each light-emitting unit group 1032 to emit light based on the driving signal. During the feedback process, the driver 1031 will generate and output a feedback signal based on the collected output electrical signals of each light-emitting unit group 1032.

[0047] 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.

[0048] In some embodiments, as shown in FIG3, the LEDs in each light-emitting unit group 1032 are divided into at least two categories according to the different wavelengths of the emitted light. LEDs of the same category are connected in series, and different driving terminals are connected to LEDs of different categories. Among them, the at least two categories of LEDs include at least one of LEDs emitting red light (R), LEDs emitting green light (G), LEDs emitting blue light (B), and LEDs emitting white light (W). The specific configuration can be made by those skilled in the art according to the actual situation, and the embodiments of this application do not impose any limitations.

[0049] During the driving process, as shown in Figure 4, taking at least two types of LEDs, including LEDs emitting red light (R), LEDs emitting green light (G), and LEDs emitting blue light (B), as an example, each light-emitting unit group 1032 includes multiple R, multiple G, and multiple B LEDs connected in series. The power supply circuit 101 is connected to the positive terminal of each LED in the light-emitting unit group 1032, and the driver 1031 is connected to the negative terminal of each LED in the light-emitting unit group 1032. Since the multiple red LEDs are connected in series, the driver 1031 drives the multiple red LEDs based on the same sub-driving signal. That is, after the driver 1031 outputs the sub-driving signal corresponding to the red LED, the multiple series-connected red LEDs will synchronously emit red light according to that sub-driving signal.

[0050] The driver 1031 may include a first driver D1, a second driver D2, and an nth driver 1031Dn. The anodes of the RGB of the first light-emitting unit group 1032 to the RGB of the nth light-emitting unit group 1032 can all receive a positive voltage VLED applied by the power supply circuit 101. The first driver D1, the second driver D2, and the nth driver 1031Dn can adjust the intensity of the light output from the first light-emitting unit group 1032 to the nth light-emitting unit group 1032 according to the magnitude of the RGB output current of each light-emitting unit group 1032.

[0051] In some embodiments, as shown in FIG5, the controller 102 and the driver 1031 can transmit drive signals and feedback signals through the same channel. That is, the controller 102 includes a first port, and the controller 102 is connected to the data transmission terminal of the driver 1031 through the first port to form a signal transmission channel, thereby transmitting drive signals and feedback signals through the signal transmission channel.

[0052] During the process of the controller 102 sending the drive signal to the driver 1031, the controller 102 sends the drive signal to the data transmission terminal of the driver 1031 through the first port, thereby completing the transmission and reception of the drive signal; during the process of the driver 1031 sending the feedback signal to the controller 102, the driver 1031 sends the feedback signal to the first port of the controller 102 through the data transmission terminal, thereby completing the transmission and reception of the feedback signal.

[0053] It is understandable that by setting the controller 102 and the driver 1031 to transmit drive signals and feedback signals through the same channel, the number of connection ports of the controller 102 can be reduced.

[0054] In some other embodiments, as shown in FIG6, the controller 102 and the driver 1031 can also transmit drive signals and feedback signals through different channels. That is, the driver 1031 also includes a signal feedback terminal, and the controller 102 includes a second port and a third port. The controller 102 is connected to the data transmission terminal through the second port, and the controller 102 is connected to the signal feedback terminal through the third port, forming two signal transmission channels, thereby transmitting drive signals and feedback signals through the two signal transmission channels respectively.

[0055] During the process of the controller 102 sending the drive signal to the driver 1031, the controller 102 sends the drive signal to the data transmission terminal of the driver 1031 through the second port, thereby completing the transmission and reception of the drive signal; during the process of the driver 1031 sending the feedback signal to the controller 102, the driver 1031 sends the feedback signal to the third port of the controller 102 through the signal feedback terminal, thereby completing the transmission and reception of the feedback signal.

[0056] It is understandable that by setting the controller 102 to transmit drive signals and feedback signals through different ports, the transmission and reception conflicts when the controller 102 sends drive signals and receives feedback signals can be avoided, thereby improving the reliability of signal transmission and reception.

[0057] In some embodiments, the number of drivers 1031 is at least two. The at least two drivers 1031 can be connected in series or in parallel. The drive signal includes at least two sub-drive signals, and each of the at least two sub-drive signals corresponds one-to-one with the at least two drivers 1031. The connection relationship between the at least two drivers 1031 and the controller 102 can be referred to the structural relationship shown in Figures 5 and 6.

[0058] It should be understood that, since the controller is connected to at least two drivers, when the controller drives at least two drivers, the controller needs to drive at least two drivers separately. For example, when at least two drivers are connected in series, the drive signal sent by the controller includes at least two sub-drive signals, and the at least two sub-drive signals correspond one-to-one with at least two drivers 1031. Thus, after the controller sends drive signals to the connected drivers, the at least two drivers can perform drive according to the at least two sub-drive signals. When at least two drivers are connected in parallel, the controller needs to send drive signals to different drivers through different ports to drive different drivers to perform drive.

[0059] In some embodiments, if at least two drivers 1031 are connected in series, at least two sub-drive signals correspond one-to-one with at least two drivers 1031, and controller 102 is connected to the at least two drivers 1031 connected in series, wherein:

[0060] Controller 102 is used to output drive signals, the drive signals including sub-drive signals corresponding to each of at least two drivers 1031;

[0061] The target driver 1031 is used to drive at least two light-emitting unit groups 1032 connected to the target driver 1031 to emit light according to the target sub-driving signal when a corresponding target sub-driving signal is received. The target driver 1031 is at least one of the at least two drivers 1031.

[0062] For ease of understanding, based on the structure shown in Figure 5, the following example illustrates the interconnection of at least two drivers 1031, as shown in Figure 7: The controller 102 sends a drive signal to the first driver through the first port. After receiving the drive signal sent by the controller 102, the first driver obtains and drives at least two light-emitting unit groups 1032 according to the sub-drive signal corresponding to the first driver in the drive signal. Then, it sends the drive signal to the second driver connected to the first driver. The second driver drives at least two light-emitting unit groups 1032 connected to the second driver according to the drive signal output by the first driver. Then, it sends the drive signal to the subsequent third driver, and so on.

[0063] It is understandable that by connecting at least two drivers 1031 in series with the controller 102, the controller 102 can simultaneously control and drive multiple light-emitting unit groups 1032, thereby improving driving and feedback efficiency.

[0064] However, in the structure shown in Figure 7, when at least two drivers 1031 send feedback signals to the controller 102, they need to start sending feedback signals from the last driver 1031 in series. For example, after the second driver receives the feedback signal, it needs to send the feedback signal corresponding to the second driver to the first driver. The first driver then sends the feedback signals corresponding to the first driver and the second driver to the controller 102, thus completing the transmission of feedback signals to the first driver and the second driver. The entire driving and feedback process requires passing through at least two drivers 1031 on both sides, which places a high processing load on each driver and is detrimental to driving efficiency.

[0065] In some embodiments, the display device can be configured with multiple drivers 1031 based on the structure shown in FIG6. For example, as shown in FIG8, the controller 102 sends a drive signal to the first driver through the second port. After receiving the drive signal, the first driver generates a corresponding first feedback signal based on the output electrical signals of at least two light-emitting unit groups 1032 collected. Then, the first feedback signal and the drive signal are sent to the second driver through the signal feedback terminal. After receiving the drive signal, the second driver generates a corresponding second feedback signal based on the output electrical signals of at least two light-emitting unit groups 1032 collected. Then, the first feedback signal and the second feedback signal are sent to the controller 102 through the signal feedback terminal, thereby completing the transmission of the feedback signal.

[0066] In some embodiments, each driver 1031 may amplify the drive signal when outputting the drive signal, so that when the subsequent driver 1031 receives the drive signal, the drive signal can have better signal characteristics, such as low bit error rate (BER) and / or high signal-to-noise ratio (SNR).

[0067] In some embodiments, the sub-driving signal may include a delay duration. The delay duration of each driver 1031 is different, with the first driver having the longest delay duration and the last driver 1031 to receive the sub-driving signal having the shortest delay duration. This ensures that each driver 1031 drives synchronously after at least two drivers 1031 have received their respective sub-driving signals, thereby achieving the optimal synchronous display effect of each light-emitting unit group 1032.

[0068] Because the number of device interfaces limits the number of light-emitting unit groups 1032 that a single driver 1031 can connect to, the number of light-emitting unit groups 1032 that can be connected to is also limited. If the number of light-emitting unit groups 1032 in the display device is too large, the synchronous driving requirements of the display device cannot be met if the connection is still a single connection between at least two drivers 1031 connected in series.

[0069] Therefore, in some embodiments, at least two drivers 1031 can be configured to be divided into multiple groups, with the drivers 1031 in each group connected in series and the drivers 1031 in each group connected in parallel.

[0070] As shown in Figure 9, at least two drivers 1031 are divided into N groups, each group including m drivers 1031. The first group of drivers includes drivers 1-1, 1-2, ..., 1-m connected in series. The Nth group of drivers 1031 includes drivers N-1, N-2, ..., Nm connected in series. The N groups of drivers 1031 are connected in parallel with the controller 102. The controller 102 outputs drive signals to the data transmission terminals of the N groups of drivers 1031 through N second ports. The N groups of drivers 1031 output feedback signals to the third port of the controller 102 through different data transmission channels.

[0071] In some embodiments, during the driving process, the controller 102 first sends a driving signal to the target driver 1031 based on the preset calibration information of the target driver 1031, so that the target driver 1031 obtains the corresponding driving signal, and the driver 1031 drives each light-emitting unit group 1032.

[0072] For example, at least two drivers 1031 include a first driver, a second driver, and a third driver. The first driver is used to drive light-emitting unit groups 1032a, 1032b, and 1032c; the second driver is used to drive light-emitting unit groups 1032d, 1032e, and 1032f; and the third driver is used to drive light-emitting unit groups 1032g, 1032h, and 1032i. The first driver, the second driver, and the third driver correspond to different preset calibration information. When the controller 102 receives a drive signal, it adds the corresponding preset calibration information to the sub-drive signal corresponding to each driver 1031.

[0073] There are several ways to set the preset calibration information for driver 1031, and the following are examples:

[0074] In one method, the display device may include an address chip, which is located between the controller 102 and the driver 1031. The address chip contains an address, and the preset calibration information of the driver 1031 includes the address of the address chip corresponding to the driver 1031.

[0075] For example, at least two drivers 1031 include a first driver, a second driver, a third driver, and a fourth driver. A first address chip is disposed between the controller 102, the first driver, and the second driver, and a second address chip is disposed between the third driver and the fourth driver. The controller 102 first sends the sub-drive signals corresponding to the first driver and the second driver to the first address chip according to the preset calibration information of the driver 1031, so that the first address chip distributes the drive signals to the first driver and the second driver. At the same time, the controller 102 sends the sub-drive signals corresponding to the third driver and the fourth driver to the second address chip according to the preset calibration information of the driver 1031, so that the second address chip distributes the drive signals to the third driver and the fourth driver.

[0076] In this embodiment, the preset calibration information of the driver 1031 is set by setting an additional address chip, which will not affect the driver 1031 and thus improves the versatility of the driver 1031.

[0077] In some embodiments, the address chip distributes the drive signal by dividing the drive signal into at least two sub-drive signals, each sub-drive signal corresponding to one of two drivers 1031. The data length of each sub-drive signal can be the same or different, depending on the number of light-emitting unit groups 1032 connected to the driver 1031. This eliminates the need for the controller 102 to perform additional division of the drive signal, reducing its processing load and improving the efficiency of the driver 1031 in receiving drive signals.

[0078] Method 2: The driver 1031 has a physical address set inside. Different drivers 1031 have different physical addresses. The preset calibration information of the driver 1031 includes the physical address of the driver 1031.

[0079] Before the controller 102 sends the drive signal, the controller 102 can divide the drive signal into multiple sub-drive signals according to the physical address of the driver 1031, and identify the physical address corresponding to each sub-drive signal, so that after at least two drivers 1031 receive the drive signal, they can receive their respective sub-drive signals according to the physical address corresponding to each sub-drive signal.

[0080] In this embodiment, the physical address of the driver 1031 is preset by the controller 102, so that the controller 102 can send drive signals to multiple drivers 1031 with different physical addresses with one more data line, without having to set multiple connection ports of the controller 102 to be connected to multiple drivers 1031 respectively, thereby reducing the number of data lines between the controller 102 and the driver 1031.

[0081] In some embodiments, since a driver 1031 needs to be connected to N red LEDs, N blue LEDs, and N green LEDs respectively, the driver 1031 needs to distinguish each color of LED when driving the N red LEDs, N blue LEDs, and N green LEDs, so as to drive the different colors of LEDs separately. That is, the driver 1031 is also used to: upon receiving a drive signal, drive the emitted light of at least two categories of LEDs according to at least two sub-drive signals, with different sub-drive signals driving different categories of LEDs.

[0082] When driver 1031 drives N red LEDs, N blue LEDs, and N green LEDs, driver 1031 needs to map each drive port to an LED. For example, if a single driver 1031 is connected to two light-emitting unit groups 1032, i.e., two groups of red LEDs, two groups of blue LEDs, and two groups of green LEDs, then six drive ports are required, as shown in Figure 10. The drive data received by the data transmission port includes drive data for all LEDs connected to driver 1031. After driver 1031 parses the drive data, it can obtain a parsing result including drive data for all LEDs. Thus, driver 1031 can generate sub-drive signals for each group of red LEDs, each group of blue LEDs, and each group of green LEDs based on the parsing result, thereby controlling the emitted light of the corresponding LEDs according to the sub-control signals.

[0083] It is understandable that the driver 1031 outputs driving signals to different types of LEDs through different driving terminals, which can realize the simultaneous driving of multiple types of LEDs and improve driving efficiency.

[0084] In some embodiments, the driver 1031 can drive the LED in the following manner:

[0085] 1. Current drive: The driver 1031 outputs current to drive the LED to emit light. However, when low grayscale display is required, the equivalent current needs to be reduced. Since the LED cannot emit light in a low current environment, this method will cause the problem of uneven brightness.

[0086] 2. PWM drive is used. A constant current is used, and a different PWM wave is output in each cycle to produce different equivalent currents. However, in low grayscale display, the minimum width of the PWM is limited, leading to flickering issues on the LED display screen.

[0087] 3. Employs a hybrid PWM and current drive. By combining the grayscale generated by PWM timing with the grayscale generated by controlling the current magnitude, a hybrid grayscale drive is achieved, resulting in the best display effect and eliminating flickering issues even at low grayscale levels.

[0088] In summary, those skilled in the art typically employ the third method to execute the drive. Accordingly, the driver 1031 may include a processor, a current modulation circuit, a pulse width modulation circuit, and a drive circuit. The processor's input is connected to the data transmission terminal; the current modulation circuit's input is connected to the processor's output; the current modulation circuit's output is connected to the drive circuit's input; the pulse width modulation circuit's input is connected to the processor's output; and the current modulation circuit's output is connected to the drive circuit's input. The current modulation circuit generates a current modulation signal based on the data parsing results and inputs the current modulation signal to the drive circuit. The pulse width modulation circuit generates a pulse width modulation signal based on the data parsing results and inputs the pulse width modulation signal to the drive circuit. The drive circuit drives the LED light.

[0089] In some embodiments, the pulse width modulation circuit described above may include a counter, a comparator, and a DFF chip (D-type flip-flop). The comparator compares the data parsing result with the counter data to obtain the accurate pulse width, and then the DFF chip generates and outputs the pulse width signal.

[0090] In some embodiments, the driving circuit may include multiple driving ports, a current modulation signal receiving circuit connected to the current modulation circuit, and a pulse width modulation signal receiving circuit connected to the pulse width modulation circuit, wherein the multiple driving ports are correspondingly connected to the red LED R, the green LED G, and the blue LED B.

[0091] In some embodiments, the driving circuit may include a first MOSFET M1, a second MOSFET M2, and a third MOSFET M3. The gate of the first MOSFET M1 is connected to the first output interface of the current modulation circuit, the gate of the second MOSFET M2 is connected to the output interface of the pulse width modulation circuit, and the third MOSFET M3 is connected to the second output interface of the current modulation circuit. The source of the first MOSFET M1 is connected to the drain of the second MOSFET M2, the drain of the first MOSFET M1 and the drain of the third MOSFET M3 are connected to form a first node, and the source of the second MOSFET M2 and the source of the third MOSFET M3 are connected to a second node.

[0092] In some embodiments, the connection relationship between the first MOSFET M1, the second MOSFET M2, and the third MOSFET M3, the current modulation circuit, and the pulse width modulation circuit can adopt a common cathode or common anode structure.

[0093] In the common anode structure, the first node is connected to the LED power supply, and the second node is connected to the anode of the red LED R, the anode of the green LED G, and the anode of the blue LED B. The first MOSFET M1, the second MOSFET M2, and the third MOSFET M3 are all N-channel MOSFETs.

[0094] Let the first current modulation signal be I1, the second current modulation signal be I2, and the pulse width modulation signal be PWM. Then, the driving current I of the RGB driving circuit provided in this application embodiment is expressed by the following formula:

[0095] The total pulse width can be 16 bits, or 65,536 clock cycles.

[0096] In the common cathode structure, the anodes of the red LED R, the green LED G, and the blue LED B are connected to the LED power supply. The first node is connected to the cathodes of the red LED R, the green LED G, and the blue LED B. The second node is grounded. The first MOSFET M1, the second MOSFET M2, and the third MOSFET M3 are all P-channel MOSFETs.

[0097] In some embodiments, the pulse width modulation signal receiving circuit described above may also employ a common cathode or common anode structure. For details, please refer to the technical description of the current modulation signal receiving circuit described above; further elaboration will not be repeated here.

[0098] In some embodiments, the driver 1031 may employ digital circuitry, meaning that the functions of the aforementioned current modulation circuit, pulse width modulation circuit, and drive circuit are all implemented through the processor's control logic. Compared to analog circuitry, this provides more accurate pulse width and current for each gray level and is not subject to noise interference from the driver 1031's internal or external environment.

[0099] As shown in Figure 11, the driver 1031 may include a control unit, a power supply unit, a connection port, and a drive unit. The connection port is connected to the controller 102 and is used to receive drive signals and output feedback signals. The power supply unit is connected to the power supply circuit 101 and is used to receive power supply signals. The control unit is connected to both the power supply unit and the connection port and is used to output drive control signals to the drive unit based on the power supply signals and drive signals. The drive unit is connected to at least two light-emitting unit groups and is used to drive the at least two light-emitting unit groups to emit light according to the drive control signals. The drive unit is also used to send the collected output electrical signals from the at least two light-emitting unit groups to the control unit. The control unit then obtains the corresponding feedback signals based on the output electrical signals and standard electrical parameters, and outputs the feedback signals through the connection port.

[0100] For ease of understanding, Figure 12 illustrates the feedback process as an example, which includes the following steps:

[0101] S1201, when the power supply circuit outputs a power supply signal to at least two light-emitting unit groups, the driver collects the output electrical signal of each light-emitting unit group.

[0102] S1202, the driver generates a feedback signal based on the output electrical signal and the drive signal;

[0103] S1203, the driver sends a feedback signal to the controller;

[0104] S1204, the controller adjusts the power supply signal output by the power supply circuit based on the feedback signal.

[0105] Specifically, when the power supply circuit 101 outputs a power supply signal to at least two light-emitting unit groups 1032, the driver 1031 collects the output electrical signal of each light-emitting unit group 1032, and generates and outputs a feedback signal based on the output electrical signal and the driving signal. After receiving the feedback signal, the controller 102 adjusts the power supply signal output by the power supply circuit 101 according to the feedback signal. The feedback signal is used to indicate whether the output electrical signal meets the emission conditions of at least two light-emitting unit groups 1032. The emission conditions are determined according to the driving signal.

[0106] In this embodiment, LEDs emitting light of different wavelengths are connected to the same driver 1031. Therefore, when generating feedback signals, the driver 1031 needs to generate different sub-feedback signals for different types of LEDs, such as red, blue, and green LEDs. The driver 1031 will acquire the output electrical signal of each LED. After obtaining the output electrical signals of different types of LEDs, the driver 1031 can obtain the standard electrical parameters corresponding to the sub-driving signals of each type of LED based on the preset correspondence between sub-driving signals and standard electrical parameters. Then, by comparing the electrical parameters of the output electrical signals with the standard electrical parameters, a feedback signal indicating the comparison result is obtained.

[0107] In this embodiment, the electrical parameters of the output electrical signal are the same as the standard electrical parameters. The electrical parameters can be voltage or current, and can be set according to actual conditions. This embodiment does not impose any restrictions. However, because the difference between the output current value of the power supply circuit 101 when the voltage is below the threshold and the output current value when the voltage is above the threshold is small, the controller 102 cannot accurately determine whether the power supply signal needs to be adjusted based on the current value. Therefore, the voltage of the output electrical signal can be compared with the standard voltage to determine whether the power supply signal needs to be adjusted, thereby improving the efficiency of power supply signal control.

[0108] In some embodiments, when the voltage of the acquired output electrical signal is less than the standard voltage, the sub-feedback signal can be a first level; when the voltage of the acquired output electrical signal is greater than or equal to the standard voltage, the sub-feedback signal can be a second level. The second level is different from the first level; for example, the first level is a low level and the second level is a high level.

[0109] In some embodiments, the power supply circuit includes at least two power supply modules, with different power supply modules corresponding to different categories of LEDs, to output power supply signals of different voltage magnitudes to different categories of LEDs. For example, the power supply circuit includes a first power supply module corresponding to red LEDs, a second power supply module corresponding to green LEDs, and a third power supply module corresponding to blue LEDs. When the power supply circuit is connected to at least two LEDs, the first power supply module is connected to all red LEDs, the second power supply module is connected to all green LEDs, and the third power supply module is connected to all blue LEDs. Thus, the power supply circuit can output a first power supply signal to all red LEDs through the first power supply module, output a second power supply signal to all green LEDs through the second power supply module, and output a third power supply signal to all blue LEDs through the third power supply module.

[0110] The controller in this application embodiment can adjust the power supply signal of the power supply circuit according to the feedback signal, and make separate adjustments for different types of LEDs. For example, when adjusting the first power supply signal, it is necessary to adjust it according to the feedback signal of the red LED; when adjusting the second power supply signal, it is necessary to adjust it according to the feedback signal of the green LED; and when adjusting the third power supply signal, it is necessary to adjust it according to the feedback signal of the blue LED.

[0111] It should be understood that since the power supply circuit 101 is connected in parallel with LEDs of the same type, when the controller 102 regulates the power supply signal, the output electrical signals of all LEDs of the same type will be adjusted. For example, when adjusting the power supply signal for a red LED in a certain light-emitting unit group 1032, the power supply signals of all red LEDs in the light-emitting unit groups 1032 corresponding to at least two drivers 1031 will be affected. Therefore, in this embodiment, the controller 102 can first integrate the feedback signals of all LEDs of the same type so that the controller 102 can adjust the power supply signal according to the integrated feedback signal.

[0112] However, since the driver 1031 is connected to at least two light-emitting unit groups 1032, and each light-emitting unit group 1032 includes at least two types of LEDs, and different types of LEDs in different light-emitting unit groups will generate different sub-feedback signals, a single driver 1031 connected to at least two light-emitting unit groups 1032 will obtain at least four sub-feedback signals. Among the at least four sub-feedback signals, there are sub-feedback signals of the same type of LEDs. These sub-feedback signals can be integrated. The execution subject for integrating the sub-feedback signals of the same type of LEDs among the at least four sub-feedback signals can be the controller 102 or the driver 1031.

[0113] In some embodiments, the emission conditions of at least two light-emitting unit groups are determined based on the driving signal. For example, when the driver uses current to drive the output driving signal, the driving signal is a driving current with a specific current value. Since the current value of the driving current affects the emission effect of the LED lamp, such as brightness, that is, the larger the current value of the driving current, the brighter the brightness, and the smaller the current value of the driving current, the dimmer the brightness, the emission condition is whether the actual brightness of the LED lamp matches the ideal brightness corresponding to the current value of the driving current.

[0114] When the driver uses PWM to output the drive signal, the drive signal is a PWM signal with a specific duty cycle. After receiving the drive signal, the driver will first obtain the corresponding drive current according to the PWM signal, and then drive the LED to emit light according to the drive current. Since the duty cycle of the PWM signal will affect the emission effect of the LED, such as brightness, the larger the duty cycle of the PWM signal, the brighter the light, and the smaller the duty cycle of the PWM signal, the dimmer the light, the emission condition is whether the actual brightness of the LED matches the ideal brightness corresponding to the duty cycle of the PWM signal.

[0115] When the driver uses a hybrid PWM and current drive to output the drive signal, the drive signal includes a drive current with a specific current value and a PWM signal with a specific duty cycle. After receiving the drive signal, the driver will synchronously drive the LED according to the PWM signal and the drive current. Then the output condition is whether the actual brightness of the LED matches the ideal brightness corresponding to the duty cycle of the PWM signal and the current value of the drive current.

[0116] In some embodiments, since the actual brightness of an LED is positively correlated with the electrical parameters of its output electrical signal, the driver can determine the actual brightness of the LED by obtaining the electrical parameters of the LED's output electrical signal, including voltage and / or current.

[0117] In some embodiments, when the controller 102 integrates the sub-feedback signals of LEDs of the same category from at least four sub-feedback signals, that is, the driver 1031 can collect the output electrical signals of all LEDs in each light-emitting unit group 1032 and output the feedback signal corresponding to each light-emitting unit group 1032, and then send the feedback signal corresponding to each light-emitting unit group 1032 to the controller 102. For example, the driver 1031 is connected to two light-emitting unit groups 1032, and each light-emitting unit group 1032 includes a set of red LEDs, a set of green LEDs and a set of blue LEDs. Then, when the driver generates the feedback signal, it will generate two feedback signals, and the two feedback signals correspond to different light-emitting unit groups 1032 respectively. That is, each feedback signal includes a sub-feedback signal corresponding to the red LED, a sub-feedback signal corresponding to the green LED and a sub-feedback signal corresponding to the blue LED, and then send both feedback signals to the controller 102, and the controller 102 performs the integration process of the two feedback signals.

[0118] In some embodiments, the integration process may include: the controller 102 performing an operation on the feedback signals of LEDs of the same category from at least two feedback signals of at least two drivers 1031 using an "OR" and / or "AND" operation relationship, so that the integrated feedback signal includes only the sub-feedback signals of LEDs of different categories, so that if the sub-feedback signal of one LED of the same category indicates that the output electrical signal does not meet the emission conditions, the controller 102 can adjust the power supply signal of the power supply circuit 101 for all LEDs of that category.

[0119] For example, when the voltage of the acquired output electrical signal is less than the standard voltage, the sub-feedback signal is at a low level, and when the voltage of the acquired output electrical signal is greater than or equal to the standard voltage, the feedback signal is at a high level. At this time, after receiving at least two feedback signals sent by at least two drivers 1031, the controller 102 performs an AND logic on the sub-feedback signals of the same type of LEDs in the at least two feedback signals. If the sub-feedback signal of the red LED corresponding to one of the light-emitting unit groups 1032 in the sub-feedback signals of the same type of LED is at a low level, then the sub-feedback signal of the red LED in the integrated feedback signal is at a low level.

[0120] Similarly, if the voltage of the acquired output electrical signal is less than the standard voltage, the sub-feedback signal is high; if the voltage of the acquired output electrical signal is greater than or equal to the standard voltage, the sub-feedback signal is low. At this time, the controller 102 will perform "OR" logic on the sub-feedback signals of the same category of LEDs in at least two feedback signals.

[0121] In some other embodiments, when the driver 1031 integrates the sub-feedback signals of the same category of LEDs from at least four sub-feedback signals, that is, after the driver 1031 receives the sub-feedback signals of all categories of LEDs from at least two light-emitting unit groups 1032, it can first integrate the sub-feedback signals of all LEDs of the same category to obtain a feedback signal that includes sub-feedback signals of different categories of LEDs, so that the controller 102 adjusts the power supply signal according to the feedback signals of different categories of LEDs.

[0122] In some embodiments, the process of integrating the sub-feedback signals of all LEDs of the same category may include: the driver 1031 performing an operation on the feedback signals of LEDs of the same category in at least two light-emitting unit groups 1032 using an "OR" and / or "AND" operation relationship, and the integrated feedback signal includes only the sub-feedback signals of LEDs of different categories, so that if the sub-feedback signal of one LED of the same category indicates that the output electrical signal does not meet the emission conditions, the controller 102 can adjust the power supply signal of the power supply circuit 101 for all LEDs of that category.

[0123] Taking the case where the voltage of the acquired output electrical signal is less than the standard voltage and the sub-feedback signal is low, or the voltage of the acquired output electrical signal is greater than or equal to the standard voltage and the feedback signal is high, as an example, the driver 1031 performs an AND logic on the sub-feedback signals of LEDs of the same type. If, among all the sub-feedback signals of red LEDs acquired by the driver 1031, the sub-feedback signal of the red LED corresponding to one light-emitting unit group 1032 is low, then the sub-feedback signal of the red LED in the integrated feedback signal is low.

[0124] Similarly, if the voltage of the acquired output electrical signal is less than the standard voltage, the sub-feedback signal is high; if the voltage of the acquired output electrical signal is greater than or equal to the standard voltage, the sub-feedback signal is low. At this time, the driver 1031 will perform "OR" logic on the sub-feedback signals of LEDs of the same type.

[0125] In some embodiments, when integrating all LEDs in at least two light-emitting unit groups 1032, the driver 1031 can integrate the sub-feedback signals of LEDs of the same category in at least two light-emitting unit groups 1032, obtain and output a feedback signal, that is, the feedback signal only includes the sub-feedback signals of LEDs of different categories.

[0126] At this time, the driver 1031 can generate a feedback signal in the following manner: acquiring the output electrical signal corresponding to the target category LED in the target light-emitting unit group 1032, wherein the target light-emitting unit group 1032 is at least one of at least two light-emitting unit groups 1032, and the target category LED is at least one of at least two categories of LEDs; obtaining a sub-feedback signal corresponding to the target category LED based on the output electrical signal and the target driving signal, wherein the target driving signal is the driving signal corresponding to the target category LED in the driving signals; and, in the case of obtaining at least two sub-feedback signals corresponding to at least two target category LEDs in at least two light-emitting unit groups 1032, integrating the at least two sub-feedback signals to generate a feedback signal, wherein the feedback signal includes the target sub-feedback signal, and the target sub-feedback signal is one of the at least two sub-feedback signals.

[0127] It should be understood that since LEDs of the same category in the target light-emitting unit group 1032 are connected in series, for a single category of LEDs in a single light-emitting unit group 1032, the driver 1031 will only receive one output electrical signal. Then, based on the output electrical signal and the driving signal corresponding to that category of LED, a sub-feedback signal corresponding to that category of LED is obtained. That is, for a single light-emitting unit group 1032, the driver 1031 will only receive output electrical signals for different categories of LEDs, and thus obtain sub-feedback signals for different categories of LEDs. When the driver 1031 is connected to at least two light-emitting unit groups 1032, the driver 1031 can receive multiple sets of output electrical signals. After obtaining multiple corresponding sub-feedback signals based on the multiple sets of output electrical signals, the driver 1031 can integrate the multiple sub-feedback signals so that the feedback signal output by a single driver 1031 represents only a single category through a single sub-feedback signal. That is, the feedback signal output by a single driver 1031 only includes sub-feedback signals for different categories of LEDs.

[0128] For example, based on the structure shown in Figure 10, after the driver 1031 acquires the output electrical signals of the two light-emitting unit groups 1032, the output electrical signals of each light-emitting unit group 1032 include the output electrical signals of the red LED, the green LED, and the blue LED. The driver 1031 obtains the corresponding standard voltage based on the two sub-driving signals corresponding to the two groups of red LEDs, and then compares the voltage of the output electrical signal of the red LED with the standard voltage to obtain two corresponding sub-feedback signals. Among them, if the voltage of the output electrical signal of one group of red LEDs is less than the standard voltage, the corresponding sub-feedback signal is high level. If the voltage of the output electrical signal of the other group of red LEDs is greater than or equal to the standard voltage, the corresponding sub-feedback signal is low level. The controller 102 performs an "OR" operation on the two sub-feedback signals, and the integrated level value is a high-level sub-feedback signal. After feeding the feedback signal back to the controller 102, the controller 102 adjusts the power supply signal of the power supply circuit 101 for the red LED based on the high-level sub-feedback signal. The same applies to the green LED and the blue LED.

[0129] In some embodiments, when generating a feedback signal, the driver 1031 can superimpose the feedback sub-signals of the red LED, the green LED, and the blue LED in a preset order. For example, as shown in FIG13, the driver 1031 first adds the feedback sub-signal of the red LED, then adds the feedback sub-signal of the green LED, and finally adds the feedback sub-signal of the blue LED in a frame of feedback signal, thereby completing the generation of a frame of feedback signal.

[0130] In some embodiments, when at least two sub-feedback signals exist indicating that the output electrical signal does not meet the emission conditions, the level value of the target sub-feedback signal is a first level.

[0131] If none of the at least two sub-feedback signals indicates that the output electrical signal does not meet the emission conditions, the level value corresponding to the target sub-feedback signal is the second level, and the first level and the second level are different.

[0132] It should be understood that the purpose of driver 1031 integrating at least two sub-feedback signals is so that when controller 102 adjusts the power supply signal according to the feedback signal, controller 102 only needs to know whether the adjustment result is performed, without needing to perform an additional integration judgment process, thus reducing the processing flow of controller 102. Therefore, when driver 1031 integrates, the integrated target sub-feedback signal needs to indicate whether controller 102 needs to perform the adjustment result for the target category. Thus, in this embodiment, as long as there is a sub-feedback signal among the at least two sub-feedback signals that the output electrical signal does not meet the emission condition, the sub-feedback signal of the target category LED integrated by driver 1031 indicates that the output electrical signal does not meet the emission condition. Conversely, when there is no sub-feedback signal among the at least two sub-feedback signals that the output electrical signal does not meet the emission condition, the sub-feedback signal of the target category LED integrated by driver 1031 indicates that the output electrical signal meets the emission condition.

[0133] It is understood that after obtaining at least two sub-feedback signals corresponding to at least two light-emitting unit groups 1032, the driver 1031 integrates the at least two sub-feedback signals, so that the feedback signal finally output by the driver 1031 to the controller 102 only includes the sub-feedback signals of different types of LEDs, so that the controller 102 can uniformly adjust the power supply signal of the power supply circuit 101 for at least one type of LED, thereby improving the adjustment efficiency of the power supply signal.

[0134] In some embodiments, when the controller is connected to at least two drivers 1031, the at least two drivers 1031 will correspond to at least two feedback signals. However, since all LEDs of the same category in the at least two drivers 1031 will be affected when the power supply signal is adjusted, the controller needs to integrate the at least two power supply signals before adjusting the power supply signal to obtain a feedback signal indicating whether to adjust the power supply signal corresponding to each category of LED.

[0135] The execution entity that integrates at least two power supply signals can be a controller 102 or a driver 1031, which can be set by those skilled in the art according to the actual situation. This application embodiment does not impose any restrictions.

[0136] In some embodiments, if the above integration process is performed by the controller 102, that is, at least two drivers send at least two feedback signals to the controller 102, and after receiving at least two feedback signals, the controller 102 integrates the at least two feedback signals to generate the final feedback signal.

[0137] That is, after receiving at least two feedback signals, the controller 102 integrates the at least two feedback signals to generate a final feedback signal. The final feedback signal is used to indicate whether the output electrical signal of the target category LED in the light-emitting unit group corresponding to at least two drivers meets the emission conditions. The target category LED is at least one of at least two categories of LEDs. Then, according to the final feedback signal, the power supply circuit is controlled to adjust the electrical parameters of the power supply signal corresponding to the target category LED.

[0138] For example, based on the structure shown in FIG7, the controller 102 is connected to the first driver, and the first driver is also connected to the second driver. During the feedback process, the first driver obtains a first feedback signal based on the driving signal and the output electrical signals of at least two light-emitting unit groups. The second driver obtains a second feedback signal based on the driving signal and the output electrical signals of at least two light-emitting unit groups. The second driver sends the second feedback signal to the first driver, and then the first driver sends the first feedback signal and the second feedback signal to the controller 102. After receiving the first feedback signal and the second feedback signal, the controller 102 first integrates the first feedback signal and the second feedback signal to obtain the integrated final feedback. For example, in the first feedback signal, the feedback signal of the red LED is high, the feedback signal of the green LED is low, and the feedback signal of the blue LED is high. In the second feedback signal, the feedback signal of the red LED is high, the feedback signal of the green LED is high, and the feedback signal of the blue LED is high. Thus, the final feedback signal can be obtained, wherein the final feedback signal indicates that the feedback signal of the red LED is high, the feedback signal of the green LED is low, and the feedback signal of the blue LED is high. Then, the controller 102 adjusts the power supply signal of the red LED, the power supply signal of the green LED, and the power supply signal of the blue LED according to the final feedback signal.

[0139] In some embodiments, the above integration process can be performed by driver 1031. That is, after one driver 1031 receives a feedback signal, it can output it to another driver 1031, and then the other driver 1031 integrates the two feedback signals and outputs the integrated feedback signal to controller 102. However, in this embodiment, at least two drivers need to be connected to each other, that is, at least two drivers 1031 are connected in series.

[0140] For a structure in which at least two drivers 1031 are connected in series and each driver 1031 is connected to at least two light-emitting unit groups 1032 that include LEDs of the same type, as shown in Figure 7, the first driver needs to send the first feedback signal it receives to the connected second driver first, and then send it to the controller 102 through the second driver. Therefore, the second driver can integrate the received first feedback signal with its own second feedback signal, so that the feedback signal received by the controller 102 only includes the sub-feedback signals of different types of LEDs, saving the computing resources of the controller 102 in integrating the first feedback signal and the second feedback signal.

[0141] Based on this, the target driver 1031 can obtain feedback information in the following manner: receiving a first feedback signal sent by an adjacent driver 1031, the first feedback signal including sub-feedback signals of different types of LEDs in at least two light-emitting unit groups 1032 connected to the adjacent driver 1031; obtaining a second feedback signal, the second feedback signal including sub-feedback signals of different types of LEDs in at least two light-emitting unit groups 1032 connected to the target driver 1031; and then integrating the first feedback signal and the second feedback signal to obtain a feedback signal, the feedback signal including sub-feedback signals of different types of LEDs in at least two light-emitting unit groups 1032 connected to the adjacent driver 1031 and at least two light-emitting unit groups 1032 connected to the target driver 1031.

[0142] The first feedback signal is generated by the adjacent driver 1031 based on the output electrical signals and drive signals of at least two light-emitting unit groups 1032 connected to the adjacent driver 1031. The first feedback signal includes sub-feedback signals of different types of LEDs from the at least two light-emitting unit groups 1032 connected to the adjacent driver 1031. The specific generation process of the first feedback signal can be referred to the process of the driver 1031 obtaining feedback signals, which will not be repeated here. The second feedback signal is generated similarly.

[0143] It should be noted that the integration process of the first feedback signal and the second feedback signal can refer to the integration process of the sub-feedback signals of at least two target category LEDs in at least two light-emitting unit groups 1032 in a single driver 1031.

[0144] For example, based on the structure shown in FIG. 7, the first feedback signal obtained by the first driver indicates that the sub-feedback signal of the red LED is low (the voltage of the output electrical signal is less than the standard voltage), the sub-feedback signal of the green LED is high (the voltage of the output electrical signal is greater than or equal to the standard voltage), and the sub-feedback signal of the blue LED is low (the voltage of the output electrical signal is less than the standard voltage). The first driver outputs the first feedback signal to the second driver. At the same time, the second driver obtains a second feedback signal based on the output electrical signals of the red LED, green LED, and blue LED in the light-emitting unit group 1032 connected to itself, as well as their respective driving signals. The second feedback signal indicates that the sub-feedback signal of the red LED is low (the voltage of the output electrical signal is less than the standard voltage), the sub-feedback signal of the green LED is high (the voltage of the output electrical signal is greater than or equal to the standard voltage), and the sub-feedback signal of the blue LED is low (the voltage of the output electrical signal is less than the standard voltage). The sub-feedback signal of the LED is low (the voltage of the output electrical signal is less than the standard voltage), and the sub-feedback signal of the blue LED is high (the voltage of the output electrical signal is greater than or equal to the standard voltage). Therefore, after the second driver integrates the first feedback signal and the second feedback signal, the resulting feedback signal indicates that the sub-feedback signal of the red LED is low (the voltage of the output electrical signal is less than the standard voltage), the sub-feedback signal of the green LED is low (the voltage of the output electrical signal is less than the standard voltage), and the sub-feedback signal of the blue LED is low (the voltage of the output electrical signal is less than the standard voltage). The feedback signal is then output to the controller 102. After receiving the feedback signal, the controller 102 controls the power supply circuit 101 to adjust the power supply signals of the red LED, the green LED, and the blue LED.

[0145] It is understandable that in at least two drivers 1031 connected in series, by integrating its own second feedback signal with the first feedback signal after receiving the first feedback signal sent by the previous driver 1031, thereby generating a feedback signal, the integration process of the first and second feedback signals by the controller 102 can be reduced, and the adjustment efficiency of the power supply signal can be improved.

[0146] In some embodiments, based on the structure shown in FIG9, at least two drivers 1031 are divided into multiple groups, and each group of drivers 1031 includes at least one driver 1031 connected in series. The controller 102 is connected to each group of drivers 1031 respectively. Therefore, when each group of drivers 1031 sends a feedback signal to the controller 102, it needs to send the feedback signal through different transmission channels. For example, the first group of drivers (driver 1-1, driver 1-2, ..., driver 1-m) sends the feedback signal to the controller 102 through the first channel, and the second group of drivers (driver N-1, driver N-2, ..., driver Nm) sends the feedback signal to the controller 102 through the second channel. So at this time, the controller 102 receives the feedback signal through two ports.

[0147] For example, as shown in FIG14, the feedback signal received by the controller 102 through the first channel is a high level indicated by the red LED (the voltage of the output electrical signal is greater than or equal to the standard voltage), a high level indicated by the sub-feedback signal of the green LED (the voltage of the output electrical signal is greater than or equal to the standard voltage), and a high level indicated by the sub-feedback signal of the blue LED (the voltage of the output electrical signal is greater than or equal to the standard voltage). The feedback signal received through the second channel is a high level indicated by the red LED (the voltage of the output electrical signal is greater than or equal to the standard voltage), a low level indicated by the sub-feedback signal of the green LED (the voltage of the output electrical signal is less than the standard voltage), and a high level indicated by the sub-feedback signal of the blue LED (the voltage of the output electrical signal is greater than or equal to the standard voltage). Therefore, when the controller 102 controls the power supply circuit 101 to adjust the power supply signal, it only needs to adjust the power supply signal of the green LED.

[0148] In some embodiments, the driver 1031 sends the sub-feedback signals of different types of LEDs to the controller 102 in a time-division manner according to a preset sending order, thereby completing the sending of the feedback signals.

[0149] It should be understood that, since the light-emitting unit group 1032 connected to the driver 1031 includes multiple types of LEDs, the driver 1031 needs to send the sub-feedback signals for different types of LEDs in a time-division manner when sending feedback signals, so as to ensure the integrity of the transmission and reception of sub-feedback signals between the driver 1031 and the controller 102.

[0150] For example, as shown in Figure 13, when the driver 1031 sends a frame of feedback signal, it first sends the feedback sub-signal of the red LED in the frame of feedback signal in the first time period, then sends the feedback sub-signal of the green LED in the second time period, and finally sends the feedback sub-signal of the blue LED in the third time period, thereby completing the transmission of a frame of feedback signal.

[0151] It is understandable that by sending the sub-feedback signals of different types of LEDs in the feedback signal in a time-division manner, the incomplete transmission of the feedback signal due to signal instability can be avoided, thereby improving the transmission efficiency of the feedback signal.

[0152] In the process of the driver 1031 transmitting feedback signals, the feedback signals for all types of LEDs can be transmitted through the same port, or the feedback signals for different types of LEDs can be transmitted through different ports. The specific settings can be made by those skilled in the art according to the actual situation, and the embodiments of this application do not impose any restrictions.

[0153] For example, when the driver 1031 transmits feedback signals of different types of LEDs through different ports, there are at least two first ports and at least two data transmission terminals. Different first ports are connected to different data transmission terminals. The driver 1031 can output sub-feedback signals of different types of LEDs in a time-division manner through different data transmission terminals according to a preset transmission order. The controller 102 can receive sub-feedback signals of different types of LEDs through different first ports.

[0154] During the process of the controller 102 receiving feedback signals, the controller 102 can receive a sub-feedback signal of the red LED from the first target port, a sub-feedback signal of the green LED from another second target port, and a sub-feedback signal of the blue LED from the third target port. The first target port is one of at least two first ports, the second target port is the other of at least two first ports, and the third target port is the other port among at least two first ports besides the first target port and the second target port.

[0155] It should be understood that although the steps in the flowchart of Figure 12 are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in Figure 12 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0156] It should be understood that in the various embodiments of this application, the sequence numbers of the above processes do not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above embodiments of this application are merely for description and do not represent the superiority or inferiority of the embodiments. The descriptions of the various embodiments above tend to emphasize the differences between the various embodiments. The similarities or similarities can be referred to each other, and for the sake of brevity, they will not be repeated here.

[0157] This application embodiment also provides a display method, which is applied to the display device in any of the above embodiments, and the display method may include:

[0158] The driver 1031 receives the drive signal output by the controller 102;

[0159] When the power supply circuit 101 outputs a power supply signal to at least two light-emitting unit groups 1032, the driver 1031 collects the output electrical signals output by at least two light-emitting unit groups 1032, obtains the feedback signals corresponding to at least two light-emitting unit groups 1032 based on the output electrical signals and the driving signal, and outputs the feedback signals to the controller 102. The feedback signals are used to indicate whether the output electrical signals meet the emission conditions of at least two light-emitting unit groups 1032. The emission conditions are determined according to the driving signal.

[0160] The controller 102 receives and controls the power supply circuit 101 to adjust the electrical parameters of the power supply signal according to the feedback signal, so that the output electrical signal meets the emission conditions of at least two light-emitting unit groups 1032.

[0161] In some embodiments, the LEDs in each light-emitting unit group 1032 are divided into at least two categories according to the wavelength of the emitted light. LEDs of the same category are connected in series, and different driving terminals are connected to LEDs of different categories. The driving signal includes at least two sub-driving signals. The driver 1031 is also used for:

[0162] Upon receiving a driving signal, at least two types of LEDs are driven to emit light according to at least two sub-driving signals, with different sub-driving signals driving different types of LEDs.

[0163] In some embodiments, the feedback signal includes at least two sub-feedback signals, with different sub-feedback signals corresponding to different categories of LEDs. The driver 1031 can also obtain the feedback signal in the following manner: acquiring the output electrical signal corresponding to the target category LED in the target light-emitting unit group 1032, where the target light-emitting unit group 1032 is at least one of at least two light-emitting unit groups 1032, and the target category LED is at least one of at least two categories of LEDs; obtaining the target sub-feedback signal corresponding to the target category LED based on the output electrical signal and the target driving signal, where the target driving signal is the driving signal corresponding to the target category LED among the driving signals; and integrating the at least two sub-feedback signals corresponding to at least two light-emitting unit groups 1032 to generate a feedback signal, which includes the sub-feedback signals of different categories of LEDs in the at least two light-emitting unit groups 1032.

[0164] In some embodiments, when there is a sub-feedback signal indicating that the output electrical signal does not meet the emission conditions in at least two light-emitting unit groups 1032 corresponding to LEDs of the target category, the level value of the feedback signal corresponding to the target category is a first level.

[0165] If there is no sub-feedback signal indicating that the output electrical signal does not meet the emission conditions in at least two groups of light-emitting units 1032 corresponding to the LED of the target category, the level value corresponding to the target category is the second level, and the first level and the second level are different.

[0166] In some embodiments, the drive signal includes at least two sub-drive signals, the number of drivers 1031 is at least two, the at least two drivers 1031 are connected in series, the at least two sub-drive signals correspond one-to-one with the at least two drivers 1031, and the controller 102 is connected to the at least two drivers 1031 connected in series, wherein:

[0167] Controller 102 is used to output drive signals, the drive signals including sub-drive signals corresponding to each of at least two drivers 1031;

[0168] The target driver 1031 is used to drive at least two light-emitting unit groups 1032 connected to the target driver 1031 to emit light according to the target sub-driving signal when a corresponding target sub-driving signal is received. The target driver 1031 is at least one of the at least two drivers 1031.

[0169] In some embodiments, the target driver 1031 is:

[0170] Receive a first feedback signal sent by an adjacent driver 1031, the first feedback signal including sub-feedback signals of different types of LEDs from at least two light-emitting unit groups 1032 connected to the adjacent driver 1031;

[0171] A second feedback signal is obtained, which includes sub-feedback signals of different types of LEDs in at least two light-emitting unit groups 1032 connected to the target driver 1031;

[0172] By integrating the first feedback signal and the second feedback signal, a feedback signal is obtained. The feedback signal includes sub-feedback signals of LEDs of different categories in at least two light-emitting unit groups 1032 connected to the adjacent driver 1031 and at least two light-emitting unit groups 1032 connected to the target driver 1031.

[0173] In some embodiments, the driver 1031 outputs a feedback signal to the controller 102, including:

[0174] The driver 1031 outputs sub-feedback signals of different types of LEDs in a time-division manner according to a preset transmission sequence.

[0175] In some embodiments, the controller 102 includes a first port, and the controller 102 is connected to a data transmission terminal through the first port, wherein:

[0176] The controller 102 is used to send drive signals through the first port and to receive sub-feedback signals of different types of LEDs through the first port.

[0177] In some embodiments, the number of first ports is at least two, the number of data transmission ends is at least two, and different first ports are connected to different data transmission ends, wherein:

[0178] The driver 1031 is used to output sub-feedback signals of different types of LEDs in a time-division manner through different data transmission terminals according to a preset transmission order.

[0179] In some embodiments, the driver 1031 further includes a signal feedback terminal, and the controller 102 includes a second port and a third port. The controller 102 is connected to the data transmission terminal through the second port, and the controller 102 is connected to the signal feedback terminal through the third port, wherein:

[0180] The controller 102 is used to send drive signals through the second port and receive sub-feedback signals from different types of LEDs through the third port.

[0181] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three kinds of relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0182] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0183] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method or device embodiments.

Claims

1. A display device, the display device comprising: Display panel; The power supply circuit is electrically connected to the display panel and is used to output power supply signals; A backlight assembly, connected to the power supply circuit, is used to emit light of at least two wavelengths based on the power supply signal; The controller is connected to the power supply circuit and the backlight assembly respectively, and is used to obtain and output driving signals to the backlight assembly to drive the backlight assembly to emit at least two fields of light based on a frame of image data; The backlight assembly includes: At least two light-emitting unit groups are connected to the power supply circuit. Each light-emitting unit group includes a plurality of light-emitting diodes (LEDs) that are electrically connected to each other. Each light-emitting unit group is used to emit light of at least two wavelengths based on the power supply signal. The driver includes a power supply terminal, a data transmission terminal, and at least two driving terminals, and is configured to: receive the driving signal through the data transmission terminal, and drive the at least two light-emitting unit groups to emit the at least two fields of light through the at least two driving terminals according to the driving signal; And, when the power supply circuit outputs the power supply signal to the at least two light-emitting unit groups, the output electrical signal output by the at least two light-emitting unit groups is acquired, and a feedback signal corresponding to the at least two light-emitting unit groups is obtained based on the output electrical signal and the driving signal, and the feedback signal is output to the controller; wherein, the power supply terminal is connected to the power supply circuit, different driving terminals are connected to different light-emitting unit groups, and the data transmission terminal is connected to the controller; the driver; the feedback signal is used to indicate whether the output electrical signal meets the emission conditions of the at least two light-emitting unit groups, and the emission conditions are determined based on the driving signal; The controller is configured to: control the power supply circuit to adjust the electrical parameters of the power supply signal according to the feedback signal, so that the output electrical signal meets the emission conditions of the at least two light-emitting unit groups.

2. The display device as claimed in claim 1, wherein the plurality of LEDs in each light-emitting unit group are divided into at least two categories; the at least two categories are determined according to the wavelength of the light emitted by each of the plurality of LEDs, LEDs of the same category are connected in series, different driving terminals are connected to LEDs of different categories, and the driving signal includes at least two sub-driving signals; The driver is further configured to: upon receiving the driving signal, drive the at least two categories of LEDs according to the at least two sub-driving signals, with different sub-driving signals driving different categories of LEDs.

3. The display device as claimed in claim 2, wherein the feedback signal includes at least two sub-feedback signals, and different types of LEDs correspond to different sub-feedback signals; The driver is specifically configured to obtain feedback signals corresponding to the at least two light-emitting unit groups based on the output electrical signal and the driving signal. The output electrical signal corresponding to the target category LED in the target light-emitting unit group is collected, wherein the target light-emitting unit group is at least one of the at least two light-emitting unit groups, and the target category LED is at least one of the at least two categories of LEDs; Based on the output electrical signal and the target driving signal, a sub-feedback signal corresponding to the target category LED is obtained, wherein the target driving signal is the driving signal corresponding to the target category LED among the driving signals; In the case of obtaining at least two sub-feedback signals corresponding to at least two target category LEDs in the at least two light-emitting unit groups, the at least two sub-feedback signals are integrated to generate the feedback signal, the feedback signal including the target sub-feedback signal, the target sub-feedback signal being one of the at least two sub-feedback signals.

4. The display device as claimed in claim 3, wherein if one of the at least two sub-feedback signals indicates that the output electrical signal does not meet the emission condition, the level value of the target sub-feedback signal is a first level; If none of the at least two sub-feedback signals indicates that the output electrical signal does not meet the emission conditions, the level value corresponding to the target sub-feedback signal is a second level, and the first level and the second level are different.

5. The display device as claimed in claim 4, wherein the driving signal includes at least two sub-driving signals, the number of drivers is at least two, the at least two drivers are connected in series, and the at least two sub-driving signals correspond one-to-one with the at least two drivers; the controller is connected to the at least two drivers, and the driving signal output by the controller includes the sub-driving signals corresponding to each of the at least two drivers; The at least two drivers include at least one target driver, wherein the target driver, upon receiving a corresponding target sub-drive signal, drives at least two light-emitting unit groups connected to the target driver according to the target sub-drive signal.

6. The display device of claim 5, wherein the target driver is further configured to: Receive a first feedback signal sent by an adjacent driver, the first feedback signal including sub-feedback signals of different categories of LEDs from at least two light-emitting unit groups connected to the adjacent driver; A second feedback signal is obtained, the second feedback signal including sub-feedback signals of LEDs of different categories from at least two light-emitting unit groups connected to the target driver; The first feedback signal and the second feedback signal are integrated to obtain the feedback signal, which includes sub-feedback signals of LEDs of different categories in at least two light-emitting unit groups connected to the adjacent driver and at least two light-emitting unit groups connected to the target driver.

7. The display device of claim 6, wherein the driver is further configured to: According to a preset transmission sequence, within a transmission cycle, the sub-feedback signals of the different types of LEDs are output to the controller in a time-division manner.

8. The display device of claim 7, wherein the controller is further configured to: The drive signal is sent through a first port connected to the data transmission terminal, and the sub-feedback signals of the different types of LEDs are received through the first port.

9. The display device of claim 8, wherein the number of the first ports is at least two, the number of the data transmission ends is at least two, and different first ports are connected to different data transmission ends, wherein: The driver is further configured to output sub-feedback signals of different types of LEDs in a time-division manner through different data transmission terminals within a transmission cycle, according to a preset transmission order.

10. The display device according to any one of claims 3-9, wherein the power supply circuit comprises a plurality of power supply modules, the plurality of power supply modules being electrically connected to different types of LEDs respectively; The controller is further configured to: for each type of LED, adjust the output voltage of the power supply module electrically connected to the LED of that type according to the sub-feedback signal corresponding to the LED of that type.

11. The display device as claimed in claim 2, wherein the feedback signal includes at least four sub-feedback signals, and different types of LEDs in different light-emitting unit groups correspond to different sub-feedback signals; The driver is further configured to: upon receiving at least four sub-feedback signals corresponding to at least two categories of LEDs in the at least two light-emitting unit groups, output the at least four sub-feedback signals to the controller; The controller is further configured to: receive the at least four sub-feedback signals, integrate the at least four sub-feedback signals to obtain a final feedback signal; and, based on the final feedback signal, control the power supply circuit to adjust the electrical parameters of the power supply signal corresponding to the target category LED; wherein... The final feedback signal is used to indicate whether the output electrical signal of the target category LED meets the emission condition, wherein the target category LED is at least one of the at least two categories of LEDs.

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