Backlight control system, data transmission method and display equipment

Abstract

The invention discloses a backlight control system, a data transmission method and a display device, the backlight control system comprises a backlight controller and a backlight driver, and the backlight driver is connected with a light emitting unit; the backlight controller is configured to: output a data signal to the backlight driver according to a transmission rate that varies within a first range; the first range is determined according to the reference transmission rate, and the transmission rate of the data signal fluctuates in the first range based on the reference transmission rate; and the backlight driver is used for extracting backlight data from the data signal and driving the light emitting unit to emit light according to the backlight data. As the transmission rate changes in the first range, the transmission rate during data signal transmission is not fixed, the problem of energy concentration of EMI radiation caused by the fixed transmission rate is solved, and the performance of the display device is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a backlight control system, a data transmission method, and a display device. Background Technology

[0002] A liquid crystal display device includes a display screen, light-emitting units for emitting backlight, and a backlight control system. The backlight control system includes a backlight controller and a backlight driver. Each backlight driver is connected to multiple light-emitting units, and the light-emitting units connected to each backlight driver constitute a dimming zone. When multiple dimming zones are formed, local dimming can be achieved, thereby improving the display effect of the display device.

[0003] The backlight controller is connected in series with multiple backlight drivers. The data signal output by the backlight controller can be transmitted sequentially to each connected backlight driver. The data signal includes dimming data for each backlight driver. When the backlight driver receives the data signal, it can extract the required dimming data to drive the corresponding light-emitting unit to emit light.

[0004] The data signal transmission format is as follows: Figure 1 As shown, the data signal consists of multiple bits of data. One bit of data includes pre-data, backlight data, and post-data. The duration of pre-data, data, and post-data determines the duration of one bit, and the duration of one bit determines the data signal transmission rate. Figure 1 The "1" and "0" in the code represent the data within each bit. However, since the transmission rate is usually kept constant during the transmission of data signals, this can cause the energy of electromagnetic interference (EMI) radiation to concentrate, resulting in EMI problems, such as, but not limited to, causing abnormal operation of sensitive circuits, leading to a decrease in the performance of display devices. Summary of the Invention

[0005] This invention provides a backlight control system, a data transmission method, and a display device, thereby improving the performance of the display device.

[0006] In a first aspect, embodiments of the present invention provide a backlight control system, including a backlight controller and a backlight driver, wherein the backlight driver is connected to a light-emitting unit; the backlight controller is configured to: output a data signal to the backlight driver according to a transmission rate varying within a first range; the first range is determined based on a reference transmission rate, and the transmission rate of the data signal fluctuates within the first range based on the reference transmission rate; the backlight driver is configured to: extract backlight data from the data signal and drive the light-emitting unit to emit light according to the backlight data.

[0007] Optionally, the first range is: from the reference transmission rate to the first transmission rate, or from the reference transmission rate to the second transmission rate, or from the first transmission rate to the second transmission rate; the first transmission rate is the difference between the product of the reference transmission rate and the first coefficient and the reference transmission rate; the second transmission rate is the sum of the product of the reference transmission rate and the second coefficient and the reference transmission rate.

[0008] Optionally, the time it takes for the data signal transmission rate to change from the reference transmission rate to the target transmission rate and back to the reference transmission rate is a change cycle. The data signal transmission rate changes periodically based on the change cycle, and the target transmission rate is either the first transmission rate or the second transmission rate.

[0009] Optionally, the backlight driver is specifically used to: determine the sampling time; and extract backlight data from the data signal when the sampling time is reached.

[0010] Optionally, the backlight driver is specifically used to determine the sampling time according to the following formula: SP=[(A1+A2) / 2]×(Tp+Td / 2) / (1 / f); A1 = 1 - B1; A2 = 1 + B2; Where SP represents the sampling time, f represents the crystal oscillator frequency in the backlight driver, each bit in the data signal includes pre-amplifier data, backlight data and post-amplifier data, Tp represents the duration of the pre-amplifier data, Td represents the duration of the backlight data, B1 represents the first coefficient, and B2 represents the second coefficient.

[0011] Optionally, the backlight controller includes an adjustment module and a data module, with the data module connected between the adjustment module and the backlight driver; the adjustment module is used to: output a first coefficient or a second coefficient to the data module; the data module is used to: determine the duration of each bit in the data signal according to the first coefficient or the second coefficient; and determine the transmission rate of the data signal according to the determined duration of each bit.

[0012] Optionally, the data module is specifically used to: when each bit includes pre-processed data, backlight data, and post-processed data, correct the duration of at least one of the pre-processed data, backlight data, and post-processed data according to a first coefficient or a second coefficient, and calculate the sum of the duration of the corrected data and the duration of the uncorrected data in the pre-processed data, backlight data, and post-processed data.

[0013] Optionally, the data module is specifically used to: when correcting the duration of at least two of the front-end data, backlight data, and rear-end data, use either the first coefficient or the second coefficient.

[0014] In a second aspect, embodiments of the present invention provide a data transmission method, which is applied to a backlight control system as described in the first aspect above. The data transmission method includes: a backlight controller outputting a data signal to a backlight driver according to a transmission rate that varies within a first range; the first range being determined based on a reference transmission rate, and the transmission rate of the data signal fluctuating within the first range based on the reference transmission rate; the backlight driver extracting backlight data from the data signal and driving the light-emitting unit to emit light according to the backlight data.

[0015] Thirdly, embodiments of the present invention provide a display device, including: a plurality of light-emitting units and a backlight control system as described in the first aspect above, wherein a backlight driver is connected to the backlight controller and the light-emitting units respectively.

[0016] The beneficial effects of this invention are as follows: The backlight control system, data transmission method, and display device provided in this invention allow the transmission rate to vary within a first range when transmitting data signals. This indicates that the transmission rate is not fixed but dynamically changes within the first range. This solves the problem of energy concentration in EMI radiation caused by a fixed transmission rate, avoids EMI problems, and improves the performance of the display device. Attached Figure Description

[0017] Figure 1 A schematic diagram of a data transmission format provided in the prior art; Figure 2 This is a schematic diagram of the backlight control system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the change cycle provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the backlight controller provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the sampling time provided in an embodiment of the present invention; Figure 6 This is a flowchart of the data transmission method provided in the embodiments of the present invention; Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0018] The specific embodiments of a backlight control system, data transmission method, and display device provided by the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a backlight control system, such as... Figure 2 As shown, the backlight control system includes a backlight controller and a backlight driver, with the backlight driver connected to the light-emitting unit. The backlight controller is used to: output a data signal to the backlight driver according to a transmission rate varying within a first range; the first range is determined based on a reference transmission rate, and the transmission rate of the data signal fluctuates within the first range based on the reference transmission rate; the backlight driver is used to: extract backlight data from the data signal and drive the light-emitting unit to emit light according to the backlight data. For example, in Figure 2 In this context, S0 represents the data signal, v, v1, and v2 represent the transmission rate, and the first range is represented by [v1, v2].

[0020] Thus, when transmitting data signals, the transmission rate will vary within the first range, indicating that the transmission rate is not fixed but dynamically changes within the first range, thus dispersing the radiated energy of EMI. This solves the problem of concentrated EMI radiation caused by a fixed transmission rate, avoids EMI problems, and improves the performance of the display device.

[0021] Furthermore, since the data signal transmission rate fluctuates based on the reference transmission rate within the first range, it indicates that the change in the data signal transmission rate is not significant, thereby reducing the impact on the data signal transmission.

[0022] It should be understood that transmission rate usually refers to the amount of data transmitted per unit of time, commonly measured in bits per second (bps) or megabits per second (Mbps). Transmission rate is used to measure the efficiency of data signal transmission. When a data signal contains multiple bits, the reciprocal of the duration of each bit is the transmission rate.

[0023] exist Figure 2 The example shown uses three backlight drivers, each connected to one light-emitting unit. In practice, the number of backlight drivers is not limited to three, and the number of light-emitting units connected to each backlight driver is not limited to one.

[0024] In this invention, when the backlight controller is connected to multiple backlight drivers, the backlight controller and each backlight driver are connected in series. This connection method can also be called a single-wire connection. Therefore, when the data signal is output from the backlight controller and transmitted through each backlight driver to the last backlight driver, it can be regarded as a single-wire transmission of the data signal. To improve the display effect and ensure the integrity of data transmission, it is necessary to increase the transmission rate of the single-wire transmission, which makes the EMI problem more serious. In this invention, based on the single-wire transmission, the dynamic change of the transmission rate can be combined to alleviate the EMI problem caused by the increase in transmission rate, and also improve the display effect and ensure the integrity of data transmission.

[0025] Optionally, the first range is: from the reference transmission rate to a first transmission rate, or from the reference transmission rate to a second transmission rate, or from the first transmission rate to a second transmission rate; the first transmission rate is the difference between the product of the reference transmission rate and a first coefficient and the reference transmission rate; the second transmission rate is the sum of the product of the reference transmission rate and a second coefficient and the reference transmission rate. This allows the data signal transmission rate to fluctuate around the reference transmission rate, reducing the impact on data signal transmission.

[0026] The first coefficient can be set to less than or equal to 20%, such as, but not limited to, 20%, 15%, 10%, 5%, 2%, 1%, etc. The first coefficient can also be abbreviated as gain min; the second coefficient can be set to less than or equal to 20%, such as, but not limited to, 20%, 15%, 10%, 5%, 2%, 1%, etc. The second coefficient can also be abbreviated as gain max; the first coefficient and the second coefficient can be the same or different, depending on the actual situation, and are not restricted here.

[0027] In this way, both the first and second transmission rates are relatively close to the reference transmission rate. When the transmission rate changes within the first range, it can be regarded as the transmission rate fluctuating around the reference transmission rate. Even if the fluctuation is significant, it will not deviate too far from the reference transmission rate. This can effectively reduce the impact on the transmission of data signals and reduce the energy concentration of EMI radiation.

[0028] For example, taking a base transmission rate of 1Mbps and a first transmission rate of 0.9Mbps as an example, the first coefficient is 10%, the lower limit of the first range can be 0.9Mbps, and the upper limit can be 1Mbps. When the backlight controller transmits data signals to the backlight driver, the data signal transmission rate dynamically changes between 0.9Mbps and 1Mbps. If the initial transmission time of the data signal is 1Mbps, then the transmission rate will decrease towards 0.9Mbps. Therefore, this change mode can be called the downward dynamic change mode.

[0029] For example, taking a base transmission rate of 1Mbps and a second transmission rate of 1.1Mbps as an example, the second coefficient is 10%, the lower limit of the first range can be 1Mbps, and the upper limit can be 1.1Mbps. When the backlight controller transmits data signals to the backlight driver, the data signal transmission rate dynamically changes between 1Mbps and 1.1Mbps. If the initial transmission time of the data signal is 1Mbps, then the transmission rate will increase towards 1.1Mbps. Therefore, this change mode can be called the upward dynamic change mode.

[0030] For example, taking a base transmission rate of 1Mbps, a first transmission rate of 0.9Mbps, and a second transmission rate of 1.1Mbps as an example, the lower limit of the first range can be 0.9Mbps and the upper limit can be 1.1Mbps. When the backlight controller transmits data signals to the backlight driver, the data signal transmission rate dynamically changes between 0.9Mbps and 1.1Mbps. If the initial transmission time of the data signal is 1Mbps, then the transmission rate will first increase towards 1.1Mbps and then decrease towards 0.9Mbps, or first decrease towards 0.9Mbps and then increase towards 1.1Mbps. Therefore, this change mode can be called the center dynamic change mode.

[0031] Of course, the three examples above are just examples based on specific data. In reality, the first and second coefficients are not limited to 10%, the first transmission rate is not limited to 0.9Mbps, and the second transmission rate is not limited to 1.1Mbps.

[0032] Furthermore, the first coefficient can be different for different reference transmission rates, and the second coefficient can be different for different reference transmission rates. This allows for setting appropriate first and second coefficients based on the reference transmission rate, reducing the fluctuation range of the transmission rate, while also ensuring dynamic changes in the transmission rate. This reduces the concentration of EMI radiation energy while maintaining normal display functionality.

[0033] Optionally, the time it takes for the data signal transmission rate to change from a reference transmission rate to a target transmission rate and back to the reference transmission rate is defined as a variation cycle. The data signal transmission rate changes periodically based on this variation cycle, and the target transmission rate is either a first transmission rate or a second transmission rate. This allows the transmission rate to change regularly within a first range, rather than randomly or chaotically, thus reducing differences between adjacent transmission rates and avoiding additional impacts.

[0034] Within a single change cycle, if the transmission rate changes from one rate to another, the difference between these two rates can be considered the fineness of the change. A smaller difference indicates higher fineness, resulting in a longer time to transition from the reference transmission rate to the target rate and a longer change cycle. This reduces the concentration of EMI radiation energy but places higher demands on the backlight controller's performance, and vice versa. Therefore, the fineness of the change can be set based on EMI requirements and the backlight controller's performance, and is not limited here.

[0035] For example, taking a base transmission rate of 1Mbps and a target transmission rate of 0.9Mbps as an example, combined with Figure 3 As shown, the transmission rate of the output signal can be 1Mbps, 0.999Mbps, 0.998Mbps, 0.997Mbps, ..., 0.902Mbps, 0.901Mbps, 0.9Mbps, 0.901Mbps, 0.902Mbps, ..., 0.998Mbps, 0.999Mbps, 1Mbps, and then the transmission rate continues to repeat. Therefore, the change from 1Mbps to 0.9Mbps and back to 1Mbps can be regarded as a change cycle. Based on this change cycle, the transmission rate changes periodically, and the change precision is 0.001Mbps.

[0036] Optionally, such as Figure 4 As shown, the backlight controller includes an adjustment module and a data module, with the data module connected between the adjustment module and the backlight driver. The adjustment module is used to: output a first coefficient or a second coefficient to the data module; the data module is used to: determine the duration of each bit in the data signal based on the first coefficient or the second coefficient; and determine the transmission rate of the data signal based on the determined duration of each bit.

[0037] The adjustment module can be a newly added module to the backlight controller, while the data module can be a module that already exists in the backlight controller. In this way, the newly added adjustment module enables the backlight controller to adjust the transmission rate, fulfilling the purpose of dynamically changing the transmission rate during data signal transmission. Alternatively, both the adjustment module and the data module can be modules that already exist in the backlight controller. This eliminates the need for additional structures in the backlight controller; the existing structure can be used to achieve the function of adjusting the transmission rate.

[0038] Furthermore, since the transmission rate and the duration of each bit are inversely related, the transmission rate can be adjusted by changing the duration of each bit, thus achieving dynamic changes in the transmission rate.

[0039] Furthermore, the data module is specifically used to: when each bit includes pre-processing data, backlight data, and post-processing data, correct the duration of at least one of the pre-processing data, backlight data, and post-processing data according to a first coefficient or a second coefficient, and calculate the sum of the corrected duration of the pre-processing data, backlight data, and post-processing data, and the duration of the uncorrected data. Since each bit includes pre-processing data, backlight data, and post-processing data, adjusting the duration of at least one of the pre-processing data, backlight data, and post-processing data can adjust the duration of each bit, thereby achieving dynamic changes in the transmission rate.

[0040] Furthermore, the data module is specifically used to: when correcting the duration of at least two of the pre-amplifier data, backlight data, and post-amplifier data, use either a first coefficient or a second coefficient for both. In other words, taking the correction of both pre-amplifier and backlight data durations as an example, the same first coefficient can be used to correct the durations of both data separately, or the same second coefficient can be used to correct the durations of both data separately. This reduces the complexity of the correction and improves its efficiency.

[0041] It should be understood that when the data module includes a first unit, a second unit, a third unit, and an accumulation unit, the first unit is used to generate the duration of the preceding data and correct the duration of the preceding data, the second unit is used to generate the duration of the backlight data and correct the duration of the backlight data, the third unit is used to generate the duration of the following data and correct the duration of the following data, and the accumulation unit is used to determine the duration of each bit.

[0042] The adjustment module includes a fourth unit, a fifth unit, and a sixth unit. The fourth unit is connected to the first unit and outputs either a first coefficient or a second coefficient to the first unit. The fifth unit is connected to the second unit and outputs either a first coefficient or a second coefficient to the second unit. The sixth unit is connected to the third unit and outputs either a first coefficient or a second coefficient to the third unit. Thus, each unit in the adjustment module can output either a first coefficient or a second coefficient to each unit in the data module, enabling the data modules to adjust the data duration and achieve dynamic changes in the transmission rate.

[0043] Of course, the data module can include a first unit, which is used to generate pre-amplifier data, backlight data, and post-amplifier data, and also to correct the duration of these data. Similarly, the adjustment module can include a fourth unit, which outputs either the first or second coefficient to the first unit. This simplifies the internal structure of both the data module and the adjustment module.

[0044] Furthermore, the backlight controller may also include an output module, which is connected between the data module and the backlight driver. The output module is used to transmit data signals to the backlight driver. Of course, the output module and the data module can also be integrated into one module, so that the data module also has an output function.

[0045] The following example illustrates the correction process.

[0046] 1. Taking the upward dynamic change mode, with a base transmission rate of 1Mbps, a second transmission rate of 1.1Mbps, a second coefficient of 10%, and corrections applied to front-end data, backlight data, and back-end data, as an example: At a transmission rate of 1 Mbps, the duration of each bit is 1 µs, the duration of the pre-processor data is 280 ns, the duration of the backlight data is 420 ns, and the duration of the post-processor data is 300 ns.

[0047] At a transmission rate of 1.1 Mbps, the duration of the corrected pre-processor data is 280 ns - 280 ns × 10% ≈ 250 ns, the duration of the corrected backlight data is 420 ns - 420 ns × 10% ≈ 390 ns, and the duration of the corrected post-processor data is 300 ns - 300 ns × 10% ≈ 270 ns. The sum of the durations of the corrected pre-processor data, the corrected backlight data, and the corrected post-processor data is approximately 0.9 μs. Therefore, at a transmission rate of 1.1 Mbps, the duration of each bit is 0.9 μs.

[0048] 2. Taking the downward dynamic change mode, with a base transmission rate of 1Mbps, a first transmission rate of 0.9Mbps, a first coefficient of 10%, and both front-end data and backlight data corrected, as an example: At a transmission rate of 0.9 Mbps, the duration of the corrected pre-processor data is 280 ns + 280 ns × 10% ≈ 310 ns, the duration of the corrected backlight data is 420 ns + 420 ns × 10% ≈ 470 ns, and the duration of the post-processor data remains 300 ns. The sum of the durations of the corrected pre-processor data, the corrected backlight data, and the uncorrected post-processor data is approximately 1.1 μs. Therefore, at a transmission rate of 0.9 Mbps, the duration of each bit is 1.1 μs.

[0049] Optionally, when extracting backlight data from the data signal, the backlight driver is specifically used to: determine the sampling time; and extract the backlight data from the data signal when the sampling time is reached. In this way, backlight data can be extracted based on the sampling time, which is beneficial for achieving effective backlight data acquisition.

[0050] Furthermore, the backlight driver is specifically used to determine the sampling time according to the following formula: SP=[(A1+A2) / 2]×(Tp+Td / 2) / (1 / f); A1 = 1 - B1; A2 = 1 + B2; Where SP represents the sampling time, f represents the crystal oscillator frequency in the backlight driver, each bit in the data signal includes pre-amplifier data, backlight data and post-amplifier data, Tp represents the duration of the pre-amplifier data, Td represents the duration of the backlight data, B1 represents the first coefficient, and B2 represents the second coefficient.

[0051] In practice, since each bit includes pre-processing data, backlight data, and post-processing data, the sampling time usually corresponds to the duration of the backlight data, thus effectively capturing the backlight data within each bit. However, when the transmission rate varies within the first range, if the second coefficient is large and the duration of the pre-processing data needs to be corrected, the corrected duration of the pre-processing data will be longer. The sampling time determined according to the original rules may then fail to guarantee that the sampling time falls within the duration of the backlight data, resulting in the inability to capture backlight data and leading to data mis-sampling.

[0052] In this embodiment of the invention, when determining the sampling time according to the above formula, the influence of the first coefficient and the second coefficient are considered. Even if the second coefficient is set relatively large, the sampling time can be corrected based on the second coefficient to ensure that the sampling time is within the duration of the backlight data, thereby achieving effective acquisition of backlight data and avoiding data mis-sampling. Furthermore, the above formula is based on the crystal oscillator frequency of the backlight driver, allowing the sampling time to be determined based on the crystal oscillator frequency of the backlight driver, thus improving the accuracy of the sampling time determination.

[0053] like Figure 5 As shown, Figure 5 In this formula, t0 represents the sampling time, pre represents the preceding data, data represents the backlight data, post represents the following data, T1 represents the time range in which the duration of the preceding data ends, T2 represents the time range in which the duration of the backlight data ends, and T3 represents the time range in which the duration of the following data ends. Using this formula to determine the sampling time t0 ensures that t0 falls within the duration of the backlight data, thus achieving effective backlight data acquisition.

[0054] Of course, in practice, the difference between the upper and lower limits of the first range is usually not too large, so the second coefficient will not be too large either. In this case, the sampling time can be determined by other rules different from the formula, such as, but not limited to, a fixed sampling time pre-configured based on experience. This can simplify the process of determining the sampling time and reduce the amount of computation.

[0055] Based on the same inventive concept, this embodiment of the invention also provides a data transmission method. The implementation principle of this data transmission method is basically similar to that of the backlight control system described in the foregoing embodiments. The implementation method and technical effects of this data transmission method can be found in the implementation method and technical effects of the foregoing backlight control system. Repeated descriptions will not be repeated.

[0056] For example, such as Figure 6 As shown, the data transmission method provided in this embodiment of the invention includes: S601. The backlight controller outputs a data signal to the backlight driver based on a transmission rate that varies within a first range; the first range is determined based on a reference transmission rate, and the transmission rate of the data signal fluctuates within the first range based on the reference transmission rate. S602, The backlight driver extracts backlight data from the data signal and drives the light-emitting unit to emit light according to the backlight data.

[0057] Based on the same inventive concept, embodiments of the present invention also provide a display device, such as... Figure 7 As shown, it includes: multiple light-emitting units, and a backlight control system as described in any of the embodiments above, wherein the backlight driver is connected to the backlight controller and the light-emitting units respectively.

[0058] Optionally, the display device may also include other structures, such as, but not limited to, liquid crystal displays and backlights; this is not a limitation. Figure 7 As shown, both the backlight driver and the light-emitting unit are mounted on the backlight panel. Figure 7 The connection relationship between the backlight driver and the light-emitting unit is not shown, and the number and arrangement of the backlight driver and the light-emitting unit are not limited to... Figure 7 As shown in the image.

[0059] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A backlight control system, characterized in that, It includes a backlight controller and a backlight driver, wherein the backlight driver is connected to the light-emitting unit; The backlight controller is configured to: output a data signal to the backlight driver according to a transmission rate that varies within a first range; the first range is determined based on a reference transmission rate, and the transmission rate of the data signal fluctuates within the first range based on the reference transmission rate; The backlight driver is used to: extract backlight data from the data signal, and drive the light-emitting unit to emit light according to the backlight data.

2. The backlight control system as described in claim 1, characterized in that, The first range is: from the reference transmission rate to the first transmission rate, or from the reference transmission rate to the second transmission rate, or from the first transmission rate to the second transmission rate; the first transmission rate is the difference between the product of the reference transmission rate and the first coefficient and the reference transmission rate; the second transmission rate is the sum of the product of the reference transmission rate and the second coefficient and the reference transmission rate.

3. The backlight control system as described in claim 2, characterized in that, The time it takes for the data signal transmission rate to change from the reference transmission rate to the target transmission rate and back to the reference transmission rate is a change cycle. The data signal transmission rate changes periodically based on the change cycle. The target transmission rate is either the first transmission rate or the second transmission rate.

4. The backlight control system as described in claim 2, characterized in that, The backlight driver is specifically used to: determine the sampling time; and extract the backlight data from the data signal when the sampling time is reached.

5. The backlight control system as described in claim 4, characterized in that, The backlight driver is specifically used to determine the sampling time according to the following formula: SP=[(A1+A2) / 2]×(Tp+Td / 2) / (1 / f); A1 = 1 - B1; A2 = 1 + B2; Wherein, SP represents the sampling time, f represents the crystal oscillator frequency in the backlight driver, each bit in the data signal includes pre-data, backlight data and post-data, Tp represents the duration of the pre-data, Td represents the duration of the backlight data, B1 represents the first coefficient, and B2 represents the second coefficient.

6. The backlight control system as described in claim 2, characterized in that, The backlight controller includes an adjustment module and a data module, wherein the data module is connected between the adjustment module and the backlight driver; The adjustment module is used to: output the first coefficient or the second coefficient to the data module; The data module is used to: determine the duration of each bit in the data signal based on the first coefficient or the second coefficient; and determine the transmission rate of the data signal based on the determined duration of each bit.

7. The backlight control system as described in claim 6, characterized in that, The data module is specifically used to: when each bit includes pre-data, backlight data, and post-data, correct the duration of at least one of the pre-data, backlight data, and post-data according to the first coefficient or the second coefficient, and calculate the sum of the duration of the corrected data and the duration of the uncorrected data in the pre-data, backlight data, and post-data.

8. The backlight control system as described in claim 7, characterized in that, The data module is specifically used to: when correcting the duration of at least two of the front-end data, the backlight data, and the rear-end data, use either the first coefficient or the second coefficient.

9. A data transmission method, characterized in that, The data transmission method is applied in the backlight control system as described in any one of claims 1-8, and the data transmission method includes: The backlight controller outputs a data signal to the backlight driver based on a transmission rate that varies within a first range; the first range is determined based on a reference transmission rate, and the transmission rate of the data signal fluctuates within the first range based on the reference transmission rate. The backlight driver extracts backlight data from the data signal and drives the light-emitting unit to emit light according to the backlight data.

10. A display device, characterized in that, include: The system comprises multiple light-emitting units and a backlight control system as described in any one of claims 1-8, wherein the backlight driver is connected to the backlight controller and the light-emitting units respectively.

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