Display data processing method, backlight module and display device

Abstract

The embodiments of the present application provide a display data processing method, a backlight module, and a display device, which are applied to a backlight driver chip in a backlight module. The backlight module includes a backlight control chip and N backlight driver chips, where N≥2 and N is an integer. The method includes: for the first N-1 backlight driver chips among the N backlight driver chips connected to the same data line, obtaining the level switching duration of each unit of data in the received display data; when the level switching duration is greater than a preset duration, adjusting the parameters of the display data and sending the adjusted display data to the next-level backlight driver chip. The parameters include voltage conversion rate, data transmission rate, and data identification duty cycle. Each backlight driver chip performs real-time detection on the received display data and adjusts the parameters of the display data accordingly based on the detection results, thereby more accurately improving the recognition sensitivity of each backlight driver chip to the received display data.

Description

Technical Field

[0001] The present application relates to the technical field of backlight control, and in particular to a display data processing method, a backlight module and a display device. Background Art

[0002] Mini-LED backlight control requires a backlight control chip and a backlight driver chip. Typically, each screen requires at least one backlight control chip, which acts like a "master switch" to control the backlight source. The backlight driver chip has multiple channels, each corresponding to a backlight partition. The backlight control chip transmits data to all backlight driver chips, which then drive each backlight partition.

[0003] In a backlight module, each output of the backlight control chip is connected to multiple backlight driver chips, using a single-line method for data transmission. Multiple backlight driver chips connected to the same data line are connected in series. For example, the data output by the backlight control chip is input to the input of the first backlight driver chip, the output of the first backlight driver chip is connected to the input of the second backlight driver chip, the output of the second backlight driver chip is connected to the input of the third backlight driver chip, and so on. Data loss is inevitable during transmission, causing the rising and falling edges of the data to slow down. The rising and falling edges of the data received by the subsequent backlight drivers in series become increasingly poor, and in severe cases, the data becomes unrecognizable. Summary of the Invention

[0004] Embodiments of the present application provide a display data processing method, a backlight module, and a display device to enhance the recognizability of display data.

[0005] In a first aspect, an embodiment of the present application provides a display data processing method, which is applied to a backlight driver chip in a backlight module. The backlight module includes a backlight control chip and N backlight driver chips, where N is an integer and N is greater than or equal to 2. The backlight control chip sends display data to the N backlight driver chips via a data line. The method includes:

[0006] For the first N-1 backlight driver chips among the N backlight driver chips, obtaining a level switching duration of each unit of data in the received display data;

[0007] When the level switching duration is longer than the preset duration, the parameters of the display data are adjusted and the adjusted display data are sent to the next-level backlight driver chip. The parameters include voltage conversion rate, data transmission rate and data identification duty cycle. The preset duration indicates that there is loss in the display data.

[0008] In a possible implementation, adjusting parameters of display data includes:

[0009] Determine the target parameters based on the adjustment order of each parameter;

[0010] Adjust the target parameter of the displayed data and keep all other parameters unchanged.

[0011] In a possible implementation, determining the target parameter based on the adjustment order of each parameter includes:

[0012] Based on the adjustment order of each parameter and the adjustment range of the first parameter, determine whether the first parameter is the target parameter;

[0013] If the first parameter is not the target parameter, determine whether the second parameter is the target parameter, until a target parameter is determined.

[0014] In a possible implementation, the target parameter is a voltage conversion rate, and adjusting the target parameter of the display data includes:

[0015] Increase the driving current of the backlight driver chip; or,

[0016] Increase the number of buffers through which the display data output by the backlight driver chip passes.

[0017] In a possible implementation, the target parameter is a data transmission rate, and adjusting the target parameter of the display data includes:

[0018] Reduce the data transmission rate when the backlight driver chip transmits display data to the next level backlight driver chip.

[0019] In a possible implementation, the target parameter is a data identification duty cycle, and adjusting the target parameter of the display data includes:

[0020] Increase the data identification duty cycle per unit data in the displayed data.

[0021] In a possible implementation, adjusting parameters of display data includes:

[0022] Each parameter of each unit of data in the displayed data is adjusted.

[0023] In a second aspect, an embodiment of the present application provides a backlight module, the backlight module including a backlight control chip and N backlight driver chips, where N is an integer and N is greater than or equal to 2, and the backlight control chip sends display data to the N backlight driver chips via a data line;

[0024] The first N-1 backlight driver chips among the N backlight driver chips are used to adjust the display data sent to the next-level backlight driver chip, and are specifically used to perform the steps of the first aspect and / or various possible implementation methods of the first aspect.

[0025] In a possible implementation, the backlight control chip is further configured to set initial parameter values ​​for each unit of display data sent to the N backlight driver chips. The initial parameter values ​​include a minimum voltage conversion rate, a maximum data transmission rate, and a minimum data identification duty cycle.

[0026] In a third aspect, an embodiment of the present application provides a display device, comprising a liquid crystal panel and a backlight module as in the second aspect and / or the embodiment of the second aspect; the backlight module executes a display data processing method as in the first aspect and / or the embodiment of the first aspect.

[0027] The display data processing method, backlight module, and display device provided in the embodiments of the present application are applied to the backlight driver chip in the backlight module. The backlight module includes a backlight control chip and N backlight driver chips, where N≥2 and N is an integer. The method includes: for the first N-1 backlight driver chips among the N backlight driver chips, obtaining the level switching duration of each unit of data in the received display data; when the level switching duration is greater than a preset duration, adjusting the parameters of the display data and sending the adjusted display data to the next-level backlight driver chip. The parameters include voltage conversion rate, data transmission rate, and data identification duty cycle. The preset duration indicates that there is loss in the display data. Each backlight driver chip performs real-time detection on the received display data and adjusts the parameters of the display data accordingly based on the detection results, thereby more accurately improving the recognition sensitivity of each backlight driver chip to the received display data. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] Figure 1 A schematic diagram of the connection between a backlight control chip and a backlight driver chip provided in one embodiment;

[0030] Figure 2 A schematic diagram of a format of display data provided in one embodiment;

[0031] Figure 3 A schematic diagram of the format of each bit of data provided in one embodiment;

[0032] Figure 4 A schematic structural diagram of a backlight module provided in one embodiment;

[0033] Figure 5 A flow chart of a display data processing method provided in one embodiment Figure 1 ;

[0034] Figure 6 A flow chart of a display data processing method provided in one embodiment Figure 2 ;

[0035] Figure 7 A flow chart of a display data processing method provided in one embodiment Figure 3 .

[0036] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0038] In the accompanying drawings, the thickness of multiple layers and regions is shown in an exaggerated manner to make it clear and easy to describe. When a layer, region or plate is referred to as being "on" or "adjacent to" another layer, region or plate, it can be directly on the other layer, region or plate, or there can be an intermediate layer, region or plate between them. Conversely, when a layer, region or plate is referred to as being "directly on" or "immediately adjacent to" another layer, region or plate, there can be no intermediate layer, region or plate between them. In addition, when a layer, region or plate is referred to as being "below" another layer, region or plate, it can be "directly below" another layer, region or plate, or there can be an intermediate layer, region or plate between them. Conversely, when a layer, region or plate is referred to as being "directly below" another layer, region or plate, there can be no intermediate layer, region or plate between them.

[0039] For ease of description, spatially relative terms such as "below," "beneath," "below," "above," "above," etc. may be used herein to describe the relationship between one element or component and another element or component as shown in the accompanying drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations illustrated in the accompanying drawings. For example, where the device shown in the figures is flipped over, a device that is "below" or "beneath" another device may be placed "above" the other device. Thus, the exemplary term "below" may include both a below position and an above position. The device may also be oriented in another direction, so the spatially relative terms may be interpreted differently depending on the orientation.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific circumstances. Throughout this specification, when an element is referred to as being "connected" to another element, the element is "directly connected" to the other element, or "electrically connected" to the other element with one or more intermediate elements interposed therebetween.

[0041] The terms used herein are only used for the purpose of describing specific embodiments and are not restrictive. As used herein, the singular form "one" is intended to also include the plural form, unless the context clearly indicates otherwise. It will be further understood that when used in this specification, the terms "include" and / or "comprise" specify the presence of features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items. Expressions such as "at least one" before a list of elements modify the entire list of elements without modifying the individual elements of the list.

[0042] It should be understood that, in the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0043] As used herein, "about," "substantially," "approximately," and similar terms are inclusive of the stated value and mean within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the value. In addition, when describing embodiments of the present application, the use of "can" refers to "one or more embodiments of the present disclosure." As used herein, the term "using" can be considered a synonym for the term "utilizing," respectively.

[0044] The electronic or electrical devices and / or any other related devices or components according to the embodiments of the present application described herein, such as, for example, external controllers, timing controllers, data drivers, scan drivers, grayscale voltage generators, grayscale correctors, and emission drivers, can be implemented using any suitable hardware, firmware (e.g., application specific integrated circuits), software, or a combination of software, firmware, and hardware known to those skilled in the art. For example, the various components of these devices can be formed on an integrated circuit (IC) chip or on separate IC chips. In addition, the various components of these devices can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of these devices can be processes or threads running on one or more processors in one or more computing devices, executing computer program instructions and interacting with other system components to perform the various functionalities described herein. The computer program instructions are stored in a memory, which can be implemented in a computing device using standard memory devices such as random access memory (RAM). The computer program instructions can also be stored in other non-transitory computer-readable media, such as, for example, a CD-ROM or a flash drive. In addition, one of ordinary skill in the art should recognize that the functionality of various computing / electronic devices may be combined or integrated into a single computing / electronic device, or the functionality of a particular computing / electronic device may be distributed across one or more computing / electronic devices without departing from the spirit and scope of the present application.

[0045] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be understood as having an ideal or overly formal meaning unless explicitly defined in this specification.

[0046] Mini-LED backlight control requires a backlight control chip and a backlight driver chip. Typically, each screen requires at least one backlight control chip, which acts like a "master switch" to control the backlight source. The backlight driver chip has multiple channels, each corresponding to a backlight partition. The backlight control chip transmits data to all backlight driver chips, which then drive each backlight partition.

[0047] In the backlight module, the output of the backlight control chip includes several control branches, and each control branch controls multiple backlight driver chips connected in series. Figure 1 In the structure shown, the backlight control chip has two control branches. In each control branch, the backlight control chip and the backlight driver chip transmit data through a single line. The data output by the backlight control chip is input into the input end of the first backlight driver chip. The output end of the first backlight driver chip is connected to the input end of the second backlight driver chip. The output end of the second backlight driver chip is connected to the input end of the third backlight driver chip, and so on.

[0048] Among them, display data usually exists in the form of digital signals. These digital signals are composed of multiple bits, each bit represents a state of 0 or 1. By combining multiple bits, different grayscale, brightness or color information can be represented. The format of 0 and 1 in display data transmission is as follows Figure 2 As shown. The data format of each bit is as follows Figure 3 As shown in the figure, it consists of three parts: Pre, Data, and Post. Pre and Post are data identifiers, and Data is the data. Pre remains high during time period T1, Post remains low during time period T3, and Data remains high during time period T2, indicating a 1, while Data remains low, indicating a 0. The time for each bit of data is the bit time.

[0049] Display data inevitably suffers from loss during transmission, causing the rising and falling edges of the display data to slow down. The rising and falling edges of the display data received by the backlight driver connected in series become increasingly worse, and in severe cases, the display data becomes unrecognizable.

[0050] In order to solve the above technical problems, the present application provides a display data processing method, which is applied to a backlight driver chip in a backlight module, such as Figure 4 As shown, the backlight module includes a backlight control chip 101 and N backlight driver chips 102, N ≥ 2, N is an integer, the N backlight driver chips 102 are connected to the same data line of the backlight control chip 101, and the backlight control chip 101 sends display data to the N backlight driver chips 102 through the data line. Figure 5 As shown, the method includes:

[0051] Step 502: For the first N-1 backlight driver chips among the N backlight driver chips, obtain the level switching duration of each unit of data in the received display data;

[0052] Step 504, when the level switching duration is longer than the preset duration, adjust the parameters of the display data and send the adjusted display data to the next-level backlight driver chip. The parameters include voltage conversion rate, data transmission rate and data identification duty cycle. The preset duration indicates that there is loss in the display data.

[0053] The term "per unit data" in the displayed data refers to the smallest unit of data. In the digital world, the smallest unit is a bit of data. Therefore, the term "per unit data" in the embodiments of the present application also refers to a bit of data. In the binary digital system, a bit of data has two states, 0 and 1. A high level in the signal represents a 1, and a low level represents a 0.

[0054] The level switching duration includes the time required for the signal to switch from a low level to a high level, and / or from a high level to a low level. In the signal, the former is represented by a rising edge, and the latter is represented by a falling edge. The backlight driver chip 102 has a detection module for detecting the rising edge duration Tr and the falling edge duration Tf of the received display data. It should be noted that the rising edge duration Tr and the falling edge duration Tf are not necessarily equal. This mainly depends on the specific circuit design, driver characteristics, and the backlight control technology used. Therefore, they need to be obtained separately. The level switching duration includes Tr and Tf.

[0055] The level switching duration describes the speed at which the signal's level changes. When the signal is lossy, the rising and falling edges of the displayed data will slow down, and the level switching duration will increase. When the level switching duration exceeds a certain value, the characterization of rising and falling edges becomes increasingly poor, resulting in unrecognizable displayed data or recognition errors.

[0056] Among them, the preset duration is the above-mentioned certain numerical value, which indicates that when the level switching duration is greater than the preset duration, the display data will not be recognized or there will be recognition errors, and the level switching duration in the display data needs to be adjusted so that it is not greater than the preset duration. It should be noted that when the Tr and Tf durations of each unit data in the display data are equal, only Tr or Tf can be obtained, and accordingly, only one preset duration needs to be set. When Tr and Tf are not equal, corresponding preset durations need to be set for Tr and Tf respectively. When judging whether the backlight driver chip needs to adjust the parameters of the display data, it can be judged based on one of Tr and Tf, or it can be that the parameters are adjusted when both Tr and Tf are greater than the corresponding preset durations.

[0057] Display data parameters include signal parameters and transmission parameters. Signal parameters refer to the parameters of each unit of data contained in the signal. For example, each unit of data includes a data identifier and data. The data identifier includes the data start identifier (Pre) and the data end identifier (Post). Signal parameters include the data identifier duty cycle, which indicates the proportion of the data identifier (Pre / Post portion) to the bit time (bit time) in each bit of data. For example, a data identifier duty cycle of 1:3:1 means that the Pre portion of each bit of data accounts for 20% and the Post portion accounts for 20%. Transmission parameters describe the parameters of the signal during transmission, such as the data transmission rate.

[0058] When each backlight driver chip 102 detects that the display data's Tr and Tf do not meet preset conditions, it adjusts the display data's parameters before transmitting them to the next-level backlight driver chip, ensuring that the next-level backlight driver chip receives high-quality display data. Each backlight driver chip 102's judgment and processing of display data improves its ability to identify the display data. When adjusting display data parameters, it's possible to adjust only one parameter at a time. If the current parameter cannot be adjusted any further, the next parameter is adjusted. Alternatively, all parameters can be adjusted simultaneously.

[0059] In the method provided in the above embodiment, the backlight module includes a backlight control chip and N backlight driver chips, where N is an integer and N is greater than or equal to 2. The method includes: for the first N-1 backlight driver chips among the N backlight driver chips, obtaining the level switching duration of each unit of data in the received display data; if the level switching duration is greater than a preset duration, adjusting the parameters of the display data, and sending the adjusted display data to the next-level backlight driver chip. The parameters include the voltage conversion rate, the data transmission rate, and the data identification duty cycle, and the preset duration indicates the loss of display data. Each backlight driver chip detects the display data received in real time and adjusts the display data parameters accordingly based on the detection results, thereby more accurately improving the recognition sensitivity of each backlight driver chip to the received display data.

[0060] In one embodiment, Figure 6 As shown, adjust the parameters of the displayed data, including:

[0061] Step 602, determining the target parameter based on the adjustment order of each parameter;

[0062] Step 604: Adjust the target parameters of the display data, and keep other parameters except the target parameters unchanged.

[0063] The adjustment sequence is a pre-set sequence, and the target parameter of each backlight driver chip 102 is determined according to the adjustment sequence, following the principle of adjusting only one parameter for each backlight driver chip 102 .

[0064] Specifically, such as Figure 7 As shown, based on the adjustment order of each parameter, the target parameters are determined, including:

[0065] Step 702 , based on the adjustment order of each parameter and the adjustment range of the first parameter, determining whether the first parameter is the target parameter;

[0066] Step 704: If the first parameter is not the target parameter, determine whether the second parameter is the target parameter, until a target parameter is determined.

[0067] Among them, the parameter adjustment range refers to the selection of parameter values ​​that can be achieved by the backlight driver chip. According to the impact of each parameter on the level switching time, all parameter values ​​in the parameter adjustment range have a certain size order according to their impact on the level switching time.

[0068] Each backlight driver chip adjusts all parameters in order, starting from the first parameter, and compares the pre-adjustment value of the first parameter with the corresponding adjustment range to determine whether there is a value in the adjustable range that can shorten the level switching time. If so, it is determined that the first parameter has adjustment space and is determined as the target parameter for adjustment. If not, the next parameter is determined until a target parameter is determined.

[0069] In the method provided in the above embodiment, a target adjustment parameter is determined according to a set order, so that all backlight driver chips have more adjustment possibilities, thereby avoiding the situation where the subsequent backlight driver chips have no adjustment space.

[0070] In one embodiment, the target parameter is a voltage conversion rate, and adjusting the target parameter of the display data includes:

[0071] Increase the driving current of the backlight driver chip; or,

[0072] Increase the number of buffers through which the display data output by the backlight driver chip passes.

[0073] The backlight driver chip includes a voltage slew rate module for adjusting different voltage slew rates. The greater the voltage slew rate, the greater the slope of the rising and falling edges—that is, the steeper the rising and falling edges, the shorter the level switching duration. The voltage slew rate can be adjusted by adjusting the drive current; a larger drive current corresponds to a larger voltage slew rate. In other embodiments, the voltage slew rate can also be adjusted by adjusting the drive buffer; a larger drive buffer corresponds to a greater voltage slew rate. Specifically, the number of buffers through which the output display data passes is selected.

[0074] For example, the driving current for the rising / falling edge corresponding to Slew Rate 1 is α; the driving current for the rising / falling edge corresponding to Slew Rate 2 is 2 α; the driving current for the rising / falling edge corresponding to Slew Rate 3 is 4 α, and so on. The larger the driving current, the steeper the corresponding rising / falling edge slope.

[0075] In the method provided in the above embodiment, the voltage conversion rate has multiple adjustable levels by driving the overcurrent or driving the buffer, so that the parameters of the display data can be adjusted more accurately.

[0076] In one embodiment, the target parameter is a data transmission rate, and adjusting the target parameter of the display data includes:

[0077] Reduce the data transmission rate when the backlight driver chip transmits display data to the next level backlight driver chip.

[0078] The lower the data transmission rate, the longer each bit of data takes up, the smaller the proportion of the rising and falling edge time in a bit time, and the backlight driver chip's sensitivity to the rising and falling edges also decreases, making it easier to identify high and low levels.

[0079] For example, the data transmission rate between the backlight control chip 101 and the backlight driver chip 102 can be 1 Mbps, 5 Mbps, 10 Mbps, 20 Mbps, etc. The specific number of data transmission rates can be set according to actual needs. By reducing the data transmission rate when the backlight driver chip transmits display data to the next-level backlight driver chip, the backlight driver chip 102's recognition sensitivity to display data is increased.

[0080] In one embodiment, the target parameter is a data identification duty cycle, and adjusting the target parameter of the display data includes:

[0081] Increase the data identification duty cycle per unit data in the displayed data.

[0082] In backlight driving, the larger the duty cycle of the data identification (Pre / Post part), the smaller the proportion of the rising edge and falling edge time in a bit time, the lower the sensitivity to the rising edge and falling edge, and the easier it is to identify high and low levels.

[0083] For example, the duty ratios of Pre, Data, and Post can be 1:4:1, 1:3:1, 1:2:1, 1:1:1, etc. The specific number of duty ratio settings can be set according to actual needs.

[0084] To facilitate understanding of the solutions in the above embodiments, a complete solution is provided below for explanation. In one application scenario, the backlight control chip transmits display data to the series-connected backlight driver chip, initially at the maximum data transmission rate, minimum Pre / Post duty cycle, and lowest voltage conversion rate.

[0085] When the backlight driver chips connected in series detect that the rising edge duration Tr and the falling edge duration Tf of the received display data are not greater than the preset durations, the backlight driver chips maintain the data transmission rate, Pre / Post duty cycle and voltage conversion rate unchanged, and output the display data to the next backlight driver chip;

[0086] When transmitted to a backlight driver chip, if the backlight driver chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset durations, the backlight driver chip increases the voltage conversion rate, maintains the data transmission rate and the Pre / Post duty cycle unchanged, and outputs the display data with the increased voltage conversion rate to the next-level backlight driver chip. Due to the increased voltage conversion rate, the rising and falling edges of the data received by the next-level backlight driver become steeper, and the detected rising edge Tr and falling edge Tf become shorter.

[0087] In the above process, when the backlight driver chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset durations, the voltage slew rate (the voltage slew rate has multiple different levels) is continuously increased until, at the maximum voltage slew rate, minimum duty cycle, and maximum data transmission rate, the backlight driver chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset durations. At this point, the Pre / Post duty cycle is increased, maintaining the maximum voltage slew rate and maximum data transmission rate. Similarly to the voltage slew rate, the Pre / Post duty cycle is sequentially increased until the Pre / Post duty cycle is maximum. At the maximum voltage slew rate, maximum Pre / Post duty cycle, and maximum data transmission rate, the backlight driver chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset durations. Similarly to the voltage slew rate, the data transmission rate is sequentially decreased until the data transmission rate is minimum. If the data transmission rate, Pre / Post duty cycle, or voltage slew rate have no adjustable range, no further adjustment is made.

[0088] The above is merely a specific example, in which the voltage slew rate is adjusted first, followed by the Pre / Post duty cycle, and finally the data transfer rate. In another embodiment, the Pre / Post duty cycle can be adjusted first, followed by the voltage slew rate, and finally the data transfer rate. In other embodiments, the order of the voltage slew rate, Pre / Post duty cycle, and data transfer rate can be arbitrarily changed; any number of parameters can be adjusted simultaneously, and the order of adjustment can be set arbitrarily.

[0089] In combination with the display data processing method provided in the above embodiment, the embodiment of the present application further provides a backlight module, the backlight module includes a backlight control chip and N backlight driver chips, N ≥ 2, N is an integer, the backlight control chip sends display data to the N backlight driver chips via a data line;

[0090] The first N-1 backlight driver chips among the N backlight driver chips are used to adjust the display data sent to the next-level backlight driver chip, and are specifically used to execute the steps in any one of the above display data processing methods.

[0091] In one embodiment, the backlight control chip is further used to set the initial parameter value of each unit data in the display data sent to N backlight driver chips, and the initial parameter value includes the minimum voltage conversion rate, the maximum data transmission rate and the minimum data identification duty cycle.

[0092] In combination with the display data processing method and backlight module provided in the above embodiments, an embodiment of the present application also provides a display device, which includes a liquid crystal panel and a backlight module in any of the above embodiments; the backlight module executes the display data processing method in any of the above embodiments.

Claims

1. A display data processing method, characterized in that: The method is applied to a backlight driver chip in a backlight module, wherein the backlight module includes a backlight control chip and N backlight driver chips, where N is an integer and N is greater than or equal to 2. The backlight control chip sends display data to the N backlight driver chips via a data line. The method includes: For the first N-1 backlight driver chips among the N backlight driver chips, obtaining a level switching duration per unit of data in the received display data; if the level switching duration is greater than a preset duration, adjusting parameters of the display data, and sending the adjusted display data to a next-level backlight driver chip, the parameters including a voltage conversion rate, a data transmission rate, and a data identification duty cycle, the preset duration indicating loss of display data; The adjusting the parameters of the display data includes: Determine the target parameters based on the adjustment order of each parameter; The target parameter of the display data is adjusted, and other parameters except the target parameter are kept unchanged.

2. The method according to claim 1, characterized in that The step of determining the target parameter based on the adjustment order of each parameter includes: Based on the adjustment order of each parameter and according to the adjustment range of the first parameter, determining whether the first parameter is the target parameter; When the first parameter is not the target parameter, it is determined whether the second parameter is the target parameter, until a target parameter is determined.

3. The method according to claim 1, characterized in that The target parameter is a voltage conversion rate, and the step of adjusting the target parameter of the display data includes: Increasing the driving current of the backlight driver chip; or, Increase the number of buffers through which the display data output by the backlight driving chip passes.

4. The method according to claim 1, wherein The target parameter is a data transmission rate, and the adjusting the target parameter of the display data includes: The data transmission rate when the backlight driving chip transmits display data to the next-level backlight driving chip is reduced.

5. The method according to claim 1, characterized in that The target parameter is a data identification duty cycle, and the step of adjusting the target parameter of the display data includes: The duty cycle of the data identifier in each unit of data in the display data is increased.

6. The method according to claim 1, characterized in that The adjusting the parameters of the display data includes: Each parameter of each unit data in the display data is adjusted.

7. A backlight module, characterized in that: The backlight module includes a backlight control chip and N backlight driver chips, where N is an integer and N is greater than or equal to 2. The backlight control chip sends display data to the N backlight driver chips via a data line. The first N-1 backlight driver chips among the N backlight driver chips are used to adjust the display data sent to the next-level backlight driver chip, and are specifically used to perform the method steps according to any one of claims 1-6.

8. The backlight module according to claim 7, wherein: The backlight control chip is further used to set initial parameter values ​​for each unit of display data sent to the N backlight driving chips. The initial parameter values ​​include a minimum voltage conversion rate, a maximum data transmission rate, and a minimum data identification duty cycle.

9. A display device, characterized in that: The display device includes a liquid crystal panel and a backlight module according to any one of claims 7 to 8; the backlight module executes the display data processing method according to any one of claims 1 to 6.

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