Display data processing method, backlight module and display equipment

Abstract

The embodiment of the invention provides a display data processing method, a backlight module and a display device, the display data processing method is applied to a backlight driving chip in the backlight module, the backlight module comprises a backlight control chip and N backlight driving chips, N is an integer greater than or equal to 2, and N is an integer greater than or equal to 1. The method comprises the steps that for the first N-1 backlight driving chips in N backlight driving chips connected to the same data line, the level switching duration of each unit of data in received display data is acquired; under the condition that the level switching duration is larger than the preset duration, parameters of the display data are adjusted, the adjusted display data are sent to a next-stage backlight driving chip, and the parameters comprise the voltage conversion rate, the data transmission rate and the data identification duty ratio. Each backlight driving chip detects the received display data in real time and correspondingly adjusts the parameters of the display data according to the detection result, so that the recognition sensitivity of each backlight driving chip to the received display data is more accurately improved.

Description

Technical Field

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

[0002] Mini-LED backlight control needs to be completed by the cooperation of a backlight control chip and a backlight driver chip. Usually, at least one backlight control chip is required for each screen, which acts like a "main control switch" to control the backlight source. The backlight driver chip has multiple channels, and each channel corresponds to a backlight zone. The backlight control chip transmits data to all backlight driver chips, and the backlight driver chips drive each backlight zone.

[0003] In the backlight module, each output of the backlight control chip is connected to multiple backlight driver chips, and data is transmitted in a single-wire manner. 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 terminal of the first backlight driver chip, the output terminal of the first backlight driver chip is connected to the input terminal of the second backlight driver chip, the output terminal of the second backlight driver chip is connected to the input terminal of the third backlight driver chip, and so on. Data loss is inevitable during the transmission process, resulting in the slowdown of the rising edge and falling edge of the data. The rising edge and falling edge of the data received by the backlight drivers connected in series at the back become worse and worse, and in severe cases, the data cannot be recognized. Summary of the Invention

[0004] Embodiments of this 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, embodiments of this application provide 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, N≥2, and N is an integer. The backlight control chip sends display data to the N backlight driver chips through a data line. The method includes:

[0006] 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;

[0007] When the level switching duration is greater than a 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 the voltage conversion rate, the data transmission rate, and the data identification duty cycle. The preset duration indicates that there is data loss in the display data.

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

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

[0010] Adjust the target parameter of the display data and keep other parameters except the target parameter unchanged.

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

[0012] Based on the adjustment order of each parameter, judge whether the first parameter is the target parameter according to the adjustment range of the first parameter;

[0013] In the case where the first parameter is not the target parameter, judge whether the second parameter is the target parameter until a target parameter is determined.

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

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

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

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

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

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

[0020] Increase the data identification duty ratio in each unit of data in the display data.

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

[0022] Adjust each parameter of each unit of data in the display data.

[0023] In a second aspect, an embodiment of the present application provides a backlight module. The backlight module includes a backlight control chip and N backlight driving chips, where N≥2 and N is an integer. The backlight control chip sends display data to the N backlight driving chips through a data line;

[0024] Among the N backlight driving chips, the first N - 1 backlight driving chips are used to adjust the display data sent to the next-level backlight driving chip, and specifically used to execute the steps in the first aspect and / or various possible implementation manners of the first aspect.

[0025] In a possible implementation, the backlight control chip is further configured to set an initial value of a parameter of each unit of data in the display data sent to N backlight driving chips, where the initial value of the parameter includes a minimum voltage conversion rate, a maximum data transmission rate, and a minimum data identification duty ratio.

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

[0027] The display data processing method, backlight module, and display device provided by the embodiments of the present application are applied to a backlight driving chip in the backlight module. The backlight module includes a backlight control chip and N backlight driving chips, where N≥2 and N is an integer. The method includes: for the first N - 1 backlight driving chips among the N backlight driving chips, obtaining the level switching duration of each unit of data in the received display data; in a case where 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 driving chip, where the parameters include a voltage conversion rate, a data transmission rate, and a data identification duty ratio, and the preset duration indicates that there is loss in the display data. Each backlight driving chip performs real-time detection on the received display data, and adjusts the parameters of the display data according to the detection result, so as to more accurately improve the recognition sensitivity of each backlight driving chip to the received display data. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0029] Figure 1 It is a schematic connection diagram of a backlight control chip and a backlight driving chip provided in an embodiment;

[0030] Figure 2 It is a schematic diagram of the format of display data provided in an embodiment;

[0031] Figure 3 It is a schematic diagram of the format of each bit of data provided in an embodiment;

[0032] Figure 4 It is a schematic structural diagram of a backlight module provided in an embodiment;

[0033] Figure 5 It is a schematic flowchart of the display data processing method provided in an embodiment Figure 1 ;

[0034] Figure 6 Flow schematic of the display data processing method provided in an embodiment Figure 2 ;

[0035] Figure 7 Flow schematic of the display data processing method provided in an embodiment Figure 3 。

[0036] Through the above drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be provided hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of Specific Embodiments

[0037] Here, exemplary embodiments will be described in detail, and examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] In the drawings, the thicknesses of multiple layers and regions are shown in an enlarged manner to make them 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 may be intermediate layers, regions, or plates between them. On the contrary, when a layer, region, or plate is referred to as being "directly on" or "immediately adjacent to" another layer, region, or plate, there may be no intermediate layers, regions, or plates 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" the other layer, region, or plate, or there may be intermediate layers, regions, or plates between them. On the contrary, when a layer, region, or plate is referred to as being "directly below" another layer, region, or plate, there may be no intermediate layers, regions, or plates between them.

[0039] For ease of description, in this document, spatial relative terms such as "below", "beneath", "lower", "above", "upper", etc. may be used 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, in addition to the orientations illustrated in the drawings, the spatial relative terms are intended to encompass different orientations of the device during use or operation. For example, in the case where the device shown in the figure is flipped, a device located "below" or "beneath" another device may be placed "above" the other device. Thus, the exemplary term "below" may include both a lower position and an upper position. The device may also be oriented in another direction, and thus the spatial relative terms may be interpreted differently depending on the orientation.

[0040] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may 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 the present application can be understood according to specific circumstances. Throughout the 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 for the purpose of describing particular embodiments only and are not limiting. As used herein, the singular form "a" is also intended to include the plural form, unless the context clearly indicates otherwise. It will be further understood that when used in this specification, the terms "comprises" and / or "comprising" specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one" before a list of elements modify the entire list of elements without modifying each element of the list.

[0042] It should be understood that in the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0043] As used herein, the terms "about," "substantially," "approximate," and similar terms include the stated value and mean within an acceptable deviation range for a particular value as determined by one of ordinary skill in the art, taking into account the measurements discussed and the errors associated with the measurement of a 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. Additionally, when describing embodiments of the present application, the use of "may" refers to "one or more embodiments of the present disclosure." As used herein, the term "use" may be considered a synonym of the term "utilize" respectively.

[0044] The electronic or electrical device and / or any other related device or component according to the embodiments of the present application described herein, such as, for example, an external controller, a timing controller, a data driver, a scan driver, a grayscale voltage generator, a grayscale corrector, and a transmit driver, may be implemented using any suitable hardware, firmware (e.g., an application specific integrated circuit), software, or a combination of software, firmware, and hardware known to one of ordinary skill in the art. For example, the various components of these devices may be formed on one integrated circuit (IC) chip or on separate IC chips. Additionally, the various components of these devices may be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. Further, the various components of these devices may 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 functions described herein. The computer program instructions are stored in a memory, which may be implemented using a standard memory device such as random access memory (RAM) in a computing device. The computer program instructions may also be stored in other non-transitory computer-readable media, such as, for example, a CD-ROM or a flash drive, etc. Additionally, one of ordinary skill in the art should recognize that, without departing from the spirit and scope of the present application, 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 over one or more computing / electronic devices.

[0045] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this 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 construed as having an ideal or overly formal meaning unless expressly defined in this specification.

[0046] Mini-LED backlight control requires the cooperation of a backlight control chip and a backlight driver chip. Usually, at least one backlight control chip is required for each screen, which acts like a "main control switch" to control the backlight source. The backlight driver chip has multiple channels, and each channel corresponds to a backlight zone. The backlight control chip transmits data to all backlight driver chips, and the backlight driver chips drive each backlight zone.

[0047] In the backlight module, the output of the backlight control chip includes several control branches, and each control branch controls multiple series-connected backlight driver chips. As Figure 1 shown in the structure, the backlight control chip has two control branches. In each control branch, the backlight control chip and the backlight driver chip perform data transmission in a single-wire manner. The data output by the backlight control chip is input to the input terminal of the first backlight driver chip. The output terminal of the first backlight driver chip is connected to the input terminal of the second backlight driver chip, and the output terminal of the second backlight driver chip is connected to the input terminal 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, and 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 the display data transmission is as Figure 2 shown. The data format of each bit is as Figure 3 shown, including three parts: Pre, Data, and Post. Among them, Pre and Post are data identifiers, and Data is the data. Pre keeps a high level during the T1 time period, Post keeps a low level during the T3 time period, Data represents 1 when it keeps a high level during the T2 time period, and Data represents 0 when it keeps a low level. The time of each bit of data is Bit Time.

[0049] During the transmission of display data, losses are inevitably generated, resulting in the slowdown of the rising edge and falling edge of the display data. The rising edge and falling edge of the display data received by the subsequent series-connected backlight drivers become worse and worse, and in severe cases, the display data cannot be recognized.

[0050] To solve the above technical problems, the present application provides a display data processing method, which is applied to the backlight driver chip in the backlight module. As Figure 4 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. The backlight control chip 101 sends display data to the N backlight driver chips 102 through the data line. As Figure 5 shown, the method includes:

[0051] Step 502: For the first N - 1 backlight driving chips among the N backlight driving 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 greater than a preset duration, adjust the parameters of the display data, and send the adjusted display data to the next - level backlight driving chip. The parameters include the voltage conversion rate, the data transmission rate, and the data identification duty cycle. The preset duration indicates that there is loss in the display data.

[0053] Herein, each unit of data in the display data refers to the smallest unit in the data. In the digital world, the smallest unit is each bit of data. Therefore, each unit of data in the embodiments of the present application is also each bit of data. In the binary digital system, each bit of data has two states, 0 and 1. Corresponding to the signal, the high level represents 1, and the low level represents 0.

[0054] The level switching duration includes the duration required for the signal to switch from the low level to the high level and / or from the high level to the low level. In the signal, the former is represented by the rising edge, and the latter is represented by the falling edge. In the backlight driving chip 102, there is 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, which mainly depends on the specific circuit design, the driver characteristics, and the backlight control technology used. Therefore, they need to be obtained separately, and the level switching duration includes Tr and Tf.

[0055] The level switching duration can describe the change speed of the level in the signal. When there is loss in the signal, the rising edge and the falling edge of the carried display data will become slower, and the level switching duration will become longer. When the level switching duration is greater than a certain value, it indicates that the rising edge and the falling edge are getting worse and worse, which will cause the display data to be unrecognizable or have recognition errors.

[0056] Herein, the preset duration is the above - mentioned certain value, indicating that when the level switching duration is greater than the preset duration, the display data will be unrecognizable or have recognition errors, and it is necessary to adjust the level switching duration in the display data so that it is not greater than the preset duration. It should be noted that when the Tr and Tf durations of each unit of data in the display data are equal, only Tr or Tf needs to be obtained, and correspondingly, 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 driving chip needs to adjust the parameters of the display data, it can be judged according to one of Tr and Tf, or parameter adjustment can be performed when both Tr and Tf are greater than the corresponding preset durations.

[0057] The parameters of the display data include signal parameters and transmission parameters. The signal parameters refer to the parameters of each unit of data included in the signal. For example, each unit of data includes a data identifier and data, where the data identifier includes a data start identifier Pre and a data end identifier Post. The signal parameters include the duty cycle of the data identifier, which represents the proportion of the data identifier (Pre / Post part) in one bit duration (Bit Time) in each bit of data. For example, the duty cycle of the data identifier is 1:3:1, indicating that the proportion of the Pre part in each bit of data is 20% and the proportion of the Post part is 20%. The transmission parameters refer to the parameters describing the signal during transmission, such as the data transmission rate.

[0058] When each backlight driving chip 102 detects that the Tr and Tf of the display data do not meet the preset conditions, after adjusting the parameters of the display data, it is then transmitted to the next-level backlight driving chip, so that the next-level backlight driving chip receives high-quality display data. By the judgment and processing of the display data by each backlight driving chip 102, the recognition of the display data by each backlight driving chip is improved. When adjusting the parameters of the display data, one parameter can be adjusted each time. When the current parameter can no longer be adjusted, the next parameter is adjusted; or all parameters can be adjusted each time.

[0059] In the method provided by the above embodiment, the backlight module includes a backlight control chip and N backlight driving chips, N≥2, N is an integer. The method includes: for the first N - 1 backlight driving chips among the N backlight driving chips, obtaining the level switching duration of each unit of data in the received display data; when the level switching duration is greater than the preset duration, adjusting the parameters of the display data and sending the adjusted display data to the next-level backlight driving chip. The parameters include the voltage conversion rate, the data transmission rate, and the duty cycle of the data identifier. The preset duration indicates that there is loss in the display data. Each backlight driving chip detects the display data received in real time and adjusts the parameters of the display data according to the detection result, so as to more accurately improve the recognition sensitivity of each backlight driving chip to the received display data.

[0060] In one of the embodiments, as Figure 6 shown, adjusting the parameters of the display data includes:

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

[0062] Step 604, adjusting the target parameter of the display data and keeping the other parameters except the target parameter unchanged.

[0063] Among them, the adjustment order is a preset order. Following the principle that each backlight driving chip 102 adjusts only one parameter, the target parameter of each backlight driving chip 102 is determined according to the adjustment order.

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

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

[0066] Step 704, in the case where 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 adjustment range of the parameter refers to the selection of the parameter values that the backlight driving chip can achieve. According to the influence of each parameter on the level switching duration, all the parameter values in the adjustment range have a certain size order according to the influence on the level switching duration.

[0068] Each backlight driving chip starts from the first parameter according to the adjustment order of all parameters, compares the pre-adjustment value of the first parameter with the corresponding adjustment range, and determines whether there is a value in the adjustment range that can make the level switching duration smaller. If so, it is determined that the first parameter has an adjustment space and is determined as the target parameter for adjustment. If not, then the next parameter is judged until a target parameter is determined.

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

[0070] In one of the embodiments, the target parameter is the voltage conversion rate. Adjusting the target parameter of the display data includes:

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

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

[0073] The backlight driving chip includes a voltage conversion rate module for adjusting different voltage conversion rates (Slew Rate). The larger the voltage conversion rate, the larger the slopes of the rising edge and the falling edge, that is, the steeper the rising edge and the falling edge, and the shorter the level switching duration. The voltage conversion rate can be adjusted by adjusting the driving current, and a larger driving current corresponds to a larger voltage conversion rate. In other embodiments, the voltage conversion rate can also be adjusted by adjusting the driving buffer, and the larger the driving buffer, the larger the corresponding voltage conversion rate. Specifically, the number of buffers through which the selected output display data passes is selected.

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

[0075] In the method provided by the above embodiments, the voltage conversion rate has multiple adjustable levels through driving overcurrent or driving buffer, and the parameters of the display data can be adjusted more precisely.

[0076] In one of the embodiments, the target parameter is the data transmission rate. Adjusting the target parameter of the display data includes:

[0077] Reducing the data transmission rate when the backlight driving chip transmits the display data to the next-level backlight driving chip.

[0078] The smaller the data transmission rate, the longer the duration occupied by each bit of data, the smaller the proportion of the rising edge and the falling edge time in one bit time, and the lower the sensitivity of the backlight driving chip to the rising edge and the falling edge, and it is easier to identify the high and low levels.

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

[0080] In one of the embodiments, the target parameter is the data identification duty ratio. Adjusting the target parameter of the display data includes:

[0081] Increasing the data identification duty ratio in each unit of data in the display data.

[0082] In backlight driving, the larger the duty cycle of the data identifier (Pre / Post part), the smaller the proportion of the rising edge and falling edge time in one 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 cycles of Pre, Data, and Post can be 1:4:1, 1:3:1, 1:2:1, 1:1:1, etc., and the number of specific duty cycle settings can be set according to actual needs.

[0084] To facilitate the understanding of the solution in the above embodiments, a complete solution is given below for explanation. In an application scenario, the backlight control chip transmits display data to the cascaded backlight driving chips, and first transmits it at the maximum data transmission rate, the minimum Pre / Post duty cycle, and the lowest voltage conversion rate.

[0085] When the cascaded backlight driving chips in sequence detect that the rising edge duration Tr and falling edge duration Tf of the data in the received display data are not greater than the preset duration, the backlight driving chips keep the data transmission rate, the Pre / Post duty cycle, and the voltage conversion rate unchanged, and output the display data to the next-level backlight driving chip;

[0086] When it is transmitted to a certain backlight driving chip, and this backlight driving chip detects that the rising edge duration Tr and falling edge duration Tf are greater than the preset duration, this backlight driving chip increases the voltage conversion rate, keeps 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 driving chip. Since the voltage conversion rate is increased, the rising edge / falling edge of the data received by the next-level backlight driver becomes steeper, and the detected rising edge Tr and falling edge Tf become smaller.

[0087] In the above process, when the backlight driving chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset duration, the voltage conversion rate is continuously increased (the voltage conversion rate has multiple different gears); until at the maximum voltage conversion rate, the minimum duty cycle, and the maximum data transmission rate, when the backlight driving chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset duration, the Pre / Post duty cycle is increased, and the maximum voltage conversion rate and the maximum data transmission rate are maintained; similar to the voltage conversion rate, the Pre / Post duty cycle is increased in sequence until the Pre / Post duty cycle is the maximum. At the maximum voltage conversion rate, the maximum Pre / Post duty cycle, and the maximum data transmission rate, when the backlight driving chip detects that the rising edge duration Tr and the falling edge duration Tf are greater than the preset duration, the data transmission rate is decreased, and the maximum voltage conversion rate and the maximum Pre / Post duty cycle are maintained; similar to the voltage conversion rate, the data transmission rate is decreased in sequence until the data transmission rate is the minimum. When there is no adjustable space for the data transmission rate, the Pre / Post duty cycle, and the voltage conversion rate, no further adjustment will be made.

[0088] The above is only a specific embodiment, where the voltage conversion rate is adjusted first, then the Pre / Post duty cycle is adjusted, and finally the data transmission rate is adjusted. In another embodiment, the Pre / Post duty cycle can also be adjusted first, then the voltage conversion rate is adjusted, and finally the data transmission rate is adjusted. In other embodiments, the order of the voltage conversion rate, the Pre / Post duty cycle, and the data transmission rate can be changed arbitrarily; any multiple parameters can also be adjusted simultaneously, and the adjustment order can also be set arbitrarily.

[0089] Combined with the display data processing method provided in the above embodiments, the embodiment of the present application further provides a backlight module, which includes a backlight control chip and N backlight driving chips, N≥2, and N is an integer. The backlight control chip sends display data to the N backlight driving chips through a data line;

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

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

[0092] Combined with the display data processing method and the backlight module provided in the above embodiments, the embodiments of the present application further provide a display device, which includes a liquid crystal panel and the backlight module in any one of the above embodiments; the backlight module executes the display data processing method in any one of the above embodiments.

Claims

1. A display data processing method, characterized in that: The method is applied to a backlight driving chip in a backlight module, wherein the backlight module comprises a backlight control chip and N backlight driving chips, where N≥2 and N is an integer, and the backlight control chip sends display data to the N backlight driving chips via a data line; the method comprises: 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; When the level switching duration is greater 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.

2. The method according to claim 1, characterized in that The adjusting the parameters of the display data includes: Based on the adjustment order of each parameter, determine the target parameter; The target parameter of the display data is adjusted, and other parameters except the target parameter are kept unchanged.

3. The method according to claim 2, 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 a 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.

4. The method according to claim 2, 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 driving chip; or, The number of buffers through which the display data output by the backlight driving chip passes is increased.

5. The method according to claim 2, characterized in that: The target parameter is a data transmission rate, and the step of 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.

6. The method according to claim 2, characterized in that The target parameter is a duty cycle of a data identifier, 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.

7. 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.

8. A backlight module, characterized in that: The backlight module includes a backlight control chip and N backlight driving chips, N≥2, N is an integer, and the backlight control chip sends display data to the N backlight driving chips through 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 execute the method steps as claimed in any one of claims 1-7.

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

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

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