CN109616058B - Data transmission method and device and liquid crystal display device - Google Patents
Data transmission method and device and liquid crystal display device Download PDFInfo
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- CN109616058B CN109616058B CN201910100312.2A CN201910100312A CN109616058B CN 109616058 B CN109616058 B CN 109616058B CN 201910100312 A CN201910100312 A CN 201910100312A CN 109616058 B CN109616058 B CN 109616058B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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Abstract
The application discloses a data transmission method and device and a liquid crystal display device, and belongs to the technical field of display. The method comprises the following steps: acquiring initial backlight data, wherein the initial backlight data are represented by byte arrays, the initial backlight data comprise n groups of initial sub-backlight data, and the n groups of initial sub-backlight data correspond to the n brightness partitions one by one; performing data type conversion on the initial backlight data to obtain target backlight data, wherein the target backlight data comprises n groups of target sub-backlight data, the target sub-backlight data are represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data and are used for driving n brightness subareas to emit light by a backlight driving assembly; target backlight data is transmitted to a backlight driving assembly of the liquid crystal display device. The method and the device solve the problem that the time delay of the liquid crystal display device for displaying the image is large. The application is used for transmitting target backlight data.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a data transmission method and apparatus, and a liquid crystal display device.
Background
A Liquid Crystal Display (LCD) includes a Liquid Crystal Display panel and a backlight (Back Light) disposed on a Back surface of the Liquid Crystal Display panel, and the backlight is generally classified into a direct type backlight and a side type backlight. The direct type backlight source can adopt a Local Dimming technology to realize brightness partition control (namely, regional Dimming) so as to reduce the power consumption of the backlight source and improve the contrast of a display picture of the liquid crystal display device.
In the related art, the direct-type backlight source includes a plurality of Light-Emitting diodes (LEDs) arranged in an array, and at least two LEDs generally form a brightness partition, and the brightness of the LEDs in one brightness partition is the same. The liquid crystal display device further includes an Application Processor (AP) and a backlight driving assembly, and the process of displaying an image by the liquid crystal display device includes: the application processor acquires initial backlight data of an image to be displayed, wherein the initial backlight data comprises a plurality of groups of initial sub backlight data which are in one-to-one correspondence with the plurality of partitions, and the initial sub backlight data are represented by bytes; performing data type conversion on the initial backlight data to obtain target backlight data, wherein the target backlight data comprises a plurality of groups of target sub-backlight data which correspond to the plurality of groups of initial sub-backlight data one by one, and the target sub-backlight data is expressed by integer; transmitting the target backlight data to the backlight driving assembly; the backlight driving component drives the corresponding subarea to emit light based on each group of target sub-backlight data in the target backlight data so that the liquid crystal display device displays an image to be displayed.
However, in the related art, the data size of the target backlight data is large, and the process of transmitting the target backlight data to the backlight driving component by the application processor takes a long time, which may cause a time delay of displaying an image by the liquid crystal display device to be large.
Disclosure of Invention
The application provides a data transmission method and device and a liquid crystal display device, which can solve the problem that the time delay of the liquid crystal display device for displaying images is large. The technical scheme is as follows:
in one aspect, a data transmission method is provided for an application processor in a liquid crystal display device, where the liquid crystal display device includes a backlight source having n luminance partitions, where n is an integer greater than 1, and the method includes:
acquiring initial backlight data, wherein the initial backlight data are represented by byte arrays, the initial backlight data comprise n groups of initial sub-backlight data, and the n groups of initial sub-backlight data are in one-to-one correspondence with the n brightness partitions;
performing data type conversion on the initial backlight data to obtain target backlight data, wherein the target backlight data comprise n groups of target sub-backlight data, the target sub-backlight data are represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data and are used for driving the n brightness subareas to emit light by a backlight driving assembly;
and sending the target backlight data to a backlight driving component of the liquid crystal display device.
Optionally, the performing data type conversion on the initial backlight data to obtain target backlight data includes:
converting the byte array into a character string;
dividing the character string to obtain n sub-character strings, wherein the n sub-character strings correspond to the n groups of initial sub-backlight data one by one, and the n sub-character strings form a character string array with the length of n;
converting the character string array with the length of n into an integer array with the length of n;
generating a target character array with the length of m based on the integer array with the length of n, wherein the target character array with the length of m comprises n character elements, the n character elements are obtained by converting the integer array with the length of n, the n character elements are the n groups of target sub-backlight data, and m is larger than or equal to n.
Optionally, the generating the target character array with the length m based on the integer array with the length n includes:
creating a character array with the length of m;
assigning a value to the 1 st character element and the 2 nd character element in the character array by using an identification character, wherein the identification character is used for indicating that: the 3 rd character element in the character array is the 1 st group of target sub-backlight data in the target backlight data;
performing data type conversion on the n integer elements to obtain n target characters, wherein the data type conversion is performed on the ith integer element to obtain the ith target character, i is a positive integer, and i is more than or equal to 1 and less than or equal to n;
assigning values to n character elements in the character array by using the n target characters, wherein the ith target character is assigned to the (i + 2) th character element in the character array;
assigning a value to the (n + 3) th character element in the character array by using a check character to obtain the target character array, wherein the check character is used for indicating: and the (n + 2) th character element in the character array is the nth group of target sub-backlight data in the target backlight data.
Optionally, the sending the target backlight data to a backlight driving component of the liquid crystal display device further includes:
and sending the target character array to the backlight control assembly for the backlight control assembly to analyze the target character array to obtain the target backlight data, and sending the target backlight data to the backlight driving assembly.
Optionally, the character string has a plurality of blank characters, and segmenting the character string to obtain n substrings includes:
and determining the character between two adjacent blank characters as the sub-character string to obtain the n sub-character strings.
Optionally, the encoding format of the character string is universal code UTF-8.
Optionally, before the acquiring initial backlight data, the method further comprises:
creating a byte array with the length of a, wherein a is a positive integer and is more than or equal to n;
the acquiring initial backlight data comprises:
reading a target file to obtain n groups of initial sub-backlight data, wherein each group of initial sub-backlight data is represented by bytes;
assigning values to the first n byte elements in the byte array by using the n groups of initial sub-backlight data to obtain the initial backlight data, wherein the j-th group of initial sub-backlight data in the n groups of initial sub-backlight data is assigned to the j-th byte element in the n byte elements, j is a positive integer, and j is greater than or equal to 1 and less than or equal to n.
In another aspect, there is provided a data transmission device for an application processor in a liquid crystal display device, the liquid crystal display device including a backlight having n luminance sections, n being an integer greater than 1, the data transmission device including:
an obtaining module, configured to obtain initial backlight data, where the initial backlight data is represented by a byte array, and the initial backlight data includes n sets of initial sub-backlight data, and the n sets of initial sub-backlight data are in one-to-one correspondence with the n luminance partitions;
a conversion module, configured to perform data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data, the target sub-backlight data is represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data, and are used for driving the n luminance partitions to emit light by using a backlight driving component;
and the sending module is used for sending the target backlight data to a backlight driving component of the liquid crystal display device.
In still another aspect, there is provided a liquid crystal display device including: the backlight source is provided with n brightness partitions, and n is an integer greater than 1;
the memory for storing a computer program;
the application processor is used for executing the computer program stored in the memory to realize the data transmission method;
the backlight driving component is configured to receive target backlight data sent by the application processor, and drive the n luminance partitions to emit light according to the target backlight data, where the target backlight data includes n groups of target sub-backlight data, the target sub-backlight data is represented by characters, and the n groups of target sub-backlight data correspond to the n luminance partitions one to one.
Optionally, the liquid crystal display device further includes: a backlight control assembly;
the application processor is further configured to send a target character array with a length of m to the backlight control assembly, where the target character array with the length of m includes n character elements, the n character elements are n groups of target sub-backlight data in the target backlight data, and m is greater than or equal to n;
the backlight control component is used for analyzing the target character array to obtain the target backlight data and sending the target backlight data to the backlight driving component.
In yet another aspect, a computer-readable storage medium is provided, having instructions stored therein,
the computer readable storage medium, when run on a processing component, causes the processing component to perform the data transfer method described above.
The beneficial effect that technical scheme that this application provided brought includes at least:
the application provides a data transmission method and device and a liquid crystal display device, wherein an application processor performs data type conversion on initial backlight data to obtain target backlight data, and the target backlight data comprises n groups of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a data transmission method provided in an embodiment of the present application;
fig. 2 is a flowchart of another data transmission method provided in an embodiment of the present application;
FIG. 3 is a flowchart of a method for generating a target character array according to an embodiment of the present disclosure;
fig. 4 is a signal waveform diagram of an application processor for transmitting target backlight data provided by the related art;
fig. 5 is a signal waveform diagram of an application processor for transmitting target backlight data according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of data transmission provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of a conversion module according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The direct type backlight source can realize brightness partition control by adopting a local backlight adjusting technology, wherein the backlight source comprises a plurality of brightness partitions, and each brightness partition is composed of at least two LEDs. The liquid crystal display device includes an application processor and a backlight driving assembly. The application processor is used for performing data type conversion on initial backlight data corresponding to an image to be displayed to obtain target backlight data, the target backlight data comprise multiple groups of target sub-backlight data corresponding to the multiple partitions, and the application processor is further used for sending the target backlight data to the backlight driving assembly so that the backlight driving assembly respectively drives the multiple partitions in the backlight source to emit light according to the multiple groups of target sub-backlight data in the received target backlight data.
In the related art, each set of target sub-backlight data in the target backlight data is expressed by integer, so that the data size of each set of target sub-backlight data is 16 bits, the data size of the target sub-backlight data is large, and the data size of the target backlight data is large, so that the time consumed for sending the target backlight data to the backlight driving component by the application processor is long, and the time delay of displaying images by the liquid crystal display device is large. The embodiment of the application provides a data transmission method, which can reduce the data volume of target backlight data, further reduce the time consumed by transmitting the target backlight data, and reduce the time delay of an image displayed by a liquid crystal display device.
Fig. 1 is a flowchart of a data transmission method according to an embodiment of the present application. The method is used for an application processor in a liquid crystal display device, the liquid crystal display device comprises a backlight source, the backlight source is provided with n brightness partitions, n is an integer larger than 1, and the method comprises the following steps:
The n brightness partitions are n brightness partitions in a backlight of the liquid crystal display device, the backlight includes a plurality of LEDs arranged in an array, and each brightness partition may include at least one LED.
And 102, performing data type conversion on the initial backlight data to obtain target backlight data, wherein the target backlight data comprises n groups of target sub-backlight data, the target sub-backlight data is represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data and are used for driving n brightness subareas to emit light by the backlight driving component.
And 103, sending target backlight data to a backlight driving component of the liquid crystal display device.
To sum up, in the data transmission method provided in the embodiment of the present application, the application processor performs data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Fig. 2 is a flowchart of another data transmission method according to an embodiment of the present application. The method is used for a liquid crystal display device, and the liquid crystal display device can comprise: applying a processor, a backlight control component (e.g., a backlight Micro Control Unit (MCU)), a backlight driver component, and a backlight source, the backlight source including n luminance partitions, n being an integer greater than 1, the method may include:
step 201, the application processor creates a byte array with length a.
Wherein a is a positive integer, and a is more than or equal to n. Illustratively, the application processor creates a byte array, that is, the application processor allocates storage space for the backlight data corresponding to the n luminance partitions to be read.
Step 202, the application processor reads the target file to obtain n groups of initial sub-backlight data.
Each group of initial sub-backlight data is represented by a byte, the n groups of initial sub-backlight data correspond to n luminance partitions in the backlight source one by one, and each group of initial sub-backlight data can be represented by one byte, that is, the data type of the initial sub-backlight data is a byte type (also called byte type).
Alternatively, each set of initial sub-backlight data may represent the luminance of its corresponding luminance partition (the luminance may be represented by a gray-scale value), or may represent the driving voltage of its corresponding luminance partition, which is not limited in this embodiment of the application.
Optionally, the application processor may calculate, in advance, backlight data corresponding to the image to be displayed according to the image data of the image to be displayed, and store the calculated backlight data in the target file. Alternatively, the backlight data in the target file may also be calculated by other calculation components based on the image data of the image to be displayed and then stored in the target file, which is not limited in this embodiment of the application.
And j is a positive integer, and j is more than or equal to 1 and less than or equal to n.
For example, the application processor may assign values to the first n byte elements in the created byte array by using the read n groups of initial sub-backlight data, that is, sequentially store the n groups of initial sub-backlight data in the storage space allocated to the n groups of initial sub-backlight data, and further obtain the initial backlight data stored in the form of the byte array.
Step 204, the application processor converts the byte array into a character string.
The encoding Format of the character string may be a universal code Format (UTF-8).
The application processor may convert the initial sub-backlight data of the byte type in the initial backlight data into the initial sub-backlight data of the character string type (also referred to as string type). For example, after the application processor converts the byte array into the character string, a plurality of blank characters may exist in the character string, and the application processor may determine a character between two adjacent blank characters as a sub-character string, so as to obtain n sub-character strings corresponding to n sets of initial sub-backlight data one to one, that is, obtain the n sub-character strings by segmenting the character string. The application processor can create a character string array with the length of n, and assign values to n character string elements in the character string array by adopting the n sub-character strings so as to obtain the character string array with the length of n, which is formed by the n sub-character strings. At this time, the initial backlight data is stored in a form of a character string array, that is, the initial backlight data is represented by the character string array, and the data type of the initial sub-backlight data in the initial backlight data is the character string type.
Step 206, the application processor converts the string array with the length of n into an integer array with the length of n.
The application processor may convert the initial sub-backlight data of the character string type in the initial backlight data into an integer type (also referred to as int type) initial sub-backlight data. For example, the application processor may create an integer array with a length of n, assign n integer elements in the integer array by using n string elements (that is, n substrings) in the string array, and further obtain the assigned integer array with the length of n, that is, convert the string array into the integer array, that is, convert each substring in the string array into integer data. At this time, the initial backlight data is stored in the form of an integer array, and the data type of each set of initial sub-backlight data in the initial backlight data is integer.
Step 207, the application processor generates a target character array with length m based on the integer array with length n.
The target character array with the length of m comprises n character elements, the n character elements are obtained by conversion of the integer array with the length of n, the n character elements are n groups of target sub-backlight data, and m is larger than or equal to n. The target character array comprises target backlight data finally obtained after data type conversion is carried out on the initial backlight data. Alternatively, m is equal to n +3, and the explanation of step 207 is given below by taking m is equal to n +3 as an example.
Referring to fig. 3, the implementation process of step 207 may include:
And 2072, assigning values to the 1 st character element and the 2 nd character element in the character array by using the identification characters.
Wherein the identification character is used to indicate: the 3 rd character element in the character array with the length of m is the 1 st group of target sub-backlight data in the target backlight data. The character array with the length of m comprises m character elements, and the m character elements are respectively positioned at the 0 th bit to the m-1 th bit of the character array. In the embodiment of the application, the character elements positioned at the a-1 th position in the character array are called as the a-th character elements of the character array, a is an integer, and a is more than or equal to 1 and less than or equal to m. If the 1 st character element is the character element located at the 0 th bit of the character array, the 2 nd character element is the character element located at the 1 st bit of the character array. For example, the combination manner of the two identification characters is different from the combination manner of any two adjacent sets of target sub-backlight data in the n sets of target sub-backlight data, and the start position of the target backlight data can be determined by the two identification characters.
And 2073, performing data type conversion on the n integer elements to obtain n target characters.
And performing data type conversion on the ith integer element in the n integer elements to obtain the ith target character in the n target characters, wherein i is a positive integer and is more than or equal to 1 and less than or equal to n.
Wherein, the ith target character is assigned to the (i + 2) th character element in the character array.
And 2075, assigning the (n + 3) th character element in the character array by using the check character to obtain the target character array.
Wherein the check character is used to indicate: the (n + 2) th character element in the character array is the nth group of target sub-backlight data in the target backlight data. The 3 rd character element to the (n + 2) th character element of the target character array are n groups of target sub-backlight data, the n groups of target sub-backlight data form target backlight data, the target sub-backlight data in the target backlight data are represented by characters, that is, the data type of the target sub-backlight data is character type (also called char type).
Alternatively, m may be another value, for example, m ═ n +2, in which case the target character array may not include the check character, and the nth set of target sub-backlight data in the target backlight data may be determined by other data.
For example, a Serial Peripheral Interface (SPI) may be provided on the application processor, and the application processor may transmit the target character array to the backlight control component through the SPI.
After receiving the target character array, the backlight control component may determine a 1 st group of target sub-backlight data in the target backlight data according to a 1 st character element and a 2 nd character element in the target character array; and determining the last group of target sub-backlight data in the target backlight data according to the (n + 3) th character element in the target character array, and further obtaining complete target backlight data from the target character array.
After the backlight control assembly obtains the complete target backlight data, the target backlight data can be sent to the backlight driving assembly, and then the backlight driving assembly can perform Pulse Width Modulation (PWM) according to each group of target sub-backlight data to drive the luminance partition corresponding to the target sub-backlight data in the backlight source to emit light, so that the liquid crystal display device displays an image to be displayed.
For example, assuming that each set of initial sub-backlight data is the gray-scale value of its corresponding luminance partition in the embodiment of the present application, the byte array (i.e. the initial backlight data) determined by the application processor in step 203 is represented as: byte B0[ ] {127, 127, 127, 127, 127, 127}, where B0 denotes the array name of the array. The string converted by the application processor to the byte array in step 204 can be represented as: string B0 ═ 127127127127127127127127127127; the array of strings obtained by the application processor in step 205 is represented as: string B0[ ] { "127", "127", "127", "127", "127", "127", "127", "127", "127" }; the integer array resulting from the conversion of the string array by the application processor in step 206 is represented as: int B0[ ] {127, 127, 127, 127, 127, 127, 127, 127, 127, 127 }; the processor-generated target character array is applied in step 207 as char B0[ ] [ {170, 129, 127, 127, 127, 127, 127, 127, 127, 127, 0 }. The 1 st character element 170 and the 2 nd character element 129 in the target character array are identification characters, and the last character element 0 is a check character.
Optionally, the application processor may further send, to the backlight control component, check data independent of the target character array, where the check data is used to indicate an end position of the target backlight data (i.e. a last group of target sub-backlight data in the target backlight data), for example, the check data may be a group number of target sub-backlight data included in the target backlight data. The backlight control component may parse the target character array based on the verification data to obtain target backlight data.
In the related art, each set of target sub-backlight data in the target backlight data is represented by integer, such as short integer (also called short) or unsigned integer, so that the data size of each set of target sub-backlight data is 16 bits. However, in the backlight of the actual liquid crystal display device, the data amount of the backlight data corresponding to each luminance partition is only 8 bits, so that 8 bits of useless data exist in each set of target sub-backlight data in the related art. In the embodiment of the present application, each group of target sub-backlight data is represented by characters, and the data amount of each group of target sub-backlight data is 8 bits, so that the 8 bits of data are all useful backlight data corresponding to the luminance partition.
For example, referring to fig. 4, fig. 4 is a signal waveform diagram illustrating a related art application processor transmitting target backlight data. If the backlight data actually corresponding to one luminance partition is represented as "10010101" by binary data, the target sub-backlight data corresponding to the luminance partition in the related art is "1001010100000000". As can be seen from fig. 4, the transmission duration of a group of target sub-backlight data in the related art is a, and the application processor is transmitting useless data during a period of a/2. Fig. 5 is a signal waveform diagram illustrating the application processor transmitting the target backlight data in the embodiment of the present application, and it can be seen from fig. 5 that the target sub-backlight data transmitted by the application processor are all useful backlight data, and the time duration for transmitting a group of target sub-backlight data is a/2. Therefore, the application processor in the embodiment of the application does not need to send useless data, and the time consumption for transmitting the target backlight data is less.
To sum up, in the data transmission method provided in the embodiment of the present application, the application processor performs data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. The data transmission device is used for an application processor in a liquid crystal display device, the liquid crystal display device includes a backlight source, the backlight source has n brightness partitions, n is an integer greater than 1, as shown in fig. 6, the data transmission device 60 may include:
the obtaining module 601 is configured to obtain initial backlight data, where the initial backlight data is represented by a byte array, and the initial backlight data includes n sets of initial sub-backlight data, and the n sets of initial sub-backlight data correspond to the n luminance partitions one to one.
The conversion module 602 is configured to perform data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n sets of target sub-backlight data, the target sub-backlight data is represented by characters, and the n sets of target sub-backlight data are in one-to-one correspondence with the n sets of initial sub-backlight data, and are used for driving the backlight driving component to emit light in n brightness partitions.
A sending module 603, configured to send the target backlight data to a backlight driving component of the liquid crystal display device.
To sum up, in the data transmission device provided in the embodiment of the present application, the conversion module performs data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Alternatively, as shown in fig. 7, the conversion module 602 may include:
a first conversion submodule 6021 for converting the byte array into a character string.
The division submodule 6022 is configured to divide the character string to obtain n sub-character strings, where the n sub-character strings correspond to the n sets of initial sub-backlight data one to one, and the n sub-character strings form a character string array with a length of n.
A second conversion submodule 6023, configured to convert the string array with the length n into an integer array with the length n.
The generating submodule 6024 is configured to generate a target character array with a length m based on the integer array with the length n, where the target character array with the length m includes n character elements, the n character elements are obtained by converting the integer array with the length n, the n character elements are n sets of target sub-backlight data, and m is greater than or equal to n.
Optionally, the integer array with length n includes n integer elements, m is n +3, and the generation submodule 6024 is further configured to:
assigning a value to the 1 st character element and the 2 nd character element in the character array by using identification characters, wherein the identification characters are used for indicating: the 3 rd character element in the character array is the 1 st group of target sub-backlight data in the target backlight data;
performing data type conversion on the n integer elements to obtain n target characters, wherein the data type conversion is performed on the ith integer element to obtain the ith target character, i is a positive integer, and i is more than or equal to 1 and less than or equal to n;
assigning n character elements in the character array by using n target characters, wherein the ith target character is assigned to the (i + 2) th character element in the character array;
assigning the (n + 3) th character element in the character array by using a check character to obtain a target character array, wherein the check character is used for indicating: the (n + 2) th character element in the character array is the nth group of target sub-backlight data in the target backlight data.
Optionally, the liquid crystal display device further includes a backlight control component, and the sending module 603 is further configured to:
and sending the target character array to the backlight control assembly for the backlight control assembly to analyze the target character array to obtain target backlight data, and sending the target backlight data to the backlight driving assembly.
Optionally, there are multiple blanks in the string, and the segmentation submodule 6022 is further configured to:
and determining the character between two adjacent blank characters as a substring to obtain n substrings.
Optionally, the encoding format of the character string is the ten-thousand-country code UTF-8.
Optionally, the data transmission device 60 may further include:
the creating module is used for creating a byte array with the length of a, wherein a is a positive integer and is larger than or equal to n.
The obtaining module 601 may further be configured to:
reading a target file to obtain n groups of initial sub-backlight data, wherein each group of initial sub-backlight data is represented by bytes; assigning a j-th byte element in the byte array to a j-th group of initial sub-backlight data in n groups of initial sub-backlight data, wherein j is a positive integer and is more than or equal to 1 and less than or equal to n; and determining the byte number group after assigning the n groups of initial sub-backlight data as the initial backlight data.
To sum up, in the data transmission device provided in the embodiment of the present application, the conversion module performs data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Fig. 8 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application. As shown in fig. 8, the liquid crystal display device 80 may include: the backlight 818 includes n brightness partitions, n being an integer greater than 1, using a processor 801, a memory 802, a backlight driver 817, and a backlight 818.
The memory 802 is used to store computer programs; the application processor 801 is configured to execute a computer program stored in the memory 802 to implement the data transmission method shown in fig. 1 or fig. 2; the backlight driving component 817 is configured to receive target backlight data sent by the application processor 801, and drive n luminance partitions to emit light according to the target backlight data, where the target backlight data includes n sets of target sub-backlight data, the target sub-backlight data is represented by characters, and the n sets of target sub-backlight data are in one-to-one correspondence with the n luminance partitions.
Alternatively, the liquid crystal display device 80 may further include: the application processor 801 is further configured to send a target character array with a length of m to the backlight control module 819, where the target character array with the length of m includes n character elements, the n character elements represent n sets of target sub-backlight data in the target backlight data, and m is greater than or equal to n; the backlight control component 819 is configured to parse the target character array to obtain target backlight data, and send the target backlight data to the backlight driver component 817.
To sum up, in the liquid crystal display device provided in the embodiment of the present application, the application processor may perform data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n sets of target sub-backlight data represented by characters. Since the characters are adopted to represent the target sub-backlight data, and the data volume of each character is 8 bits, compared with the method that the target sub-backlight data is represented by integer in the related art, the data volume of the target sub-backlight data is reduced, the time consumed by the application processor for transmitting the target backlight data is further reduced, and the time delay of the liquid crystal display device for displaying the image is reduced.
Alternatively, the liquid crystal display device 80 may be a portable mobile terminal such as: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The liquid crystal display device 80 may also be a Virtual Reality (VR) device or an Augmented Reality (AR) device. The liquid crystal display device 80 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, and the like.
In general, the application processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The application processor 801 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The application processor 801 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the application processor 801 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the application processor 801 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
In some embodiments, the liquid crystal display device 80 may further include: a peripheral interface 803 and at least one peripheral. The application processor 801, memory 802 and peripheral interface 803 may be connected by a bus or signal line. Various peripheral devices may be connected to peripheral interface 803 by a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 804, a liquid crystal display 805, a camera 806, an audio circuit 807, a positioning component 808, and a power supply 809.
The peripheral interface 803 may be used to connect at least one peripheral device related to I/O (Input/Output) to the application processor 801 and the memory 802. In some embodiments, the application processor 801, memory 802, and peripheral interface 803 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the application processor 801, the memory 802, and the peripheral interface 803 may be implemented on separate chips or circuit boards, which are not limited by this embodiment.
The Radio Frequency circuit 804 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 804 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 804 converts an electrical signal into an electromagnetic signal to be transmitted, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 804 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 804 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 804 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.
The liquid crystal display 805 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When liquid crystal display 805 is a touch display, liquid crystal display 805 also has the ability to collect touch signals on or over the surface of liquid crystal display 805. The touch signal may be input as a control signal to the application processor 801 for processing. In this case, the liquid crystal display 805 may also be used to provide virtual buttons and/or virtual keyboards, also referred to as soft buttons and/or soft keyboards. In some embodiments, the liquid crystal display 805 may be one, and a front panel of the liquid crystal display device 80 is provided; in other embodiments, the number of the liquid crystal display panels 805 may be at least two, and the two liquid crystal display panels are respectively disposed on different surfaces of the liquid crystal display device 80 or are in a folded design. Even more, the liquid crystal display 805 may be arranged in a non-rectangular irregular pattern, that is, a shaped screen.
The camera assembly 806 is used to capture images or video. Optionally, camera assembly 806 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 806 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The audio circuit 807 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the application processor 801 for processing, or inputting the electric signals to the radio frequency circuit 804 to realize voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the liquid crystal display device 80. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the application processor 801 or the radio frequency circuit 804 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuit 807 may also include a headphone jack.
The positioning component 808 is used for positioning the current geographic position of the liquid crystal display device 80 to implement navigation or LBS (Location Based Service). The Positioning component 808 may be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.
The power supply 809 is used to supply power to each component in the liquid crystal display device 80. The power supply 809 can be ac, dc, disposable or rechargeable. When the power supply 809 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.
In some embodiments, the liquid crystal display device 80 further includes one or more sensors 810. The one or more sensors 810 include, but are not limited to: acceleration sensor 811, gyro sensor 812, pressure sensor 813, fingerprint sensor 814, optical sensor 815 and proximity sensor 816.
The acceleration sensor 811 can detect the magnitude of acceleration on three coordinate axes of the coordinate system established with the liquid crystal display device 80. For example, the acceleration sensor 811 may be used to detect the components of the gravitational acceleration in three coordinate axes. The application processor 801 may control the touch liquid crystal display 805 to display a user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 may also be used for acquisition of motion data of a game or a user.
The gyro sensor 812 may detect a body direction and a rotation angle of the liquid crystal display device 80, and the gyro sensor 812 may cooperate with the acceleration sensor 811 to acquire a 3D motion of the user on the liquid crystal display device 80. The application processor 801 may implement the following functions according to the data collected by the gyro sensor 812: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.
The pressure sensor 813 may be disposed on a side frame of the liquid crystal display device 80 and/or a lower layer of the touch liquid crystal display panel 805. When the pressure sensor 813 is disposed on the side frame of the liquid crystal display device 80, the holding signal of the user to the liquid crystal display device 80 can be detected, and the application processor 801 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is disposed on the lower layer of the touch liquid crystal display 805, control of an operability control on the UI interface is realized by the application processor 801 in accordance with a pressure operation of the user on the touch liquid crystal display 805. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.
The fingerprint sensor 814 is used for collecting a fingerprint of the user, and the application processor 801 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the identity of the user according to the collected fingerprint. Upon identifying that the user's identity is a trusted identity, the application processor 801 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 814 may be disposed on the front, back, or side of the liquid crystal display device 80. When a physical button or a manufacturer Logo is provided on the liquid crystal display device 80, the fingerprint sensor 814 may be integrated with the physical button or the manufacturer Logo.
The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, the application processor 801 may control the display brightness of the touch screen liquid crystal display 805 based on the ambient light intensity collected by the optical sensor 815. Specifically, when the ambient light intensity is high, the display luminance of the touch liquid crystal display screen 805 is increased; when the ambient light intensity is low, the display brightness of the touch liquid crystal display 805 is turned down. In another embodiment, the application processor 801 may also dynamically adjust the shooting parameters of the camera assembly 806 according to the ambient light intensity collected by the optical sensor 815.
The proximity sensor 816, also called a distance sensor, is generally provided on the front panel of the liquid crystal display device 80. The proximity sensor 816 is used to collect the distance between the user and the front surface of the liquid crystal display device 80. In one embodiment, when the proximity sensor 816 detects that the distance between the user and the front surface of the liquid crystal display device 80 gradually decreases, the application processor 801 controls the touch liquid crystal display panel 805 to switch from the bright screen state to the dark screen state; when the proximity sensor 816 detects that the distance between the user and the front surface of the liquid crystal display device 80 gradually becomes larger, the application processor 801 controls the touch liquid crystal display 805 to switch from the breath-screen state to the bright-screen state.
Those skilled in the art will appreciate that the configuration shown in fig. 8 does not constitute a limitation of the liquid crystal display device 80, and may include more or fewer components than those shown, or combine some components, or adopt a different arrangement of components.
Embodiments of the present application also provide a non-transitory computer-readable storage medium, such as a memory, comprising instructions executable by a processor to perform the video playback method described above. For example, the non-transitory computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.
Embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the above-mentioned data transmission method.
It should be noted that: in the data transmission device provided in the above embodiment, when transmitting data, only the division of the above functional modules is taken as an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the data transmission device is divided into different functional modules to complete all or part of the above described functions.
It should be noted that, the method embodiments provided in the embodiments of the present application can be mutually referred to corresponding device embodiments and liquid crystal display device embodiments, and the embodiments of the present application do not limit this. The sequence of the steps of the method embodiments provided in the embodiments of the present application can be appropriately adjusted, and the steps can be correspondingly increased or decreased according to the situation, and any method that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall be covered by the protection scope of the present application, and therefore, the details are not repeated.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A data transmission method for an application processor in a liquid crystal display device, the liquid crystal display device including a backlight source having n luminance sections, n being an integer greater than 1, the method comprising:
acquiring initial backlight data, wherein the initial backlight data are represented by byte arrays, the initial backlight data comprise n groups of initial sub-backlight data, and the n groups of initial sub-backlight data are in one-to-one correspondence with the n brightness partitions;
performing data type conversion on the initial backlight data to obtain target backlight data, wherein the target backlight data comprise n groups of target sub-backlight data, the target sub-backlight data are represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data and are used for driving the n brightness subareas to emit light by a backlight driving assembly;
and sending the target backlight data to a backlight driving component of the liquid crystal display device.
2. The method of claim 1, wherein the performing data type conversion on the initial backlight data to obtain target backlight data comprises:
converting the byte array into a character string;
dividing the character string to obtain n sub-character strings, wherein the n sub-character strings correspond to the n groups of initial sub-backlight data one by one, and the n sub-character strings form a character string array with the length of n;
converting the character string array with the length of n into an integer array with the length of n;
generating a target character array with the length of m based on the integer array with the length of n, wherein the target character array with the length of m comprises n character elements, the n character elements are obtained by converting the integer array with the length of n, the n character elements are the n groups of target sub-backlight data, and m is larger than or equal to n.
3. The method of claim 2, wherein the n-length integer array comprises n integer elements, and m is n +3, and wherein generating the m-length target character array based on the n-length integer array comprises:
creating a character array with the length of m;
assigning a value to the 1 st character element and the 2 nd character element in the character array by using an identification character, wherein the identification character is used for indicating that: the 3 rd character element in the character array is the 1 st group of target sub-backlight data in the target backlight data;
performing data type conversion on the n integer elements to obtain n target characters, wherein the data type conversion is performed on the ith integer element to obtain the ith target character, i is a positive integer, and i is more than or equal to 1 and less than or equal to n;
assigning values to n character elements in the character array by using the n target characters, wherein the ith target character is assigned to the (i + 2) th character element in the character array;
assigning a value to the (n + 3) th character element in the character array by using a check character to obtain the target character array, wherein the check character is used for indicating: and the (n + 2) th character element in the character array is the nth group of target sub-backlight data in the target backlight data.
4. The method of claim 2 or 3, wherein the liquid crystal display device further comprises a backlight control component, and wherein sending the target backlight data to a backlight driving component of the liquid crystal display device comprises:
and sending the target character array to the backlight control assembly for the backlight control assembly to analyze the target character array to obtain the target backlight data, and sending the target backlight data to the backlight driving assembly.
5. The method according to claim 2 or 3, wherein a plurality of blank characters exist in the character string, and the dividing the character string into n sub-character strings comprises:
and determining the character between two adjacent blank characters as the sub-character string to obtain the n sub-character strings.
6. The method according to claim 2 or 3,
the encoding format of the character string is a ten-thousand-national code UTF-8.
7. A data transmission device for use in an application processor in a liquid crystal display device including a backlight having n luminance divisions, n being an integer greater than 1, the data transmission device comprising:
an obtaining module, configured to obtain initial backlight data, where the initial backlight data is represented by a byte array, and the initial backlight data includes n sets of initial sub-backlight data, and the n sets of initial sub-backlight data are in one-to-one correspondence with the n luminance partitions;
a conversion module, configured to perform data type conversion on the initial backlight data to obtain target backlight data, where the target backlight data includes n groups of target sub-backlight data, the target sub-backlight data is represented by characters, and the n groups of target sub-backlight data are in one-to-one correspondence with the n groups of initial sub-backlight data, and are used for driving the n luminance partitions to emit light by using a backlight driving component;
and the sending module is used for sending the target backlight data to a backlight driving component of the liquid crystal display device.
8. A liquid crystal display device, comprising: the backlight source is provided with n brightness partitions, and n is an integer greater than 1; characterized in that the liquid crystal display device also comprises a memory,
the memory for storing a computer program;
the application processor, configured to execute the computer program stored in the memory, and implement the data transmission method according to any one of claims 1 to 6;
the backlight driving component is configured to receive target backlight data sent by the application processor, and drive the n luminance partitions to emit light according to the target backlight data, where the target backlight data includes n groups of target sub-backlight data, the target sub-backlight data is represented by characters, and the n groups of target sub-backlight data correspond to the n luminance partitions one to one.
9. The liquid crystal display device according to claim 8, further comprising: a backlight control assembly;
the application processor is further configured to send a target character array with a length of m to the backlight control assembly, where the target character array with the length of m includes n character elements, the n character elements are n groups of target sub-backlight data in the target backlight data, and m is greater than or equal to n;
the backlight control component is used for analyzing the target character array to obtain the target backlight data and sending the target backlight data to the backlight driving component.
10. A computer-readable storage medium having instructions stored therein,
the computer readable storage medium, when run on a processing component, causes the processing component to perform the data transmission method of any of claims 1 to 6.
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| CN112530377A (en) * | 2020-12-08 | 2021-03-19 | 康佳集团股份有限公司 | Backlight display control chip and display device |
| CN113160760B (en) * | 2021-04-12 | 2022-09-27 | Tcl华星光电技术有限公司 | Time schedule controller, driving method thereof and display device |
| CN113643667B (en) * | 2021-08-13 | 2023-06-06 | 京东方科技集团股份有限公司 | Display device, control method thereof and related equipment |
| WO2023206490A1 (en) * | 2022-04-29 | 2023-11-02 | 京东方科技集团股份有限公司 | Liquid crystal display device, and control module and integrated board thereof |
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| CN101330614B (en) * | 2007-06-21 | 2011-04-06 | 中兴通讯股份有限公司 | Method for implementing motion estimation of fraction pixel precision using digital signal processor |
| CN104702952B (en) * | 2014-01-21 | 2018-02-27 | 杭州海康威视数字技术股份有限公司 | A kind of image data compression method |
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| CN106021153A (en) * | 2016-05-16 | 2016-10-12 | 安徽华米信息科技有限公司 | Data transmission method and device and intelligent electronic equipment |
| CN108462553B (en) * | 2017-02-17 | 2021-04-13 | 中国移动通信集团内蒙古有限公司 | Data transmission method and device and electronic equipment |
| CN106981273A (en) * | 2017-06-01 | 2017-07-25 | 青岛海信电器股份有限公司 | Backlight brightness control devices, image display device |
| CN107068072A (en) * | 2017-06-01 | 2017-08-18 | 青岛海信电器股份有限公司 | Backlight brightness control devices, image display device |
| CN107483850B (en) * | 2017-08-11 | 2019-12-17 | 西安电子科技大学 | low-delay high-definition digital image transmission method |
| CN109040011A (en) * | 2018-06-14 | 2018-12-18 | 深圳市买买提信息科技有限公司 | Method, apparatus, system and the terminal device of data processing |
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