CN111540321A - Control method and device of display panel - Google Patents
Control method and device of display panel Download PDFInfo
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- CN111540321A CN111540321A CN202010419138.0A CN202010419138A CN111540321A CN 111540321 A CN111540321 A CN 111540321A CN 202010419138 A CN202010419138 A CN 202010419138A CN 111540321 A CN111540321 A CN 111540321A
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- G—PHYSICS
- 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
- G09G3/36—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 using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
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Abstract
The invention discloses a control method and device of a display panel. The invention stores 2 frames of data through the memory, compares the data with the input data in the time schedule controller, starts the pretilt angle operation in advance when the input data is the first threshold value, and increases the output gray scale data so as to improve the response time of the dynamic frame. In addition, the invention reduces the occupied memory, improves the operation speed and further improves the response time of the dynamic frame by compressing the input data.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a control method and device of a display panel.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
The response speed of liquid crystal has been a problem of the liquid crystal panel that needs to be improved due to the liquid crystal characteristics of the liquid crystal panel. In order to improve the display effect of the dynamic image and reduce the dynamic smear phenomenon and the response time, an Over Drive (OD) technique is often used on the liquid crystal panel to increase the response speed of the intermediate gray scale. The technical principle is as follows: in order to shorten the response time from the previous frame (frontframe) to the target frame (target frame), the liquid crystal can quickly reach the transition angle by giving an overdrive voltage at the overdrive frame (OD frame).
However, in testing the response time, taking the case that pure black is changed into pure white, the former frame is a black frame (still frame), the latter frame is a white frame, and the frame is detected as a dynamic frame only by switching to the white frame, and at this time, the OD technique is adopted to adjust the pretilt angle high, which has no effect on the test response time.
Therefore, how to improve the response time of the liquid crystal is an important issue in the display technology.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device of a display panel, wherein 2 frames of data are stored by a memory and compared with input data in a time schedule controller, when the input data is a first threshold value, pretilt angle operation is started in advance, and output gray scale data are increased to improve the response time of a dynamic frame.
According to an aspect of the present invention, there is provided a control method of a display panel; the method comprises the following steps: acquiring input data, wherein the input data comprises 3 frames of continuous first data, second data and third data; compressing the input data; caching the first data to a first memory; transferring the first data in the first memory to a second memory; caching the second data to the first memory; performing overdrive table look-up on the second data in the first memory and the first data in the second memory; and outputting the most suitable quantized data in the first memory; when third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
Further, in the step of compressing the input data, a compression rate is greater than 10 times.
Further, the first memory includes a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
Further, the second memory includes a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
Further, the fourth data is between 0 gray scale and 10 gray scale.
According to another aspect of the present invention, there is provided a control apparatus of a display panel, including: an acquisition unit configured to acquire input data including 3 frames of continuous first data, second data, and third data; a compression unit for compressing the input data; a first buffer unit for buffering the first data to a first memory; the unloading unit is used for unloading the first data in the first memory to the second memory; a second buffer unit for buffering the second data to the first memory; the overdrive table look-up unit is used for performing overdrive table look-up on the second data in the first memory and the first data in the second memory; and an output unit for outputting the most suitable quantized data in the first memory; when third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
Further, the compression ratio of the compression unit is greater than 10 times.
Further, the first memory includes a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
Further, the second memory includes a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
Further, the fourth data is between 0 gray scale and 10 gray scale.
In the embodiment of the invention, the memory stores 2 frames of data, the data is compared with the input data in the time schedule controller, when the input data is the first threshold value, the pretilt angle operation is started in advance, and the output gray scale data is increased to improve the response time of the dynamic frame.
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The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic flowchart illustrating a control method of a display panel according to an embodiment of the present invention.
Fig. 2 is a block diagram of a control device of a display panel according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In particular embodiments, the drawings discussed below and the embodiments used to describe the principles of the present disclosure are by way of illustration only and should not be construed to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concepts. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of stated features, integers, steps, acts, or combinations thereof, as taught in the present specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
Referring to fig. 1, an embodiment of the invention provides a control method of a display panel, including the following steps.
In step S10, input data is acquired, where the input data includes 3 frames of consecutive first data, second data, and third data.
In an embodiment of the present invention, the input data may include at least a gray scale value of the image, and the input order is the first data, the second data, and the third data.
Step S20, the input data is compressed.
In the embodiment of the invention, the compression rate is larger than a certain value, for example, 10 times, the memory occupied by the input data is reduced through compression, the operation rate is increased, and the response time of the dynamic frame is improved.
Step S30, buffer the first data to the first memory.
In an embodiment of the present invention, the first data of the first memory includes a grayscale value of the image. In addition, the first memory includes, but is not limited to, a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
Step S40, the first data in the first memory is transferred to the second memory.
In the embodiment of the present invention, the second memory includes, but is not limited to, a synchronous dynamic random access memory or a double-rate synchronous dynamic random access memory. The first data in the second memory includes at least a grayscale value of the image.
Step S50, buffer the second data to the first memory.
In an embodiment of the present invention, the second data of the first memory includes a grayscale value of the image.
Step S60, performing overdrive table lookup on the second data in the first memory and the first data in the second memory.
And step S70, outputting the optimal quantized data in the first memory.
In the embodiment of the invention, the optimal quantized data is obtained and output by overdrive table look-up, so that the response speed of the panel is improved.
Step S80, when it is detected that the third data is the first threshold and the first data and the second data are both the second threshold, starting a pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
In the prior art, taking a black frame to a white frame as an example, when the response time is tested, the previous frame is a black frame (still frame), wherein the gray levels from 0 to 10 are all black frames, the next frame is a white frame, and the frame is detected as a dynamic frame only by switching to the white frame, and the response time is about 16 milliseconds at this time.
In the embodiment of the present invention, by storing 2 frames of data, comparing the stored data with the input data of the next frame in the memory of the timing controller, if it is detected that the input data is the first threshold, for example, the first threshold is 255 gray scales (white frames), and the data in the first memory and the data in the second memory are both the second threshold, for example, the second threshold is 0 gray scales, the data in the first memory and the data in the second memory are overdriven to look up a table, a pretilt angle operation is started, liquid crystal molecules are twisted by applying a corresponding overdrive voltage to generate a tilt angle of 0 ° to 2 °, so as to increase the data in the first memory, and the gray scale value is in 0 gray scales to 10 gray scales. And when the data in the first memory is changed into 255 gray scales and the data in the second memory is 0 gray scale, outputting the data in the first memory (255 gray scales), thereby improving the response time. For example, when the data in the first memory is increased to have a gray level value of 5 gray levels, the response time is 7 milliseconds. For another example, when the data in the first memory is increased to have a gray scale value of 10 gray scales, the response time is 6.32 milliseconds.
Referring to fig. 2, the embodiment of the invention provides a control device of a display panel, which includes an obtaining unit 101, a compressing unit 102, a first buffer unit 103, a dump unit 104, a second buffer unit 105, an overdrive table look-up unit 106, and an output unit 107.
Specifically, the acquisition unit 101 is configured to acquire input data including 3 frames of consecutive first data, second data, and third data.
In an embodiment of the present invention, the input data may include at least a gray scale value of the image, and the input order is the first data, the second data, and the third data.
The compression unit 102 is configured to compress the input data.
In the embodiment of the invention, the compression rate is larger than a certain value, for example, 10 times, the memory occupied by the input data is reduced through compression, the operation rate is increased, and the response time of the dynamic frame is improved.
The first buffer unit 103 is used for buffering the first data to the first memory.
In an embodiment of the present invention, the first data of the first memory includes a grayscale value of the image. In addition, the first memory includes, but is not limited to, a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
The unloading unit 104 is configured to unload the first data in the first memory to the second memory.
In the embodiment of the present invention, the second memory includes, but is not limited to, a synchronous dynamic random access memory or a double-rate synchronous dynamic random access memory. The first data in the second memory includes at least a grayscale value of the image.
The second buffer unit 105 is configured to buffer the second data into the first memory.
In an embodiment of the present invention, the second data of the first memory includes a grayscale value of the image.
The overdrive table lookup unit 106 is configured to perform overdrive table lookup on the second data in the first memory and the first data in the second memory.
The output unit 107 is used for outputting the most suitable quantized data in the first memory.
In the embodiment of the invention, the optimal quantized data is obtained and output by overdrive table look-up, so that the response speed of the panel is improved.
When third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
In the prior art, taking a black frame to a white frame as an example, when the response time is tested, the previous frame is a black frame (still frame), wherein the gray levels from 0 to 10 are all black frames, the next frame is a white frame, and the frame is detected as a dynamic frame only by switching to the white frame, and the response time is about 16 milliseconds at this time.
In the embodiment of the present invention, by storing 2 frames of data, comparing the stored data with the input data of the next frame in the memory of the timing controller, if it is detected that the input data is the first threshold, for example, the first threshold is 255 gray scales (white frames), and the data in the first memory and the data in the second memory are both the second threshold, for example, the second threshold is 0 gray scales, the data in the first memory and the data in the second memory are overdriven to look up a table, a pretilt angle operation is started, liquid crystal molecules are twisted by applying a corresponding overdrive voltage to generate a tilt angle of 0 ° to 2 °, so as to increase the data in the first memory, and the gray scale value is in 0 gray scales to 10 gray scales. And when the data in the first memory is changed into 255 gray scales and the data in the second memory is 0 gray scale, outputting the data in the first memory (255 gray scales), thereby improving the response time. For example, when the data in the first memory is increased to have a gray level value of 5 gray levels, the response time is 7 milliseconds. For another example, when the data in the first memory is increased to have a gray scale value of 10 gray scales, the response time is 6.32 milliseconds.
Referring to fig. 3, an embodiment of the present invention further provides a terminal device 200, where the terminal device 200 may be a mobile phone, a tablet, a computer, or other devices. As shown in fig. 3, the terminal device 200 includes a processor 201 and a memory 202. The processor 201 is electrically connected to the memory 202.
The processor 201 is a control center of the terminal device 200, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or loading an application program stored in the memory 202 and calling data stored in the memory 202, thereby performing overall monitoring of the terminal device.
In this embodiment, the terminal device 200 is provided with a plurality of memory partitions, the plurality of memory partitions includes a system partition and a target partition, the processor 201 in the terminal device 200 loads instructions corresponding to processes of one or more application programs into the memory 202 according to the following steps, and the processor 201 runs the application programs stored in the memory 202, so as to implement various functions:
acquiring input data, wherein the input data comprises 3 frames of continuous first data, second data and third data;
compressing the input data;
caching the first data to a first memory;
transferring the first data in the first memory to a second memory;
caching the second data to the first memory;
performing overdrive table look-up on the second data in the first memory and the first data in the second memory; and
outputting the most suitable quantized data in the first memory;
when third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, the present invention provides a storage medium, in which a plurality of instructions are stored, where the instructions can be loaded by a processor to execute the steps in any one of the control methods for a display panel provided by the embodiments of the present invention.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium can execute the steps in any of the methods for controlling a display panel provided by the embodiments of the present invention, the advantageous effects that can be achieved by any of the methods for controlling a display panel provided by the embodiments of the present invention can be achieved, which are detailed in the foregoing embodiments and will not be described again here. The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
In the embodiment of the invention, the memory stores 2 frames of data, the data is compared with the input data in the time schedule controller, when the input data is the first threshold value, the pretilt angle operation is started in advance, and the output gray scale data is increased to improve the response time of the dynamic frame.
The method and the device for controlling a display panel according to the embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are described herein by applying specific examples, and the description of the embodiments is only used to help understanding the method and the core concept of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A control method of a display panel, comprising:
acquiring input data, wherein the input data comprises 3 frames of continuous first data, second data and third data;
compressing the input data;
caching the first data to a first memory;
transferring the first data in the first memory to a second memory;
caching the second data to the first memory;
performing overdrive table look-up on the second data in the first memory and the first data in the second memory; and
outputting the most suitable quantized data in the first memory;
when third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
2. The method according to claim 1, wherein in the step of compressing the input data, a compression rate is greater than 10 times.
3. The method of claim 1, wherein the first memory comprises a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
4. The method of claim 1, wherein the second memory comprises a synchronous dynamic random access memory or a double rate synchronous dynamic random access memory.
5. The method of claim 1, wherein the fourth data is between 0 gray level and 10 gray level.
6. A control device for a display panel, comprising:
an acquisition unit configured to acquire input data including 3 frames of continuous first data, second data, and third data;
a compression unit for compressing the input data;
a first buffer unit for buffering the first data to a first memory;
the unloading unit is used for unloading the first data in the first memory to the second memory;
a second buffer unit for buffering the second data to the first memory;
the overdrive table look-up unit is used for performing overdrive table look-up on the second data in the first memory and the first data in the second memory; and
an output unit, for outputting the most suitable quantized data in the first memory;
when third data is detected to be a first threshold value and the first data and the second data are both second threshold values, starting pretilt angle operation, increasing the second data in the first memory, and outputting fourth data; and when the second data in the first memory is a first threshold value and the first data in the second memory is a second threshold value, outputting the second data in the first memory.
7. The apparatus of claim 6, wherein the compression unit has a compression ratio greater than 10 times.
8. The apparatus of claim 6, wherein the first memory comprises a synchronous dynamic random access memory or a double-rate synchronous dynamic random access memory.
9. The apparatus of claim 6, wherein the second memory comprises a synchronous dynamic random access memory or a double-rate synchronous dynamic random access memory.
10. The apparatus of claim 6, wherein the fourth data is between 0 gray level and 10 gray level.
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Application publication date: 20200814 |