CN115225838A - Control device and method based on FPGA and display equipment - Google Patents

Abstract

The application provides a control device and method based on an FPGA (field programmable gate array) and display equipment, relates to a video processing technology, and can be applied to a liquid crystal display screen comprising a liquid crystal panel, a backlight plate and a driving chip of the backlight plate. The control device includes: the first communication unit is electrically connected with the SOC and used for acquiring source video data from the SOC; the first processing unit is electrically connected with the first communication unit and used for extracting backlight data from the source video data and respectively transmitting the backlight data to the second processing unit and the third processing unit; the second processing unit is used for optimizing the backlight data and transmitting the optimized backlight data to the driving chip so as to control backlight display; the third processing unit is used for obtaining first image data according to the backlight data and the source video data and transmitting the first image data to the liquid crystal panel so as to display images. The application can reduce the requirement on SOC.

Description

FPGA-based control device, method and display device

technical field

The present application relates to video processing technology, and in particular, to an FPGA-based control device, method, and display device.

Background technique

With the continuous advancement of video processing technology, the application of liquid crystal displays is becoming more and more extensive. From the technical development trend, through the technology of local backlight adjustment (Local Dimming) and light-emitting diode (Light-Emitting Diode, referred to as LED) backlight technology, it is easy to reduce the power, improve the contrast value of the display screen, improve the gray scale and Reduce effects such as afterimages.

At present, the implementation architecture of local backlight adjustment includes a low-partition local backlight adjustment scheme and a high-partition local backlight adjustment scheme. Among them, in the low-partition local backlight adjustment scheme, the system-level chip (System on Chip, SOC for short) outputs image data to the timing controller (timing controller, abbreviated as TCON) board, and is driven by light-emitting diodes (LED Driver, that is, The driving mode of the driving chip of the backlight board) outputs the backlight data to the light-emitting diode drive; after that, the liquid crystal display is driven by the TCON board, and the LED lamp on the backlight board is driven by the driving chip of the backlight board. In the high partition local backlight adjustment scheme, a Microcontroller Unit (MCU) or Field Programmable Gate Array (FPGA) is added between the SOC and the backlight to process the backlight. The work of the driver chip has improved part of the processing capacity, and the number of partitions has been improved.

During the research process, the inventor found that the implementation architecture of the above-mentioned local backlight adjustment has at least the following defects:

The SOC function is fixed, and the back-end driving method is relatively fixed. It is very difficult to replace the driver chip type of the backlight board, and a new SOC needs to be remade. The collocation is inflexible, and the cost of re-casting is high. order to reduce costs.

SUMMARY OF THE INVENTION

The present application provides an FPGA-based control device, method and display device to reduce the requirements on SOC.

In a first aspect, an embodiment of the present application provides an FPGA-based control device, which is applied to a liquid crystal display screen, and the liquid crystal display screen includes a liquid crystal panel, a backlight panel, and a driver chip for the backlight panel. The control device includes: a first processing unit, a second processing unit, a third processing unit and a first communication unit. The first communication unit is electrically connected to the SOC, the first processing unit is electrically connected to the first communication unit, and the second processing unit and the third processing unit are electrically connected to the first processing unit, respectively. The first communication unit is used to obtain source video data from the SOC. The first processing unit is used for extracting the backlight data from the source video data, and transmitting the backlight data to the second processing unit and the third processing unit respectively. The second processing unit is used for optimizing the backlight data, and transmitting the optimized backlight data to the driving chip to control the backlight display. The third processing unit is configured to obtain the first image data according to the backlight data and the source video data, and transmit the first image data to the liquid crystal panel to display an image corresponding to the first image data.

In a possible implementation manner, the second processing unit may include a first processing subunit and a first communication subunit. Wherein, the first processing subunit is connected between the first processing unit and the first communication subunit. The first processing sub-unit is configured to use a preset backlight optimization algorithm to optimize the backlight data to obtain optimized backlight data. The first communication sub-unit is used for transmitting the optimized backlight data to the driving chip according to the driving mode of the backlight panel.

In a possible implementation manner, the third processing unit may include a second processing subunit, a third processing subunit and a second communication subunit. Wherein, the second processing subunit is electrically connected with the first processing unit, and the third processing subunit is connected between the second processing subunit and the second communication subunit. The second processing subunit is used for obtaining image compensation data according to the backlight data and the preset backlight smoothing algorithm. The third processing subunit is configured to perform fusion processing on the image compensation data and the source video data to obtain the first image data. The second communication sub-unit is used for transmitting the first image data to the liquid crystal panel.

In a possible implementation manner, the liquid crystal display screen may further include a touch chip, and the touch chip is used to detect a touch operation on the liquid crystal display screen, and obtain touch data based on the touch operation. Correspondingly, the above-mentioned control apparatus may further include: a fourth processing unit and a second communication unit. Wherein, the second communication unit is electrically connected with the touch chip, and the fourth processing unit is electrically connected between the second communication unit and the third processing unit. The second communication unit is used for acquiring touch data from the touch chip. The fourth processing unit is configured to obtain second image data corresponding to the liquid crystal panel according to the touch data. The third processing unit may also be used to perform superimposition processing on the first image data and the second image data, and transmit the superimposed data to the liquid crystal panel.

In a possible implementation manner, the fourth processing unit may be specifically configured to: store the touch data in a position corresponding to the storage space of the liquid crystal panel according to the coordinates to obtain the second image data.

In a possible implementation manner, the third processing unit may be specifically configured to: perform superimposition processing on the first image data and the second image data based on a preset superimposition ratio, and transmit the superimposed data to the liquid crystal panel.

In a possible implementation manner, the above control device may further include: a storage unit, the storage unit is electrically connected to the first communication unit and the third processing unit. The storage unit may be used to store source video data.

In a possible implementation manner, the above-mentioned control device may further include: a control unit. The control unit is used for controlling the second processing unit and the third processing unit to transmit the optimized backlight data or the first image data synchronously.

In a second aspect, an embodiment of the present application provides an FPGA-based control method, which is applied to a liquid crystal display screen. The liquid crystal display screen includes a liquid crystal panel, a backlight panel and a driving chip of the backlight panel. The control method includes:

Get source video data from SOC;

Extract backlight data from source video data;

Optimize the backlight data, and transmit the optimized backlight data to the driver chip of the backlight panel to control the backlight display;

The first image data is obtained according to the backlight data and the source video data, and the first image data is transmitted to the liquid crystal panel to display an image.

In a third aspect, an embodiment of the present application provides a display device, including: an SOC, a liquid crystal display screen, and the control device according to any one of the first aspects, wherein the liquid crystal display screen includes a liquid crystal panel, a backlight panel, and the backlight the driver chip of the board.

In a possible implementation manner, the display device may further include: a memory electrically connected to the first communication unit and the third processing unit for storing the source video data.

In a possible implementation manner, the liquid crystal display further includes: a touch chip for detecting a touch operation on the liquid crystal display, obtaining touch data based on the touch operation, and transmitting the touch data to the FPGA-based control device, so that the FPGA-based The control device generates a corresponding image according to the touch data.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium; when the computer program is executed, the method according to any one of the second aspects is implemented.

In a fifth aspect, an embodiment of the present application provides a computer program product, where the computer program product includes a computer program; when the computer program is executed, the method according to any one of the second aspects is implemented.

The FPGA-based control device, method, and display device provided by the embodiments of the present application relate to video processing technology, and can be applied to a liquid crystal display screen including a liquid crystal panel, a backlight panel, and a driver chip for the backlight panel. The control device includes: a first communication unit electrically connected to the SOC for acquiring source video data from the SOC; a first processing unit electrically connected to the first communication unit for extracting backlight data from the source video data, and The backlight data are respectively transmitted to the second processing unit and the third processing unit; the second processing unit is used to optimize the backlight data, and transmit the optimized backlight data to the driver chip to control the backlight display; the third processing unit It is used for obtaining the first image data according to the backlight data and the source video data, and transmitting the first image data to the liquid crystal panel to display the image. Because this application realizes backlight extraction, backlight display and image display based on FPGA, the requirements for SOC, such as selection requirements and processing capacity requirements, can be weakened, and the internal logic of FPGA can be changed according to project requirements, which can more flexibly match the driving of the backlight board. The driving method of the chip.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1a is a schematic diagram of the architecture of a low-partition local backlight adjustment scheme;

FIG. 1b is a schematic diagram of the architecture of a high partition local backlight adjustment scheme;

FIG. 2 is an example diagram of an application scenario provided by an embodiment of the present application;

3a is a schematic structural diagram of an FPGA-based control device provided by an embodiment of the application;

Figure 3b is a schematic diagram of the data flow of the FPGA-based control device shown in Figure 3a;

4 is a schematic structural diagram of an FPGA-based control device provided by another embodiment of the present application;

5 is a schematic structural diagram of an FPGA-based control device provided by another embodiment of the application;

6 is a schematic structural diagram of an FPGA-based control device provided by another embodiment of the present application;

7 is a flowchart of an FPGA-based control method provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first" and "second" in the description, claims and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

It should be understood that the term "and/or" used in this document is only an association relationship to describe the associated objects, indicating that there may be three kinds of relationships, for example, A and/or B, which may indicate that A exists alone, and A and B exist at the same time. B, there are three cases of B alone. "/" means "or" relationship.

The local backlight adjustment uses the backlight composed of LED lamps to replace the cold cathode fluorescent lamp (CCFL) backlight, and adjusts according to the brightness of the image, so that the bright part of the display screen image can reach the maximum, while the dark part can be displayed at the same time. Brightness can be reduced or even turned off for optimal contrast.

Taking LED-backlit TVs as an example, LED-backlit TV partitions can be divided into low partitions and high partitions, with slightly different structures. The low partition mainly refers to the partition within dozens of partitions, and the high partition generally refers to the partition of more than one hundred partitions. At present, the high partition can generally reach more than 300 partitions, which is relatively cost-effective, and the highest supported partition is developing towards more than 10,000 partitions.

The current implementation architecture of local backlight adjustment is as described above, including a low-partition local backlight adjustment scheme (as shown in Figure 1a) and a high-partition local backlight adjustment scheme (as shown in Figure 1b). Among them, the implementation architecture of the local backlight adjustment has at least the following defects:

Referring to Figure 1a, in this low-partition local backlight adjustment scheme, the SOC not only needs to use the local backlight adjustment algorithm to obtain the backlight data, but also needs to drive the driver chip of the backlight board, whose processing capacity cannot support too high partitions, generally in 32 partitions. The advantage is that the cost is low, the disadvantage is that the SOC function is fixed, and the back-end driving method is relatively fixed. If you want to replace the driver chip type of the backlight board, it is very difficult, and you need to customize a new SOC, which is inflexible. In addition, there are too few partitions. , the picture effect that can be improved is relatively small.

Referring to Figure 1b, in this high-partition local backlight adjustment scheme, in order to increase the number of partitions, it is necessary to increase the processing capacity of the SOC, which leads to an increase in the cost of the SOC; and, the SOC model is relatively fixed, and the cost of re-customizing the SOC is high; in addition, the SOC model Too much is difficult to reach a certain order of magnitude to reduce costs. Although the MCU or FPGA handles the work of the driver chip of the backlight panel, which relieves the processing capability requirements of the SOC, the cost increases compared to the direct drive method with low partitions; in addition, the serial peripherals between the SOC and the MCU/FPGA The Serial Peripheral Interface (SPI) communication speed also limits the upper limit of the number of effects and partitions.

To sum up, in the current implementation structure of local backlight adjustment, the SOC function is fixed, and the back-end driving method is relatively fixed. It is very difficult to replace the driver chip type of the backlight board, and a new SOC needs to be remade, which is inflexible, and The cost of re-casting is high, and it is difficult to achieve a certain order of magnitude with too many models to reduce the cost.

Based on the above problems, the present application provides an FPGA-based control device, method and display device, which realizes backlight processing and display processing of source video data based on FPGA, so as to obtain optimized backlight data and output it to a liquid crystal panel for image display Therefore, the problem of insufficient processing power of the SOC can be alleviated, thereby reducing the requirements on the SOC, such as the requirements for selection and processing power, and more flexibly matching the driving mode of the driving chip of the backlight panel.

Next, the application scenarios involved in the present application are illustrated with examples.

FIG. 2 is an example diagram of an application scenario provided by an embodiment of the present application. As shown in FIG. 2 , a user can perform a writing operation on the liquid crystal display 11 of the display device 10 through a stylus (not shown) or a finger, and the touch chip (not shown) in the display device 10 responds to the detection of touch operation on the liquid crystal display screen 11, acquire touch data corresponding to the touch operation, and transmit the touch data to the FPGA-based control device (not shown), and the FPGA-based control device superimposes the touch data and the image data, Finally, the image corresponding to the image data and the track corresponding to the touch data are displayed on the liquid crystal display screen 11 .

As also shown in FIG. 2 , the display device 10 also performs data communication with the server 20 through various communication methods. The display device 10 may be allowed to communicate via local area network (LAN), wireless local area network (WLAN), and other networks. The server 20 may provide various contents and interactions to the display device 10 . The server 20 may be a cluster or multiple clusters, and may include one or more types of servers. Other network service contents such as video-on-demand and advertising services are provided through the server 20 .

The embodiment of the present application does not limit the specific type, size and resolution of the display device 10, and those skilled in the art can understand that the display device 10 can make some changes in performance and configuration as required.

The FPGA-based control device provided by the present application will be explained below with reference to specific embodiments.

FIG. 3a is a schematic structural diagram of an FPGA-based control device provided by an embodiment of the present application. An embodiment of the present application provides an FPGA-based control device, which is applied to a liquid crystal display screen, wherein the liquid crystal display screen includes a liquid crystal panel, a backlight panel, and a driver chip for the backlight panel. Referring to FIG. 3 a , the FPGA-based control device 30 includes: a first processing unit 31 , a second processing unit 32 , a third processing unit 33 and a first communication unit 34 . in:

The first communication unit 34 is electrically connected to the SOC, the first processing unit 31 is electrically connected to the first communication unit 34 , and the second processing unit 32 and the third processing unit 33 are electrically connected to the first processing unit 31 respectively.

The first communication unit 34 is used to obtain source video data from the SOC. The first processing unit 31 is used to extract the backlight data from the source video data, and transmit the backlight data to the second processing unit 32 and the third processing unit 33 respectively. The second processing unit 32 is configured to perform optimization processing on the backlight data, and transmit the optimized backlight data to a driving chip (not shown) to control the backlight display. The third processing unit 33 is configured to obtain first image data according to the backlight data and the source video data, and transmit the first image data to a liquid crystal panel (not shown) to display an image corresponding to the first image data.

For example, the source video data generated by the SOC is sent to the FPGA-based control device 30 through a V-By-One (video by one, VBO for short) VBO, or the SOC sends the source video data from an external video source to the FPGA-based control device 30 through a VBO. The control device 30 of the FPGA. Among them, VBO is a digital interface standard technology for image information transmission. Because this technology can support 4.0Gbps high-speed signal transmission at most, and because of its unique encoding method, it avoids the time delay problem between the data and the clock at the receiving end, so VBO Widely used in the field of ultra-high-definition LCD TVs, making ultra-thin and ultra-narrow TVs possible.

The specific implementation adopted by the first processing unit 31 to extract the backlight data from the source video data is not limited in this embodiment of the present application. For example, the first processing unit 31 extracts the backlight data from the source video data through a preset backlight data extraction algorithm. The preset backlight data extraction algorithm may include, for example, at least one of backlight data extraction algorithms such as mean value method, histogram weighting method, mean value combined with maximum value method, or histogram inverse mapping function. For the specific implementation of each backlight data extraction algorithm, the mean value method is taken as an example to illustrate the following examples:

Assuming 384 partitions (or "backlight partitions") from a 4K display device as an example, the resolution of the display device is 3840*2160. In this case, each partition corresponds to 160*135 pixels. At this time , the mean method is to take the mean of the pixel values of 160*135 pixels as the pixel value of the corresponding partition.

For the specific implementation of the other backlight data extraction algorithms, reference may be made to related technologies, which will not be repeated here.

It is supplemented that the processing effects of different backlight data extraction algorithms for the same source video data are different, or in other words, the processing effects of the same backlight data extraction algorithm for different source video data are different; and, considering the FPGA The internal logic can be changed according to the project requirements, and can support at least one algorithm scheme. Therefore, in practical applications, the corresponding backlight data extraction algorithm can be selected based on the characteristics of the source video data, so that after the FPGA parses each frame of source video data, The optimal algorithm can be selected according to the image content to make the best rendering result.

As shown in Figure 3b, the flow of video data is:

The source video data from the SOC is transmitted to the first communication unit 34, and the first communication unit 34 transmits the source video data to the first processing unit 31; the first processing unit 31 extracts the backlight data from the source video data, and converts the backlight The data is split into two paths:

The first channel of backlight data is transmitted by the first processing unit 31 to the second processing unit 32, and the second processing unit 32 performs optimization processing on the backlight data, and transmits the optimized backlight data to the driver chip to control the backlight display;

The second channel of backlight data is transmitted from the first processing unit 31 to the third processing unit 33. The third processing unit 33 obtains the first image data according to the backlight data and the source video data, and transmits the first image data to the liquid crystal panel to LCD display is performed.

In this embodiment of the present application, the FPGA-based control device includes: a first communication unit electrically connected to the SOC for acquiring source video data from the SOC; a first processing unit electrically connected to the first communication unit for obtaining source video data from the source video data The backlight data is extracted from and transmitted to the second processing unit and the third processing unit respectively; the second processing unit is used to optimize the backlight data, and transmit the optimized backlight data to the driver chip to control the Backlight display; the third processing unit is used to obtain first image data according to the backlight data and the source video data, and transmit the first image data to the liquid crystal panel to display the image. Since this application is based on FPGA to achieve backlight extraction (ie, "extract backlight data from source video data"), backlight display (ie, "transmit optimized processed backlight data to the driver chip to control backlight display") and image display (ie, "Transfer the first image data to the liquid crystal panel to display the image"), which weakens the requirements for SOC, such as selection requirements and processing power requirements, and the internal logic of the FPGA can be changed according to the project requirements, more flexible with the backlight board the driving mode of the driver chip.

On the basis of the above embodiment, as a possible implementation, as shown in FIG. 4 , in the FPGA-based control device 40 , the second processing unit 32 may include a first processing subunit 321 and a first communication subunit 322. The first processing sub-unit 321 is connected between the first processing unit 31 and the first communication sub-unit 322 . The first processing subunit 321 is configured to perform optimization processing on the backlight data by using a preset backlight optimization algorithm to obtain the optimized backlight data. The first communication sub-unit 322 is configured to transmit the optimized backlight data to the driving chip according to the driving mode of the backlight panel. In this embodiment, the preset backlight optimization algorithm may refer to the current backlight optimization algorithm, which will not be repeated here.

Still referring to FIG. 4 , in some embodiments, the third processing unit 33 may include a second processing subunit 331 , a third processing subunit 332 and a second communication subunit 333 . The second processing subunit 331 is electrically connected to the first processing unit 31 , and the third processing subunit 332 is connected between the second processing subunit 331 and the second communication subunit 333 . The second processing subunit 331 is configured to obtain image compensation data according to the backlight data and the preset backlight smoothing algorithm. The third processing subunit 332 is configured to perform fusion processing on the image compensation data and the source video data to obtain the first image data. The second communication sub-unit 333 is used for transmitting the first image data to the liquid crystal panel. In this embodiment, the second processing sub-unit 331 expands the backlight data again into image compensation data equal to the size of the source video data through a preset backlight smoothing algorithm, and the third processing sub-unit 332 uses the image compensation data and the source video data for the image compensation data and the source video data. The data is fused to obtain first image data. Exemplarily, the second processing sub-unit 331 expands the backlight data of the 384 partitions into 4K image compensation data again by using a preset backlight smoothing algorithm, and the third processing sub-unit 332 uses the 4K image compensation data and the 4K source data. The video data is fused to obtain 4K first image data, which is transmitted to the liquid crystal panel for display through the second communication sub-unit 333 and the LCD display interface of the liquid crystal display screen. In addition, for the preset backlight smoothing algorithm, reference may be made to the current backlight smoothing algorithm, which will not be repeated here.

Further, there is still an unsolved problem in the implementation architecture of the local backlight adjustment shown in FIG. 1a and FIG. 1b, that is, the liquid crystal display and the LED backlight control cannot be synchronized. The SOC transmits the image data to the TCON board, and the TCON board transmits the image data to the liquid crystal panel, from the SOC to generate the image A to the liquid crystal panel to display the image A, with a delay of more than 1 frame in the middle; and the SOC converts the image data of the image A. It takes at least 1 frame to generate backlight data, and then it is transmitted to MCU or FPGA for processing. Here, it needs to delay 1 to 2 frames, and then transmit it to the driver chip of the backlight board. The driver chip of the backlight board delays 1 to 2 frames. After the frame is transmitted to the LED light for display, the image A displayed by the LED light will be 2 to 3 frames later than the image A displayed by the liquid crystal display, and the "smearing" phenomenon of the backlight can be seen when playing the image with fast conversion speed. . This is an unsolved problem in the industry. In response to this problem, this application makes the following improvements:

It is assumed that the liquid crystal display screen may further include a touch chip, and the touch chip is used to detect a touch operation on the liquid crystal display screen, and obtain touch data based on the touch operation. Correspondingly, as shown in FIG. 5 , on the basis of the structure shown in FIG. 3 a , the FPGA-based control device 50 may further include: a fourth processing unit 51 and a second communication unit 52 . The second communication unit 52 is electrically connected to the touch chip, and the fourth processing unit 51 is electrically connected between the second communication unit 52 and the third processing unit 33 . The second communication unit 52 is used for acquiring touch data from the touch chip 53 . The fourth processing unit 51 is configured to obtain second image data corresponding to the liquid crystal panel according to the touch data. The third processing unit 33 may also be configured to perform superimposition processing on the first image data and the second image data, and transmit the superimposed data to the liquid crystal panel.

It can be understood that if there is a touch operation acting on the LCD screen, the image data output by the FPGA-based control device is the data after superimposing the first image data and the second image data; if there is no touch operation acting on the LCD screen, The image data output by the FPGA-based control device is the first image data.

In this embodiment, the FPGA-based control device adds integrated processing of touch data, the touch data is sent to the FPGA-based control device through the touch chip, and the FPGA-based control device parses the touch data to obtain a second image corresponding to the liquid crystal panel After the first image data and the second image data are superimposed, the superimposed data is transmitted to the liquid crystal panel, so as to realize the display of the trajectory of the image and the touch operation acting on the liquid crystal display screen.

In one implementation, the fourth processing unit 51 may be specifically configured to: store the touch data in a location corresponding to the storage space of the liquid crystal panel according to the coordinates to obtain the second image data. For example, the fourth processing unit 51 stores the touch data containing the coordinate information into a position in the storage space corresponding to the 4K display image according to the coordinates, to obtain the second image data. In this example, the image size corresponding to the second image data is 4K.

Optionally, the third processing unit 33 may be specifically configured to: perform superimposition processing on the first image data and the second image data based on a preset superimposition ratio, and transmit the superimposed data to the liquid crystal panel. The preset overlay ratio can be selected according to the transparency, and the transparency can be set by the system.

Still referring to FIG. 5 , in some embodiments, the FPGA-based control device 50 may further include: a control unit (not shown). The control unit is used to control the second processing unit 32 and the third processing unit 33 to synchronously send the optimized processed backlight data or the first image data.

Referring to FIG. 6 , in some embodiments, based on the structure shown in FIG. 5 , the FPGA-based control device 60 may further include: a storage unit 61 , the storage unit 61 is electrically connected to the first communication unit 34 and the third processing unit 33 connect. The storage unit 61 may be used to store source video data. Here, the backup of the source video data is realized by the storage unit.

To sum up, the FPGA-based control device provided by this application has at least the following advantages:

1) Use FPGA to realize the functions of backlight extraction, backlight display, touch fusion and LCD display, cancel the existence of TCON board and MCU, and weaken the requirements for SOC, SOC no longer undertakes the work of image processing and touch data fusion. The selection and cost of SOC can be reduced, and the internal logic of FPGA can be changed according to project requirements.

2) Both the backlight data and the image data are generated and sent by the same FPGA hardware and no longer belong to different devices, so the synchronization of the two data is more accurate and can be adjusted flexibly. The FPGA designs the algorithm dynamic transformation function, and selects a more suitable backlight extraction algorithm according to different display images.

3) In the traditional scheme, the backlight data and the source video data are superimposed to form new video data, which are sequentially delayed, buffered, and processed by various algorithms, and finally displayed on the LCD panel. Display, there will be at least 2 frames of screen delay in the middle. In this application, the FPGA superimposes the touch data and the processed image data (such as the second image data described above) and outputs it to the liquid crystal panel (ie, the LCD display) for display, and the delay from generation to display is within 1 frame . This greatly reduces the screen delay when touching and writing, and has the same experience as writing on a book.

4) Partitions can be arbitrarily allocated. FPGA is a parallel processing mechanism, and does not have fixed IO settings like TCON boards or SOCs. It limits output port functions. FPGA can arbitrarily define output port functions. When increasing the partition, the idle IO can be used for the drive partition through configuration, and one board is multi-purpose, and the versatility and flexibility are extremely strong.

The above embodiments explain the structure and functions of the FPGA-based control apparatus provided by the embodiments of the present application. The following are method embodiments of the present application, which may be executed by the FPGA-based control apparatus described in the above apparatus embodiments of the present application. For details not disclosed in the method embodiments of the present application, reference may be made to the above-mentioned device embodiments of the present application.

FIG. 7 is a flowchart of an FPGA-based control method provided by an embodiment of the present application. As shown in Figure 7, the FPGA-based control method includes:

S701. Acquire source video data from the SOC.

S702, extracting backlight data from source video data;

S703, performing optimization processing on the backlight data, and transmitting the optimized backlight data to a driver chip of the backlight panel to control the backlight display;

S704. Obtain first image data according to the backlight data and the source video data, and transmit the first image data to the liquid crystal panel to display an image.

Optionally, optimizing the backlight data may include: using a preset backlight optimization algorithm to optimize the backlight data to obtain optimized backlight data.

Further, obtaining the first image data according to the backlight data and the source video data may include: obtaining image compensation data according to the backlight data and a preset backlight smoothing algorithm; performing fusion processing on the image compensation data and the source video data to obtain the first image data.

In some embodiments, the liquid crystal display screen may further include a touch chip, and the touch chip is configured to detect a touch operation on the liquid crystal display screen, and obtain touch data based on the touch operation. Correspondingly, the control method may further include: acquiring touch data from the touch chip; acquiring second image data corresponding to the liquid crystal panel according to the touch data; superimposing the first image data and the second image data, and Data is transmitted to the LCD panel.

Further, obtaining the second image data corresponding to the liquid crystal panel according to the touch data may include: storing the touch data in a location corresponding to the storage space of the liquid crystal panel according to coordinates to obtain the second image data.

In some embodiments, performing superimposition processing on the first image data and the second image data may include: performing superimposition processing on the first image data and the second image data based on a preset superposition ratio.

Optionally, after acquiring the source video data from the SOC, the method may further include: storing the source video data in a storage unit. Correspondingly, before obtaining the first image data according to the backlight data and the source video data, the method may further include: obtaining the source video data from the storage unit.

The transmission time of the optimized backlight data and the first image data is the same.

FIG. 8 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in FIG. 8 , the display device 80 includes: an SOC 81 , a liquid crystal display screen 82 and an FPGA-based control device 83 . The liquid crystal display screen 82 includes a liquid crystal panel 821 , a backlight panel 822 and a driver chip 823 for the backlight panel 822 . The FPGA-based control device 83 may specifically be the FPGA-based control device described in any of the foregoing embodiments.

For example, the display device 80 may specifically be an electronic device with a display function, such as a liquid crystal television, an interactive whiteboard, a mobile phone or a tablet. Wherein, the interactive tablet integrates any one or more functions of a projector, an electronic whiteboard, a screen, an audio system, a TV, and a video conference terminal.

In some embodiments, the liquid crystal display 82 may further include: a touch chip 824 . The touch chip 824 is used to detect the touch operation on the liquid crystal display screen 82, obtain touch data based on the touch operation, and transmit the touch data to the FPGA-based control device 83, so that the FPGA-based control device 83 generates corresponding touch data according to the touch data. image.

In some embodiments, the display device 80 may further include: a memory 84 for storing source video data. If the FPGA-based control device 83 does not include a storage unit, after acquiring the source video data, the FPGA-based control device 83 can store the source video data in the memory 84, so as to obtain the source video data from the memory 84 in the subsequent video processing process. source video data. The memory 84 may specifically be a double-rate synchronous dynamic random access memory (Double Data Rate Synchronous Dynamic Random Access Memory, DDR SDRAM or DDR for short). In this embodiment, the hardware combination of the FPGA-based control device 83 and the memory 84 replaces the current TCON board or the hardware architecture of the TCON board and the FPGA/MCU.

In addition, the memory 84 can also be used to store computer programs, including computer programs corresponding to the FPGA-based control method. The memory 84 may include a stored program area and a stored data area. The storage program area may store an operating system, an application program required for at least one function, and the like. The storage data area may store data (such as audio and video data, etc.) created during the use of the display device 80 and the like.

The display device in this embodiment can be used to implement the technical solutions in the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium; when the computer program is executed, the solution provided by any of the foregoing method embodiments is implemented.

Embodiments of the present application also provide a computer program product, where the computer program product includes: a computer program. The computer program may be stored in a readable storage medium, and at least one processor of the display device may read the computer program from the readable storage medium, and the at least one processor executes the computer program to cause the display device to execute the solution provided by any of the above method embodiments.

In the above-mentioned embodiments, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.

In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist physically alone, or two or more modules may be integrated in one unit. The units formed by the above modules can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional units.

The above-mentioned integrated modules implemented in the form of software functional modules may be stored in a computer-readable storage medium. The above-mentioned software function modules are stored in a storage medium, and include several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute the methods described in the various embodiments of the present application. some steps.

The above-mentioned storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Except programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic memory, flash memory, magnetic or optical disks, etc. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by hardware related to computer programs. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps including the above method embodiments are executed; and the foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims (11)

1. a control device based on FPGA, is applied to liquid crystal display screen, and described liquid crystal display screen comprises the driver chip of liquid crystal panel, backlight plate and described backlight plate, it is characterized in that, described control device based on FPGA comprises: a processing unit, a second processing unit, a third processing unit and a first communication unit; The first communication unit is electrically connected to the system-on-chip SOC, the first processing unit is electrically connected to the first communication unit, and the second processing unit and the third processing unit are respectively connected to the first processing unit unit electrical connection; the first communication unit for acquiring source video data from the SOC; the first processing unit, configured to extract backlight data from the source video data, and transmit the backlight data to the second processing unit and the third processing unit respectively; the second processing unit, configured to perform optimization processing on the backlight data, and transmit the optimized backlight data to the driving chip to control the backlight display; The third processing unit is configured to obtain first image data according to the backlight data and the source video data, and transmit the first image data to the liquid crystal panel to display an image. 2. The FPGA-based control device according to claim 1, wherein the second processing unit comprises a first processing subunit and a first communication subunit; the first processing subunit is connected between the first processing unit and the first communication subunit; The first processing subunit is configured to perform optimization processing on the backlight data by using a preset backlight optimization algorithm to obtain optimized backlight data; The first communication sub-unit is configured to transmit the optimized backlight data to the driving chip according to the driving mode of the backlight panel. 3. The FPGA-based control device according to claim 1, wherein the third processing unit comprises a second processing subunit, a third processing subunit and a second communication subunit; The second processing subunit is electrically connected to the first processing unit, and the third processing subunit is connected between the second processing subunit and the second communication subunit; the second processing subunit, configured to obtain image compensation data according to the backlight data and a preset backlight smoothing algorithm; the third processing subunit, configured to perform fusion processing on the image compensation data and the source video data to obtain the first image data; The second communication subunit is used for transmitting the first image data to the liquid crystal panel. 4. The FPGA-based control device according to any one of claims 1 to 3, wherein the liquid crystal display further comprises a touch chip, and the touch chip is used to detect a touch operation on the liquid crystal display , and obtain touch data based on the touch operation, the FPGA-based control device further includes: a fourth processing unit and a second communication unit; the second communication unit is electrically connected to the touch chip, and the fourth processing unit is electrically connected between the second communication unit and the third processing unit; the second communication unit, configured to acquire the touch data from the touch chip; the fourth processing unit, configured to obtain second image data corresponding to the liquid crystal panel according to the touch data; The third processing unit is further configured to perform superimposition processing on the first image data and the second image data, and transmit the superimposed data to the liquid crystal panel. 5. The FPGA-based control device according to claim 4, wherein the fourth processing unit is specifically used for: The touch data is stored in a location corresponding to the storage space of the liquid crystal panel according to the coordinates to obtain the second image data. 6. The FPGA-based control device according to claim 4, wherein the third processing unit is specifically used for: Based on a preset superimposition ratio, superimposing processing is performed on the first image data and the second image data, and the superimposed data is transmitted to the liquid crystal panel. 7. The FPGA-based control device according to any one of claims 1 to 3, wherein the FPGA-based control device further comprises: a storage unit; the storage unit is electrically connected to the first communication unit and the third processing unit; The storage unit is used to store the source video data. 8. The FPGA-based control device according to any one of claims 1 to 3, wherein the FPGA-based control device further comprises: a control unit; The control unit is configured to control the second processing unit and the third processing unit to send the optimized backlight data or the first image data synchronously. 9. A display device, comprising: a system-on-chip SOC, a liquid crystal display screen, and the FPGA-based control device according to any one of claims 1 to 8, wherein the liquid crystal display screen comprises a liquid crystal panel, A backlight panel and a driver chip of the backlight panel. 10. The display device according to claim 9, further comprising: a memory electrically connected to the first communication unit and the third processing unit for storing the source video data. 11. The display device according to claim 9 or 10, wherein the liquid crystal display screen further comprises: a touch chip for detecting a touch operation on the liquid crystal display screen, and obtaining touch data based on the touch operation and transmitting the touch data to the FPGA-based control device, so that the FPGA-based control device generates a corresponding image according to the touch data.

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