TWI796765B - Display control method, display control circuit, and display device - Google Patents

Abstract

The present disclosure provides a display control method including: receiving the first image data, compressing the first image data, and storing the first compressed image data; receiving the second image data; acquiring and storing correlated data between the first image data and the second image data; compressing the second image data according to the correlated data; decompressing the first image data and the second image data according to the correlated data to display one frame of image. The present disclosure also provides a display control circuit and a display device.

Description

Display control method, display control circuit and display device

The present application relates to the field of display technology, and in particular to a display control method, a display control circuit applying the display control method, and a display device including the display control circuit.

A conventional display device includes a storage device for storing compressed image data. The display device is used for decompressing the image data in the storage device to display images. A traditional method for compressing image data is the predictive coding compression method. The predictive coding compression method is beneficial to obtain higher compression rate and better compression effect.

The image displayed by the display device is updated as time changes. In some cases, the entire image displayed by the display device needs to be updated. In other cases, only part of the content of the image displayed by the display device needs to be updated.

Since the display device compresses image data using a predictive coding compression method, when only part of the content of the image displayed by the display device needs to be updated, the compressed image data stored in the storage device cannot be decoded smoothly.

The first aspect of the present application provides a display control method, including: receiving first image data, compressing and storing the first image data; receiving second image data; acquiring the first image data and the first image data Correlation data between the two image data and stored; compressing the second image data according to the correlation data; decompressing the first image data and the second image according to the correlation data data to display a frame of image.

The second aspect of the present application provides a display control circuit, including: a compression module for receiving and compressing the first image data and the second image data; The first storage module is electrically connected to the compression module and is used to store the compressed first image data and the compressed second image data; the correlation data acquisition module is used to receive the compressed first image data and the compressed second image data; the second image data, and obtain the correlation data between the first image data and the second image data; the second storage module is electrically connected to the correlation data acquisition module, and is used to store the correlation data said correlation data; a decompression module, electrically connected to said first storage module and said second storage module, for reading said correlation data, and according to said correlation data, compressing The first image data and the compressed second image data are decompressed and output, and the decompressed first image data and the decompressed second image data are used to display a frame image.

The third party of this application provides a display device, including an electrically connected display panel and a display control circuit, the display control circuit is as above, and the display control circuit is used to output the decompressed first image data and decompressed The second image data after decompression, the display panel is used to display a frame of image according to the decompressed first image data and the decompressed second image data.

The above display control method, display control circuit and display device compress the first image data and the second image data, and when receiving the second image data, first obtain the first image data and the second image data The correlation data between them are stored, so that the first image data and the second image data can be successfully decompressed, and the displayed image can be partially updated.

100: display device

10: Display control circuit

11: Compression module

12: The first storage module

13: Correlation data acquisition module

14:Second storage module

15: Decompression module

16: Location information acquisition module

17: Compression control module

20: Display panel

21: Display area

211: the first sub-display area

212: the second sub-display area

30: Image

A1, A2, B1, B2, B3, B4, C1, C2, C3, C4: associated area

S1, S2, S3, S4, S5, S6, S7, S8: steps

FIG. 1 is a schematic diagram of a module structure of a display device according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a module showing a control circuit in FIG. 1 .

FIG. 3 is a flowchart of a display control method according to an embodiment of the present application.

FIG. 4 is a schematic plan view of the structure of the display panel in FIG. 1 at a first period of time.

FIG. 5 is a schematic plan view of the planar structure of the display panel in FIG. 1 in a second period of time.

FIG. 6 is another flow chart of the display control method according to the embodiment of the present application.

FIG. 7 is a schematic plan view of a display panel in a modified embodiment.

FIG. 8 is a schematic plan view of a display panel in another modified embodiment.

In each embodiment of the present invention, in order to facilitate the description and not limit the present invention, the term "connection" used in the patent application specification and claims of the present invention is not limited to physical or mechanical connection, no matter it is direct or indirect of. "Up", "Down", "Down", "Left", "Right" and so on are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship also changes accordingly.

Please refer to FIG. 1 , the display device 100 of this embodiment is used for displaying images. The display device 100 can be a device capable of displaying images such as a smart phone, a computer, and a television.

The display device 100 includes a display control circuit 10 and a display panel 20 electrically connected to each other. The display panel 20 is used for displaying images according to the signal output by the display control circuit 10 . The display control circuit 10 may include at least one chip, and may also include circuit function units on the motherboard of the display device 100 . The display panel 20 can be a liquid crystal display panel, an organic light emitting display panel, or a micro light emitting diode display panel.

Please refer to FIG. 2 , the display control circuit 10 includes a compression module 11 , a first storage module 12 , a correlation data acquisition module 13 , a second storage module 14 and a decompression module 15 .

The compression module 11 is used for receiving and compressing the first image data and the second image data. The first storage module 12 is electrically connected to the compression module 11 for storing the compressed first image data and the compressed second image data. The correlation data obtaining module 13 is used for receiving the second image data, and obtaining the correlation data between the first image data and the second image data. The second storage module 14 is electrically connected to the correlation data acquisition module 13 for storing the correlation data. The decompression module 15 is electrically connected to the first storage module 12 and the second storage module 14, and is used to read the correlation data in the second storage module 14, and according to the correlation data to compress the first image The image data and the compressed second image data are decompressed and then output. The decompressed first image data and the decompressed second image data are used to display a frame of image.

In this embodiment, the display control circuit 10 further includes a location information acquisition module 16 and a compression control module 17 . The location information obtaining module 16 is used to obtain the location information of the second image data. The compression control module 17 is electrically connected to the location information acquisition module 16 and the correlation data acquisition module 13 respectively, and is used for determining whether to compress the second image data according to the location information of the second image data. If the compression control module 17 judges yes, it is used to control the correlation data acquisition module 13 to obtain the correlation data between the first image data and the second image data, and control the compression module 11 to compress the second image. like data. If the judgment of the compression control module 17 is no, the compression control module 17 controls the correlation data acquisition module 13 not to obtain the correlation data, And the compression module 11 is controlled not to compress the second image data, and the display panel 20 only displays images according to the decompressed first image data.

The above-mentioned compression module 11, first storage module 12, correlation data acquisition module 13, second storage module 14, decompression module 15, location information acquisition module 16 and compression control module 17 can be chip , a functional unit in the chip or a circuit functional unit on the motherboard of the display device 100 .

The present application also provides a display control method applied to the above-mentioned display device 100 . In this embodiment, the display control method is applied to the display control circuit 10 in the display device 100 .

Please refer to FIG. 3, the display control method of this embodiment includes: step S1, receiving the first image data, compressing and storing the first image data; step S2, receiving the second image data; step S3, obtaining the and store the correlation data between the first image data and the second image data; step S4, compress the second image data according to the correlation data; step S5, compress the second image data according to the correlation data; Decompressing the first image data and the second image data to display a frame of image.

Please refer to FIG. 2 and FIG. 3 together, the display device 100 executes step S1 in a first period. In step S1, the compression module 11 receives the first image data and compresses the first image data. The first storage module 12 is used for receiving and storing the compressed first image data. The compressed first image data is decompressed by the decompression module 15 and can be used for displaying a frame of image on the display panel 20 .

In the display device 100, the first storage module 12 for storing image data is a random access memory (Random Access Memory, RAM). The cost of the first storage module 12 increases as the storage space increases. Therefore, by reducing the storage space of the first storage module 12 , it is beneficial to reduce the cost of the first storage module 12 . In order to reduce the storage space of the first storage module 12 , the first image data is compressed by the compression module 11 and then stored by the first storage module 12 . Therefore, in this embodiment, the first image data is compressed, stored, and decompressed by the compression module 11, the first storage module 12, and the decompression module 15, which is beneficial to reduce the storage capacity of the first storage module 12. space, thereby reducing the cost of the first storage module 12 .

In this embodiment, a predictive coding compression method is used to compress the first image data, which is beneficial to improve the compression ratio.

During the first period, the display panel 20 is used to display a frame of image according to the decompressed first image data.

The display device 100 executes step S2 in the second period. In step S2, the display control circuit 10 receives the second image data. The second image data is not a complete frame of image data, and the display panel 20 is used to partially update a frame of image displayed in the first time period according to the second image data.

Please refer to FIG. 4 , the display panel 20 has a display area 21 . The display area 21 is used to emit light to display images. During the first period, the display area 21 displays a complete frame of the image 30 . In this embodiment, the image to be displayed on the display area 21 in the second time period is only partially different from the image 30 displayed in the first time period, so only part of the image 30 displayed in the first time period needs to be updated.

Referring to FIG. 5 , the display area 21 includes a first sub-display area 211 and two second sub-display areas 212 that are joined together. In this embodiment, the display area 21 , the first sub-display area 211 and the second sub-display area 212 are all rectangular. The first sub-display area 211 is located between the two second sub-display areas 212 . The two long sides of the first sub-display area 211 are respectively connected to the long sides of the two second sub-display areas 212 to form the display area 21 .

During the second period, the image displayed on the display panel 20 is composed of the image displayed on the first sub-display area 211 and the images displayed on the two second sub-display areas 212 . The two second sub-display areas 212 display the same image during the first time period and the second time period, while the first sub-display area 211 displays different images during the first time period and the second time period. Therefore, in this embodiment, the image data corresponding to the first sub-display area 211 can be updated in the second time period. That is, in this embodiment, the second image data is the image data corresponding to the first sub-display area 211 , and the first sub-display area 211 is used to display images according to the second image data during the second period. The two second sub-display areas 212 display the same image in the second time period as in the first time period.

In this embodiment, the first image data is compressed using a predictive coding compression method, and there is a certain correlation between the compressed first image data corresponding to adjacent pixels in the display area 21 . The decompression module 15 can correctly decompress the first image data by utilizing the correlation.

In the second period, since only part of the image needs to be updated, only a part of the compressed first image data stored in the first storage module 12 needs to be updated. The updated image data stored in the first storage module 12 is defined as the target image data, and the target image data includes compressed second image data and compressed part of the first image data. That is, in the second period, part of the compressed first image data is replaced by the compressed second image data.

However, the correlation between the second image data received in the second time period and the first image data received in the first time period is unknown, in this case, the decompression module 15 cannot simultaneously The compressed part of the first image data and the compressed second image data are decompressed to display images.

Therefore, in this embodiment, the correlation data between the first image data and the second image data is obtained at step S3, the second image data is compressed according to the correlation data at step S4, and the Correlation data between the first image data and the second image data Decompress the compressed part of the first image data and the compressed second image data, so that the display panel can display correctly in the second time period A frame of image.

In this embodiment, the display control method further screens the second image data, instead of compressing all the received second image data. Therefore, in this embodiment, please refer to FIG. 6 , after step S2, the display control method further includes: step S6, obtaining the position information and size information of the second image data; step S7, according to the second image data Determine whether to compress the second image data based on the location information and size information.

In step S6, the location information acquisition module 16 is used to calculate the location information and size information of the second image data. The position information of the second image data includes the position of the first sub-display area 211 corresponding to the second image data in the entire display area 21, and the size information of the second image data includes the position corresponding to the second image data. The first sub-display area 211 occupies the area of the entire display area 21 .

Please refer to FIG. 5 again. When the compression control module 17 judges that the area, length and width of the first sub-display area 211 corresponding to the second image data are smaller than the display area 21, it is considered that the second image data can be successfully displayed as image, then the compression control module 17 judges as yes at this time. Otherwise, the compression control module 17 judges as NO.

When the compression control module 17 judges yes in step S7, step S3, step S4 and step S5 are executed. That is to say, the compression control module 17 controls the correlation data acquisition module 13 to obtain the correlation data between the first image data and the second image data, controls the second storage module 14 to store the correlation data, and controls the compression module Group 11 compresses the second image data according to the correlation data, and controls the decompression module 15 to decompress the target image data (including the compressed part of the first image data and the compressed first image data) according to the correlation data. 2 image data).

In this embodiment, step S3 specifically includes: Step S31, if the judgment in step S7 is yes, determine the associated area between the first image data and the second image data; and step S32, obtain the first image data and the associated area according to the associated area and storing the correlation data between the second image data.

The location information acquisition module 16 is electrically connected to the compression module 11 . After the location information acquisition module 16 calculates the location information and size information of the second image data, the compression module 11 judges and determines the first image data and the second image according to the location information and size information in step S31. The associated area of the data. The correlation data acquisition module 13 is electrically connected to the compression module 11, and is used for the correlation data between the first image data and the second image data acquired according to the associated area in step S32.

In this embodiment, the associated area of the first image data and the second image data is the associated area of the first sub-display area 211 and the second sub-display area 212 . In this embodiment, the first sub-display area 211 and the second sub-display area 212 have associated areas A1 and A2. The display area 21 includes a plurality of pixels arranged in multiple rows and multiple columns. The associated areas A1 and A2 are the two rows closest to the boundary line between the first sub-display area 211 and the second sub-display area 212 in the display area 21 .

In a modified embodiment, the positional relationship between the first sub-display area 211 and the second sub-display area 212 is shown in FIG. 7 . In this modified embodiment, the display area 21 includes a first sub-display area 211 and a second sub-display area 212 that are joined together. The display area 21 , the first sub-display area 211 and the second sub-display area 212 are all rectangular, and the second sub-display area 212 surrounds the first sub-display area 211 . In this modified embodiment, there are associated areas B1 , B2 , B3 and B4 between the first sub-display area 211 and the second sub-display area 212 .

In another modified embodiment, the positional relationship between the first sub-display area 211 and the second sub-display area 212 is shown in FIG. 8 . In another modified embodiment, the display area 21 includes two first sub-display areas 211 and a second sub-display area 212 that are joined together. The display area 21 , the first sub-display area 211 and the second sub-display area 212 are all rectangular. The long sides or short sides of the two first sub-display areas 211 are connected, and the second sub-display area 212 surrounds the two first sub-display areas 211 . In another modified embodiment, there are associated regions C1, C2, C3 and C4 between the first sub-display area 211 and the second sub-display area 212 .

In this embodiment, step S5 specifically includes: updating the compressed first image data according to the compressed second image data to generate target image data, and the target image data includes compressed said second image data and a compressed portion of said first image data; Based on the correlation data, the target image data is decoded to display the one frame of image.

Please refer to FIG. 5 again. As mentioned above, the difference between the image displayed by the display panel 20 in the second period and the image displayed in the first period lies in the image displayed in the first sub-display area 211, so in the second period by The compressed second image data replaces the portion of the compressed first image data corresponding to the first sub-display area 211 . The "partially compressed first image data" is the compressed first image data corresponding to the two second sub-display areas 212 .

The decompression module 15 is used to decode the target image data corresponding to each pixel in the display area 21 in order from top to bottom and from left to right (based on FIG. 5 ). When decoding to the associated areas A1 and A2, the correlation data between the first image data and the second image data stored in the second storage module 14 can be read, and the images corresponding to the associated areas A1 and A2 can be correctly decoded. Target image data.

When the judgment in step S7 is negative, step S8 is executed. That is, the decompression module 15 still decompresses the compressed first image data stored in the first period in the second period, and the display panel 20 still displays a frame image. That is, the display panel 20 displays the same image during the first period and the second period.

The display control method of this embodiment compresses the first image data and the second image data according to the encoding predictive compression method. When receiving the second image data for updating a part of the image, the correlation data between the first image data and the second image data is first obtained and stored, so that the target image data (including The compressed part of the first image data and the compressed second image data) realize partial updating of the displayed image.

The above display control method is applied to the display control circuit 10 and the display device 100, and the display control circuit 10 and the display device 100 can achieve all the beneficial effects as above.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Alterations and variations all fall within the scope of the claimed invention.

S1, S2, S3, S4, S5: steps

Claims (8)

A display control method, the improvement of which includes: receiving first image data, compressing and storing the first image data; receiving second image data; obtaining position information and size information of the second image data ; Judging whether to compress the second image data according to the position information and size information of the second image data; and store the correlation data; compress the second image data according to the correlation data; decompress the first image data and the second image data according to the correlation data to display a frame image. The display control method according to claim 1, wherein if the determination is negative, decompress the first image data to display the one frame of image. The display control method according to claim 1, wherein if the judgment is yes, the step of obtaining and storing the correlation data between the first image data and the second image data, specifically includes : if it is judged as yes, determine the associated area between the first image data and the second image data; obtain the relationship between the first image data and the second image data according to the associated area Correlation data and save. The display control method according to any one of claims 1-3, wherein the first image data and the second image data are compressed in a predictive coding compression manner. The display control method according to any one of claim items 1-3, wherein the first image data and the second image data are decompressed according to the correlation data to display a frame of image The step specifically includes: updating the compressed first image data according to the compressed second image data to generate target image data, and the target image data includes the compressed second image data image data and the compressed first image data; based on the correlation data, decoding the target image data to display the one frame of image. A display control circuit, the improvement of which includes: a compression module, used to receive and compress the first image data and the second image data; a first storage module, electrically connected to the compression module, used to store the compressed The first image data after compression and the second image data after compression; the position information acquisition module, used to acquire the position information and size information of the second image data; the correlation data acquisition module , used to receive the second image data, and obtain the correlation data between the first image data and the second image data; the compression control module is electrically connected to the position information acquisition module and the The correlation data acquisition module is used to judge whether to compress the second image data according to the position information and size information of the second image data, and if it is judged to be yes, then control the correlation data acquisition module The second storage module is electrically connected to the correlation data acquisition module for storing the correlation data; the decompression module is electrically connected to the first storage module and the The second storage module is used to read the correlation data, and decompress the compressed first image data and the compressed second image data according to the correlation data After outputting, the decompressed first image data and the decompressed second image data are used to display a frame of image. The display control circuit according to claim 6, wherein the first storage module is specifically configured to update the compressed first image data according to the compressed second image data to generate a target image image data, the target image data includes the compressed second image data and compressed part of the first image data; the decompression module is specifically used for: based on the correlation data, Decoding the target image data to display the one frame of image. A display device, which is improved in that it includes an electrically connected display panel and a display control circuit, the display control circuit is as described in any one of claim items 6-7, and the display control circuit is used to output the decompressed The first image data and the decompressed second image data, the display panel is used to display a frame image according to the decompressed first image data and the decompressed second image data picture.

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