CN105139792B - Display methods and display device - Google Patents

Abstract

The invention belongs to the field of display technology, and in particular relates to a display method and a display device. The display method includes the steps of: S1) obtaining the frame layout information of the frame image, dividing the frame image into multiple image areas, and recording the area shape and area size of each of the image areas; S2) obtaining the display device support the number of display resolution levels, and set different picture resolutions for each of the picture areas according to the different display content types and the display resolution levels of the picture areas; S3) according to the corresponding Screen resolution, prepare data to be displayed; S4) prepare drive data according to the data to be displayed, drive the physical pixels in the display area corresponding to each of the screen areas in the display screen, and display the entire frame of the frame picture . The display method has a small calculation amount of display data and does not reduce the display accuracy, which is simple and effective; the display device consumes less power and is more durable.

Description

Display method and display device

technical field

The invention belongs to the field of display technology, and in particular relates to a display method and a display device.

Background technique

Since the release of the retina display standard of iphone4, people's requirements for display screen resolution have been increasing day by day. Especially mobile display devices, such as smart phones, have begun to popularize 1080P, and have begun to transition to 2k resolution. An important factor affecting the popularization of high-resolution display technology is the battery short board of mobile devices. Higher resolution means greater graphics system (including CPU, graphics card and its memory) processing pressure, greater data transmission bandwidth, and higher power consumption. On the one hand, people are increasingly picky about higher display resolutions, and on the other hand, they complain more and more about the increasing energy consumption of displays.

In the existing display methods, after the graphics system obtains the information to be displayed, it usually prepares the pixel point information of each display content for the driving circuit according to a fixed resolution, that is, the actual display content of each display area is not distinguished, and static pictures Both class and text class prepare pixel information according to the same pixel density, which has the disadvantages of large data volume and power consumption. Such disadvantages can be verified from Meizu MX4pro: MX4pro uses a 2560*1536 resolution display screen. In order to support the highest pixel display effect, especially in the case of a large number of pictures and videos, the graphics system of MX4Pro bears huge display data. The amount of calculation, so in the early days of the release, it was criticized for the large power consumption of the system. But when the user modifies the system configuration file so that the graphics system only calculates the data of 1920*1152, although the system lag and power consumption are improved to a certain extent, the advantages of the ultra-high resolution are useless.

In the current display scheme, what the graphics system transmits to the driving circuit is the display information of each pixel, and at the same time, it is necessary to transmit the data of each pixel to the driving circuit according to the number of physical pixels of the display screen. Existing solutions either meet the requirement of high resolution, so that the graphics system must consume more power; or save power and reduce the requirement of resolution. In addition, capable people from all walks of life are also studying different solutions to reduce the amount of data transmission to reduce power consumption, including:

A display self-refresh scheme with RAM, when the image itself is still for a long time, it reduces the frequency of the graphics system providing data to the driver IC of the display, and the graphics system does not need to frequently trigger the driver IC of the display to maintain the state of the liquid crystal molecules , to achieve the purpose of reducing the power consumption of the graphics system. For example, on a standard 1080P LCD screen, if the refresh rate is 60Hz, if the displayed content does not change within 1s, theoretically, the graphics system still needs to drive the driver IC of the display screen 60 times at most within 1s to maintain the current Display content. After adopting the self-refresh scheme, ideally, the graphics system does not need to drive the driver IC of the display screen within 1s, but maintains the display content through the driver IC itself. The advantage of this method is to save power consumption by reducing the operating frequency of the graphics system, but at this time the calculation amount of the graphics system for each frame is still constant, that is, it needs to calculate data for 1920*1080 pixels. In scenarios where the display screen changes rapidly, such as video and game status, the improvement effect of this method is not obvious.

A pure software solution to reduce the data volume of the graphics system: for example, the Meizu MX4Pro with 2k resolution mentioned above, by modifying the device information file of the operating system, the graphics system mistakenly thinks that the display screen is 1080P or even lower resolution, thereby When calculating the data, reduce the overall calculation amount (for example, only calculate the 1080P pixel display information), and then use the overall software interpolation method to generate the 2k pixel display information required by the display screen from the 1080P pixel display information, and pass it to the driver IC for use show. The advantage of this method is that it is simple to implement, can greatly reduce the data calculation amount of the graphics system and CPU, improve the responsiveness of the mobile display device and reduce power consumption; the disadvantage is that the power saving is very limited, and the overall software interpolation method will reduce The sharpness of the actual display; at the same time, this is a static solution, and the operating system and hardware system need to be restarted for each change, which is not convenient enough.

It can be seen that it is an urgent technical problem to design a simple and effective display method and a corresponding display device with a small amount of data calculation and without reducing the display effect.

Contents of the invention

The technical problem to be solved by the present invention is to provide a display method and a display device for the above-mentioned deficiencies in the prior art. Less consumption, more durable.

The technical solution adopted to solve the technical problem of the present invention is the display method, comprising steps:

S1) Acquire the picture layout information of the frame picture, divide the frame picture into multiple picture areas, and record the area shape and area size of each of the picture areas;

S2) Obtain the number of display resolution levels supported by the display device, and set different picture resolutions for each of the picture areas according to different display content types and the display resolution levels of the picture areas;

S3) Prepare data to be displayed according to the picture resolution corresponding to the picture area;

S4) Prepare driving data according to the data to be displayed, drive physical pixels in the display area corresponding to each of the picture areas in the display screen, and display the entire frame of the frame picture.

Preferably, in S2), the display content types include text, static pictures, dynamic video, and backgrounds other than the above-mentioned areas, and different display content types are classified according to the text, the The order of the static picture category, the dynamic video category, and the background category is that the picture resolutions decrease sequentially.

Preferably, S3) includes:

S31) Determine the picture resolution and corresponding picture parameters corresponding to each of the picture areas according to the display content type;

S32) Perform corresponding data processing according to the screen parameters corresponding to the display content type, so as to prepare corresponding data to be displayed.

Further preferably, in S31), according to the display content type, there are:

The picture parameters of the text category include the shape, size, color and resolution of the text symbols in the corresponding picture area;

The picture parameters of the background class include the shape, size, position and color of the corresponding picture area;

The picture parameters of the static picture category and the dynamic video category include the shape, size, position and pixel display information of the corresponding picture area.

Preferably, in S32), according to the picture parameters corresponding to the display content type, there are:

The data processing of the display content of the text class includes: querying the memory with pre-stored text codes for the shape, size, color and resolution of the text symbols corresponding to the display content of the text class, and converting them into corresponding text Encoded pixels display information and cache it;

The data processing of the display content of the static picture category includes: sampling the display content of the static picture category according to the input-output ratio of the current display resolution/first resolution to form pixel display information and caching;

The data processing of the display content of the dynamic video category includes: sampling the display content of the dynamic video category according to the input-output ratio of the current display resolution/second resolution to form pixel display information and buffering;

The display content data processing of the background class includes: sampling the shape, size and color of the display content of the background class according to the input-output ratio of the current display resolution/third resolution to form pixel display information and performing cache.

Preferably, for the screen area having more than one type of display content overlappingly displayed, according to the relatively largest screen resolution among the screen resolutions of the display content types contained in the screen area Perform data processing.

Preferably, in S4), the display content of the text class is displayed at full resolution, and the pixel display information of the text code is the text drive data corresponding to the current display resolution of the display screen, so The character drive data drives the corresponding physical pixels point-to-point in the display area corresponding to the screen area of the text through the drive circuit of the display screen;

Displaying the display content of the static picture class at a first resolution, the pixel display information of the display content of the static picture class is formed by interpolation according to the input-output ratio of the first resolution/current display resolution Static picture driving data, the static picture driving data is transmitted to the register, and then drives the corresponding physical pixels to the display area corresponding to the picture area of the static picture type through the driving circuit of the display screen;

Displaying the display content of the dynamic video class at a second resolution, the pixel display information of the display content of the dynamic video class is interpolated according to the input-output ratio of the second resolution/current display resolution Dynamic video driving data, the dynamic video driving data is transmitted to the register, and then drives the corresponding physical pixels to the display area corresponding to the picture area of the dynamic video type through the driving circuit of the display screen point;

The display content of the background class is displayed at a third resolution, and the pixel display information of the display content of the background class is interpolated according to the input-output ratio of the third resolution/current display resolution to form a background drive Data, the background driving data is transmitted to the register, and then through the driving circuit of the display screen, the corresponding physical pixels are driven to the display area corresponding to the background type of the screen area.

Preferably, the picture resolution of the text class is full resolution, and the full resolution is 1080P; the picture resolution of the static picture class is the first resolution, and the first resolution is 720P; The picture resolution of the dynamic video category is the second resolution, and the second resolution is 480P; the picture resolution of the background category is the third resolution, and the third resolution is 320P.

A display device, including a graphics system, a driving circuit, and a display screen, the display screen includes a plurality of physical pixels arranged in a matrix, and also includes a frame image processing system, wherein:

The graphics system, connected to the frame image processing system, is used to receive and transmit frame display data to the frame image processing system;

The frame image processing system is also connected to the driving circuit, and is used for different display content types and display resolution levels of the picture areas, and different picture resolutions are set for each of the picture areas; and according to the picture area corresponding the screen resolution, prepare the data to be displayed and the corresponding driving data;

The driving circuit, connected to the display screen, is used to receive the driving data of the frame image processing system, and drive the physical pixels in the display area of the display screen corresponding to each of the picture areas;

The display screen is driven by the drive circuit to display the entire frame of the frame picture.

Preferably, the frame image processing system includes a picture information acquisition module, a classification module and a processing module, wherein:

The information acquisition module is configured to acquire the picture layout information of the frame picture;

The classification module is configured to divide the frame picture into a plurality of picture areas with different picture resolutions according to the picture layout information, and record the area shape and area size of each of the picture areas;

The processing module is configured to prepare the data to be displayed and corresponding driving data according to the screen resolution corresponding to the screen area, and the driving data is used to drive the corresponding physical display in the display screen. pixel.

Preferably, in the classification module, according to the number of display resolution levels supported by the display device, and according to the display resolution levels, the different picture resolutions of each of the picture areas in the frame pictures Divided into different display content types, the display content types include text, static pictures, dynamic video, and backgrounds other than the above-mentioned areas, and different display content types are classified according to the text, the static The picture resolutions decrease in order of the pictures, the dynamic videos, and the backgrounds.

Preferably, the processing module includes a query unit, a sampling unit and an interpolation unit, wherein:

The query unit is configured to determine the picture resolution and corresponding picture parameters corresponding to each of the picture areas according to the display content type;

The sampling unit is configured to perform corresponding data processing according to the screen parameters corresponding to the display content type, so as to prepare the corresponding data to be displayed;

The interpolation unit is configured to provide driving data corresponding to the current display resolution of the display screen according to the data to be displayed, so as to drive the corresponding physical pixels in the display screen.

Preferably, according to the picture parameters corresponding to the display content type, the sampling unit includes a text data processor, a background data processor, a static picture data processor and a dynamic video data processor, wherein:

The character data processor is used to inquire the shape, size, color and resolution of the character symbol corresponding to the display content of the character class from the memory with the character code pre-stored, and convert it into a pixel display of the corresponding character code information and cache it;

The static picture data processor is used to sample the display content of the static picture according to the input-output ratio of the current display resolution/first resolution to form pixel display information and cache it;

The dynamic video data processor is configured to sample the display content of the dynamic video according to the input-output ratio of the current display resolution/second resolution to form pixel display information and cache it;

The background class data processor is used to sample the shape, size and color of the display content of the background class according to the input-output ratio of the current display resolution/third resolution to form pixel display information and cache it.

Preferably, for the text-based display content displayed at full resolution, the pixel display information encoded by text is text-driven data corresponding to the current display resolution of the display screen, and the text-driven data is passed through The driving circuit of the display screen drives the corresponding physical pixels point-to-point in the display area corresponding to the screen area of the text;

For the static picture display content displayed at the first resolution, the interpolation unit receives the pixel display information of the static picture display content, and calculates the input and output ratio according to the first resolution/full resolution interpolation to form static picture driving data, the static picture driving data is transmitted to the register, and the driving circuit for driving the display screen drives the corresponding physical pixels to the display area corresponding to the picture area of the static picture class ;

For the dynamic video display content displayed at the second resolution, the drive circuit provides the pixel display information in the dynamic video display to the interpolation unit, and the interpolation unit uses the second resolution The input-output ratio interpolation of full resolution forms dynamic video drive data, and the dynamic video slice drive data is used to drive the drive circuit of the display screen to drive the corresponding display area corresponding to the picture area of the dynamic video class. The physical pixels;

For the background-type display content displayed at the third resolution, the pixel display information of the background-type display content is interpolated according to the input-output ratio of the third resolution/current display resolution to form background driving data The background driving data is transmitted to the register, and then the corresponding physical pixels are driven to the display area corresponding to the screen area of the background type through the driving circuit of the display screen.

Preferably, a character storage is also included, and the character encoding information corresponding to the shape, size, color and resolution of the character symbols is pre-stored in the character storage.

The beneficial effects of the present invention are: the display method first performs display accuracy classification and area division on the content of the display screen; then calculates display data and corresponding driving data according to the display accuracy classification and area division; finally drives the IC to drive the display screen according to the driving data The corresponding pixels in the image are displayed. The display method has a small calculation amount of display data, does not reduce the display accuracy, and is simple and effective;

Correspondingly, the display device consumes less power and is more durable.

Description of drawings

Fig. 1 is a flowchart of the display method in Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of screen layout information of a frame screen in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a frame picture in Embodiment 1 of the present invention;

4 is a schematic structural diagram of a display device in Embodiment 2 of the present invention;

In the picture:

1 - graphics system;

2 - frame image processing system; 21 - information acquisition module; 22 - classification module; 23 - processing module; 24 - memory;

3 - drive circuit;

4 - Display screen.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the display method and the display device of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

How to face the contradiction of high pixel demand and low power consumption at the same time? After earnest research, the inventor found that: in fact, human eyes have different resolution perceptions for different display contents. For example, the human eye is more sensitive to text and requires a high resolution; it is less sensitive to static pictures; it is less sensitive to dynamic video images; it does not care much about the display background. However, in the display device, the driving circuit does not care about the specific content of the display, only point-to-point driving. Based on this fact, the present invention proposes a display technology that dynamically adjusts the resolution based on the area of the content, or proposes a display technology that provides different resolution data for different content of the display screen. That is, firstly perform display accuracy classification and area division on the content of the display screen; then calculate display data and corresponding driving data according to the display accuracy classification and area division; finally drive IC to drive corresponding pixels in the display screen to display images according to the driving data .

Example 1:

This embodiment provides a display method, which has a small amount of calculation for display data, does not reduce display accuracy, and is simple and effective.

Usually, the display process of the display device is as follows: firstly, the graphics system generates the image information of each frame of picture according to the input display data, where the content and respective areas of each frame of picture are completely specified by the graphics system application program; then, according to the image information Information, forming pixel point information is provided to the driving circuit, and through the opening and closing states of multiple physical pixels of the display screen, a frame picture visible to the human eye is finally formed.

In the display method of this embodiment, the display device supports multiple display resolution levels, the graphics processing system provides the capability of multiple pixel densities for one frame, and the display screen physically supports high-resolution display.

Specifically, as shown in Figure 1, the display method includes steps:

S1) Obtain the screen layout information of the frame picture, divide the frame picture into multiple picture areas, and record the area shape and area size of each picture area.

The graphics system in the display device includes CPU or GPU and its embedded operating system, such as Android system or ios system. In order to support display devices or display devices with multiple resolutions when specifying the size of a picture area, most graphics systems adopt length units that are independent of pixel density. For example, the Android system uses DP as the length unit, and 1DP corresponds to different numbers of physical pixels in different pixel densities. This feature of the graphics system perfectly supports the display method of this embodiment, that is, as long as the pixel density of a certain area of a frame of the graphics system is obtained, the graphics system can convert the actual pixels of the corresponding area according to the length information specified by the application count.

In this step, based on the distinction of the different properties of the screen by the graphics system, the screen layout information of the frame screen can be obtained by reading the XML source code of each frame screen specified by the application program, and the frame screen is divided into multiple screen areas, and the screen The various content in the area and the area shape and area size of the various content. That is, distinguish different display types of each frame of picture content and define the area shape and area size of each type of display content in each frame of picture.

According to the screen layout information provided by the graphics system, the display content types include text, static pictures, dynamic videos and backgrounds other than the above areas. As shown in Figure 2, it is the frame picture corresponding to the XML source code of the following application program, which consists of background display content, static picture display content, text display content, and dynamic video display content (icons in Figure 2), etc. Elemental composition. The positions, sizes, and types of all these elements are specified by the following XML source files, for example:

in:

The android:background part specifies the background of the screen;

The ImageView part specifies the picture of the screen;

The text of the screen is specified in the TextView part.

It can be seen that when the display device is preparing to display a frame of picture, it can obtain enough information from the code of the application program itself, that is, what types of display content each frame of picture has and the area shape and area size corresponding to each type of display content.

S2) Obtain the number of display resolution levels supported by the display device, and set different picture resolutions for each picture area according to different display content types and display resolution levels of the picture area.

In this step, the number of display resolution levels supported by the display device is read, and then in the subsequent data processing process, different picture resolution levels can be set for different display content types of a frame of pictures according to a reasonable range, and form Subframe (the area of each picture resolution level can be regarded as a subframe). For example, the display device supports display of four resolution levels of high, medium, low, and very low. At this time, it is entirely possible to determine which resolution level to use to calculate the picture data according to the resolution level selected by the current display system. For example, for a picture, when the system is idle, you can use a high resolution level; when the system is busy, you can use a medium resolution level; when the system is in low power, you can use a low resolution level or even a very low resolution level Calculate screen data.

In the display method of this embodiment, the screen resolutions of different display content types are sequentially reduced in the order of text, static pictures, dynamic videos, and backgrounds.

It should be understood here that this embodiment does not limit the specific method for dividing the screen resolution. The display device in this embodiment has the ability to divide, and how to divide it can be selected according to the needs of actual applications. For example, by The adoption of the above resolution levels depends on the state of the system and the current display resolution of the display.

S3) Prepare data to be displayed according to the screen resolution corresponding to the screen area.

In this step, different screen resolutions are matched for different display content types, and data to be displayed is prepared according to the screen resolutions. Specifically include:

S31) Determine the screen resolution and corresponding screen parameters corresponding to each screen area according to the display content type. Among them, according to the display content type, there are:

Text screen parameters include the shape, size, color and resolution of text symbols in the corresponding screen area;

The picture parameters of the background class include the shape, size, position and color of the corresponding picture area;

The picture parameters of the static picture class and the dynamic video class include the shape, size, position and pixel display information of the corresponding picture area.

Preferably, the picture resolution of the text category is 1080P (1920*1080), the picture resolution of the static picture category is 720P (1280*720), the picture resolution of the dynamic video category is 480P (854*480), and the background category The screen resolution is 320P (480*320).

The display screen with the highest resolution (that is, the full resolution is 1080P) is taken as an example for illustration. If the human eye is moderately sensitive to static pictures (required display resolution is 480*810), low to dynamic video (required display resolution is 320*540), and sensitive to text The degree is high (required display resolution is 640*1080). Then, for a standard 1080P frame picture as shown in Figure 3, the frame picture is divided into three picture areas: upper, middle and lower, and the upper area is a static picture (actual display resolution is 640*1080). The middle area is for dynamic video (the actual display resolution is 640*1080), and the lower area is for text (the actual display resolution is 640*1080).

S32) Perform corresponding data processing according to the screen parameters corresponding to the display content type, so as to prepare corresponding data to be displayed.

The process of data processing is mainly to abstract the sub-frame data into pixel display information including the picture features in the sub-frame according to the display content type corresponding to each screen area. For different display content types, the abstraction process includes the pixel display of query text symbols information, sampling high-resolution subframes to corresponding low display resolutions, etc. After the subframe data is calculated for each picture area of each frame picture, the subframe data (position, size, pixel point information or text information, etc.) is cached. Among them, according to the screen parameters corresponding to the display content type, there are:

The data processing of the text-type display content includes: querying the shape, size, color and resolution of the text symbols corresponding to the text-type display content from the memory with pre-stored text codes, converting them into pixel display information of the corresponding text codes and caching them ;

The data processing of the display content of the static picture includes: sampling the display content of the static picture according to the input-output ratio of the current display resolution/first resolution to form pixel display information and caching;

The data processing of the display content of the dynamic video category includes: sampling the display content of the dynamic video category according to the input-output ratio of the current display resolution/second resolution to form pixel display information and caching;

The data processing of the display content of the background class includes: sampling the shape, size and color of the display content of the background class according to the input-output ratio of the current display resolution/third resolution to form pixel display information and buffering.

As shown in the frame display page of Figure 3, the display content is divided into four types, namely gray background, blue static picture, green dynamic video and red text. For example, the display resolution (also called physical resolution) of the display screen is 1920*1080, according to the display method of the prior art, the amount of data calculation for each frame of the graphics system is:

1920*1080＝640*1080+640*1080+640*1080

In the prior art, the graphics system will transmit the display information of 2,073,600 pixels to the driving circuit, but the driving circuit does not care about the specific display content.

However, according to the display method provided in this embodiment, the amount of data calculation for each frame of the graphics system is:

480*810+320*540+640*1080;

If adding the special processing to the text symbol content in the display method of this embodiment, that is, the graphics system does not need to calculate the pixel display information corresponding to the text symbol, but the pixel display information of the text symbol is pre-stored by the display screen in its own ROM. , the amount of calculation and data transmission of the graphics system will be further reduced.

It can be seen that the use of the display method in this embodiment can reduce the calculation amount of the graphics system and the bandwidth requirement of data transmission, thereby achieving the purpose of saving power consumption.

S4) Prepare driving data according to the data to be displayed, drive the physical pixels in the display area corresponding to each picture area in the display screen, and display the whole frame of picture.

Usually, the display screen has a fixed physical resolution (corresponding to a certain physical pixel point), such as 1920*1080, so the display screen generally only accepts input data of one resolution. The process of preparing the driving data is mainly to restore the sub-frame data to the full-frame pixel information according to the display content type corresponding to each screen area. For different display content types, the restoration process includes obtaining the pixel point information of the text symbol through the pixel information, and the The low resolution subframes are interpolated to the corresponding display resolution, etc. After the sub-frame data is calculated for each screen area of each frame, the buffered sub-frame data (position, size, pixel point information or text information, etc.) is transmitted to the driver IC of the display screen.

The driving circuit is used to convert the received driving data, control signal and clock signal into data signal, control signal and clock signal suitable for data and gate drive IC respectively. After receiving the interpolated driving data, the driving circuit drives corresponding physical pixels for display.

In this step, the display content of the text class is displayed at full resolution, and the pixel display information of the text code is the text drive data corresponding to the current display resolution of the display screen, and the text drive data is transmitted to the text class through the drive circuit of the display screen The corresponding physical pixels are driven point-to-point in the display area corresponding to the screen area;

The display content of the static picture class is displayed at the first resolution, and the pixel display information of the display content of the static picture class is interpolated according to the input-output ratio of the first resolution/current display resolution to form a static picture driving data, and the static picture driving data is transmitted to the register, and then drive the corresponding physical pixels to the display area corresponding to the screen area of the static picture through the driving circuit of the display screen;

The display content of the dynamic video class is displayed at the second resolution, and the pixel display information of the display content of the dynamic video class is interpolated according to the input-output ratio of the second resolution/current display resolution to form dynamic video drive data, and the dynamic video drive data is transmitted to the register, and then drive the corresponding physical pixels to the display area corresponding to the dynamic video picture area through the driving circuit of the display screen;

The display content of the background class is displayed at the third resolution, and the pixel display information of the display content of the background class is interpolated according to the input-output ratio of the third resolution/current display resolution to form background driving data, and the background driving data is transmitted to the register, and then The corresponding physical pixels are driven to the display area corresponding to the background image area through the driving circuit of the display screen.

Corresponding to the step S3), the picture resolution of the text class is full resolution, and the full resolution is 1080P; the picture resolution of the static picture class is the first resolution, and the first resolution is 720P; the picture resolution of the dynamic video class is The second resolution, the second resolution is 480P; the background image resolution is the third resolution, the third resolution is 320P.

It should be understood here that the display method in this embodiment can support full-resolution display and display lower than full-resolution based on the display driver IC that cooperates with the graphics system. For example, when it is detected that the amount of data currently to be displayed is lower than the actual display data required by the display screen, the pixel data interpolation process is performed preferentially. In the static picture display part shown in Figure 3, the physical resolution (i.e. physical resolution) of the display screen corresponding to this display area is 640*1080, and the display method in this embodiment is adopted, and the sampled data to be displayed is only 480*810, the interpolated data to be displayed actually received by the display driver IC is 640*1080, the driver IC can normally drive the display for normal display.

It should be understood here that, for a screen area with overlapping display of more than one display content type, data processing is performed according to the relatively largest screen resolution among the screen resolutions of the display content types contained in the screen area. Taking the frame picture shown in Figure 2 as an example, the processing principle for the overlapping area with multiple types of display content (specifically, the overlapping part of the static picture and the text "mysterious activity" in Figure 2) is explained as follows:

For overlapping areas, the resolution class therein is drawn at the highest resolution class of all content types in the area; for example, the resolution class for the text "Mystery Activity"; lower-res content within the overlapping area will be upscaled to The highest level of resolution in the area is displayed, for example, part of the background image below the same area as the text "mysterious activity".

For non-overlapping areas, the content of the low-resolution level is not adjusted for resolution. For example, remove other parts of the text coverage area in Figure 2.

It should be understood here that the display method in this embodiment does not involve any method and program for identifying image content. The text in the above-mentioned overlapping area is not part of the content of the static picture, but a part that has nothing to do with the static picture. The visual effect of the two lies in the overlapping positions. For static image content with text or dynamic video content with text, such as movie subtitles, the resolution will not be adjusted. In this case, the text content is regarded as the content of the static image or dynamic video itself, and will be unified Display the screen resolution level defined by the static picture class or the dynamic video class.

The display method for dynamically adjusting the resolution of the display area provided by this embodiment can ensure that the power consumption caused by the calculation and display data of the graphics system is reduced as much as possible without sacrificing the display resolution for specific content; not only that, when the mobile display device The power is in a state of tension, and the graphics system can also fully adopt the lowest picture resolution level supported by the drive circuit to prepare the pixel display information of the entire display screen, thereby greatly reducing the power consumption of the screen display. For example, in the power saving mode of the mobile phone, when a certain condition is triggered, the display brightness or display contrast will be automatically lowered; All types of graphic content are calculated at the lowest resolution class for maximum power savings.

The display method in this embodiment greatly reduces the calculation amount of each frame in the graphics system, thereby achieving the purpose of saving power consumption, and is especially suitable for mobile display devices using batteries, such as mobile phones.

Example 2:

This embodiment provides a display device corresponding to the display method in Embodiment 1. The display device consumes less power and is more durable.

In this embodiment, the display device has the following characteristics:

1. Provide support for data input with different resolutions for different areas of a screen.

2. The graphics system divides different display contents of a screen into different resolutions according to the resolution division capability of the display screen and the preset scheme of content resolution.

3. The graphics system calculates the image information respectively according to the resolution division results.

4. The display device provides preset pixel information for text and symbols in its own ROM.

5. The graphics system does not need to calculate the pixel point information of the image whose display content is text and symbols, but provides the coding information of the text and symbols through the frame image processing system, and queries the pixel point display information through the built-in ROM and the input coding information .

As shown in FIG. 4, the display device includes a graphics system 1, a frame image processing system 2, a driving circuit 3 and a display screen 4, and the display screen 4 includes a plurality of physical pixels arranged in a matrix, wherein:

Graphics system 1, connected to the frame image processing system, for receiving and transmitting frame image display data to the frame image processing system;

The frame image processing system 2 is also connected with the driving circuit, and is used to obtain the picture layout information of the frame picture, and divide the frame picture into a plurality of picture areas with different picture resolutions according to the picture layout information, and record the area shape of each picture area and area size; and prepare data to be displayed and corresponding driving data according to the screen resolution corresponding to the screen area;

The driving circuit 3 is connected to the display screen 4, and is used to receive the driving data of the frame image processing system, and drive the physical pixels in the display area corresponding to each screen area of the display screen 4;

The display screen 4 is driven by the driving circuit 3 to display the whole frame of the picture.

Specifically, referring to FIG. 4, the frame image processing system 2 includes a picture information acquisition module 21, a classification module 22 and a processing module 23, wherein:

An information acquisition module 21, configured to acquire picture layout information of a frame picture;

The classification module 22 is configured to divide the frame picture into multiple picture areas with different picture resolutions according to the picture layout information, and record the area shape and area size of each picture area. In the classification module 22, according to the number of display resolution levels supported by the display device, and according to the display resolution levels, the different picture resolutions of each picture area in the frame picture are divided into different display content types, and the display content types include text, Static pictures, dynamic videos, and backgrounds other than the above-mentioned areas, and the screen resolutions of different display content types are sequentially reduced in the order of text, static pictures, dynamic videos, and backgrounds.

The processing module 23 is configured to prepare data to be displayed and corresponding driving data according to the screen resolution corresponding to the screen area, and the driving data is used to drive corresponding physical pixels in the display screen. Specifically, the processing module 23 includes a query unit, a sampling unit and an interpolation unit, wherein:

A query unit, configured to determine the picture resolution and corresponding picture parameters corresponding to each picture area according to the display content type;

The sampling unit is used to perform corresponding data processing according to the screen parameters corresponding to the display content type, so as to prepare corresponding data to be displayed;

The interpolation unit is configured to provide driving data corresponding to the current display resolution of the display screen according to the data to be displayed, so that the data to be displayed is used to drive corresponding physical pixels in the display screen.

According to the picture parameters corresponding to the display content type, the sampling unit includes text data processors, background data processors, static picture data processors and dynamic video data processors, among which:

The character data processor is used to query the shape, size, color and resolution of the character symbol corresponding to the display content of the character class to the memory 24 pre-stored with the character code, and convert it into corresponding pixel display information of the character code and cache it;

Static image data processor, used to sample the display content of the static image according to the input-output ratio of the current display resolution/first resolution to form pixel display information and cache it;

The dynamic video data processor is used to sample the display content of the dynamic video according to the input-output ratio of the current display resolution/second resolution to form pixel display information and cache it;

The background class data processor is used to sample the shape, size and color of the background class display content according to the input-output ratio of the current display resolution/third resolution to form pixel display information and cache it.

Correspondingly, for the text display content displayed at full resolution, the pixel display information encoded by the text is the text driving data corresponding to the current display resolution of the display screen, and the text driving data is sent to the text class through the driving circuit of the display screen. Drive the corresponding physical pixels point-to-point in the display area corresponding to the screen area;

For the static picture display content displayed at the first resolution, the interpolation unit receives the pixel display information of the static picture display content, and interpolates according to the input-output ratio of the first resolution/full resolution to form the static picture drive data, static The picture driving data is transmitted to the register, and the driving circuit used to drive the display screen drives the corresponding physical pixels to the display area corresponding to the picture area of the static picture class;

For the dynamic video display content displayed at the second resolution, the driving circuit provides the pixel display information in the dynamic video display to the interpolation unit, and the interpolation unit interpolates according to the input-output ratio of the second resolution/full resolution to form a dynamic video Drive data, dynamic video slice drive data is used to drive the drive circuit of the display to drive the corresponding physical pixels to the display area corresponding to the dynamic video picture area;

For the background display content displayed at the third resolution, the pixel display information of the background display content is interpolated according to the input-output ratio of the third resolution/current display resolution to form background driving data, and the background driving data is transmitted to the register, Furthermore, the corresponding physical pixels are driven to the display area corresponding to the background image area through the driving circuit of the display screen.

It is easy to understand that the display device also includes a character memory 24, and the character code information corresponding to the shape, size, color and resolution of the character symbol is pre-stored in the character memory ROM. The text encoding information corresponds to the pixel display information with text symbols. For text symbols, the graphics system does not need to provide the display information of each pixel to the driver circuit of the display, but provides information such as the encoding, size, color, and resolution level of the entire text symbol. Reduce the computing pressure and data bandwidth pressure of the graphics system. The driving circuit displays information through the pixels of a certain text code found out.

It should be understood here that since the driving circuit does not care about the specific content of the display, it only focuses on point-to-point driving, so after the sampling unit of the frame image processing system in Figure 4 completes the information to be displayed in multiple areas of a screen, the driving circuit actually It is not possible to directly drive the display screen. Because the "information to be displayed" is actually not exactly the pixel information of the physical resolution in the traditional sense. For example, the physical resolution of the display screen is 1920*1080. Using the display method of the prior art, the input information obtained by the driving circuit is usually information of 1920*1080 pixels, and the driving circuit can directly drive the display screen point-to-point. In the display device of this embodiment, the input information that the driving circuit needs to obtain for driving (a simple example including two subframes) may be information of 810*1080 pixels+information of 405*540 pixels . At this time, in order to drive the physical pixels of the entire 1920*1080 pixels of the display screen, interpolation processing is performed before the data to be displayed enters the driving circuit, that is, the information of 405*540 pixels is interpolated to the driving data of 810*1080. The interpolation function here can be realized by software, such as setting the program before the driving circuit, so that the driving circuit can simply copy the pixel points of 405*540 to 810*1080, and then drive the physical pixels of the display point to point; or use hardware to realize For example, a pixel point information control circuit is set before the driving circuit, so that the driving circuit simultaneously drives two adjacent physical pixels of the display screen.

In this embodiment, the display resolution level supported by the display device is obtained in advance through the frame image processing system 2, and the picture is further defined according to the display resolution level supported by the display device and the picture information to be presented by the application program of the graphics system 1. Classify and generate corresponding image data. The drive circuit 3 supports the reception of input data of multiple resolutions, such as: 1920*1080, 1280*720, 848*480 or 480*320, and can convert the input data of multiple resolutions into a unified display screen The input data suitable for the physical resolution of the display screen is used to drive the display screen. Therefore, a practical method is to directly update the driving circuit, and use a driving IC with an interpolation function to drive physical pixels, which is not limited here.

The main reason for this design is that the final implementation of the graphics system and frame image processing system is likely to require the support and assistance of the CPU and GPU of the mobile device. If the interpolation function is completely handled by the CPU and GPU, the processing energy consumption of the CPU and GPU will increase slightly, and the data output bandwidth of the graphics system will not be saved; in addition, compared to the routine work of the CPU and GPU, the interpolation process is relatively simple. The operation of the computer does not need high-performance, high-energy-consuming components such as CPU and GPU to complete. On the contrary, if the interpolation unit is implemented by a driving circuit or a new component with low performance and low energy consumption, in addition to avoiding the above problems, it also enables the display device itself to have the ability to support multiple regions and multiple resolutions. Therefore, in practical applications, the functions of the frame image processing system can be decomposed into two or more independent units to complete, which is not limited here.

To sum up, the frame image processing system in this embodiment can be an independent software unit or an independent hardware unit or a combination of software and hardware. Even, the functions of the frame image processing system can be integrated into the existing graphics In the system (such as including sampling processing and its previous functions) or in the driving circuit (such as the function of interpolation processing, a driver IC with interpolation function can be set at this time, or the interpolation function can be added to the display as an independent components of the driver IC).

Under the division condition of coarse screen resolution, the data to be displayed can be processed according to the following steps in the actual application process:

Step 1: Parse the type of displayed information. If it is text symbol display content, skip to step 2; if it is background display content, skip to step 3; if it is dynamic video and static image display content, directly skip to step 4;

Step 2: Provide the size, color and coding information of the text symbol to the display text symbol DSP to obtain the pixel display information of the text code; jump to step 4;

Step 3: Provide color value and size information to registers in the driving circuit to obtain pixel display information of color content;

Step 4: Drive the physical pixels according to the pixel display information of each display content, the corresponding area information and resolution level. For example, for the text part of 1080P resolution level, each physical pixel is driven point-to-point in the designated area; for the 720P still picture part, the corresponding physical pixel is interpolated and driven according to the input-output ratio of 720P/1080P in the designated area. The interpolation driving method of dynamic video and background display content is similar to the interpolation driving method of static pictures.

After the above steps, the driving data of the complete frame display image is prepared, the driving data is transmitted to the driving circuit, and the physical pixels of the display screen are driven by the driving circuit to complete the display of the whole frame of image.

In the display device of this embodiment, the driving circuit provides programmable display support for different regions and different resolution levels. For example, a point-to-point full-resolution display can be provided for a certain picture area; an interpolated resolution display can be provided for a certain picture area, for example, the physical pixel of a certain picture area is 640*1080, but the classification module in the frame image processing system The screen resolution of the data to be displayed corresponding to the display content in the screen area divided by 22 is only 320*540, so the processing module 23 needs to process the data to display the image data of 320*540 to a display resolution of 640*1080 on the physical pixels.

Meanwhile, in the display device of this embodiment, the display screen provides low-power DSP support for displaying programmable characters and symbols. The data interface between the graphics system, the frame image processing system and the driving circuit is more powerful than the data structure between the graphics system and the driving circuit in the prior art. Among them, the data transmitted by the frame image processing system, the graphics system, and the driving circuit include:

1. The number of screen areas and the size of each screen area. Here, if the entire display screen adopts the same screen resolution, the number of screen areas is 1, and the size is the entire screen; if the entire screen is divided into three screen resolutions, the number of screen areas is 3, and each The size of each screen area is 1/3 screen;

2. The screen resolution level of each display area. For the picture area of full resolution level, the driving circuit will drive each physical pixel in the display area point-to-point, such as 1/2 resolution level;

3. The display content type of each screen area, that is, the coded data of the text display content, the color data of the background display content, or the pixel data of the static picture and dynamic video;

4. Display content information. Here, if the display content is text, the display content information is the encoding (such as ascii code), size (number of pixels of length and width) and color (RGB value) of text symbols; if the display content is static pictures and dynamic For video, the display content is the same as the existing display content, which is the display information of pixels; if the display content is background, the display content is color (RGB value).

The working process of the display device is:

After the display device is started, the graphics system (including CPU, graphics card and memory) obtains the display resolution level supported by the display device. For example, the display device supports four levels of picture resolution, namely 1080P (1920*1080), 720P (1280*720), 480P (854*480) and 320P (480*320).

When the display device has a display requirement, the frame image processing system takes the screen layout information of the frame picture and analyzes the display content, combines the display resolution support level obtained from the display device, and classifies the display content according to the preset scheme, into static Picture category, dynamic video category, text category and background category; and assign a picture resolution level to each display content type. For example, a preset scheme is that the screen resolution of the display content of the static picture is 720P, the screen resolution of the display content of the dynamic video is 480P, the screen resolution of the display content of the background is 320P, and the screen resolution of the text The screen resolution of the displayed content is full resolution 1080P.

After the display content classification and screen resolution level division are completed, the frame image processing system will prepare data to be driven for the driving circuit according to different types of display content. For example, the static picture class and the dynamic video class need to prepare their own area size, position and pixel display information. The text class needs to prepare the area size position, text size, color and encoding information. The background class needs to prepare color information and area size and position (the default area of the background is the entire area outside the content area of other types).

The driving circuit drives and displays the physical pixels of the display area corresponding to each screen area to display the whole frame of images.

The display device performs different processing on the frame pictures according to the different degrees of perception of the resolution of different picture content, which greatly reduces the power consumption of the graphics system data processing, makes the display device more energy-saving, and is especially suitable for mobile devices using batteries. Display devices, such as mobile phone applications.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (15)

1. a kind of display methods, it is characterised in that including step：

S1) the picture layout information of getting frame picture, multiple picture areas are divided into by the frame picture, and are recorded each described The region shape and area size of picture area；

S2 the display resolution grade quantity that display device is supported) is obtained, and according to the different display contents of the picture area Type and the display resolution grade, different screen resolutions is set for each picture area；

S3) according to the corresponding screen resolution of the picture area, data to be displayed is prepared；

S4 driving data) is prepared according to the data to be displayed, drives display corresponding with each picture area in display screen Physical picture element point in region, shows frame picture described in whole frame.

2. display methods according to claim 1, it is characterised in that in S2) in, the display content type includes word Class, static images class, dynamic video class and background classes in addition to the regions described above, also, the different display content types are pressed According to the word class, the static images class, the dynamic video class, the background classes the order screen resolution successively Reduce.

3. display methods according to claim 2, it is characterised in that S3) include：

S31 the corresponding screen resolution of each picture area and correspondence) are determined according to the display content type Frame parameter；

S32 corresponding data processing) is carried out according to the corresponding frame parameter of the display content type, it is corresponding to prepare Data to be displayed.

4. display methods according to claim 3, it is characterised in that S31) in, according to the display content type, have：

The frame parameter of the word class includes shape, size, the color of the letter symbol of the corresponding picture area And resolution ratio；

The frame parameter of the background classes includes shape, size, position and the color of the corresponding picture area；

Shape of the frame parameter of the static images class and the dynamic video class including the corresponding picture area, Size, position and pixel show information.

5. display methods according to claim 3, it is characterised in that S32) in, corresponded to according to the display content type The frame parameter, have：

The data processing of the display content of the word class includes：It is literary described in the memory query of literal code to prestoring Shape, size, color and the resolution ratio of the corresponding letter symbol of the display content of word class, are converted into corresponding literal code Pixel show and information and cached；

The data processing of the display content of the static images class includes：By the display content of the static images class Input-output ratio according to current display resolution/first resolution samples to form pixel display information and be cached；

The data processing of the display content of the dynamic video class includes：By the display content of the dynamic video class Input-output ratio according to current display resolution/second resolution samples to form pixel display information and be cached；

The displays content data processing of the background classes includes：By the shape of the display content of the background classes, greatly Small and color is sampled according to the input-output ratio of the resolution ratio of current display resolution/the 3rd to be formed pixel and shows information and delayed Deposit.

6. display methods according to claim 5, it is characterised in that for display content type more than one described The picture area of overlapping display, is differentiated according to picture described in the display content type included in the picture area The screen resolution of relative maximum performs data processing in rate.

7. display methods according to claim 5, it is characterised in that S4) in, to the display content of the word class Carry out full resolution to show, the pixel of literal code shows that information is corresponding with the display screen current display resolution Word driving data, the picture of the word driving data by the drive circuit of the display screen to the word class The corresponding physical picture element point is driven in the corresponding display area in region point-to-pointly；

The display content progress first resolution of the static images class is shown, the display of the static images class The pixel of content shows that information forms static map according to the input-output ratio interpolation of first resolution/current display resolution Piece driving data, the static images driving data are transferred to register, and then by the drive circuit of the display screen to institute State the corresponding corresponding physical picture element point of display area driving of the picture area of static images class；

The display content progress second resolution of the dynamic video class is shown, the display of the dynamic video class The pixel of content shows that information forms dynamic vision according to the input-output ratio interpolation of second resolution/current display resolution Frequency driving data, the dynamic video driving data is transferred to the register, and then passes through the drive circuit of the display screen To the corresponding corresponding physical picture element point of display area driving of the picture area of the dynamic video class；

The 3rd resolution ratio is carried out to the display contents of the background classes to show, the institute of the display content of the background classes State pixel and show that information forms background driving data according to the input-output ratio interpolation of three resolution ratio/current display resolution, The background driving data is transferred to the register, and then the picture by the drive circuit of the display screen to background classes The corresponding corresponding physical picture element point of display area driving in face region.

8. display methods according to claim 7, it is characterised in that the screen resolution of the word class is complete point Resolution, full resolution 1080P；The screen resolution of the static images class is first resolution, and first resolution is 720P；The screen resolution of the dynamic video class is second resolution, second resolution 480P；The background classes The screen resolution is the 3rd resolution ratio, and the 3rd resolution ratio is 320P.

9. a kind of display device, including graphics system, drive circuit and display screen, the display screen includes multiple matrix arrangements Physical picture element point, it is characterised in that two field picture processing system is further included, wherein：

The graphics system, is connected with the two field picture processing system, for receiving and transmission frame picture display data is to described Two field picture processing system；

The two field picture processing system, is also connected with the drive circuit, for picture area different display content types with And display resolution grade, for each picture area, different screen resolutions is set；And according to the picture area pair The screen resolution answered, prepares data to be displayed and corresponding driving data；

The drive circuit, is connected with the display screen, for receiving the driving data of the two field picture processing system, and Drive the physical picture element point in display screen display area corresponding with each picture area；

The display screen, is driven by the drive circuit, shows frame picture described in whole frame.

10. display device according to claim 9, it is characterised in that the two field picture processing system includes image information Acquisition module, sort module and processing module, wherein：

Described information acquisition module, for obtaining the picture layout information of the frame picture；

The sort module, for according to the picture layout information, the frame picture to be divided into multiple and different pictures The picture area of resolution ratio, records the region shape and area size of each picture area；

The processing module, for according to the corresponding screen resolution of the picture area, preparing the number to be shown According to this and corresponding driving data, the driving data are used to drive the corresponding physical picture element point in the display screen.

11. display device according to claim 10, it is characterised in that in the sort module, according to the display The display resolution grade quantity that device is supported, and according to the display resolution grade by each picture in the frame picture The different screen resolutions in region are divided into different display content types, the display content type include word class, Static images class, dynamic video class and background classes in addition to the regions described above, also, the different display content types are according to institute Word class, the static images class, the dynamic video class, the order of the background classes screen resolution is stated to drop successively It is low.

12. display device according to claim 10, it is characterised in that the processing module includes query unit, sampling Unit and interpolating unit, wherein：

The query unit, for determining the corresponding picture point of each picture area according to the display content type Resolution and corresponding frame parameter；

The sampling unit, for being carried out according to the corresponding frame parameter of the display content type at corresponding data Reason, to prepare the corresponding data to be displayed；

The interpolating unit, for providing drive corresponding with the display screen current display resolution according to the data to be displayed Dynamic data, for driving the corresponding physical picture element point in the display screen.

13. display device according to claim 12, it is characterised in that according to the display content type is corresponding Frame parameter, the sampling unit include word class data processor, background classes data processor, static images class data processing Device and dynamic video class data processor, wherein：

The word class data processor, for the display for prestoring word class described in the memory query of literal code Shape, size, color and the resolution ratio of the corresponding letter symbol of content, the pixel for being converted into corresponding literal code show information And cached；

The static images class data processor, for the display content of the static images class to be divided according to current display The input-output ratio of resolution/first resolution samples to form pixel display information and be cached；

The dynamic video class data processor, for the display content of the dynamic video class to be divided according to current display The input-output ratio of resolution/second resolution samples to form pixel display information and be cached；

The background classes data processor, for by shape, size and the color of the display content of the background classes according to The input-output ratio of the resolution ratio of current display resolution/the 3rd, which is sampled, to be formed pixel and shows information and cached.

14. display device according to claim 13, it is characterised in that

For the word class display content shown with full resolution, the pixel of literal code shows that information is Word driving data corresponding with the display screen current display resolution, the word driving data pass through the display screen Drive circuit drives corresponding described point-to-pointly into the corresponding display area of the picture area of the word class Physical picture element point；

For the static images class display content shown with first resolution, the interpolating unit receives the static state The pixel of picture category display content shows information, and according to the input-output ratio of first resolution/current display resolution Interpolation forms static images driving data, and the static images driving data is transferred to register, for driving the display screen The corresponding corresponding physical picture element of display area driving of the picture area from drive circuit to static images class Point；

For the dynamic video class display content shown with second resolution, the drive circuit is to the interpolation list Member provide the dynamic video class show in the pixel show information, the interpolating unit is according to second resolution/currently The input-output ratio interpolation of display resolution forms dynamic video driving data, and the dynamic video driving data is used to drive institute It is corresponding described to state the picture area corresponding display area driving of the drive circuit of display screen to dynamic video class Physical picture element point；

For the background classes display content shown with the 3rd resolution ratio, the institute of the display content of the background classes State pixel and show that information forms background driving data according to the input-output ratio interpolation of three resolution ratio/current display resolution, The background driving data is transferred to the register, and then the picture by the drive circuit of the display screen to background classes The corresponding corresponding physical picture element point of display area driving in face region.

15. display device according to claim 13, it is characterised in that further include character memory, the character storage Literal code information corresponding with the shape of letter symbol, size, color and resolution ratio is prestored in device.