CN117008861A - A display method and related device - Google Patents

Abstract

This application discloses a display method and related devices, which are applied in the technical field of image display. The method applies a display system, which includes a host, a display driver chip, and a screen that are communicated with each other in sequence. The display method includes: when a first change occurs in the direction of the screen, the host obtains a first conversion function corresponding to the first change, The original image is converted according to the first conversion function to obtain the target image; the host writes the target image into the image display memory of the display driver chip; the display driver chip reads the target image from the image display memory and displays it on the screen. This method can solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

Description

A display method and related device

Technical Field

The present application relates to the field of image display technology, and in particular to a display method and related devices.

Background Art

In the field of handheld terminal equipment, thin film transistor-liquid crystal display (TFT-LCD) is often used for image display, and the image is often displayed after being rotated. Currently, most common TFT-LCD driver chips have a hardware rotation function, which can rotate the screen by configuring other internal registers.

However, when the screen is rotated, the pixel data of the image is written into and read from the graphic random access memory (G-RAM) in inconsistent directions, resulting in a phenomenon of image fragmentation when the screen is refreshed.

Therefore, how to solve the problem of screen fragmentation when refreshing the screen due to screen rotation has become a key research topic.

Summary of the invention

The embodiments of the present application provide a display method and related devices, which can solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In a first aspect, an embodiment of the present application provides a display method, which is applied to a display system, wherein the display system includes a host, a display driver chip, and a screen that are sequentially connected in communication, and the display method includes:

When a first change occurs in the direction of the screen, the host obtains a first conversion function corresponding to the first change, and converts the original image according to the first conversion function to obtain a target image;

The host writes the target image into the image display memory of the display driver chip;

The display driver chip reads the target image from the image display memory and displays it through the screen.

In an embodiment of the present application, a display method is provided. When a first change occurs in the direction of a screen in a display system, a host obtains a first conversion function corresponding to the first change, and converts an original image according to the first conversion function to obtain a target image. The target image is then written into an image display memory of a display driver chip in the display system. The display driver chip reads the target image from the image display memory and displays it through the screen in the display system.

In the embodiment of the present application, since the direction change of the original image is the same as the direction change of the screen, the direction in which the target image is written to the image display memory of the display driver chip is also the same as the direction in which the target image is read from the image display memory. Therefore, even if the direction of the screen changes, there will no longer be a phenomenon of screen fragmentation when the screen is refreshed, which can solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In a possible implementation manner, if the original image is a coordinate point, the first change is a 90° clockwise rotation, and the first conversion function corresponds to x ₁ =y ₂ , y ₁ =lcd_h-1-x ₂ ;

Alternatively, the first change is a clockwise rotation of 180°, and the first conversion function corresponds to x ₁ = lcd_w-1-x ₂ , y ₁ = lcd_h-1-y ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = x ₂ ;

Alternatively, the first change is a mirror image, and the first conversion function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-1-y ₂ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = y ₂ ;

Alternatively, the first change is a mirror image and a 270° clockwise rotation, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = lcd_h-1-x ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point in the original image, _y1 is the vertical coordinate of the first coordinate point in the original image, _x2 is the horizontal coordinate of the second coordinate point in the target image, _y2 is the vertical coordinate of the second coordinate point in the target image, lcd_w is the width of the resolution of the screen, lcd_h is the height of the resolution of the screen, and the second coordinate point is the coordinate point corresponding to the first coordinate point after the first change.

In an embodiment of the present application, a possible specific implementation method for obtaining a target image is provided. Specifically, if the original image is a coordinate point, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between a coordinate point in the original image (i.e., the first coordinate point) and a coordinate point in the target image (i.e., the second coordinate point), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

It should be understood that the width of the screen resolution mentioned in this application refers to the number of pixels on the horizontal (x-axis) side of the screen, and the height of the screen resolution refers to the number of pixels on the vertical (y-axis) side of the screen. This will not be discussed in detail later.

In a possible implementation manner, if the original image is a line segment, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =lcd_h-1-x ₂ ;

Alternatively, the first change is a clockwise rotation of 180°, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = lcd_h-1-y ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = x ₂ ;

Alternatively, the first change is a mirror image, and the first conversion function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-1-y ₂ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = y ₂ ;

Alternatively, the first change is a mirror image and a 270° clockwise rotation, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = lcd_h-1-x ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point on the first line segment in the original image, _y1 is the vertical coordinate of the first coordinate point on the first line segment in the original image, _x2 is the horizontal coordinate of the second coordinate point on the second line segment in the target image, _y2 is the vertical coordinate of the second coordinate point on the second line segment in the target image, lcd_w is the width of the resolution of the screen, lcd_h is the height of the resolution of the screen, the second line segment is the line segment corresponding to the first line segment after the first change, and the second coordinate point on the second line segment is the coordinate point corresponding to the first coordinate point on the first line segment after the first change.

In an embodiment of the present application, a possible specific implementation method for obtaining a target image is provided. Specifically, if the original image is a line segment, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between the coordinate point of the line segment in the original image (i.e., the first coordinate point on the first line segment) and the coordinate point of the line segment in the target image (i.e., the second coordinate point on the second line segment), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In a possible implementation manner, if the original image is a rectangular window, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =lcd_h-x ₂ -w ₂ , w ₁ =h ₂ , h ₁ =w ₂ ;

Alternatively, the first change is a clockwise rotation of 180°, and the first conversion function corresponds to: x ₁ = lcd_w - x ₂ - w ₂ , y ₁ = lcd_h - y ₂ - h ₂ , w ₁ = w ₂ , h ₁ = h ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w - y ₂ - h ₂ , y ₁ = x ₂ , w ₁ = h ₂ , h ₁ = w ₂ ;

Alternatively, the first change is a mirror image, and the first transfer function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-y ₂ -h ₂ , w ₁ =w ₂ , h ₁ =h ₂ ;

Alternatively, the first change is a mirror image and rotated 90° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-y ₂ -h ₂ , y ₁ = lcd_h-x ₂ -w ₂ , w ₁ = h ₂ , h ₁ = w ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w - x ₂ - w ₂ , y ₁ = y ₂ , w ₁ = w ₂ , h ₁ = h ₂ ;

Alternatively, the first change is a mirror image and a 270° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ , w ₁ =h ₂ , h ₁ =w ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point on the first window in the original image, _y1 is the vertical coordinate of the first coordinate point on the first window in the original image, _x2 is the horizontal coordinate of the second coordinate point on the second window in the target image, _y2 is the vertical coordinate of the second coordinate point on the second window in the target image, _w1 is the width of the first window, _h1 is the height of the first window, _w2 is the width of the second window, _h2 is the height of the second window, lcd_w is the width of the resolution of the screen, lcd_h is the height of the resolution of the screen, the second window is the window corresponding to the first window after the first change, and the second coordinate point on the second window is the coordinate point corresponding to the first coordinate point on the first window after the first change.

In an embodiment of the present application, a possible specific implementation method for obtaining a target image is provided. Specifically, if the original image is a rectangular window, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between the coordinate point of the rectangular window in the original image (i.e., the first coordinate point on the first window) and the coordinate point of the rectangular window in the target image (i.e., the second coordinate point on the second window), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In a possible implementation manner, if the original image is an irregular pattern, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₂ =h-1-y ₁ , y ₂ =x ₁ ;

Alternatively, the first change is a 180° clockwise rotation, and the first conversion function corresponds to: x ₂ =w-1-x ₁ , y ₂ =h-1-y ₁ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₂ =y ₁ , y ₂ =w-1-x ₁ ;

Alternatively, the first change is a mirror image, and the first conversion function corresponds to: x ₂ =x ₁ , y ₂ =h-1-y ₁ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₂ =y ₁ , y ₂ =x ₁ ;

Alternatively, the first change is a mirror image and a 180° clockwise rotation, and the first conversion function corresponds to: x ₂ =w-1-x ₁ , y ₂ =y ₁ ;

Alternatively, the first change is a mirror image and a 270° clockwise rotation, and the first conversion function corresponds to: x ₂ =h-1-y ₁ , y ₂ =w-1-x ₁ ;

Among them, _x1 is the horizontal coordinate of the first pixel point in the original image, _y1 is the vertical coordinate of the first pixel point in the original image, _x2 is the horizontal coordinate of the second pixel point in the target image, _y2 is the vertical coordinate of the second pixel point in the target image, w is the width of the original image, h is the height of the original image, and the second pixel point is the pixel point corresponding to the first pixel point after the first change.

In an embodiment of the present application, a possible specific implementation method for obtaining a target image is provided. Specifically, if the original image is an irregular pattern, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between a pixel point in the original image (i.e., a first pixel point) and a pixel point in the target image (i.e., a second pixel point), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In a second aspect, an embodiment of the present application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the method of the above-mentioned first aspect and any possible implementation method when executing the computer program.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program (also referred to as code, or instructions); when the computer program is run on a computer, the method of the above-mentioned first aspect and any possible implementation method is implemented.

In a fourth aspect, an embodiment of the present application provides a computer program product, which includes: a computer program (also referred to as code, or instructions); when the computer program is executed, the computer executes the method of the above-mentioned first aspect and any possible implementation method.

In a fifth aspect, an embodiment of the present application provides a display system, the display system comprising: a host, a display driver chip and a screen that are communicatively connected in sequence;

When a first change occurs in the direction of the screen, the host is used to obtain a first conversion function corresponding to the first change, and convert the original image according to the first conversion function to obtain a target image;

The host is also used to write the target image into the image display memory of the display driver chip;

The display driver chip is used to read the target image from the image display memory and display it through the screen;

The screen is used to display the target image.

Optionally, the first change and its corresponding first conversion function may be as described in the above-mentioned first aspect and any possible implementation method, and will not be described in detail here.

In addition, in the process of executing the method described in the first aspect and any possible implementation method, the process of sending information and/or receiving information in the above method can be understood as the process of outputting information by the processor, and/or the process of receiving input information by the processor. When outputting information, the processor can output the information to the transceiver (or communication interface, or sending module) so that it can be transmitted by the transceiver. After the information is output by the processor, it may also need to be processed in other ways before it reaches the transceiver. Similarly, when the processor receives input information, the transceiver (or communication interface, or sending module) receives the information and inputs it into the processor. Furthermore, after the transceiver receives the information, the information may need to be processed in other ways before it is input into the processor.

Based on the above principle, for example, the sending information mentioned in the above method can be understood as the processor outputting information. For another example, the receiving information can be understood as the processor receiving input information.

Optionally, for the operations of transmitting, sending and receiving involved in the processor, if there is no special explanation, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be more generally understood as operations such as processor output, reception and input.

Optionally, in the process of executing the method described in the first aspect and any possible implementation method, the processor may be a processor specifically used to execute these methods, or a processor that executes these methods by executing computer instructions in a memory, such as a general-purpose processor. The memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or may be separately arranged on different chips. The embodiment of the present application does not limit the type of memory and the arrangement of the memory and the processor.

In a possible implementation manner, the at least one memory is located outside the device.

In yet another possible implementation, the at least one memory is located within the device.

In yet another possible implementation, part of the at least one memory is located inside the device, and another part of the memory is located outside the device.

In the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.

In an embodiment of the present application, when the display panel changes direction, before transmitting image data to the video memory, the original image is first subjected to the same direction change, and then the image data after the direction change is transmitted to the video memory, so that the direction in which the image data is written to the video memory is the same as the direction in which the image data is read, thereby solving the problem of image fragmentation when the screen is refreshed due to screen rotation.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1A is a schematic diagram of a display effect provided by an embodiment of the present application;

FIG1B is a schematic diagram of a display effect provided by an embodiment of the present application;

FIG2 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

FIG3A is a schematic diagram of a display effect provided by an embodiment of the present application;

FIG3B is a schematic diagram of a display effect provided by an embodiment of the present application;

FIG4 is a schematic diagram of a display effect provided by an embodiment of the present application;

FIG5 is a schematic diagram of a flow chart of a display method provided in an embodiment of the present application;

6A to 6H are schematic diagrams showing changes in the direction of an image provided by an embodiment of the present application;

7A to 7H are schematic diagrams showing changes in the direction of an image provided by an embodiment of the present application;

FIG8 is a schematic diagram of a flow chart of displaying image direction changes according to an embodiment of the present application;

9A to 9H are schematic diagrams showing changes in the direction of an image provided by an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

The terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

The "embodiment" mentioned in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that in the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and/or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character "/" generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

It should be noted that in this application, "indication" may include direct indication, indirect indication, explicit indication, and implicit indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

In the present application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. The information to be indicated can be sent together as a whole, or it can be divided into multiple sub-information and sent separately, and the sending period and/or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and/or sending time of these sub-information can be pre-defined, for example, pre-defined according to the protocol, or can be configured by the transmitting end device by sending configuration information to the receiving end device.

It should be noted that in this application, "send" can be understood as "output", and "receive" can be understood as "input". "Send information to A", where "to A" only indicates the direction of information transmission, A is the destination, and does not limit "sending information to A" to direct transmission on the air interface. "Sending information to A" includes sending information directly to A, and also includes sending information to A indirectly through a transmitter, so "sending information to A" can also be understood as "outputting information to A". Similarly, "receiving information from A" indicates that the source of the information is A, including receiving information directly from A, and also includes receiving information indirectly from A through a receiver, so "receiving information from A" can also be understood as "inputting information from A".

The present application provides a display method, which is applied to the field of image display technology, such as image display of thin film transistor-liquid crystal display (TFT-LCD). In order to more clearly describe the solution of the present application, some knowledge related to image display is first introduced below.

In the field of handheld terminal equipment, TFT-LCD is often used for image display, and the image is often displayed after being rotated. Currently, most common TFT-LCD driver chips have built-in hardware rotation function, which can rotate the screen by configuring other internal registers.

However, when the screen is rotated, the pixel data of the image is written into and read from the graphic random access memory (G-RAM) in inconsistent directions, resulting in a phenomenon of image fragmentation when the screen is refreshed.

Please refer to FIG. 1A , which is a schematic diagram of a display effect provided by an embodiment of the present application.

As shown in FIG1A , when the display panel is rotated 90° clockwise, a diagonally split screen is displayed when the screen is refreshed, and the display area is split into a yellow area, a yellow-blue gradient area, and a blue area along the dotted lines, arranged in sequence from the upper left area to the lower right area.

Please refer to FIG. 1B , FIG. 1A is a schematic diagram of a display effect provided by an embodiment of the present application.

As shown in FIG1B , when the display panel is rotated 180° clockwise, a vertically split screen is displayed when the screen is refreshed. As shown in (1) in FIG1B , the display area is split along the dotted line into a yellow area and a blue area, which are arranged in sequence from top to bottom; as shown in (2) in FIG1B , the display area is split along the dotted line into a yellow area and a blue area, which are arranged in sequence from top to bottom.

The above-mentioned screen rotation causes the screen to be fragmented when refreshing the picture, which can only be improved in some main control chip products that support hardware controllers to rotate images, such as main control chips that support image signal processors (ISPs). However, not all main control chips have such controllers. Therefore, how to solve the problem of screen fragmentation when refreshing the picture caused by screen rotation has become a key research topic.

Please refer to FIG. 2 , which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application.

As shown in FIG2 , the communication system includes a host chip (Host) and a display screen.

Among them, the main control chip (Host) includes RAM, the display screen includes G-RAM and a display panel (Panel), and the display screen can specifically be TFT-LCD, which is not limited in the embodiment of the present application.

G-RAM is used to cache image data transmitted from the host chip (Host) through the serial/parallel port, and the controller continuously and cyclically reads image data from G-RAM in the form of image stream or video stream and refreshes it to the display panel for display.

Although the TFT-LCD driver chip itself has a hardware rotation function, the writing and reading directions of the G-RAM inside the screen are inconsistent after rotation, resulting in obvious vertical or diagonal split images on the screen.

Please refer to FIG. 3A , which is a schematic diagram of a display effect provided by an embodiment of the present application.

As shown in Figure 3A, it is a schematic diagram of the difference in the writing and fetching directions of the G-RAM inside the screen driver chip when rotated 90 degrees. The solid arrow in Figure 3A is the direction in which the image data is written into the GRAM, and the dotted arrow in Figure 3A is the direction in which the image data is fetched from the GRAM. Since the writing and fetching directions are perpendicular to each other, the screen will be split diagonally when the screen is refreshed.

Please refer to FIG. 3B , which is a schematic diagram of a display effect provided by an embodiment of the present application.

As shown in FIG3B , it is a schematic diagram of the difference in the writing and fetching directions of the G-RAM inside the screen driver chip when it is rotated 180°. The solid arrow in FIG3B is the direction in which the image data is written into the GRAM, and the dotted arrow in FIG3B is the direction in which the image data is fetched from the GRAM. Since the writing and fetching directions are opposite in the vertical direction, the G-RAM reads the image data from top to bottom, and the new image data is updated from bottom to top, and the writing operation and the fetching operation are close to each other. At a certain moment, these two operations will overlap, forming a vertically split screen, resulting in the phenomenon of vertical screen splitting when the screen is refreshed.

In order to solve the problem of screen tearing when refreshing the screen due to screen rotation, it is necessary to ensure that the writing and reading directions of the image data in the G-RAM are consistent. This can be done from the host chip side, where the image data is first rotated and then transferred to the G-RAM of the TFT-LCD.

Please refer to FIG. 4 , which is a schematic diagram of a display effect provided in an embodiment of the present application.

As shown in Figure 4, when rotating 90°, the main control chip first rotates the image data and then transmits it to the G-RAM of the TFT-LCD. The solid arrow in Figure 4 is the direction in which the image data is written into the GRAM, and the dotted arrow in Figure 4 is the direction in which the image data is taken out of the GRAM. Since the image data writing and reading directions of the G-RAM are consistent (both are from top to bottom), there will be no fragmentation when the screen is refreshed.

It is understandable that in order to ensure that there is no fragmentation when the screen is refreshed, it is also necessary to enable the frame synchronization function and ensure that the storage rate of the G-RAM is greater than the retrieval rate.

It is understandable that the display method shown in FIG4 can be implemented in the following two solutions, including but not limited to:

One is that the main control chip has an LCD controller, ISP controller, etc. with image rotation function, which can be handed over to the hardware controller to realize the "hard" rotation of the image, and then the rotated data is transmitted to the TFT-LCD;

The other is suitable for the main control chip without image rotation function, which uses software algorithm to perform "soft" rotation on the image and then transmits the rotated data to the TFT-LCD.

Accordingly, an embodiment of the present application provides a display method, which is described below in conjunction with FIG. 5 .

Please refer to FIG. 5 , which is a flow chart of a display method provided in an embodiment of the present application. The display method is applied to the field of image display technology, such as image display of TFT-LCD. The display method is applied to a display system, which includes a host, a display driver chip and a screen that are sequentially connected in communication. The display method includes but is not limited to the following steps:

S501: When a first change occurs in the direction of the screen, the host obtains a first conversion function corresponding to the first change, and converts the original image according to the first conversion function to obtain a target image.

S502: The host writes the target image into the image display memory of the display driver chip.

S503: The display driver chip reads the target image from the image display memory and displays it on the screen.

It is understood that the display driver chip in the embodiment of the present application is a processor/chip that can be used to execute computer execution instructions, and the embodiment of the present application is not limited to this. Optionally, the display driver chip can specifically include the G-RAM in Figure 2 above, which is used to participate in the execution of the display method in the embodiment of the present application to solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

It is understood that the host in the embodiment of the present application is a device equipped with a processor/chip that can be used to execute computer-executable instructions, and can also be a processor/chip that can be used to execute computer-executable instructions, and the embodiment of the present application does not limit this. Optionally, the host can be the main control chip (Host) in Figure 2 above, which is used to execute the display method in the embodiment of the present application to solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

In the embodiment of the present application, since the direction change of the original image is the same as the direction change of the screen, the direction in which the target image is written to the image display memory of the display driver chip is also the same as the direction in which the target image is read from the image display memory. Therefore, even if the direction of the screen changes, there will no longer be a phenomenon of screen fragmentation when the screen is refreshed, which can solve the problem of screen fragmentation when the screen is refreshed due to screen rotation.

It is understandable that for a TFT-LCD screen, the basic functions that the software needs to implement are driving functions such as drawing dots, lines, windows (such as rectangles and other graphics), and transmitting patterns, while the direction change function (such as rotation, mirroring, etc.) is nested into these functions to achieve the principle of "direction change first, then transmission".

In this way, on top of the original function of drawing points, lines, windows (rectangles), and patterns, operations of direction change (rotation, mirroring, etc.) of coordinate points, line segment endpoints, pattern windows (rectangles), pattern data, etc. are added, thereby realizing new functions of drawing points, lines, windows (rectangles), and patterns with software direction change (rotation, mirroring, etc.) functions.

The following will take the clockwise rotation of coordinate points, line segments, windows (rectangles) and patterns by 90°, 180°, 270°, and vertical mirroring and rotation of 90°, 180°, 270° after mirroring as examples to explain in detail the implementation principle of changing the original image into the target image.

Embodiment 1: Direction change of coordinate points.

If the original image is a coordinate point, the first change is a 90° clockwise rotation, and the first conversion function corresponds to x ₁ =y ₂ , y ₁ =lcd_h-1-x ₂ ;

Alternatively, the first change is a clockwise rotation of 180°, and the first conversion function corresponds to x ₁ = lcd_w-1-x ₂ , y ₁ = lcd_h-1-y ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = x ₂ ;

Alternatively, the first change is a mirror image, and the first transfer function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-1-y ₂ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = y ₂ ;

Alternatively, the first change is a mirror image and rotated 270° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = lcd_h-1-x ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point in the original image, _y1 is the vertical coordinate of the first coordinate point in the original image, _x2 is the horizontal coordinate of the second coordinate point in the target image, _y2 is the vertical coordinate of the second coordinate point in the target image, lcd_w is the width of the screen resolution, lcd_h is the height of the screen resolution, and the second coordinate point is the coordinate point corresponding to the first coordinate point after the first change.

In an embodiment of the present application, if the original image is a coordinate point, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between the coordinate point in the original image (i.e., the first coordinate point) and the coordinate point in the target image (i.e., the second coordinate point), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no longer a phenomenon of screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

Optionally, the specific implementation method may be as follows:

Obtaining a first coordinate point in the original image and a second coordinate point in the target image, where the second coordinate point is a coordinate point corresponding to the first coordinate point after the direction of the original image changes;

Based on the first coordinate point and the second coordinate point, a coordinate conversion relationship is determined.

It is understandable that, according to the change in the direction of the screen, the coordinate points on the original image are changed in the same direction to obtain the corresponding coordinate points on the target image, and the coordinate conversion relationship is determined based on the coordinate points before and after the direction change. For example, the first coordinate point in the original image is obtained, and the corresponding second coordinate point in the target image obtained after the first coordinate point changes with the original image, and the coordinate conversion relationship is determined based on the first coordinate point and the second coordinate point. Through the embodiment of the present application, the image data corresponding to the target image can be determined.

It can be understood that the rotation of coordinate points can be regarded as rotating a screen by 90°. To know the position of a point on the screen, the position of the point on the screen when it is originally placed without rotation can be first obtained, that is, from the coordinates of the point on the target screen (x ₂ , y ₂ ), the coordinates of the corresponding point on the original screen (x ₁ , y ₁ ) can be obtained. Knowing the corresponding relationship, the rotation algorithm of the coordinate points can be obtained.

The direction change of the coordinate points is further described below in conjunction with Table 1 and FIGS. 6A to 6H .

Among them, (x ₂ , y ₂ ) is the coordinate point passed into the new drawing function after the screen is rotated, the coordinate of the original drawing function actually written into the corresponding function is (x ₁ , y ₁ ), and lcd_w and lcd_h are the width and height of the TFT-LCD resolution.

Table 1

Embodiment 2: Direction change of a line segment.

If the original image is a line segment, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =lcd_h-1-x ₂ ;

Alternatively, the first change is a 180° clockwise rotation, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = lcd_h-1-y ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = x ₂ ;

Alternatively, the first change is a mirror image, and the first transfer function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-1-y ₂ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-x ₂ , y ₁ = y ₂ ;

Alternatively, the first change is a mirror image and rotated 270° clockwise, and the first conversion function corresponds to: x ₁ = lcd_w-1-y ₂ , y ₁ = lcd_h-1-x ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point on the first line segment in the original image, _y1 is the vertical coordinate of the first coordinate point on the first line segment in the original image, _x2 is the horizontal coordinate of the second coordinate point on the second line segment in the target image, _y2 is the vertical coordinate of the second coordinate point on the second line segment in the target image, lcd_w is the width of the screen resolution, lcd_h is the height of the screen resolution, the second line segment is the line segment corresponding to the first line segment after the first change, and the second coordinate point on the second line segment is the coordinate point corresponding to the first coordinate point on the first line segment after the first change.

In an embodiment of the present application, if the original image is a line segment, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between the coordinate point of the line segment in the original image (i.e., the first coordinate point on the first line segment) and the coordinate point of the line segment in the target image (i.e., the second coordinate point on the second line segment), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

Optionally, the specific implementation method may be as follows:

Obtaining the endpoint coordinates of the first line segment in the original image and the endpoint coordinates of the second line segment in the target image, where the second line segment is the line segment corresponding to the first line segment after the direction of the original image changes;

Based on the endpoint coordinates of the first line segment and the endpoint coordinates of the second line segment, a coordinate conversion relationship is determined.

It is understandable that, according to the change in the direction of the screen, the line segments on the original image are changed in the same direction to obtain the corresponding line segments on the target image, and the coordinate conversion relationship is determined based on the line segments before and after the direction change. For example, the endpoint coordinates of the first line segment in the original image are obtained, and the endpoint coordinates of the first line segment are obtained after the original image undergoes a direction change, and the corresponding endpoint coordinates of the second line segment in the target image are obtained, and the coordinate conversion relationship is determined based on the endpoint coordinates of the first line segment and the endpoint coordinates of the second line segment. Through the embodiment of the present application, the image data corresponding to the target image can be determined.

It is understandable that the rotation of the line segment can be converted into the rotation of the two starting/ending coordinate points. The coordinate points can be directly rotated to obtain the coordinate point ( _xs2 , _ys2 ) after the rotation of the starting coordinate point ( _xs1 , _ys1 ) of the line segment, and the coordinate point ( _xe2 , _ye2 ) after the rotation of the ending coordinate point ( _xe1 , _ye1 ). Since only the coordinate points are rotated, the method principle is consistent with that described in the first embodiment, so it will not be repeated here.

Embodiment 3: Change of direction of the window (rectangle).

If the original image is a rectangular window, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =lcd_h-x ₂ -w ₂ , w ₁ =h ₂ , h ₁ =w ₂ ;

Alternatively, the first change is a 180° clockwise rotation, and the first conversion function corresponds to: x ₁ = lcd_w - x ₂ - w ₂ , y ₁ = lcd_h - y ₂ - h ₂ , w ₁ = w ₂ , h ₁ = h ₂ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₁ = lcd_w - y ₂ - h ₂ , y ₁ = x ₂ , w ₁ = h ₂ , h ₁ = w ₂ ;

Alternatively, the first change is a mirror image, and the first transfer function corresponds to: x ₁ =x ₂ , y ₁ =lcd_h-y ₂ -h ₂ , w ₁ =w ₂ , h ₁ =h ₂ ;

Alternatively, the first change is a mirror image and rotated 90° clockwise, and the first transfer function corresponds to: x ₁ = lcd_w-y ₂ -h ₂ , y ₁ = lcd_h-x ₂ -w ₂ , w ₁ = h ₂ , h ₁ = w ₂ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first transfer function corresponds to: x ₁ = lcd_w - x ₂ - w ₂ , y ₁ = y ₂ , w ₁ = w ₂ , h ₁ = h ₂ ;

Alternatively, the first change is a mirror image and rotated 270° clockwise, and the first conversion function corresponds to: x ₁ =y ₂ , y ₁ =x ₂ , w ₁ =h ₂ , h ₁ =w ₂ ;

Among them, _x1 is the horizontal coordinate of the first coordinate point on the first window in the original image, _y1 is the vertical coordinate of the first coordinate point on the first window in the original image, _x2 is the horizontal coordinate of the second coordinate point on the second window in the target image, _y2 is the vertical coordinate of the second coordinate point on the second window in the target image, _w1 is the width of the first window, _h1 is the height of the first window, _w2 is the width of the second window, _h2 is the height of the second window, lcd_w is the width of the screen resolution, lcd_h is the height of the screen resolution, the second window is the window corresponding to the first window after the first change, and the second coordinate point on the second window is the coordinate point corresponding to the first coordinate point on the first window after the first change.

In an embodiment of the present application, if the original image is a rectangular window, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between the coordinate point of the rectangular window in the original image (i.e., the first coordinate point on the first window) and the coordinate point of the rectangular window in the target image (i.e., the second coordinate point on the second window), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no longer a phenomenon of screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

Optionally, the specific implementation method may be as follows:

Obtaining the starting point coordinates and size information of the first window in the original image, and the starting point coordinates and size information of the second window in the target image, where the second window is the window corresponding to the first window after the direction of the original image changes;

A coordinate conversion relationship is determined based on the starting point coordinates and size information of the first window and the starting point coordinates and size information of the second window in the target image.

It is understandable that, according to the change in the direction of the screen, the window on the original image is changed in the same direction to obtain the corresponding window on the target image, and the coordinate conversion relationship is determined based on the window before and after the direction change. For example, the starting coordinate point and size information of the first window in the original image are obtained, and the starting coordinate point and size information of the first window are obtained along with the starting coordinate point and size information of the first window. The corresponding second window in the target image obtained after the direction change, and the coordinate conversion relationship is determined based on the starting coordinate point and size information of the first window and the starting coordinate point and size information of the second window. Through the embodiment of the present application, the image data corresponding to the target image can be determined.

It can be understood that the rotation of the TFT-LCD rectangle is the rotation of the window, which mainly involves the rotation of the starting coordinates and the width and height. After the screen is rotated and placed, the corresponding specified window position needs to be converted to the window position when it is not rotated, that is, the window position before rotation.

The change in direction of the line segment is further described below in conjunction with Table 2 and FIGS. 7A to 7H .

Among them, ( _x1 , _y1 ) is the starting coordinate point before rotation, _w1 and _h1 are the width and height before rotation, ( _x2 , _y2 ) is the starting coordinate point after rotation, _w2 and _h2 are the width and height after rotation; lcd_w and lcd_h are the width and height of the TFT-LCD resolution respectively.

Table 2

Embodiment 4: Direction change of an image.

If the original image is an irregular pattern, the first change is a 90° clockwise rotation, and the first conversion function corresponds to: x ₂ =h-1-y ₁ , y ₂ =x ₁ ;

Alternatively, the first change is a 180° clockwise rotation, and the first conversion function corresponds to: x ₂ =w-1-x ₁ , y ₂ =h-1-y ₁ ;

Alternatively, the first change is a clockwise rotation of 270°, and the first conversion function corresponds to: x ₂ =y ₁ , y ₂ =w-1-x ₁ ;

Alternatively, the first change is a mirror image, and the first conversion function corresponds to: x ₂ =x ₁ , y ₂ =h-1-y ₁ ;

Alternatively, the first change is a mirror image and a 90° clockwise rotation, and the first conversion function corresponds to: x ₂ =y ₁ , y ₂ =x ₁ ;

Alternatively, the first change is a mirror image and rotated 180° clockwise, and the first conversion function corresponds to: x ₂ =w-1-x ₁ , y ₂ =y ₁ ;

Alternatively, the first change is a mirror image and rotated 270° clockwise, and the first conversion function corresponds to: x ₂ =h-1-y ₁ , y ₂ =w-1-x ₁ ;

Among them, _x1 is the horizontal coordinate of the first pixel point in the original image, _y1 is the vertical coordinate of the first pixel point in the original image, _x2 is the horizontal coordinate of the second pixel point in the target image, _y2 is the vertical coordinate of the second pixel point in the target image, w is the width of the original image, h is the height of the original image, and the second pixel point is the pixel point corresponding to the first pixel point after the first change.

In an embodiment of the present application, if the original image is an irregular pattern, when the direction of the screen undergoes a first change, no matter what the specific situation of the first change is (for example, clockwise rotation of 90°, clockwise rotation of 180°, clockwise rotation of 270°, mirroring, mirroring and clockwise rotation of 90°, mirroring and clockwise rotation of 180°, mirroring and clockwise rotation of 270°, etc.), there is a first conversion function corresponding to the first change, and the first conversion function is a conversion relationship between a pixel point in the original image (i.e., a first pixel point) and a pixel point in the target image (i.e., a second pixel point), so that the original image is converted according to the first conversion function according to the first conversion function to obtain the target image, so that the direction in which the target image is written to the image display memory of the display driver chip is the same as the direction in which it is read, and even if the direction of the screen changes, there is no longer a phenomenon of screen fragmentation when the screen is refreshed, thereby solving the problem of screen fragmentation when the screen is refreshed due to screen rotation.

Optionally, the specific implementation method may be as follows:

Obtain a first pixel point in the original image and a second pixel point in the target image, where the second pixel point is a pixel point corresponding to the first pixel point after the direction of the original image changes;

A coordinate transformation relationship is determined based on the first pixel point and the second pixel point.

It is understandable that, according to the change in the direction of the screen, the pixel points on the original image are changed in the same direction to obtain the corresponding pixel points on the target image, and the coordinate transformation relationship is determined based on the pixel points before and after the direction change. For example, the first pixel point in the original image is obtained, and the corresponding second pixel point in the target image obtained after the first pixel point changes with the original image is obtained, and the coordinate transformation relationship is determined based on the first pixel point and the second pixel point. Through the embodiment of the present application, the image data corresponding to the target image can be determined.

It can be understood that the rotation of the pattern is just the rotation of all the pixels of the pattern according to the length and height of the pattern itself, which has nothing to do with the screen. The corresponding relationship between the rotated pattern and the pattern before the rotation can be directly obtained.

First, the coordinates of a pixel in the original pattern are calculated to correspond to the coordinates of the pixel after the pattern is rotated, so that the correspondence between the pixels before and after the rotation can be obtained. After that, all the pixels of the original pattern are converted one by one to obtain the new pattern after the rotation.

Please refer to FIG. 8 for details, which is a schematic diagram of a flow chart of displaying image direction changes provided in an embodiment of the present application.

As shown in Figure 8, it is the rotation algorithm of the image. First, the starting coordinates of the image are set to (0, 0). When the ordinate is not less than the image height, it means that all the pixels of the entire image have been converted. When the ordinate is less than the image height, the horizontal coordinate x is made to start from 0 and traverse the pixels one by one for conversion. When the horizontal coordinate x is not less than the image width, the ordinate is increased by 1, and the horizontal coordinate x is made to start from 0 and traverse the pixels one by one for conversion again, until the pixels of the entire image are traversed and converted, and the new pattern after rotation can be obtained.

The following further describes the change in the direction of the image in conjunction with Table 3 and FIGS. 9A to 9H .

The corresponding relationship between the coordinates (x ₂ , y ₂ ) of a pixel point in the rotated new image and the coordinates (x ₁ , y ₁ ) before rotation is shown in Table 3 below, where w and h are the width and height of the image, respectively.

Table 3

It should be understood that the above-mentioned embodiments 1 to 4, as well as Tables 1 to 3, are merely illustrations of several possible embodiments and should not be used to limit the embodiments of the present application. Embodiments obtained by reasonable deformation or supplementation based on the above-mentioned embodiments and directional changes all fall within the scope of protection of the embodiments of the present application.

According to the method provided in an embodiment of the present application, an embodiment of the present application also provides an electronic device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the method shown in Figure 5 when executing the computer program.

According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program runs on one or more processors, the method shown in Figure 5 can be implemented.

According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a computer program product, and the above-mentioned computer program product includes a computer program. When the above-mentioned computer program runs on a processor, the method shown in the above-mentioned Figure 5 can be implemented.

The embodiment of the present application also provides a display system, which includes: a host, a display driver chip and a screen that are communicatively connected in sequence;

When the direction of the screen undergoes a first change, the host is used to obtain a first conversion function corresponding to the first change, and convert the original image according to the first conversion function to obtain a target image;

The host is also used to write the target image into the image display memory of the display driver chip;

The display driver chip is used to read the target image from the image display memory and display it on the screen;

The screen is used to display the target image.

Optionally, the first change and its corresponding first conversion function may be implemented as in any of the embodiments in FIG. 5 , which will not be described in detail here.

A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by hardware related to a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned method embodiments. The aforementioned storage medium includes: a read-only memory ROM or a random access memory RAM, a magnetic disk or an optical disk, and other media that can store computer program codes.

Claims (8)

1. The display method is characterized by applying a display system, wherein the display system comprises a host, a display driving chip and a screen which are sequentially in communication connection, and the display method comprises the following steps:

when the direction of the screen is changed for the first time, the host acquires a first conversion function corresponding to the first change, and converts an original image according to the first conversion function to obtain a target image;

The host writes the target image into an image display memory of the display driving chip;

and the display driving chip reads the target image of the image display memory and displays the target image through the screen.

2. The method of claim 1, wherein if the original image is a coordinate point, the first transformation is rotated 90 ° clockwise, and the first transformation function corresponds to x ₁ ＝y ₂ ，y ₁ ＝lcd_h-1-x ₂ ；

Alternatively, the first transformation is rotated 180 ° clockwise, and the first transformation function corresponds to x ₁ ＝lcd_w-1-x ₂ ，y ₁ ＝lcd_h-1-y ₂ ；

Alternatively, the first variation is a 270 ° clockwise rotation, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-y ₂ ，y ₁ ＝x ₂ ；

Alternatively, the first change is a mirror image, the first rotationThe trade function corresponds to: x is x ₁ ＝x ₂ ，y ₁ ＝lcd_h-1-y ₂ ；

Alternatively, the first variation is mirrored and rotated 90 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝y ₂ ，y ₁ ＝x ₂ ；

Alternatively, the first variation is mirrored and rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-x ₂ ，y ₁ ＝y ₂ ；

Alternatively, the first variation is mirrored and rotated 270 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-y ₂ ，y ₁ ＝lcd_h-1-x ₂ ；

Wherein said x ₁ The y is the abscissa of the first coordinate point in the original image ₁ The x is the ordinate of the first coordinate point in the original image ₂ The y is the abscissa of the second coordinate point in the target image ₂ And taking the lcd_w as the ordinate of a second coordinate point in the target image, wherein lcd_w is the width of the resolution of the screen, lcd_h is the height of the resolution of the screen, and the second coordinate point is the coordinate point corresponding to the first coordinate point after the first change.

3. The method of claim 1, wherein if the original image is a line segment, the first transformation is rotated 90 ° clockwise, and the first transformation function corresponds to: x is x ₁ ＝y ₂ ，y ₁ ＝lcd_h-1-x ₂ ；

Alternatively, the first variation is rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-x ₂ ，y ₁ ＝lcd_h-1-y ₂ ；

Alternatively, the first variation is a 270 ° clockwise rotation, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-y ₂ ，y ₁ ＝x ₂ ；

Alternatively, the first variation is a mirror image, the firstThe transfer function corresponds to: x is x ₁ ＝x ₂ ，y ₁ ＝lcd_h-1-y ₂ ；

Alternatively, the first variation is mirrored and rotated 90 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝y ₂ ，y ₁ ＝x ₂ ；

Alternatively, the first variation is mirrored and rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-x ₂ ，y ₁ ＝y ₂ ；

Alternatively, the first variation is mirrored and rotated 270 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-1-y ₂ ，y ₁ ＝lcd_h-1-x ₂ ；

Wherein said x ₁ Is the abscissa of the first coordinate point on the first line segment in the original image, the y ₁ Is the ordinate of a first coordinate point on a first line segment in the original image, the x ₂ Is the abscissa of a second coordinate point on a second line segment in the target image, the y ₂ And the lcd_w is the width of the resolution of the screen, the lcd_h is the high of the resolution of the screen, the second line segment is the line segment corresponding to the first line segment after the first change, and the second coordinate point on the second line segment is the coordinate point corresponding to the first coordinate point on the first line segment after the first change.

4. The method of claim 1, wherein if the original image is a rectangular window, the first transformation is rotated 90 ° clockwise, and the first transformation function corresponds to: x is x ₁ ＝y ₂ ，y ₁ ＝lcd_h-x ₂ -w ₂ ，w ₁ ＝h ₂ ，h ₁ ＝w ₂ ；

Alternatively, the first variation is rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-x ₂ -w ₂ ，y ₁ ＝lcd_h-y ₂ -h ₂ ，w ₁ ＝w ₂ ，h ₁ ＝h ₂ ；

Alternatively, the first variation is a 270 ° clockwise rotation, the first transfer function corresponding to: x is x ₁ ＝lcd_w-y ₂ -h ₂ ，y ₁ ＝x ₂ ，w ₁ ＝h ₂ ，h ₁ ＝w ₂ ；

Alternatively, the first change is a mirror image, the first transfer function corresponding to: x is x ₁ ＝x ₂ ，y ₁ ＝lcd_h-y ₂ -h ₂ ，w ₁ ＝w ₂ ，h ₁ ＝h ₂ ；

Alternatively, the first variation is mirrored and rotated 90 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-y ₂ -h ₂ ，y ₁ ＝lcd_h-x ₂ -w ₂ ，w ₁ ＝h ₂ ，h ₁ ＝w ₂ ；

Alternatively, the first variation is mirrored and rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝lcd_w-x ₂ -w ₂ ，y ₁ ＝y ₂ ，w ₁ ＝w ₂ ，h ₁ ＝h ₂ ；

Alternatively, the first variation is mirrored and rotated 270 ° clockwise, the first transfer function corresponding to: x is x ₁ ＝y ₂ ，y ₁ ＝x ₂ ，w ₁ ＝h ₂ ，h ₁ ＝w ₂ ；

Wherein said x ₁ The y is the abscissa of the first coordinate point on the first window in the original image ₁ The x is the ordinate of the first coordinate point on the first window in the original image ₂ Is the abscissa of a second coordinate point on a second window in the target image, the y ₂ The w is the ordinate of a second coordinate point on a second window in the target image ₁ For the width of the first window, the h ₁ For the height of the first window, the w ₂ For the width of the second window, the h ₂ Is the firstAnd the second window is a window corresponding to the first window after the first change, and the second coordinate point on the second window is a coordinate point corresponding to the first coordinate point on the first window after the first change.

5. The method of claim 1, wherein if the original image is an irregular pattern, the first transformation is rotated 90 ° clockwise, and the first transformation function corresponds to: x is x ₂ ＝h-1-y ₁ ，y ₂ ＝x ₁ ；

Alternatively, the first variation is rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₂ ＝w-1-x ₁ ，y ₂ ＝h-1-y ₁ ；

Alternatively, the first variation is a 270 ° clockwise rotation, the first transfer function corresponding to: x is x ₂ ＝y ₁ ，y ₂ ＝w-1-x ₁ ；

Alternatively, the first change is a mirror image, the first transfer function corresponding to: x is x ₂ ＝x ₁ ，y ₂ ＝h-1-y ₁ ；

Alternatively, the first variation is mirrored and rotated 90 ° clockwise, the first transfer function corresponding to: x is x ₂ ＝y ₁ ，y ₂ ＝x ₁ ；

Alternatively, the first variation is mirrored and rotated 180 ° clockwise, the first transfer function corresponding to: x is x ₂ ＝w-1-x ₁ ，y ₂ ＝y ₁ ；

Alternatively, the first variation is mirrored and rotated 270 ° clockwise, the first transfer function corresponding to: x is x ₂ ＝h-1-y ₁ ，y ₂ ＝w-1-x ₁ ；

Wherein said x ₁ The y is the abscissa of the first pixel point in the original image ₁ The x is the ordinate of the first pixel point in the original image ₂ For the object ofThe abscissa of the second pixel point in the image, said y ₂ And the second pixel point is a pixel point corresponding to the first pixel point after the first change.

6. An electronic device comprising a memory storing a computer program and a processor implementing the method of any one of claims 1 to 5 when the computer program is executed by the processor.

7. A computer readable storage medium for storing instructions or a computer program; the method of any of claims 1 to 5 is implemented when said instructions or said computer program are executed.

8. A display system, comprising: the host, the display driving chip and the screen are sequentially connected in a communication way;

when the direction of the screen is changed for the first time, the host is used for acquiring a first conversion function corresponding to the first change, and converting an original image according to the first conversion function to obtain a target image;

the host is also used for writing the target image into an image display memory of the display driving chip;

the display driving chip is used for reading the target image of the image display memory and displaying the target image through the screen;

the screen is used for displaying the target image.