CN117872822A - Display circuit and data transmission method - Google Patents

Display circuit and data transmission method Download PDF

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Publication number
CN117872822A
CN117872822A CN202211246326.3A CN202211246326A CN117872822A CN 117872822 A CN117872822 A CN 117872822A CN 202211246326 A CN202211246326 A CN 202211246326A CN 117872822 A CN117872822 A CN 117872822A
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data
display
displayed
compressed data
chip
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颜建清
张璐
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202211246326.3A priority Critical patent/CN117872822A/en
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Abstract

The application provides a display circuit and a data transmission method, relates to the technical field of communication, and is used for reducing power consumption of the display circuit. The display circuit is applied to electronic equipment, and comprises: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface; the application chip is used for acquiring data to be displayed, compressing the data to be displayed and obtaining compressed data; the application chip is also used for carrying out display processing on the compressed data to obtain compressed data, and sending the compressed data to the display driving chip through the display interface; the display driving chip is used for receiving the compression processing data and decompressing the compression processing data to obtain display data.

Description

Display circuit and data transmission method
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a display circuit and a data transmission method.
Background
Currently, wearable mobile devices, such as smart watches and smart bracelets, have functions of displaying images and videos in addition to a function of indicating time. For example, a smart watch may include display circuitry, which may include: an application chip, a display interface, a Display Driver IC (DDIC) and a display screen. The application chip may include an image processing subsystem, a video memory (FB), and a display subsystem (display subsystem, DSS), and the display driver chip may include a compressor, an image memory (graphics random access memory, GRAM), and a decompressor. When the display screen needs to display, the image processing subsystem can be used for determining data to be displayed, storing the data to be displayed in the FB, acquiring the data to be displayed from the FB by the DSS, processing the data to be displayed, and transmitting the processed data to the DDIC through the display interface, for example, the DSS can be used for changing the format or the type of the data to be displayed, a compressor in the DDIC receives and compresses the processed data to be displayed to obtain compressed data, storing the compressed data in the GRAM, and a decompressor acquires the compressed data from the GRAM, decompresses the compressed data and then sends the compressed data to the display screen for display. The size of the data to be displayed is related to the resolution and format of the data to be displayed, for example, when the resolution of the data to be displayed is 500×500 and the format is RGB888, the size of the data to be displayed is 732 Kilobytes (KB), and in practical applications, the user wants the higher the resolution of the data to be displayed, the higher the resolution, and the larger the data to be displayed.
However, since the data to be displayed is larger, when the data to be displayed is stored in the FB, a larger storage space is occupied, the area of the display circuit is increased, and when the display circuit is applied to the intelligent watch, the area of the intelligent watch is increased; on the other hand, in the case that the display interface supports small bandwidth transmission, the transmission time of the data to be displayed is long, and the power consumption consumed in the transmission process is large. Accordingly, there is a need for a display circuit for reducing power consumption of the display circuit while reducing the area of the display circuit.
Disclosure of Invention
The application provides a display circuit and a data transmission method, which are used for reducing the power consumption of the display circuit.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
in a first aspect, a display circuit is provided, the display circuit being applied to an electronic device, the display circuit comprising: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface; the application chip is used for acquiring data to be displayed, compressing the data to be displayed and obtaining compressed data; the application chip is also used for carrying out display processing on the compressed data to obtain compressed data, and sending the compressed data to the display driving chip through the display interface; the display driving chip is used for receiving the compression processing data and decompressing the compression processing data to obtain display data.
In the technical scheme, the application chip sends the compressed data to the display driving chip through the display interface, namely the application chip sends the compressed data to the display driving chip through the display interface, so that the data quantity is reduced on the premise of not losing the data, and compared with the case that the application chip directly sends the data to be displayed through the display interface, the time for data transmission is shortened, the power consumption in the transmission process is reduced, and the power consumption of a display circuit is reduced; on the other hand, the data to be displayed is compressed and decompressed only once, so that the quality of the display data is ensured, and when the display screen displays the display data in the form of an image, the quality of the image is ensured.
In a possible implementation manner of the first aspect, the application chip includes: an image processing subsystem, a compressor, a frame buffer and a display subsystem; the image processing subsystem is used for acquiring data to be displayed; the compressor is configured to compress the data to be displayed, for example, the compressor may be configured to compress the data to be displayed according to a corresponding protocol to obtain the compressed data; the frame buffer is used for storing the compressed data; the display subsystem is used for carrying out to-be-displayed processing on the compressed data to obtain the compressed data, and sending the compressed data to the display driving chip through the display interface. In the possible implementation manner, the compressor compresses the data to be displayed, the data quantity is reduced on the premise of not losing the data, the data stored in the frame buffer is the compressed data, and the storage space occupied by the compressed data is reduced, so that the area of a display circuit is reduced; on the other hand, the display subsystem sends the compressed data to the display driving chip through the display interface, and compared with the direct sending of the data to be displayed, the time of data transmission is shortened, and the power consumption in the transmission process is reduced, so that the power consumption of a display circuit is reduced.
In a possible implementation manner of the first aspect, the image processing subsystem includes a synthesizer and at least one of: an image decoder, a graphics processor, and a central processing unit. In the possible implementation manner, the selectivity of determining the data to be displayed is increased.
In a possible implementation manner of the first aspect, the display driving chip includes: an image memory and a decompressor; the image memory is used for receiving the compression processing data and storing the compression processing data; the decompressor is used for decompressing the compression processing data to obtain display data. In the possible implementation manner, the decompressor decompresses the compressed data, so that normal display of the subsequent display screen is ensured.
In a possible implementation manner of the first aspect, the display circuit further includes a display screen connected to the display driving chip, where the display screen is configured to receive and display the display data, for example, the display screen may be configured to display the display data in a form of an image. In the above possible implementation manner, the data to be displayed passes through the application chip and the display driving chip until being compressed once and decompressed once in the process of displaying on the display screen, so that the quality of the display data displayed on the display screen is ensured, namely the quality of the image is ensured.
In a possible implementation manner of the first aspect, the display interface includes: mobile industry processor interface MIPI or high definition multimedia interface HDMI. In the possible implementation manner, the audio and video data can be transmitted through the display interface, so that the installation difficulty of the circuit of the display circuit is reduced.
In a possible implementation manner of the first aspect, the electronic device is a wearable device. In the possible implementation manner, the requirements of users on small area and low power consumption of the electronic equipment are met.
In a second aspect, a data transmission method is provided, where the method is applied to a display circuit, and the display circuit includes: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface, and the method comprises the following steps: the application chip acquires data to be displayed, and compresses the data to be displayed to obtain compressed data; the application chip performs display processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface; the display driving chip receives the compressed data and decompresses the compressed data to obtain display data.
In a possible implementation manner of the second aspect, the application chip includes: the application chip acquires data to be displayed, compresses the data to be displayed to obtain compressed data, and comprises: the image processing subsystem acquires data to be displayed; the compressor compresses the data to be displayed to obtain compressed data; the application chip performs to-be-displayed processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface, including: the frame buffer stores the compressed data; the display subsystem performs display processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface.
In a possible implementation manner of the second aspect, the display driving chip includes: an image memory and a decompressor, the display driving chip receiving the compressed data and decompressing the compressed data to obtain display data, comprising: the image memory receives and stores the compression processing data; the decompressor decompresses the compressed data to obtain display data.
In a possible implementation manner of the second aspect, the display circuit further includes a display screen connected to the display driving chip, and the method further includes: the display data is received and displayed.
In a possible implementation manner of the second aspect, the display interface includes: mobile industry processor interface MIPI or high definition multimedia interface HDMI.
In a third aspect, an electronic device is provided, the electronic device comprising a display circuit, the display circuit being provided as described above or any one of the possible implementations of the first aspect.
In yet another aspect of the present application, there is provided a computer readable storage medium comprising computer instructions which, when run in a display circuit, cause the display circuit to perform a data transmission method as provided by the second aspect or any one of the possible implementations of the second aspect.
In a further aspect of the application, there is provided a computer program product comprising instructions which, when run on a computer device, cause a display circuit to perform the method of data transmission provided by the second aspect or any one of the possible implementations of the second aspect.
It will be appreciated that the data transmission method, the electronic device, the computer readable storage medium and the computer program product provided above all include the content of the display circuit provided above, and therefore, the advantages achieved by the method and the electronic device can refer to the advantages in the chip system provided above, and are not repeated herein.
Drawings
FIG. 1 is a schematic diagram of a display circuit;
FIG. 2 is a schematic diagram of another display circuit;
FIG. 3 is a schematic diagram of a display circuit;
FIG. 4 is a schematic diagram of another display circuit;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display circuit according to an embodiment of the present application;
fig. 7 is a flow chart of a data transmission method according to an embodiment of the present application.
Detailed Description
In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a. b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural. In addition, the embodiments of the present application use the words "first," "second," etc. to distinguish between the same item or similar items that have substantially the same function and effect. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not limited in order. Those skilled in the art will appreciate that the words "first," "second," and the like do not limit the number and order of execution.
In this application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Currently, wearable mobile devices, such as smart watches and smart bracelets, have functions of displaying images and videos in addition to a function of indicating time. For example, a smart watch may include display circuitry, which may include: an application chip, a display interface, a Display Driver IC (DDIC) and a display screen. The application chip may include an image processing subsystem, a video memory (FB), and a display subsystem (display subsystem, DSS), and the display driver chip may include a compressor, an image memory (graphics random access memory, GRAM), and a decompressor. When the display screen needs to display, the image processing subsystem can be used for determining data to be displayed, storing the data to be displayed in the FB, acquiring the data to be displayed from the FB by the DSS, processing the data to be displayed, and transmitting the processed data to the DDIC through the display interface, for example, the DSS can be used for changing the format or the type of the data to be displayed, a compressor in the DDIC receives and compresses the processed data to be displayed to obtain compressed data, storing the compressed data in the GRAM, and a decompressor acquires the compressed data from the GRAM, decompresses the compressed data and then sends the compressed data to the display screen for display. The size of the data to be displayed is related to the resolution and format of the data to be displayed, for example, when the resolution of the data to be displayed is 500×500 and the format is RGB888, the size of the data to be displayed is 732 Kilobytes (KB), and in practical applications, the user wants the higher the resolution of the data to be displayed, the higher the resolution, and the larger the data to be displayed.
However, since the data to be displayed is larger, when the data to be displayed is stored in the FB, a larger storage space is occupied, the area of the display circuit is increased, and when the display circuit is applied to the intelligent watch, the area of the intelligent watch is increased; on the other hand, in the case that the display interface supports small bandwidth transmission, the transmission time of the data to be displayed is long, and the power consumption consumed in the transmission process is large. Accordingly, there is a need for a display circuit for reducing power consumption of the display circuit while reducing the area of the display circuit. At present, data transmission and display are realized through the following four schemes.
Scheme one: fig. 1 is a schematic structural diagram of a display circuit, which includes: an application chip 10, a display interface 11, a Display Driver IC (DDIC) 12, and a display screen 13. Wherein the application chip 10 includes: an image processing subsystem 101, a Frame Buffer (FB) 102, and a display subsystem (display subsystem, DSS) 103. The image processing subsystem 101 may be used to determine data to be displayed, for example, the image processing subsystem 101 may include: an image decoder (image decoder) 01, a graphics processor (graphics processing unit, GPU) 02, a central processing unit (central processing unit, CPU) 03 and a synthesizer 04, wherein the image decoder 01 can be used for decoding an image to obtain first sub-data to be displayed, the GPU02 can be used for obtaining second sub-data to be displayed through rendering, the CPU03 can be used for obtaining third sub-data to be displayed through rendering, and the synthesizer 04 can be used for synthesizing the first sub-data to be displayed, the second sub-data to be displayed and the third sub-data to be displayed to obtain data to be displayed. FB102 may be used to store data to be displayed, and DSS103 may be used to obtain data to be displayed from FB102, process the data to be displayed, and transmit the processed data to DDIC12 through display interface 11. The DDIC12 may be configured to receive the data to be displayed, compress the data to be displayed, and store the compressed data, and when the display screen 13 needs to display the data, the DDIC12 may be configured to decompress the data to be displayed and send the decompressed data to the display screen 13 for display. For example, DDIC12 may include: a first compressor 121, an image memory (graphics random access memory, GRAM) 122, and a first decompressor 123. The compressor 121 may be configured to receive and compress data to be displayed according to a corresponding first compression protocol, obtain compressed data, the GRAM122 may be configured to store the compressed data, and the decompressor 123 may be configured to decompress the compressed data, obtain display data, and send the display data to the display screen 13.
However, in the scheme, the data to be displayed stored in the FB is data without compression, and the storage space occupied by the data to be displayed is large due to the fact that the data to be displayed is large, so that the area of a display circuit is increased, and when the display circuit is applied to the intelligent watch, the area of the intelligent watch is increased; on the other hand, the DSS transmits uncompressed data to the DDIC through the display interface, and in the case that the display interface supports small bandwidth transmission, the transmission time of the data to be displayed is long, and the power consumption consumed in the transmission process is large.
Scheme II: fig. 2 is a schematic diagram of another display circuit with the addition of the second compressor 104 of fig. 1. Specifically, a second compressor 104 is added after the DSS103, where the second compressor 104 may be configured to compress the data to be displayed after processing by the DSS103 according to a corresponding second compression protocol, to obtain compressed data, and transmit the compressed data to the DDIC12 through the display interface 11, and because the first decompressor 123 of the DDIC12 may directly decompress the compressed data compressed by the second compression protocol, the DDIC12 directly stores the received compressed data in the memory 122, and when the display screen 13 needs to display the data, the first decompressor 123 may be configured to decompress the compressed data according to a decompression protocol corresponding to the second compression protocol, to obtain the display data. In the display circuit shown in fig. 2, the first compressor 121 is not present. However, in this scheme, the data to be displayed stored in the FB is data that is not compressed, and because the data to be displayed is larger, the storage space occupied by the data to be displayed is larger, the area of the display circuit is increased, and when the display circuit is applied to the smart watch, the area of the smart watch is increased.
Scheme III: fig. 3 is a schematic diagram of a further display circuit, which is based on fig. 1, with the addition of a third compressor 105 and a second decompressor 106, wherein the second decompressor 106 is a decompressor in the DSS 103. Specifically, a third compressor 105 is added between the synthesizer 04 and the video memory 102, where the third compressor 105 may be configured to compress the data to be displayed output by the synthesizer 04 according to a third compression protocol corresponding to the third compressor 105, obtain compressed data, and store the compressed data in the FB102, and since the first decompressor 123 of the DDIC12 cannot decompress the compressed data compressed by the third compression protocol, the DSS103 may be configured to obtain the compressed data from the FB102 and process and decompress the compressed data (decompress the compressed data by using the second decompressor 106), where the DSS103 transmits the decompressed data to the DDIC12 through the display interface 11, and where the DDIC12 processes the data to be displayed by using a method similar to that in fig. 1. However, in this scheme, the DSS transmits uncompressed data to the DDIC12 through the display interface, and in the case that the display interface supports small bandwidth transmission, the transmission time of the data to be displayed is long, and the power consumption consumed in the transmission process is large; on the other hand, the data displayed on the display screen needs to be compressed twice and decompressed twice, so that the quality of the image is reduced.
Scheme IV: fig. 4 is a schematic diagram of another display circuit with the addition of the second compressor 104, the third compressor 105 and the second decompressor 106 based on fig. 1. Specifically, a third compressor 105 is added between the synthesizer 04 and the video memory 102, and a second compressor 104 is added after the DSS 103. The third compressor 105 may be configured to compress the data to be displayed output by the synthesizer 04 according to a third compression protocol, obtain compressed data, store the compressed data in the FB102, and the DSS103 may be configured to obtain the compressed data from the FB102, process and decompress the compressed data (decompress the compressed data by using the second decompressor 106), obtain the processed data to be displayed, where the second compressor 104 compresses the processed data to be displayed output by the DSS103 according to a corresponding second compression protocol, obtain the compressed data, and transmit the compressed data to the DDIC12 through the display interface 11, where the DDIC12 processes the compressed data by a similar method in fig. 2. In the display circuit shown in fig. 4, the first compressor 121 is not present. However, in this scheme, the data displayed on the display screen needs to be compressed twice and decompressed twice, degrading the quality of the image.
Based on the above, the embodiment of the application provides a display circuit and a data transmission method, where the display circuit is applied to an electronic device, and the electronic device may be an intelligent watch or an intelligent bracelet. The display circuit includes: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface; the application chip is used for acquiring data to be displayed, compressing the data to be displayed and obtaining compressed data; the application chip is also used for carrying out display processing on the compressed data to obtain compressed data, and sending the compressed data to the display driving chip through the display interface; the display driving chip is used for receiving the compression processing data and decompressing the compression processing data to obtain display data. In the process, the application chip sends the compressed data to the display driving chip through the display interface, namely the application chip sends the compressed data to the display driving chip through the display interface, the data quantity is reduced on the premise of not losing the data, and compared with the case that the application chip directly sends the data to be displayed through the display interface, the time for data transmission is shortened, the power consumption in the transmission process is reduced, and therefore the power consumption of a display circuit is reduced; on the other hand, the data to be displayed is compressed and decompressed only once, so that the quality of the display data is ensured, and when the display screen displays the display data in the form of an image, the quality of the image is ensured.
The structure of the electronic device will be described below.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where an example of the electronic device is a smart watch. As shown in fig. 5, the electronic device may include: memory 101, processor 102, sensor assembly 103, multimedia assembly 104, power source 105, and actuator 106.
The memory 101 may include an internal memory and an external memory, where the internal memory may be a memory and may be integrated with the processor 102. Memory 101 may be used to store data, software programs, and software modules; the device mainly comprises a storage program area and a storage data area, wherein the storage program area can store an operating system and application programs required by at least one function, such as a sound playing function or an image playing function; the storage data area may store data created according to the use of the electronic device, such as audio data, image data, or form data. In addition, the electronic device may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. In the embodiment of the present application, the memory 101 may include a Frame Buffer (FB) and an image memory (graphics random access memory, GRAM), where the frame buffer may also be referred to as a video memory. Wherein the GRAM is located in a display driver chip, and the FB is located in an Application Processor (AP).
The processor 102 is a control center of the electronic device, connects various parts of the entire device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or software modules stored in the memory 101, and calling data stored in the memory 101, thereby performing overall monitoring of the electronic device. Optionally, the processor 102 may include one or more processing units, for example, the processor 102 may include a central processing unit (central processing unit, CPU), an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video playback codec, a digital signal processor (digital signal processor, DSP), a baseband processor and/or a neural network processor (neural-networkprocessing unit, NPU), and the like. In an embodiment of the present application, the processor 102 may include an AP, where the AP may include a GPU and a CPU, where the GPU may be used to obtain data to be displayed through rendering, and the CPU may be used to obtain data to be displayed through rendering.
The sensor assembly 103 includes one or more sensors for providing status assessment of various aspects of the electronic device. The sensor assembly 103 may include a power consumption sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor, and power consumption, orientation, on/off state of the electronic device, relative positioning of the assembly, or temperature change of the electronic device may be detected by the sensor assembly 103. In addition, the sensor assembly 103 may further include a scene sensor for detecting an application scene of the electronic device, which may include, for example, a 2D dial, a time display, a sports health, an information display, a mobile payment, a mobile phone call, a video play, a music play, a 3D dial, or the like.
The multimedia component 104 provides a screen of an output interface between the electronic device and the user, which may be a touch panel, and when the screen is a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. The screen may also be a display screen to display data or information stored in the memory 101. In addition, the multimedia component 104 can also include audio and video. When the electronic equipment is in the video playing mode, the audio and video can support the electronic equipment to play videos, and when the electronic equipment is in the music playing mode, the audio and video can support the electronic equipment to play music.
The power supply 105 is used to provide power to various components of the electronic device, and the power supply 105 may include a power management system, one or more power supplies, or other components associated with the electronic device generating, managing, and distributing power.
The actuator 106 may include: an image decoder, a synthesizer, a compressor, a decompressor and a display subsystem DSS. The image decoder may be used to decode the image to obtain the data to be displayed. The synthesizer can be used for synthesizing the sub-data to be displayed output by the image decoder, the GPU and the CPU to obtain the data to be displayed. The compressor can be used for compressing data to be displayed to obtain compressed data. The decompressor may be used to decompress the compressed data to obtain the data to be displayed. The display subsystem DSS may be configured to process the compressed data and transmit the processed compressed data via the display interface.
Although not shown, the electronic device may further include an audio component and a communication component, for example, the audio component includes a microphone, and the communication component includes a wireless fidelity (wireless fidelity, wiFi) module or a bluetooth module, etc., which are not described herein. It will be appreciated by those skilled in the art that the electronic device structure shown in fig. 5 is not limiting of the electronic device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
Fig. 6 is a schematic structural diagram of a display circuit according to an embodiment of the present application, where the display circuit is applied to the electronic device shown in fig. 5, and the display circuit may include: an application chip 10 and a Display Driver IC (DDIC) 12, the application chip 10 being connected to the DDIC12 through a display interface 11; the application chip 10 may be used for obtaining data to be displayed and compressing the data to be displayed to obtain compressed data; the application chip 10 is further configured to perform display processing on the compressed data to obtain compressed data, and send the compressed data to the DDIC12 through the display interface 11; the DDIC12 is operable to receive the compressed data and decompress the compressed data to obtain display data.
The application chip 10 may be a main chip of the display circuit, and the application chip 10 may be a chip obtained after the application processor (application processor, AP) is integrated.
In addition, the application chip 10 may be used to acquire data to be displayed. For example, the application chip 10 may include an image processing subsystem 101, and the image processing subsystem 101 may be used to obtain data to be displayed. The image processing subsystem comprises a synthesizer 04 and at least one of: an image decoder 01, a graphics processor (graphics processing unit, GPU) 02 and a central processing unit (central processing unit, CPU) 03.
Secondly, the data to be displayed can be the data which needs to be displayed by the display circuit. For example, the data to be displayed may be an image that needs to be displayed by the display circuit, or the data to be displayed may be text included in the image that needs to be displayed by the display circuit. The image processing subsystem 101 may obtain the data to be displayed by: the first type of data to be displayed may be data determined by the image decoder 01 and the synthesizer 04, for example, the image decoder 01 may be configured to decode a local picture or an externally input picture to obtain decoded data, and the synthesizer 04 synthesizes the decoded data, that is, the synthesizer synthesizes the decoded data in an interface to obtain the data to be displayed; the second type of data to be displayed can be data determined by the GPU02 and the synthesizer 04, the GPU02 obtains rendering data after rendering, and the synthesizer 04 synthesizes the rendering data to obtain the data to be displayed; third, the data to be displayed may be data determined by the CPU03 and the synthesizer 04, where the CPU03 obtains rendering data after rendering, and the synthesizer 04 synthesizes the rendering data to obtain the data to be displayed. In practical application, the data to be displayed may also be obtained by any one of the above three manners or the above three manners, which is not particularly limited in the embodiment of the present application.
Alternatively, when the data to be displayed is acquired in the above three ways, the data to be displayed may be obtained by the synthesizer 04. For example, the image decoder 01 may be configured to decode a local image or an externally input image to obtain decoded data, the GPU02 obtains first rendered data after rendering, the CPU03 obtains second rendered data after rendering, and the synthesizer 04 may be configured to synthesize the decoded data, the first rendered data, and the second rendered data to obtain the data to be displayed. In practical applications, the synthesizer 04 synthesizes a plurality of data into an interface, and the content in the interface is the data to be displayed.
Further, the application chip 10 may further include: a compressor 102, a Frame Buffer (FB) 103 and a display subsystem (display subsystem, DSS) 104.
The compressor 102 may be configured to compress the data to be displayed to obtain compressed data, for example, the compressor 102 may be configured to compress the data to be displayed according to a corresponding compression protocol to obtain compressed data.
The FB103 can be used to store the compressed data. Optionally, FB103 is further configured to store a compression protocol corresponding to compressor 102 or a decompression protocol corresponding to the compression protocol. The FB103 may also be referred to as a memory. In this embodiment of the present application, the compressor 102 compresses the data to be displayed, so that the amount of data is reduced without losing the data, and when the compressed data is stored in the FB103, compared with the display circuit shown in fig. 1 and 2, the occupied storage space is reduced, and the area of the display circuit is reduced.
The DSS104 may be configured to perform a display process on the compressed data to obtain the compressed data, and send the compressed data to the DDIC12 through the display interface 11. For example, the DSS104 may be configured to change the type, format, and resolution of the compressed data so that the compressed data meets the transmission requirements of the display interface 11 and the display requirements of the display 13, i.e., so that the type, format, and resolution of the compressed data matches the type, format, and resolution of the data required when the display interface 11 is displayed. Optionally, the DSS104 is further configured to control a display position of the compressed data in the display 13, for example, the DSS104 may be configured to send position information corresponding to the compressed data to a display driver chip coupled to the display 13, the display driver chip 12 may be configured to send the position information to the display 13, and the display 13 displays the compressed data according to the position information.
In addition, the display interface 11 may be used to transmit information, for example, the information may include data to be displayed, and the information may further include a compression protocol or a decompression protocol corresponding to the compressor 102. In practical applications, the display interface 11 may be an interface supporting small bandwidth transmission. For example, the display interface 11 may include a mobile industry processor interface (mobile industry processor interface, MIPI) or a high definition multimedia interface (high definition multimedia interface, HDMI).
Further, the display circuit may further include: the display driving chip 12, the application chip 10 and the display driving chip 12 are connected through the display interface 11, and the display driving chip 12 may include a GRAM121 and a decompressor 122.
Among them, the GRAM121 can be used to receive and store compression processing data. Specifically, the GRAM121 may be configured to receive the compression processed data output from the DSS104 and store the compression processed data. Optionally, GRAM121 is also configured to receive a compression protocol or decompression protocol output by DSS 104. GRAM121 is also configured to receive location information output by DSS104, which may be used to indicate the location of the data to be displayed when displayed in a display screen.
The decompressor 122 is operable to decompress the compressed data to obtain display data. For example, the decompressor 122 may be configured to decompress the compressed data according to a decompression protocol corresponding to the compression protocol of the compressor 102, to obtain the display data.
The decompression protocol is a decompression protocol corresponding to the compression protocol of the compressor 102. When the decompressor 122 needs to decompress the compression processed data, the decompressor 122 may obtain the decompression protocol by: the first type, the DSS104 may send the compression protocol corresponding to the compressor 102 to the GRAM121 through the display interface 11 for storing, and the decompressor 122 obtains the compression protocol from the GRAM121, and performs a table look-up according to the compression protocol to obtain a corresponding decompression protocol; the second type of DSS104 may be configured to directly send, via the display interface 11, a decompression protocol corresponding to the compression protocol of the compressor 102 to the GRAM121 for storage, where the decompression protocol is obtained by the decompressor 122 from the GRAM 121. In practical applications, the decompression protocol may be obtained in any of the two manners, which is not specifically limited in the embodiments of the present application.
Further, the display circuit may further include: a display 13, the display 13 being operable to receive and display the display data output by the decompressor 122. For example, the display 13 displays the display data in the form of images, text, or video.
In practical applications, the electronic device may be a wearable device, for example, the electronic device may be a smart watch or a smart bracelet.
In a possible embodiment, the decompressor may be configured to decompress the compressed data according to a decompression protocol corresponding to the compression protocol of the compressor to obtain the display data, and send the display data to the display screen for display, where in this process, after the data to be displayed passes through the application chip and the display driving chip until the data to be displayed is displayed on the display screen, the data to be displayed is compressed and decompressed only once, and compared with the display circuits shown in fig. 3 and fig. 4, the quality of the data to be displayed is improved, and when the display screen displays the display data in the form of an image, the quality of the display image is improved.
The embodiment of the application provides a display circuit, which comprises: the display circuit includes: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface; the application chip is used for acquiring data to be displayed, compressing the data to be displayed and obtaining compressed data; the application chip is also used for carrying out display processing on the compressed data to obtain compressed data, and sending the compressed data to the display driving chip through the display interface; the display driving chip is used for receiving the compression processing data and decompressing the compression processing data to obtain display data. In the process, the application chip sends the compressed data to the display driving chip through the display interface, namely the application chip sends the compressed data to the display driving chip through the display interface, the data quantity is reduced on the premise of not losing the data, and compared with the case that the application chip directly sends the data to be displayed through the display interface, the time for data transmission is shortened, the power consumption in the transmission process is reduced, and therefore the power consumption of a display circuit is reduced; on the other hand, the data to be displayed is compressed and decompressed only once, so that the quality of the display data is ensured, and when the display screen displays the display data in the form of an image, the quality of the image is ensured.
Fig. 7 is a flowchart of a data transmission method according to an embodiment of the present application, where the data transmission method is applied to the display circuit shown in fig. 6, and the data transmission method includes the following steps.
S701: the application chip 10 acquires data to be displayed, and compresses the data to be displayed to obtain compressed data.
Specifically, the data to be displayed may be acquired by the image processing subsystem 101 in the application chip 10, for example, the image processing subsystem includes a synthesizer 04 and at least one of the following: an image decoder 01, a graphics processor (graphics processing unit, GPU) 02 and a central processing unit (central processing unit, CPU) 03. The data to be displayed may be compressed by the compressor 102 in the application chip 10 to obtain compressed data. For example, the compressor 102 may compress the data to be displayed according to a corresponding compression protocol to obtain compressed data.
The data to be displayed may be data that the display circuit needs to display. For example, the data to be displayed may be an image that needs to be displayed by the display circuit, or the data to be displayed may be text included in the image that needs to be displayed by the display circuit. The image processing subsystem 101 may obtain the data to be displayed by: the first type of data to be displayed may be data determined by the image decoder 01 and the synthesizer 04, for example, the image decoder 01 may be configured to decode a local picture or an externally input picture to obtain decoded data, and the synthesizer 04 synthesizes the decoded data, that is, the synthesizer synthesizes the decoded data in an interface to obtain the data to be displayed; the second type of data to be displayed can be data determined by the GPU02 and the synthesizer 04, the GPU02 obtains rendering data after rendering, and the synthesizer 04 synthesizes the rendering data to obtain the data to be displayed; third, the data to be displayed may be data determined by the CPU03 and the synthesizer 04, where the CPU03 obtains rendering data after rendering, and the synthesizer 04 synthesizes the rendering data to obtain the data to be displayed. In practical application, the data to be displayed may also be obtained by any one of the above three manners or the above three manners, which is not particularly limited in the embodiment of the present application.
Alternatively, when the data to be displayed is acquired in the above three ways, the data to be displayed may be obtained by the synthesizer 04. For example, the image decoder 01 may be configured to decode a local image or an externally input image to obtain decoded data, the GPU02 obtains first rendered data after rendering, the CPU03 obtains second rendered data after rendering, and the synthesizer 04 may be configured to synthesize the decoded data, the first rendered data, and the second rendered data to obtain the data to be displayed. In practical applications, the synthesizer 04 synthesizes a plurality of data into an interface, and the content in the interface is the data to be displayed.
Further, after S701, the method further includes: stores the compressed data, and stores a compression protocol corresponding to the compressor 102 or a decompression protocol corresponding to the compression protocol. Specifically, the compressed data may be stored in a Frame Buffer (FB) 103 of the application chip 10, and a compression protocol corresponding to the compressor 102 or a decompression protocol corresponding to the compression protocol.
S702: the application chip 10 performs display processing on the compressed data to obtain compressed data, and sends the compressed data to the display driver chip 12 through the display interface 11.
Specifically, the compressed data may be subjected to display processing by a display subsystem (display subsystem, DSS) 104 in the application chip 10 to obtain compressed data, and the compressed data may be sent to the display driver chip 12 through the display interface 11. For example, the DSS104 may be configured to change the type, format, and resolution of the compressed data so that the compressed data meets the transmission requirements of the display interface 11 and the display requirements of the display 13, i.e., so that the type, format, and resolution of the compressed data matches the type, format, and resolution of the data required when the display interface 11 is displayed. Optionally, the DSS104 is further configured to control a display position of the compressed data in the display 13, for example, the DSS104 may be configured to send position information corresponding to the compressed data to a display driver chip coupled to the display 13, the display driver chip 12 may be configured to send the position information to the display 13, and the display 13 displays the compressed data according to the position information.
S703: the display driving chip 12 receives the compression processing data and decompresses the compression processing data to obtain display data.
Specifically, the compressed data may be received and stored by the GRAM121 in the display driver chip 12, and decompressed by the decompressor 122 in the display driver chip 12 to obtain display data. For example, the GRAM121 may be used to receive the compression processed data output from the DSS104 and store the compression processed data. Optionally, GRAM121 is also configured to receive a compression protocol or decompression protocol output by DSS 104. GRAM121 is also configured to receive location information output by DSS104, which may be used to indicate the location of the data to be displayed when displayed in a display screen. For example, the decompressor 122 may be configured to decompress the compressed data to obtain display data. For example, the decompressor 122 may be configured to decompress the compressed data according to a decompression protocol corresponding to the compression protocol of the compressor 102, to obtain the display data.
The decompression protocol is a decompression protocol corresponding to the compression protocol of the compressor 102. When the decompressor 122 needs to decompress the compression processed data, the decompressor 122 may obtain the decompression protocol by: the first type, the DSS104 may send the compression protocol corresponding to the compressor 102 to the GRAM121 through the display interface 11 for storing, and the decompressor 122 obtains the compression protocol from the GRAM121, and performs a table look-up according to the compression protocol to obtain a corresponding decompression protocol; the second type of DSS104 may be configured to directly send, via the display interface 11, a decompression protocol corresponding to the compression protocol of the compressor 102 to the GRAM121 for storage, where the decompression protocol is obtained by the decompressor 122 from the GRAM 121. In practical applications, the decompression protocol may be obtained in any of the two manners, which is not specifically limited in the embodiments of the present application.
After step S703, the method further includes: and receiving and displaying the data to be displayed. For example, the display 13 may be configured to receive the data to be displayed output by the decompressor 122 and display the data to be displayed. For example, the display 13 displays the data to be displayed in the form of images, text, or videos.
In addition, the display interface 11 may be used to transmit information, for example, the information may include data to be displayed, and the information may further include a compression protocol or a decompression protocol corresponding to the compressor 102. For example, the display interface 11 may include a mobile industry processor interface (mobile industry processor interface, MIPI) or a high definition multimedia interface (high definition multimedia interface, HDMI). In practical applications, the display interface 11 may be an interface supporting small bandwidth transmission.
The embodiment of the application provides a data transmission method, which is applied to a display circuit, wherein the display circuit comprises: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface, and the method comprises the following steps: the application chip acquires data to be displayed, and compresses the data to be displayed to obtain compressed data; the application chip performs display processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface; the display driving chip receives the compressed data and decompresses the compressed data to obtain display data. In the process, the application chip sends the compressed data to the display driving chip through the display interface, namely the application chip sends the compressed data to the display driving chip through the display interface, the data quantity is reduced on the premise of not losing the data, and compared with the case that the application chip directly sends the data to be displayed through the display interface, the time for data transmission is shortened, the power consumption in the transmission process is reduced, and therefore the power consumption of a display circuit is reduced; on the other hand, the data to be displayed is compressed and decompressed only once, so that the quality of the display data is ensured, and when the display screen displays the display data in the form of an image, the quality of the image is ensured.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing an apparatus to perform all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
In yet another aspect of the present application, an electronic device is provided that may include a display circuit, which may be the display circuit shown in fig. 5.
In yet another aspect of the present application, a computer readable storage medium is provided, comprising computer instructions which, when run in a display circuit, cause the display circuit to perform the relevant steps in the method embodiments described above.
In yet another aspect of the application, a computer program product is provided comprising instructions which, when run on a computer device, cause a display circuit to perform the relevant steps in the method embodiments described above.
Finally, it should be noted that: the foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (13)

1. A display circuit for use in an electronic device, the display circuit comprising: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface;
The application chip is used for acquiring data to be displayed, compressing the data to be displayed and obtaining compressed data;
the application chip is also used for carrying out display processing on the compressed data to obtain compressed data, and sending the compressed data to the display driving chip through the display interface;
the display driving chip is used for receiving the compression processing data and decompressing the compression processing data to obtain display data.
2. The display circuit of claim 1, wherein the application chip comprises: an image processing subsystem, a compressor, a frame buffer and a display subsystem;
the image processing subsystem is used for acquiring data to be displayed;
the compressor is used for compressing the data to be displayed to obtain compressed data;
the frame buffer is used for storing the compressed data;
the display subsystem is used for carrying out to-be-displayed processing on the compressed data to obtain the compressed data, and sending the compressed data to the display driving chip through the display interface.
3. The display circuit of claim 2, wherein the image processing subsystem comprises a synthesizer and at least one of: an image decoder, a graphics processor, and a central processing unit.
4. A display circuit according to any one of claims 1 to 3, wherein the display driver chip comprises: an image memory and a decompressor;
the image memory is used for receiving the compression processing data and storing the compression processing data;
the decompressor is used for decompressing the compression processing data to obtain display data.
5. The display circuit of any one of claims 1-4, further comprising a display screen coupled to the display driver chip,
the display screen is used for receiving and displaying the display data.
6. The display circuit of any one of claims 1-5, wherein the display interface comprises: mobile industry processor interface MIPI or high definition multimedia interface HDMI.
7. The display circuit of any one of claims 1-6, wherein the electronic device is a wearable device.
8. A data transmission method, wherein the method is applied to a display circuit, and the display circuit comprises: the display driving device comprises an application chip and a display driving chip, wherein the application chip is connected with the display driving chip through a display interface, and the method comprises the following steps:
the application chip acquires data to be displayed, and compresses the data to be displayed to obtain compressed data;
The application chip performs display processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface;
and the display driving chip receives the compression processing data and decompresses the compression processing data to obtain display data.
9. The method of claim 8, wherein the application chip comprises: the image processing subsystem, the compressor, the frame buffer and the display subsystem, the application chip obtains the data to be displayed, compresses the data to be displayed, and obtains the compressed data, including:
the image processing subsystem acquires data to be displayed;
the compressor compresses the data to be displayed to obtain compressed data;
the application chip performs to-be-displayed processing on the compressed data to obtain compressed data, and sends the compressed data to the display driving chip through the display interface, including:
the frame buffer stores the compressed data;
and the display subsystem performs display processing on the compressed data to obtain the compressed data, and sends the compressed data to the display driving chip through the display interface.
10. The method according to claim 8 or 9, wherein the display driving chip comprises: the image memory and the decompressor, the display driving chip receives the compression processing data and decompresses the compression processing data to obtain display data, the method comprises the following steps:
the image memory receives and stores the compression processing data;
the decompressor decompresses the compression processing data to obtain display data.
11. The method of any of claims 8-10, wherein the display circuit further comprises a display screen coupled to the display driver chip, the method further comprising:
and receiving and displaying the display data.
12. The method of any of claims 8-11, wherein the display interface comprises: mobile industry processor interface MIPI or high definition multimedia interface HDMI.
13. An electronic device comprising a display circuit comprising the display circuit of any one of claims 1-7.
CN202211246326.3A 2022-10-12 2022-10-12 Display circuit and data transmission method Pending CN117872822A (en)

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Application Number Priority Date Filing Date Title
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