CN110728964A - Display frequency adjusting method and device, driving circuit and display device - Google Patents
Display frequency adjusting method and device, driving circuit and display device Download PDFInfo
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- CN110728964A CN110728964A CN201911026036.6A CN201911026036A CN110728964A CN 110728964 A CN110728964 A CN 110728964A CN 201911026036 A CN201911026036 A CN 201911026036A CN 110728964 A CN110728964 A CN 110728964A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
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Abstract
The present disclosure relates to a display frequency adjusting method and device, a driving circuit, and a display device, wherein the display frequency adjusting method includes: sending a data request signal to a processor; when receiving display data sent by the processor responding to the trigger signal, determining the data request signal as the trigger signal; and determining a target display frequency according to the delay time of the trigger signal, wherein the delay time is the time interval between the display starting time of the current frame and the trigger signal. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a display frequency adjusting method and device, a driving circuit and a display device.
Background
The display device needs different refresh frequencies in different application scenarios, for example, when displaying a static picture and displaying a dynamic picture, the refresh frequency of the display device is different. When the display device is switched under different scenes, the refresh frequency of the display device needs to be adjusted.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure provides a display frequency adjusting method and device, a driving circuit, and a display device, and further adjusts a refresh frequency of the display device.
According to a first aspect of the present disclosure, there is provided a display frequency adjustment method for a display apparatus, the display frequency adjustment method including:
sending a data request signal to a processor;
when receiving display data sent by the processor responding to the trigger signal, determining the data request signal as the trigger signal;
and determining a target display frequency according to the delay time of the trigger signal, wherein the delay time is the time interval between the display starting time of the current frame and the trigger signal.
According to an embodiment of the present disclosure, the display frequency adjustment method further includes:
judging whether the target display frequency is consistent with the current display frequency;
and when the target display frequency is inconsistent with the current display frequency, adjusting the display frequency to the target display frequency.
According to an embodiment of the present disclosure, the transmitting a data request signal includes:
obtaining refreshing time corresponding to a plurality of preset display frequencies of a display device;
and sequentially sending the data request signals to the processor according to the sequence of the refreshing time from the starting moment of the current frame.
According to an embodiment of the present disclosure, the transmitting a data request signal further includes:
and when the display data sent by the processor is received, stopping sending the data request signal.
According to an embodiment of the present disclosure, the display frequency adjustment method further includes:
and determining the refreshing time corresponding to each preset display frequency according to a plurality of preset display frequencies of the display device.
According to an embodiment of the present disclosure, the current frame starting time is a time when a previous frame receives display data sent by the processor.
According to a second aspect of the present disclosure, there is provided a display frequency adjustment apparatus including:
a transmitting circuit for transmitting a data request signal to the processor;
the first determining circuit is used for determining the data request signal as a trigger signal when receiving display data sent by the processor in response to the trigger signal;
and the second determining circuit is used for determining the target display frequency according to the delay time of the trigger signal, wherein the delay time is the time interval between the received data and the trigger signal of the current frame when the previous frame is displayed.
According to a third aspect of the present disclosure, there is provided a driving circuit including the display frequency adjustment device described above.
According to a fourth aspect of the present disclosure, there is provided a display device including the driving circuit described above.
According to an embodiment of the present disclosure, the display device further includes:
the processor is connected with the driving circuit and used for receiving a data request signal and sending data to the driving circuit according to a preset frequency;
and the display panel is connected with the driving circuit and used for receiving the driving signal output by the driving circuit and displaying.
According to the display frequency adjusting method, the data request signal is sent to the processor, when the display data sent by the processor responding to the trigger signal is received, the data request signal is determined to be the trigger signal, and the target display frequency is determined according to the delay time of the trigger signal. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic diagram of a first display device provided in an exemplary embodiment of the present disclosure;
fig. 2 is a flowchart of a first display frequency adjustment method provided in an exemplary embodiment of the present disclosure;
fig. 3 is a flowchart of a second display frequency adjustment method provided in an exemplary embodiment of the present disclosure;
fig. 4 is a flowchart illustrating a third method for adjusting display frequency according to an exemplary embodiment of the present disclosure;
fig. 5 is a block diagram of a display frequency adjustment apparatus provided in an exemplary embodiment of the present disclosure;
fig. 6 is a schematic diagram of a second display device provided in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
As shown in fig. 1, the display device may include a driving circuit 200 and a display panel 300, the driving circuit 200 is connected to the display panel 300, and the driving circuit 200 is configured to transmit a driving signal to the display panel 300, where the driving signal includes information such as a driving voltage and a refresh frequency. The driver circuit 200 is connected to the processor 100 of the terminal device, and the processor 100 of the terminal device is configured to transmit the display data to the driver circuit 200.
The exemplary embodiments of the present disclosure first provide a display frequency adjusting method, as illustrated in fig. 2, which may include the steps of:
step S210, sending a data request signal to a processor;
step S220, when receiving the display data sent by the processor responding to the trigger signal, determining the data request signal as the trigger signal;
step S230, determining a target display frequency according to a delay time of the trigger signal, where the delay time is a time interval between a current frame display start time and the trigger signal.
According to the display frequency adjusting method provided by the embodiment of the disclosure, the data request signal is sent to the processor, when the display data sent by the processor responding to the trigger signal is received, the data request signal is determined to be the trigger signal, and the target display frequency is determined according to the delay time of the trigger signal. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
Further, after step S230, as shown in fig. 3, the display frequency adjustment method may further include the steps of:
step S240, judging whether the target display frequency is consistent with the current display frequency;
and step S250, when the target display frequency is inconsistent with the current display frequency, adjusting the display frequency to the target display frequency.
The following will describe each step in the display frequency adjustment method provided by the embodiment of the present disclosure in detail:
in step S210, a data request signal may be sent to the processor.
Wherein the processor may be a Graphic Processor (GPU) in the terminal device, and the driving circuit transmits the data request signal to the graphic processor after the start time of the current frame. After the processor receives the data request signal, when the data request sending time corresponds to the next frame frequency, the graphic processor sends display data to the driving circuit; when the data request signal does not correspond to the next frame frequency, the graphic processor does not send the display data, the driving circuit does not receive the display data, and the driving circuit continues to send the data request to the graphic processor. Of course, in practical applications, the processor may also be another controller in the terminal device, and this is not specifically limited in this disclosure.
In one embodiment, as shown in fig. 4, step S210 may include the following steps:
step S211, obtaining refresh time corresponding to a plurality of preset display frequencies of the display device;
step S212, sequentially sending the data request signals to the processor according to the sequence of the refresh time from the starting time of the current frame.
In step S211, delay times corresponding to a plurality of preset display frequencies of the display device may be acquired.
The display device may be an OLED display device, and the refresh frequency of the OLED display device in practical application is usually a plurality of preset frequencies, and each preset frequency corresponds to a refresh time. The refresh time may be stored in the memory device. While the driver circuit is operating, the driver circuit recalls the stored refresh time from the memory device. Or the preset frequency can be stored in the storage device, and when the display frequency is adjusted, the preset frequency can be called, and the refresh time can be calculated according to the preset frequency.
In step S212, the data request signals may be sequentially sent to the processor at the start time of the current frame in the order of the refresh time.
Each preset frequency in the plurality of preset frequencies corresponds to a refresh time, and the refresh time is shorter as the frequency is higher. And sequentially sending a data request signal to the graphics processor at a time point corresponding to each refreshing time from the starting time of the current frame according to the sequence of the refreshing times from small to large. When the processor transmits the display data in response to the data request signal while transmitting the data request signal, the driving circuit stops transmitting the data request to the graphic processor after receiving the display data. When the processor does not send the display data, the processor indicates that the refresh time is not the refresh time of the next frame display, and the display frequency corresponding to the corresponding refresh time is not the display frequency of the next frame display.
Further, before step S211, a refresh time corresponding to each preset display frequency is determined according to a plurality of preset display frequencies of the display device.
The refresh time may be calculated by a preset frequency, for example, when the display frequency is 120Hz, the refresh time may be 8.3 ms. The refresh time may be 12.5ms when the display frequency is 80 Hz.
In step S220, when receiving the display data sent by the processor in response to the trigger signal, determining that the data request signal is a trigger signal.
The processor transmits the display data according to the target display frequency according to the application environment of the terminal device or the instruction of the user. That is, the time point when the processor sends the display data corresponds to the display refresh time point. When the receiving circuit receives the display data, the data request signal is determined as a trigger signal at this time.
In step S230, a target display frequency may be determined according to a delay time of the trigger signal, where the delay time is a time interval between a display start time of a current frame and the trigger signal.
The display frequency corresponds to the display refresh time, and when the receiving circuit receives the display data, the delay time, which is the refresh time of the next frame, may be determined according to the time interval between the time point of sending the trigger signal and the start time of the current frame, and the display frequency of the next frame may be determined according to the refresh time. For example, if the delay time is 8.3ms, the display frequency of the next frame is 120 Hz.
In step S240, it is determined whether the target display frequency and the current display frequency are consistent.
After the target display frequency is determined in step S230, the target display frequency and the current display frequency are compared. When the target display frequency is compared with the current display frequency, the current display frequency and the target display frequency can be directly compared; or may be achieved by comparing the target display refresh time to the current display refresh time.
In step S250, when the target display frequency is not consistent with the current display frequency, adjusting the display frequency to the target display frequency.
When the target display frequency and the current display frequency are different, the display device needs to adjust the refresh frequency of the display device when displaying the next frame. The refresh frequency of the display device can be adjusted by adjusting the frequency of the display driving gate signal, the source signal, and the like. And when the target display frequency is consistent with the current display frequency, indicating that the display frequency of the next frame is the same as the current display frequency without adjustment.
It should be noted that the starting time of the current frame is the time when the previous frame receives the display data sent by the processor. The display device is carried out frame by frame in the display process, and when the driving circuit receives display data sent by the processor, the display device can carry out picture refreshing. That is, when the driving circuit receives the display data sent by the processor during one frame display, the display device refreshes and displays the next frame.
The display frequency adjusting method provided by the embodiment of the disclosure is used for controlling and adjusting the refresh frequency of the display device. When the display device is refreshed, the display state of the pixel unit is refreshed, and the display state of the pixel unit is driven and refreshed by the pixel driving circuit. Therefore, the display driving circuit needs to output a control signal capable of controlling the refresh of the pixel cells at the target display frequency to the pixel driving circuit. The control signal may include a source signal (data signal), a gate signal (scan signal), a reset signal, and the like.
According to the display frequency adjusting method provided by the embodiment of the disclosure, the data request signal is sent to the processor, when the display data sent by the processor responding to the trigger signal is received, the data request signal is determined to be the trigger signal, and the target display frequency is determined according to the delay time of the trigger signal. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The exemplary embodiment of the present disclosure also provides a display frequency adjusting apparatus, as shown in fig. 5, the display frequency adjusting apparatus 500 including:
a transmitting circuit 510 for transmitting a data request signal to the processor;
a first determining circuit 520, configured to determine that the data request signal is a trigger signal when receiving display data sent by the processor in response to the trigger signal;
a second determining circuit 530, configured to determine a target display frequency according to a delay time of the trigger signal, where the delay time is a time interval between receiving data when a previous frame is displayed and the trigger signal of a current frame.
According to the display frequency adjusting device provided by the embodiment of the disclosure, the sending circuit sends the data request signal to the processor, when the receiving circuit receives the display data sent by the processor in response to the trigger signal, the first determining circuit determines the data request signal as the trigger signal, and the second determining circuit determines the target display frequency according to the delay time of the trigger signal. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
Further, the display frequency adjustment apparatus further includes:
the judging circuit is used for judging whether the target display frequency is consistent with the current display frequency or not;
and the adjusting circuit is used for adjusting the display frequency to the target display frequency when the target display frequency is inconsistent with the current display frequency.
In one possible embodiment, the transmission circuit includes:
the acquisition sub-circuit is used for acquiring the refreshing time corresponding to a plurality of preset display frequencies of the display device;
and the sending sub-circuit is used for sending the data request signals to the processor in sequence according to the sequence of the refreshing time from the starting time of the current frame.
In a possible embodiment, the transmission circuit further includes:
and the stopping sub-circuit is used for stopping the transmission of the data request signal when receiving the display data transmitted by the processor.
In a possible embodiment, the transmission circuit further includes:
and the determining sub-circuit is used for determining the refreshing time corresponding to each preset display frequency according to a plurality of preset display frequencies of the display device.
The details of the circuits of the display frequency adjusting devices are described in detail in the corresponding display frequency adjusting methods, and therefore are not described herein again.
It should be noted that although in the above detailed description reference is made to several circuits or sub-circuits of the display frequency determination means, such a division is not mandatory. Indeed, the features and functions of two or more circuits or sub-circuits described above may be embodied in one circuit or sub-circuit, in accordance with embodiments of the present disclosure. Conversely, features and functions of one circuit or sub-circuit described above may be further divided into embodiments by a plurality of circuits or sub-circuits.
The exemplary embodiments of the present disclosure also provide a driving circuit including the display frequency adjusting apparatus described above.
As shown in fig. 6, the driving circuit may include a transmitting circuit 210, a receiving circuit 230, a frequency control circuit 220, a storage circuit 240, and a driving signal output circuit 250. The transmitting circuit 210 is connected to the processor 100 of the terminal device for transmitting a data request to the processor 100. The receiving circuit 230 is connected to the processor 100 of the terminal device for receiving the display data transmitted by the processor 100 in response to the data request signal. The frequency control circuit 220 is connected to the receiving circuit 230, and is configured to determine a target display frequency of a next frame according to the delay time of the trigger signal, and control the driving signal output circuit 250 to output the driving signal, so that the refresh frequency of the display apparatus is the target display frequency.
Wherein the transmission circuit 210 transmits a data request signal to the graphic processor by the driving circuit after the start time of the current frame. After receiving the data request signal, the processor 100 sends display data to the driving circuit when the time of sending the data request corresponds to the next frame frequency; when the data request signal does not correspond to the next frame frequency, the graphic processor does not send the display data, the driving circuit does not receive the display data, and the driving circuit continues to send the data request to the graphic processor.
The receiving circuit 230 receives display data transmitted by the processor in response to the data request signal, the receiving circuit 230 is connected to the storage circuit 240, and the receiving circuit 230 stores the received display data in the storage circuit 240. The frequency control circuit 220 is connected to the transmission circuit 210, the reception circuit 230, and the drive signal output circuit 250, respectively. The frequency control circuit 220 is configured to control the transmitting circuit 210 to transmit the data request signal according to a preset time, monitor whether the receiving circuit 230 receives the display data, and determine a target display frequency according to the data request signal and a time when the display data is received. After determining the target display frequency, the frequency control circuit 220 controls the driving signal output circuit 250 to output the driving signal.
It should be noted that the connection between the sending circuit 210 and the receiving circuit 230 and the processor 100 may be a wired connection or a wireless connection, that is, the data request signal and the display data may be transmitted in a wired manner or in a wireless manner, which is not limited in this disclosure.
According to the driving circuit provided by the embodiment of the disclosure, the sending circuit sends the data request signal to the processor, when the receiving circuit receives the display data sent by the processor in response to the trigger signal, the receiving circuit receives the display data, and the frequency control circuit determines the target display frequency according to the data request signal and the time of the display data. The display refreshing frequency under different application scenes is determined, the processor is not required to send a frequency switching control signal to the display driving circuit, the processing flow of the processor is reduced, and the display refreshing frequency is adjusted conveniently and quickly.
The exemplary embodiments of the present disclosure also provide a display device including the driving circuit described above.
Further, the display device may further include a processor and a display panel, and the processor is connected to the driving circuit and configured to receive a data request signal and send data to the driving circuit according to a preset frequency. The display panel is connected with the driving circuit and used for receiving the driving signal output by the driving circuit and displaying. The display device may include any product or component with a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, and a navigator.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A display frequency adjustment method, characterized by comprising:
sending a data request signal to a processor;
when receiving display data sent by the processor responding to the trigger signal, determining the data request signal as the trigger signal;
and determining a target display frequency according to the delay time of the trigger signal, wherein the delay time is the time interval between the display starting time of the current frame and the trigger signal.
2. The display frequency adjustment method of claim 1, further comprising:
judging whether the target display frequency is consistent with the current display frequency;
and when the target display frequency is inconsistent with the current display frequency, adjusting the display frequency to the target display frequency.
3. The display frequency adjustment method of claim 1, wherein the transmitting a data request signal comprises:
obtaining refreshing time corresponding to a plurality of preset display frequencies of a display device;
and sequentially sending the data request signals to the processor according to the sequence of the refreshing time from the starting moment of the current frame.
4. The display frequency adjustment method of claim 3, wherein the transmitting a data request signal further comprises:
and when the display data sent by the processor is received, stopping sending the data request signal.
5. The display frequency adjustment method of claim 3, further comprising:
and determining the refreshing time corresponding to each preset display frequency according to a plurality of preset display frequencies of the display device.
6. The display frequency adjustment method according to any one of claims 1 to 5, wherein the current frame start time is a time at which a previous frame received the display data transmitted by the processor.
7. A display frequency adjustment apparatus, characterized by comprising:
a transmitting circuit for transmitting a data request signal to the processor;
the first determining circuit is used for determining the data request signal as a trigger signal when receiving display data sent by the processor in response to the trigger signal;
and the second determining circuit is used for determining the target display frequency according to the delay time of the trigger signal, wherein the delay time is the time interval between the received data and the trigger signal of the current frame when the previous frame is displayed.
8. A driving circuit characterized by comprising the display frequency adjustment apparatus according to claim 6.
9. A display device characterized in that the display device comprises the driver circuit of claim 7.
10. The display device according to claim 9, wherein the display device further comprises:
the processor is connected with the driving circuit and used for receiving a data request signal and sending data to the driving circuit according to a preset frequency;
and the display panel is connected with the driving circuit and used for receiving the driving signal output by the driving circuit and displaying.
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| CN113608713B (en) * | 2021-07-30 | 2023-09-26 | Oppo广东移动通信有限公司 | Variable frequency display method, DDIC, display screen module and terminal |
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