Display driving system, driving method thereof and display device

Abstract

The invention provides a display driving system, a driving method thereof and a display device.The display driving system comprises a source driver and a power manager which are electrically connected, the source driver comprises an identification module used for identifying an instruction and a power-saving control module electrically connected to the identification module and used for generating a power-saving control signal according to the instruction, the power manager comprises an electric signal generation module used for generating an electric signal, and the electric signal generation module is further electrically connected to the power saving control module and used for reducing the value of the generated electric signal according to the power saving control signal so as to reduce power consumption.

Description

Technical Field

[0001] The present invention relates to the field of display technology, in particular to the manufacture of display devices, and specifically to a display driving system, its driving method, and a display device. Background Art

[0002] With the further improvement of energy efficiency standards, the energy consumption index has also been increased.

[0003] Among them, in the panel industry, the overall power consumption target of the whole machine also needs to be reduced. Therefore, low-power technologies and algorithms will be a hard requirement for the next-generation display driving system. To meet the requirements of the energy consumption standard, it is necessary to optimize the power consumption of the display driving system and enhance the competitiveness of panel products. Summary of the Invention

[0004] The purpose of the present invention is to provide a display driving system, its driving method, and a display device to reduce the power consumption of the existing display driving system and the display panel including the display driving system.

[0005] The present invention provides a display driving system applied to a display panel, including at least one source driver and a power supply manager electrically connected to the source driver. The source driver includes:

[0006] An identification module for identifying instructions;

[0007] A power-saving control module electrically connected to the identification module for generating a power-saving control signal according to the instructions;

[0008] Wherein, the power supply manager includes an electrical signal generation module for generating an electrical signal, and is electrically connected to the power-saving control module for reducing the value of the generated electrical signal according to the power-saving control signal.

[0009] In one embodiment, the power-saving control module includes a plurality of switching elements arranged in parallel. The plurality of input terminals of the plurality of switching elements are electrically connected and loaded with a working voltage, and the plurality of output terminals of the plurality of switching elements are all electrically connected to the electrical signal generation module;

[0010] Wherein, the source driver further includes:

[0011] A logic module electrically connected between the identification module and the plurality of control terminals of the plurality of switching elements for controlling the opening and closing of the plurality of switching elements according to the instructions to control the power-saving control module to generate the power-saving control signal.

[0012] In one embodiment, the display driving system is configured to:

[0013] Control the display panel to be in the scanning stage;

[0014] Control the display panel to be in the blanking stage;

[0015] Wherein, the value of the electrical signal generated by the electrical signal generation module in the blanking stage is less than the value of the electrical signal generated in the scanning stage.

[0016] In one embodiment, the scanning stage includes a plurality of line scanning stages, and the blanking stage includes a plurality of line blanking stages and a frame blanking stage;

[0017] In one frame, the line blanking stage is included between two adjacent line scanning stages, and the frame blanking stage is included between two corresponding scanning stages of two adjacent frames;

[0018] Wherein, the display driving system further includes:

[0019] A timing controller, configured to generate a line blanking flag in the line blanking stage and a frame blanking flag in the frame blanking stage;

[0020] Wherein, the instruction includes at least one of the line blanking flag and the frame blanking flag.

[0021] In one embodiment, the frame blanking flag includes a first frame blanking flag and a second frame blanking flag located after the first frame blanking flag;

[0022] The source driver further includes:

[0023] A timing module, electrically connected between the identification module and the power saving control module, for obtaining the interval between the first frame blanking flag and the second frame blanking flag to determine the frame blanking stage, so as to control the power saving control module to generate the corresponding power saving control signal.

[0024] In one embodiment, the blanking flag includes a first blanking flag and a third blanking flag located after the first blanking flag;

[0025] The power saving control module is configured to generate the corresponding power saving control signal according to the first blanking flag and the third blanking flag.

[0026] The present invention also provides a display device, including a display panel and a display driving system as described in any one of the above electrically connected to the display panel.

[0027] The present invention also provides a driving method of the display driving system, applied to a display panel, including:

[0028] Obtain a first instruction, and determine whether the first instruction includes a first flag;

[0029] If the first instruction includes the first flag, a power saving control signal is generated according to the first flag, and the value of the generated electrical signal is reduced according to the power saving control signal to control the display panel to enter the power saving mode.

[0030] In one embodiment, the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter the power saving mode includes:

[0031] Start the first timing;

[0032] After the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter the power saving mode, it includes:

[0033] Obtain a second instruction and determine whether the second instruction includes a second flag;

[0034] If the instruction includes the second flag, obtain the first timing value of the first timing, clear it, and start the second timing;

[0035] Obtain the second timing value of the second timing and determine whether the second timing value and the first timing value satisfy a preset relationship;

[0036] If the second timing value and the first timing value satisfy the preset relationship, control the display panel to exit the power saving mode.

[0037] In one embodiment, after the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter the power saving mode, it includes:

[0038] Obtain a second instruction and determine whether the instruction includes a third flag;

[0039] If the second instruction includes the third flag, control the display panel to exit the power saving mode

[0040] The present invention provides a display driving system, a driving method thereof, and a display device. The display driving system includes at least one source driver and a power manager electrically connected to the source driver. The source driver includes: an identification module for identifying an instruction; a power saving control module electrically connected to the identification module for generating a power saving control signal according to the instruction. Wherein, the power manager includes an electrical signal generating module for generating an electrical signal and electrically connected to the power saving control module for reducing the value of the generated electrical signal according to the power saving control signal. Therefore, the power saving control module can generate a power saving control signal under an instruction corresponding to a working state with a relatively low power consumption requirement, and the electrical signal generating module for generating an electrical signal can reduce the value of the generated electrical signal according to the power saving control signal, thereby achieving the purpose of power consumption saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the drawings in the following description are only used to explain some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0042] Figure 1 and Figure 3 is a block diagram of the display driving system provided by an embodiment of the present invention.

[0043] Figure 2 is a circuit diagram of some modules of the display driving system provided by an embodiment of the present invention.

[0044] Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 is a flowchart of the driving method of the display driving system provided by an embodiment of the present invention.

[0045] Figure 7 is a waveform diagram of some signals of the display driving system provided by an embodiment of the present invention.

[0046] Figure 9 is a block diagram of the display device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0048] In the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include one or more of the said features. Additionally, it should be noted that the drawings only provide the structures that are relatively closely related to the present invention, omitting some details that are not closely related to the invention, with the aim of simplifying the drawings and making the inventive points obvious at a glance, rather than indicating that the actual device is exactly the same as the attached Figure 1 drawing and not serving as a limitation on the actual device.

[0049] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appearing at various times in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0050] The present invention provides a display driving system applied to a display panel and a display device including the display driving system. The display driving system may include, but is not limited to, the following embodiments and combinations of the following embodiments.

[0051] Specifically, as Figure 9 shown, the display device 1000 includes a display panel 200 and a display driving system 100 as described in any of the following connected electrically to the display panel 200. Among them, the display driving system 100 may include a timing controller 50, a gate driver 700 and a source driver 60 electrically connected to the timing controller 50, and a power manager (not shown) for supplying power to the timing controller 50, the gate driver 700 and the source driver 60. The display panel 200 may include a plurality of sub-pixels 101. Here, taking the plurality of sub-pixel arrays arranged in n rows and m columns as an example, the gate driver 700 may receive a first control signal generated by the timing controller 50 and generate n gate signals (GL1 to GLn) accordingly. GL1 to GLn are respectively loaded onto the n rows of sub-pixels 101 to control the n rows of sub-pixels 101 to turn on in sequence. The source driver 60 may receive a second control signal generated by the timing controller 50 and generate m data signals (DL1 to DLm) accordingly. DL1 to DLm are respectively loaded onto the m sub-pixels 101 in the same row that is in the on state at this time to control the m sub-pixels 101 in this row to emit light. By analogy, after the n rows of sub-pixels 101 emit light in sequence, a frame of image is presented.

[0052] In one embodiment, in combination with Figure 1 and Figure 9As shown, the display driving system 100 includes at least one source driver 60 and a power manager 80 electrically connected to the source driver 60. The source driver 60 includes: an identification module 10 for identifying an instruction CMD; a power saving control module 20 electrically connected to the identification module 10 for generating a power saving control signal con according to the instruction CMD. Wherein, the power manager 80 includes an electrical signal generating module 30 for generating an electrical signal el and electrically connected to the power saving control module 20 for reducing the value of the generated electrical signal el according to the power saving control signal con. In this embodiment, the transmission protocol of the display driving system 100 is not limited, as long as it has the above functions. The display driving system 100 can drive multiple sub-pixels for screen display. For the convenience of description, in the following, it is taken as an example that multiple sub-pixels are arranged in the row direction and the column direction, but the present invention is not limited to this arrangement, and the corresponding setting methods for other arrangements can also be adjusted according to this design idea.

[0053] Among them, the above instructions may include but are not limited to the content shown in Table 1. Among them, "Line1", "Line2"... "Last Line data" respectively correspond to the first row of sub-pixels, the second row of sub-pixels until the last row of sub-pixels. CT can be a handshake flag for controlling the handshake between the sender and the receiver to confirm that data communication is about to occur. CS can be the start flag of data transmission, CE can be the end flag of data transmission, "RGB data" can be the grayscale information of the sub-pixels in this row for controlling the light emission of the sub-pixels in this row. CMD1 can be an odd row flag indicating that the corresponding "RGB data" corresponds to the odd row sub-pixels, CMD2 can be an even row flag indicating that the corresponding "RGB data" corresponds to the even row sub-pixels, CMD3 can be a frame check flag, "Frame CTL setting" can be the data required for frame check, CMD4 can be the first frame blanking flag, and CMD5 can be the second frame blanking flag.

[0054] Table 1

[0055]

[0056] It can be understood that in this embodiment, an identification module 10 is provided, which can be used to identify the instruction CMD. As discussed above, the specific content of the current instruction CMD can represent the current working state of the display driving system 100, and it can be considered that different working states have different power consumption requirements. Further, the power saving control module 20 in this embodiment can be used to generate a power saving control signal con according to the instruction CMD (that is, according to the working state), that is, generate a power saving control signal con under the instruction CMD corresponding to the working state with a lower power consumption requirement. Furthermore, the electric signal generation module 30 for generating the electric signal el can at least be used to reduce the value of the generated electric signal el according to the power saving control signal con, so as to achieve the purpose of saving power consumption.

[0057] In one embodiment, as shown in combination with Figure 1 and Figure 2 The power saving control module 20 includes a plurality of switching elements 201 arranged in parallel. The plurality of input terminals of the plurality of switching elements 201 are electrically connected and loaded with the working voltage VAA. The plurality of output terminals of the plurality of switching elements 201 are all electrically connected to the electric signal generation module. Among them, the source driver 60 further includes: a logic module 40, electrically connected between the identification module 10 and the plurality of control terminals of the plurality of switching elements 201, and used to control the opening and closing of the plurality of switching elements 201 according to the instruction, so as to control the power saving control module 20 to generate the power saving control signal con. Among them, in this embodiment, the magnitude of the working voltage VAA is not limited. To reduce the risk of the branch current of each switching element 201 being too large and causing the switching element 201 to burn out, a resistor element (R1, R2, R3) connected in series with the switching element 201 can be provided on the path of each switching element 201. For the convenience of description here, only the switching element 201 is taken as a transistor, and the power saving control module 20 includes 3 switching elements 201 arranged in parallel as an example for illustration, but the present invention is not limited to this device type and number, and the corresponding setting methods for other device types and numbers can also be adjusted according to this design idea.

[0058] Specifically, based on the above assumptions, the logic module 40 may include three output terminals respectively electrically connected to the gates of three transistors (i.e., the control terminals of the switching elements 201) to respectively load a first voltage A, a second voltage B, and a third voltage C. The three transistors can be turned on or off according to the magnitudes of the first voltage A, the second voltage B, and the third voltage C generated by the logic module 40. Based on the fact that the source electrodes of the three transistors are all loaded with the above-mentioned operating voltage VAA, the power-saving control signal con can be understood as the sum of the current signals respectively output from the drains of the three transistors, or can also be understood as the voltage signal after the voltages of the drains of the three transistors are synthesized. Among them, the more transistors are turned on, it can be understood that the more branches for generating current there are, the greater the sum of the current signals respectively output from the drains of the three transistors. It can also be understood that the more the number of electrical parallel connections in the three branches, the smaller the overall resistance value, and the smaller the voltage drop generated by the operating voltage VAA, and the greater the voltage of the drains of the three transistors, that is, it can be considered that the value of the power-saving control signal con generated by the power-saving control module 20 is greater, and thus the value of the electrical signal el generated by the electrical signal generation module 30 is smaller or larger; conversely, the fewer transistors are turned on, the greater or smaller the value of the generated electrical signal el is.

[0059] Among them, in this embodiment, the specific circuit structure of the electrical signal generation module 30 is not limited, and it can be understood that it is controlled by the power-saving control signal con to process the input signal to generate the corresponding electrical signal el. As Figure 3 shown, the electrical signal generation module 30 in this embodiment may include, but is not limited to, an operational amplifier circuit. The operational amplifier circuit may include a positive input terminal IN_P, a negative input terminal IN_N, a control terminal for loading the power-saving control signal con, and an output terminal Output for outputting the electrical signal el. Among them, the voltage of the output terminal Output of the operational amplifier circuit can be jointly determined by the voltage of the positive input terminal IN_P and the voltage of the negative input terminal IN_N. The current of the output terminal Output of the operational amplifier circuit can be determined by the power-saving control signal con. In this way, when the magnitude of the voltage of the output terminal Output of the operational amplifier circuit is certain (i.e., maintaining the transmission of the original voltage value), the power-saving control signal con can be used to reduce the magnitude of the current of the output terminal Output of the operational amplifier circuit, thereby reducing the power consumption.

[0060] It should be noted that in this embodiment, there is no limitation on the specific module connected to the output terminal Output of the operational amplifier circuit. It can be understood that the output terminal Output of the operational amplifier circuit transmits a voltage signal (independent of the power consumption requirement) to the corresponding module, and can also transmit a current signal of a corresponding magnitude according to the power consumption requirement of the corresponding module. Specifically, the logic module 40 can control the signals (including but not limited to the first voltage A, the second voltage B, and the third voltage C) acting on the power saving control module 20 according to instructions, and further control the specific value of the power saving control signal con generated by the power saving control module 20 to reduce the value of the electrical signal el (which can be understood as the current value here) generated by the electrical signal generation module 30 by a corresponding amplitude. For example, the current value can drop to 70% of the original or other ratios.

[0061] In one embodiment, the display driving system 100 is configured to: control the display panel 200 to be in the scanning stage; control the display panel 200 to be in the blanking stage; wherein, the value of the electrical signal el generated by the electrical signal generation module 30 in the blanking stage is less than the value of the electrical signal el generated in the scanning stage. Combining Table 1 and the related discussion, it can be seen that different working states have different requirements for power consumption. Here, the scanning stage can be understood as the stage where each row of sub-pixels is turned on and multiple sub-pixels in that row of sub-pixels are respectively loaded with corresponding data signals (generated according to the corresponding "RGB data"). Since this stage requires turning on the sub-pixels and loading the corresponding data voltage to the sub-pixels, the scanning stage (at least corresponding to the time period for transmitting each "Line" content in Table 1) can be considered as a stage with relatively high power consumption requirements. Correspondingly, the stage other than this can be called the blanking stage. At this time, since the sub-pixels have been loaded with the corresponding data voltage and only need to be maintained at the corresponding brightness, the blanking stage (at least corresponding to the frame blanking period in Table 1, that is, "Vertical blanking") can be considered as a stage with relatively low power consumption requirements.

[0062] In summary, in this embodiment, by setting the recognition module 10, the power saving control module 20, and the electrical signal generation module 30 in the display driving system 100, the recognition module 10 can be set to recognize the instruction corresponding to the blanking stage, so that the power saving control module 20 generates the power saving control signal con in the blanking stage, and further controls the electrical signal generation module 30 to reduce the value of the generated electrical signal el through the power saving control signal con, thereby achieving the effect of saving power.

[0063] Further, in combination with Table 1, the scanning stage includes a plurality of line scanning stages, and the blanking stage includes a plurality of line blanking stages and a frame blanking stage; in one frame, the line blanking stage is included between two adjacent line scanning stages, and the frame blanking stage is included between two corresponding scanning stages of two adjacent frames. Specifically, the period for transmitting the "Line" content corresponding to each row of sub-pixels can be referred to as the line scanning period, and it can be considered that there is a time gap between the periods for transmitting the "Line" content corresponding to two adjacent rows of sub-pixels, and this time gap can be referred to as the line blanking stage. After the scanning period corresponding to the last row of sub-pixels, it can be considered that the frame blanking stage is started until the start of the scanning period corresponding to the first row of sub-pixels in the next frame of the picture.

[0064] Based on the above discussion, in combination with Figure 1 、 Figure 2 and Figure 3 as shown, the display driving system 100 includes: a timing controller 50, configured to generate a line blanking flag (which can be included in the entire instruction CMD) during the line blanking stage, and generate a frame blanking flag (which can be included in the entire instruction CMD) during the frame blanking stage; a source driver 60, including the recognition module 10 and the power saving control module 20, and the instruction CMD includes at least one of the line blanking flag and the frame blanking flag.

[0065] Specifically, in combination with the above discussion about Table 1, for example, if the electrical signal generation module 30 is used to control the value of the electrical signal el to decrease during the frame blanking stage, it can be considered that during the period when the recognition module 10 recognizes the frame blanking flag (including at least one of the first frame blanking flag CMD4 and the second frame blanking flag CMD5), the power saving control module 20 is used to generate a power saving control signal con; and for another example, if the electrical signal generation module 30 is used to control the value of the electrical signal el to decrease during the line blanking stage, it can be considered that during the period when the recognition module 10 recognizes the line blanking flag (which can be before the end flag CE of the data transmission corresponding to the previous row of sub-pixels and the handshake flag CT corresponding to the next row of sub-pixels, and of course, it can also include the end flag CE of the corresponding data transmission), the power saving control module 20 is used to generate a power saving control signal con.

[0066] In an embodiment, referring to Table 1, the frame blanking flag includes a first frame blanking flag (such as the first frame blanking flag CMD4), and a second frame blanking flag (such as the second frame blanking flag CMD5) located after the first frame blanking flag; based on this, in combination with Figure 1 、 Figure 2 and Figure 3As shown, the source driver 60 further includes a timing module 70, electrically connected between the identification module 10 and the power saving control module 20, for obtaining the interval between the first frame blanking flag and the second frame blanking flag to determine the frame blanking stage, so as to control the power saving control module 20 to generate the corresponding power saving control signal con.

[0067] Specifically, referring to Table 1, the first frame blanking flag (such as the first frame blanking flag CMD4) can be transmitted first to indicate entering the frame blanking stage, and then the handshake flag CT corresponding to the second frame blanking flag (such as the second frame blanking flag CMD5) after the handshake flag CT corresponding to the first frame blanking flag and before the start flag CS of data transmission are transmitted in sequence. Then, the second frame blanking flag (such as the second frame blanking flag CMD5) is transmitted. That is, it can be considered that the interval between the first frame blanking flag and the second frame blanking flag is equal to the duration of transmitting two handshake flags CT and a start flag CS of data transmission. Similarly, observing Table 1, it can be seen that the interval between the second frame blanking flag CMD5 and the odd row flag CMD1 corresponding to the first row of sub-pixels of the next frame is also equal to the above duration, and a new scanning stage starts only after the odd row flag CMD1. Therefore, by obtaining the interval between the first frame blanking flag and the second frame blanking flag, the end moment of the frame blanking stage (i.e., the moment when the odd row flag CMD1 corresponding to the first row of sub-pixels of the next frame is recognized) can be determined, so as to determine the blanking period, so as to ensure that the power saving control signal con can be maintained during this period to achieve low power consumption during this period.

[0068] In an embodiment, referring to Table 1, the blanking flag includes a first blanking flag (such as the first frame blanking flag CMD4) and a third blanking flag (such as the odd row flag CMD1 corresponding to the first row of sub-pixels of the next frame) after the first blanking flag; based on this, by comparison Figure 3 As shown, the power saving control module 20 is used to generate the corresponding power saving control signal con according to the first blanking flag and the third blanking flag.

[0069] It should be noted that the difference between this embodiment and the previous embodiment is that the identification module 10 can determine the end moment of the frame blanking stage by identifying the third blanking flag, without setting a timing module 70 to further determine the end moment of the frame blanking stage by timing based on the identification module 10 identifying the second frame blanking flag.

[0070] The present invention also provides a driving method for a display driving system, applied to a display panel, as Figure 4 shown, which may include but is not limited to the following steps and combinations of the following steps.

[0071] S1. Obtain a first instruction and determine whether the first instruction includes a first flag.

[0072] Herein, the first instruction can be understood as, for example, the recognition module 10 continuously obtains flags currently and determines whether each obtained flag is the first flag. Step S1 can be considered that the display panel has not entered the power-saving mode, that is, at this time, it can be considered that, for example, the value of the electrical signal el generated by the electrical signal generation module 30 is still relatively large. The instruction including multiple flags obtained for judgment at this stage is called the first instruction.

[0073] If the first instruction includes the first flag, then execute:

[0074] S2. Generate a power-saving control signal according to the first flag, and reduce the value of the generated electrical signal according to the power-saving control signal to control the display panel to enter the power-saving mode.

[0075] Among them, the first flag can be, but is not limited to, the first frame blanking flag mentioned above (such as the first frame blanking flag CMD4). At this time, it can indicate that the display panel has just ended all the scanning stages of a frame and has just entered the frame blanking stage, that is, has entered the power-saving mode. At this stage, as discussed above, for example, the power-saving control module 20 can generate a power-saving control signal con, and for example, the electrical signal generation module 30 can reduce the value of the generated electrical signal el according to the power-saving control signal con. The specific reduction principle can refer to the above discussion about Figure 2 the discussion.

[0076] Of course, if the first instruction does not include the first flag, then step S1 can be continued to execute, that is, continue to obtain and judge the first instruction.

[0077] In an embodiment, as Figure 5 shown, step S2 may include:

[0078] S201. Start the first timing.

[0079] Furthermore, after step S2, it may include, but is not limited to, the following steps and combinations of the following steps.

[0080] S3. Obtain a second instruction and determine whether the second instruction includes a second flag.

[0081] Similarly, the second instruction here can be understood as, for example, the recognition module 10 continuously obtains flags after recognizing the first flag and determines whether each obtained flag is the second flag. Step S3 can be considered that the display panel is in the power-saving mode, that is, at this time, it can be considered that, for example, the value of the electrical signal el generated by the electrical signal generation module 30 has been controlled by the power-saving control signal con and has decreased.

[0082] If the instruction includes the second flag, execute:

[0083] S4. Obtain the first timing value of the first timing, clear it, and then start the second timing.

[0084] Among them, the second flag can be, but is not limited to, the second frame blanking flag mentioned above (such as the second frame blanking flag CMD5). Combining the above discussion, at this time, after transmitting the first frame blanking flag (such as the first frame blanking flag CMD4), two handshake flags CT and a start flag CS for data transmission have been continuously transmitted. Therefore, the first timing value obtained at this time is equal to the duration of transmitting two handshake flags CT and a start flag CS for data transmission. Combining the above discussion, it can be known that if two handshake flags CT and a start flag CS for data transmission are transmitted again, it can be considered to enter a new round of scanning stage.

[0085] S5. Obtain the second timing value of the second timing, and determine whether the second timing value and the first timing value satisfy a preset relationship.

[0086] It can be understood that the start moment of the second timing value is the same as the end moment of the first timing value. If entering a new round of scanning stage, it can be judged according to whether the second timing value is equal to the first timing value (that is, the preset relationship). Of course, according to different transmission protocols, there may be other setting methods for the preset relationship.

[0087] If the second timing value and the first timing value satisfy the preset relationship, execute:

[0088] S6. Control the display panel to exit the power saving mode.

[0089] It can be understood that when the second timing value and the first timing value satisfy the preset relationship, that is, entering a new round of scanning stage, that is, the current frame blanking period ends. Therefore, the power saving mode can be exited. Specifically, it can be understood that the power saving control module stops outputting the power saving control signal con, so that the electrical signal generation module 30 resumes generating an electrical signal el with its original size (larger value), rather than generating an electrical signal el with a smaller value, so as to be sufficient for the scanning function of the display panel.

[0090] Of course, it is also possible to continue timing based on the first timing value to obtain the corresponding third timing value, and another preset relationship can also be set to exit the power saving mode when the third timing value and the first timing value satisfy this preset relationship.

[0091] Furthermore, Figure 4 and Figure 5 The method shown can also refer to the flowchart shown in Figure 6 and can include, but is not limited to, the following steps:

[0092] S01, the first frame blanking flag CMD4 is recognized;

[0093] S02, control the Wake signal to generate a high level;

[0094] S03, enter the power-saving mode;

[0095] S04, start the first timing;

[0096] S05, determine whether the second frame blanking flag CMD5 is recognized;

[0097] If the second frame blanking flag CMD5 is recognized, then execute:

[0098] S06, obtain the first timing value of the first timing, clear it, and then start the second timing;

[0099] S07, control the Wake signal to maintain a high level;

[0100] S08, obtain the second timing value of the second timing, and determine whether the second timing value is equal to the first timing value;

[0101] If the second timing value is equal to the first timing value, then execute:

[0102] S09, control the Wake signal to generate a low level, and exit the power-saving mode.

[0103] Among them, as Figure 7 shown, the image signal Sg generated by the timing controller 50 can be divided into the Nth frame and the (N + 1)th frame according to time, and the time period of each frame can be divided into a corresponding scanning stage and a corresponding frame blanking stage.

[0104] Among them, the Wake signal can be generated by the logic module 40 according to the instruction situation in the image signal Sg. Combining with Table 1, it can be seen that since the first frame blanking flag CMD4 is located near the start in the V-BK stage, the jump of the Wake signal from low level to high level lags behind V-BK by some. Similarly, since the second frame blanking flag CMD5 is located before the Active of the next frame, the jump of the Wake signal from high level to low level is ahead of Active by some.

[0105] Among them, the Wake signal can be understood as being provided for the user to view to understand the working state of the current display driving system 100. Of course, the logic module can also transmit the Wake signal to the power-saving control module 20 to trigger entering the power-saving mode through the rising edge of the Wake signal, and trigger exiting the power-saving mode, that is, entering the normal mode, through the falling edge of the Wake signal.

[0106] In one embodiment, after the step S2, as Figure 8 shown, it may include but is not limited to the following steps and combinations of the following steps.

[0107] S7, obtain a second instruction, and determine whether the instruction includes a third flag.

[0108] Similarly, here the second instruction can be understood as, for example, the recognition module 10 continuously obtains flags after recognizing the first flag, and determines whether each obtained flag is the third flag. Step S7 can be considered that the display panel is in the power-saving mode, that is, at this time, it can be considered that the value of the electrical signal el generated by the electrical signal generation module 30 has been controlled by the power-saving control signal con and has decreased.

[0109] S8, if the second instruction includes the third flag, control the display panel to exit the power-saving mode.

[0110] Among them, the third flag can be but is not limited to the second frame blanking flag mentioned above (such as the second frame blanking flag CMD5). At this time, it can indicate that the display panel is about to end the frame blanking stage of a frame and is about to start the scanning stage of the next frame, that is, the demand for power consumption is about to increase. Therefore, the power-saving mode can be exited. Among them, the specific operation of exiting the power-saving mode can refer to the description of step S6 above.

[0111] Of course, in other embodiments, the first flag and the corresponding second flag, or rather, the first flag and the corresponding third flag, can also be understood as being used to characterize the start time and end time of line blanking, that is, the above-mentioned power-saving mode can also occur during the line blanking stage.

[0112] The present invention provides a display driving system, its driving method, and a display device. The display driving system includes at least one source driver and a power manager electrically connected to the source driver. The source driver includes: a recognition module for recognizing an instruction; a power-saving control module electrically connected to the recognition module for generating a power-saving control signal according to the instruction; wherein, the power manager includes an electrical signal generation module for generating an electrical signal and electrically connected to the power-saving control module for reducing the value of the generated electrical signal according to the power-saving control signal. Therefore, the power-saving control module can generate a power-saving control signal under an instruction corresponding to a working state with a lower demand for power consumption, and the electrical signal generation module for generating an electrical signal can reduce the value of the generated electrical signal according to this power-saving control signal, thereby achieving the purpose of power consumption saving.

[0113] The above has introduced in detail the display driving system, its driving method, and the display device provided by the embodiments of the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present invention; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display driving system, characterized in that, applied to a display panel, including at least one source driver and a power manager electrically connected to the source driver, the source driver includes: an identification module for identifying instructions; a power saving control module electrically connected to the identification module for generating a power saving control signal according to the instructions; wherein, the power manager includes an electrical signal generating module for generating an electrical signal and electrically connected to the power saving control module for reducing the value of the generated electrical signal according to the power saving control signal.

2. The display driving system according to claim 1, characterized in that, the power saving control module includes a plurality of switching elements arranged in parallel, a plurality of input ends of the plurality of switching elements are electrically connected and loaded with a working voltage, and a plurality of output ends of the plurality of switching elements are all electrically connected to the electrical signal generating module; wherein, the source driver further includes: a logic module electrically connected between the identification module and a plurality of control ends of the plurality of switching elements for controlling the opening and closing of the plurality of switching elements according to the instructions to control the power saving control module to generate the power saving control signal.

3. The display driving system according to claim 1, characterized in that, the display driving system is configured to: control the display panel to be in a scanning stage; control the display panel to be in a blanking stage; wherein, the value of the electrical signal generated by the electrical signal generating module in the blanking stage is less than the value of the electrical signal generated in the scanning stage.

4. The display driving system according to claim 3, characterized in that, the scanning stage includes a plurality of line scanning stages, and the blanking stage includes a plurality of line blanking stages and a frame blanking stage; in one frame, the line blanking stage is included between two adjacent line scanning stages, and the frame blanking stage is included between two corresponding scanning stages of two adjacent frames; wherein, the display driving system further includes: a timing controller for generating a line blanking flag in the line blanking stage and a frame blanking flag in the frame blanking stage; wherein, the instructions include at least one of the line blanking flag and the frame blanking flag.

5. The display driving system according to claim 4, characterized in that, the frame blanking flag includes a first frame blanking flag and a second frame blanking flag located after the first frame blanking flag; the source driver further includes: a timing module electrically connected between the identification module and the power saving control module for obtaining the interval between the first frame blanking flag and the second frame blanking flag to determine the frame blanking stage to control the power saving control module to generate the corresponding power saving control signal.

6. The display driving system according to claim 4, characterized in that, the blanking flag includes a first blanking flag and a third blanking flag located after the first blanking flag; the power saving control module is used for generating the corresponding power saving control signal according to the first blanking flag and the third blanking flag.

7. A display device, characterized in that, Comprising a display panel and a display driving system as claimed in any one of claims 1 to 6 electrically connected to the display panel.

8. A driving method of a display driving system, characterized in that, applied to a display panel, comprising: obtaining a first instruction and determining whether the first instruction includes a first flag; if the first instruction includes the first flag, generating a power saving control signal according to the first flag and reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter a power saving mode.

9. The method as claimed in claim 8, characterized in that, the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter a power saving mode includes: starting the first timing; after the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter a power saving mode, including: obtaining a second instruction and determining whether the second instruction includes a second flag; if the instruction includes the second flag, obtaining the first timing value of the first timing, clearing it and starting the second timing; obtaining the second timing value of the second timing and determining whether the second timing value and the first timing value satisfy a preset relationship; if the second timing value and the first timing value satisfy the preset relationship, controlling the display panel to exit the power saving mode.

10. The method as claimed in claim 8, characterized in that, after the step of reducing the value of the generated electrical signal according to the power saving control signal to control the display panel to enter a power saving mode, including: obtaining a second instruction and determining whether the instruction includes a third flag; if the second instruction includes the third flag, controlling the display panel to exit the power saving mode.

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