Method for performing energy-saving control on display device and related display equipment

Abstract

A method for performing energy-saving control on a display device, the method comprising: generating, by a timing controller of the display device, an energy-saving start indication and an energy-saving end indication in response to a change in an update rate of the display device; receiving, by a source driver of the display device, the energy-saving start indication and the energy-saving end indication; in response to the energy-saving start instruction, in a vertical blank interval, reducing power supply of a part of circuits of the source driver; and in response to the energy saving termination indication, waking up a part of circuits of the source driver with reduced power supply in the vertical blank interval.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a method for performing energy-saving control on a display device and a related display device. Background Art

[0002] Variable refresh rate (VRR) technology is used to dynamically adjust the refresh rate of a display device to match the displayed content. This means that when there are significant changes in the displayed content, such as fast-paced action in a video game, the refresh rate can be increased to obtain a smoother visual experience. Conversely, when the displayed content is relatively static, the refresh rate can be reduced to save energy. This adaptability improves the performance and efficiency of the display device, making it more flexible and changeable when handling different displayed content. On the other hand, the vertical blanking interval represents the pause period between consecutive image frames. During this period, the display device will pause the image update so that the display device can process and prepare the data for the upcoming image frame. In VRR technology, the length of the vertical blanking interval can be adjusted to adapt to different refresh rates. However, when the refresh rate is reduced, the vertical blanking interval will be extended accordingly. Since the display device is in an active state but does not generate actual benefits at this time, the extended vertical blanking interval may cause a waste of energy. Therefore, there is a need in the art for a power saving control mechanism on a display device that can effectively manage the extended vertical blanking interval. Summary of the invention

[0003] In view of this, one of the purposes of the present invention is to provide a power saving control method for a display device. The embodiment of the present invention allows a part of the circuit of the source driver in the display device to switch to the power saving mode during the vertical blanking interval. The switching of the power saving mode is triggered by a power saving start indication and terminated by a power saving end indication, both of which are generated by the timing controller of the display device. Based on this design, the present invention achieves an ideal balance between the performance and energy consumption of the display device.

[0004] An embodiment of the present invention provides a method for energy-saving control of a display device, the method comprising: in response to a change in a refresh rate of the display device, a timing controller of the display device generates a power-saving start indication and a power-saving termination indication; a source driver of the display device receives the power-saving start indication and the power-saving termination indication; in response to the power-saving start indication, a part of the circuit of the source driver is powered down during a vertical blanking interval; and in response to the power-saving termination indication, a part of the circuit of the source driver with the reduced power is awakened during the vertical blanking interval.

[0005] An embodiment of the present invention provides a display device, which includes: a timing controller and a source driver. The timing controller is used to generate a power saving start indication and a power saving end indication in response to a change in a refresh rate of the display device. The source driver is used to receive the power saving start indication and the power saving end indication, so as to reduce the power supply of a part of the circuit in response to the power saving start indication within a vertical blank interval; and wake up the part of the circuit with reduced power supply in response to the power saving end indication. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A display device including a timing controller and a source driver in an embodiment of the present invention is shown.

[0007] Figure 2 The relationship between the effective data interval and the vertical blanking interval is shown.

[0008] Figure 3 The first embodiment of the energy-saving control mechanism of the present invention is shown.

[0009] Figure 4 The second embodiment of the energy-saving control mechanism of the present invention is shown.

[0010] Figure 5 The third embodiment of the energy-saving control mechanism of the present invention is shown.

[0011] Figure 6 The fourth embodiment of the energy-saving control mechanism of the present invention is shown.

[0012] Figure 7 The fifth embodiment of the energy-saving control mechanism of the present invention is shown.

[0013] Figure 8 A flow chart showing a method for performing energy saving control on a display device in an embodiment of the present invention.

[0014] Description of reference numerals:

[0015] 10 Display Devices

[0016] 110 Timing Controller

[0017] 115 Signal pin

[0018] 117 Data Channel

[0019] 120 Source Driver

[0020] 122 HV Part

[0021] 124 LV part

[0022] 130 display area

[0023] Steps S210 to S240 DETAILED DESCRIPTION

[0024] In the following text, many specific details are described to provide readers with a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand how to implement the present invention without one or more specific details, or using other methods, components, materials, etc. In other cases, well-known structures, materials, or operations will not be shown or described in detail to avoid obscuring the core concepts of the present invention.

[0025] The reference to "an embodiment" in the specification means that the specific features, structures or characteristics described in the embodiment may be included in at least one embodiment of the present invention. Therefore, the "in an embodiment" that appears in various places in this specification does not necessarily mean the same embodiment. In addition, the aforementioned specific features, structures or characteristics may be combined in one or more embodiments in any suitable form.

[0026] Figure 1 The display device and its timing controller and source driver of the embodiment of the present invention are shown. As shown in the figure, the display device 10 includes a timing controller 110, a source driver 120 and a display area 130. Generally, the timing controller 110 acts as an intermediary between a video processing unit (not shown) and the source driver 120. Among them, the video processing unit generates image data, and the source driver 120 drives the physical pixels on the display area 130. The main function of the timing controller 110 is to coordinate the image data transmission process from the video processing unit to the source driver 120. The timing controller 110 controls when and how the image data is transmitted by generating various timing signals. The timing of these signals corresponds to the update rate of the display device 10 to ensure that the image data is transmitted to the source driver 120 at the correct time corresponding to each frame. On the other hand, the source driver 120 is responsible for converting the image data received from the timing controller 110 into an analog signal, and driving the physical pixels in the display area 130 accordingly. In short, the coordinated operation of the timing controller 110 and the source driver 120 ensures that the image data generated by the video processing unit can be accurately and efficiently displayed on the display area 130 .

[0027] Please refer to Figure 2, which shows the relationship between the active data interval and the vertical blanking interval in an embodiment of the present invention. Typically, each frame interval starts with a pulse of an STV signal (e.g., a vertical synchronization signal V-Sync) and includes an active data interval and a vertical blanking interval (VBK). The active data interval is a period during which a video signal containing actual image information is transmitted from the video processing unit to the source driver 120. During the active data interval, the timing controller 110 generates various timing signals to control when and how image data is transmitted. These timing signals ensure that the image data is transmitted to the source driver 120 at the correct time corresponding to each physical pixel. During the active data interval, the source driver 120 receives the image data from the timing controller 110 and converts it into analog signals. These analog signals correspond to the brightness and color information of each physical pixel and are used to drive the physical pixels.

[0028] During the vertical blanking interval, the timing controller 110 will stop sending valid pixel information (e.g., brightness and color information) to the source driver 120. However, during the vertical blanking interval, the timing controller 110 may send specific control commands or metadata, such as frame synchronization instructions, to the source driver 120. Also, during the vertical blanking interval, the source driver 120 will also stop receiving valid pixel information. Figure 2 As shown, when the refresh rate changes from 60 Hz to 40 Hz, the vertical blanking interval is significantly extended.

[0029] In view of this, the present invention allows the source driver 120 to reduce the power supply (or shut down) of the unused part of the circuit, thereby reducing the overall power consumption of the display device 10 when the refresh rate is reduced. In one embodiment, the source driver 120 includes a high-voltage (HV) part 122 and a low-voltage (LV) part 124. Generally, the LV part 124 includes components and circuits responsible for receiving and processing signals from the timing controller 110. On the other hand, the HV part 122 includes components and circuits responsible for driving the physical pixels in the display area 130. In various embodiments of the present invention, the LV part 124 and the HV part 122 of the source driver 130 can selectively reduce the power supply during the vertical blanking interval. In one embodiment, not all components and circuits of the HV part 122 can reduce the power supply in response to a lower refresh rate. For example, the CHOP circuit, CHOP bias circuit, ROP circuit and ROP bias circuit belonging to the HV part 122 of the source driver 120 can reduce the power supply in response to a lower refresh rate. However, the POFR circuit and the HV bandgap circuit of the HV portion 122 of the source driver 120 are not allowed to reduce the power supply in response to the lower update rate. In one embodiment, not all components and circuits of the LV portion 124 can reduce the power supply in response to the lower update rate. For example, the clock data recovery (CDR) circuit and the receiving circuit of the LV portion 124 of the source driver 120 can reduce the power supply in response to the lower update rate. However, the POFR circuit and the LV bandgap circuit of the LV portion 124 of the source driver 120 are not allowed to reduce the power supply in response to the lower update rate.

[0030] In the present invention, the energy saving event is initiated by the timing controller 110 in response to the refresh rate change. Based on the start of the vertical blanking interval, the timing controller 110 will generate an energy saving start indication to instruct the source driver 120 to switch to the energy saving state. Based on the end of the vertical blanking interval, the timing controller 110 will generate an energy saving end indication to instruct the source driver 120 to end the energy saving state.

[0031] Figure 3 1 shows a first embodiment of the energy-saving control mechanism of the present invention. In this embodiment, the timing controller 110 is used to notify the source driver 120 of energy-saving events (i.e., switching to an energy-saving state or ending an energy-saving state) through an energy-saving signal VDE. The energy-saving signal VDE is transmitted through a dedicated hardware signal pin (pin) 115, which connects the timing controller 110 and the source driver 120, providing a direct and efficient communication path between the timing controller 110 and the source driver 120. Figure 3As shown, at the beginning of the vertical blanking interval, the timing controller 120 de-asserts the power saving signal VDE as a power saving start indication (indicating the start of the power saving state). In response to the power saving start indication, the source driver 120 will reduce the power supply of the LV part 124 and / or the HV part 122. On the other hand, at the end of the vertical blanking interval, the timing controller 120 pulls up (asserts) the power saving signal VDE as a power saving termination indication (indicating the end of the power saving state). In response to the power saving termination indication, the source driver 120 will wake up (i.e., restart) the LV part 124 and / or the HV part 122 whose power supply was reduced during the previous power saving state.

[0032] Figure 4 A second embodiment of the energy-saving control mechanism of the present invention is shown. In this embodiment, the timing controller 110 is used to notify the source driver 120 of energy-saving events through different command types. First, the timing controller 110 sends a register setting (Register Setting Command) command to the source driver 120 through the data channel 117 as an energy-saving start indication (indicating the start of the energy-saving state). Assuming that the communication between the timing controller 110 and the source driver 120 is based on the Integrated-Stream Protocol (iSP), the register setting command may include a combination of a "BAC" command and a "Setting" command defined in the iSP protocol. Subsequently, the timing controller 110 sends a horizontal line start command (Horizontal Line Start Command) to the source driver 120 through the data channel 117 as an energy-saving termination indication (indicating the end of the energy-saving state). In the example based on the iSP protocol, the horizontal line start command may include a combination of a "BAC" command and a "POL" command defined in the iSP protocol.

[0033] like Figure 4As shown, in the valid data interval, the timing controller 110 sends a combination of a "BAC" command and a "POL" command before sending valid data for each horizontal pixel line data of the display area 130. After the valid data interval ends and the vertical blank interval begins, the timing controller 110 sends a combination of a "BAC" command and a "Setting" command as an energy-saving start indication, thereby indicating the start of the energy-saving state. In response to the combination of the "BAC" command and the "Setting" command, the source driver 120 will reduce the power supply of the HV part 124. During the entire vertical blank interval, the timing controller 110 sends a combination of a "BAC" command and a "BKPOL" command to the source driver 120. With the arrival of the next frame, the timing controller 110 will end the energy-saving state. Accordingly, the timing controller 110 sends a combination of a "BAC" command and a "POL" command at the end of the vertical blank interval as an energy-saving termination indication to notify the source driver 120 (indicating the end of the energy-saving state). In response to the combination of the "BAC" command and the "POL" command received during the vertical blanking interval, the source driver 120 will wake up (i.e., restart) the HV portion 124 that was powered down during the previous power saving state. In addition, in different embodiments of the present invention, the timing controller 110 can send a register setting command to the source driver 120 as a power saving start indication, and send dummy vertical blanking line data (Dummy Vertical Blanking Line Data) to the source driver 120 as a power saving termination indication.

[0034] Figure 5 The third embodiment of the energy-saving control mechanism of the present invention is shown. In this embodiment, the timing controller 110 uses a specific number of commands to notify the source driver 120 of energy-saving events. The timing controller 110 sends a series of line commands (Line Command) through the data channel 117 to perform energy-saving control. The energy-saving start indication can be represented by a first number of line commands, and the energy-saving termination indication can be represented by a second number of line commands. Assuming that the communication between the timing controller 110 and the source driver 120 is based on the iSP protocol, the line command may be a combination of a "BAC" command and a "Setting" command, as well as a combination of a "BAC" and a "POL" command defined in the iSP protocol.

[0035] like Figure 5As shown, for the display area 130 with a resolution of 3840x2160, the timing controller 110 sends 2160 combinations of "BAC" commands and "POL" commands within the valid data interval. Each of the combinations of "BAC" commands and "POL" commands is associated with valid data of a single horizontal pixel line of the display area 130. Within the valid data interval, the timing controller 110 sends 2160 line commands. After the valid data interval ends and the vertical blank interval begins, the timing controller 110 sends a combination of "BAC" commands and "Setting" commands to the source driver 120 as a power saving start indication (indicating the start of the power saving state). The combination of "BAC" commands and "Setting" commands is also the "2161th" line command.

[0036] On the other hand, the source driver 120 includes a counter for counting the number of line commands received within a frame interval (Frameinterval) (i.e., a combination of a "BAC" command and a "Setting" command, and a combination of a "BAC" command and a "POL" command). In response to the "2161st" line command, the source driver 120 will reduce the power supply of the HV part 124. After that, the timing controller 110 continues to send line commands to the source driver 120 (i.e., a combination of a "BAC" command and a "POL" command). Throughout the vertical blanking interval, the timing controller 110 continues to send line commands to the source driver 120. Once the counter of the source driver 120 shows that the "2202nd" line command has been received, the source driver 120 will wake up (i.e., restart) the HV part 124 whose power supply was previously reduced. Please note that the specific numbers mentioned in the above description (e.g., "2161st" and "2202nd") are for illustrative purposes only and should not be regarded as limitations of the present invention. According to various embodiments of the present invention, the source driver 120 may respond to different numbers of line commands to reduce the power supply of the HV portion 124 and / or wake up the HV portion 124. In addition, in various embodiments of the present invention, the timing controller 110 may send a register setting command to the source driver 120 as a power saving start indication, and send a specific number of dummy vertical blanking line data to the source driver 120 as a power saving termination indication.

[0037] Figure 6 FIG. 4 shows a fourth embodiment of the energy saving control mechanism of the present invention. In this embodiment, the timing controller 110 notifies the source driver 120 of the energy saving event by changing the common mode voltage on the data channel 117. Figure 6As shown, at the beginning of the vertical blanking interval, the timing controller 110 adjusts the common mode voltage VCM on the data channel 117 to be reduced to below 0.2V as an energy saving start indication (indicating the start of the energy saving state). In response to the energy saving start indication, the source driver 120 will reduce the power supply of the LV part 124 and / or the HV part 122. On the other hand, at the end of the vertical blanking interval, the timing controller 110 increases the common mode voltage VCM on the data channel 117 to more than 0.2V as an LV energy saving termination indication (indicating the end of the energy saving state of the LV part 124). In response to the LV energy saving termination indication, the source driver 120 will wake up (i.e., restart) the clock data recovery (CDR) circuit and / or the receiving circuit in the LV part 124 whose power supply is reduced. After the timing controller 110 increases the common mode voltage VCM on the data channel 117 to more than 0.2V, the timing controller 110 transmits the training data to the source driver 120 at the end of the vertical blanking interval. Based on the training data transmitted from the timing controller 110 , the awakened CDR circuit and / or receiving circuit in the source driver 120 will lock the operating clock of the timing controller 110 based on the CDR mechanism. In this way, the source driver 120 can be synchronized with the timing controller 110 .

[0038] In addition, the source driver 120 is used to wake up (i.e., restart) the previously powered-down HV part 122 after locking the operation clock of the timing controller 110. That is, the power saving termination indication is based on the frequency locking state of the source driver 120. Once the source driver 120 and the timing controller 110 lock the operation clock, the source driver 120 can detect that the voltage level of the negative signal line (N) on the data channel 117 is lower than the voltage level of the positive signal line (P).

[0039] Figure 7 FIG. 5 shows a fifth embodiment of the energy saving control mechanism of the present invention. In this embodiment, the timing controller 110 is used to notify the source driver 120 of energy saving events through different line configuration commands. Figure 7As shown, at the beginning of the vertical blanking interval, the timing controller 110 sends a vertical blanking start command (Vertical Blanking Start Command) to the source driver 120 through the data channel 117 as an energy-saving start indication (indicating the start of the energy-saving state). Assuming that the communication between the timing controller 110 and the source driver 120 is based on the Unified Standard Interface for TV (USI-T) protocol, the vertical blanking start command may be a "VSTR" command defined by the USI-T protocol. In response to the "VSTR" command, the source driver 120 will reduce the power supply of the HV part 124. On the other hand, at the end of the vertical blanking interval, the timing controller 110 sends a frame start command (Frame Start Command) to the source driver 120 through the data channel 117 as an energy-saving termination indication (indicating the end of the energy-saving state). In the example of the USI-T protocol, the frame start command may be an "FSTR" command defined in the USI-T protocol. In response to the “FSTR” command, the source driver 120 will wake up (ie, restart) the previously powered down HV portion 124 .

[0040] Figure 8 A flow chart of a method for performing energy saving control on a display device in an embodiment of the present invention is shown. As shown in the figure, the method of the present invention includes the following simplified process:

[0041] Step S210: In response to a change in a refresh rate of the display device, a timing controller of the display device generates a power saving start indication and a power saving end indication;

[0042] Step S220: receiving the energy saving start instruction and the energy saving end instruction by a source driver of the display device;

[0043] Step S230: In response to the energy saving start indication, in a vertical blanking interval, reducing the power supply of a part of the circuit of the source driver; and

[0044] Step S240: In response to the power saving termination instruction, wake up a portion of the source driver circuit with reduced power supply during the vertical blanking interval.

[0045] Since the principles and specific details of the above steps have been described in detail through the above embodiments, they will not be repeated here. It should be noted that the above method flow can be enhanced by adding other additional steps or making appropriate modifications and adjustments to improve the performance of the display device 10 and further improve the energy efficiency of the display device 10.

[0046] In summary, the present invention provides an energy-saving control mechanism that can effectively reduce the power consumption of a source driver of a display device at a low refresh rate.

[0047] The embodiments of the present invention may be specifically implemented as an apparatus, method or computer program product. Accordingly, the embodiments of the present invention may take the form of an entity implemented entirely by hardware, an entity implemented entirely by software (including firmware, resident software, microcode, etc.), or an entity combining software and hardware aspects, which may be generally referred to as a "module" or "system". In addition, the embodiments of the present invention may take the form of a computer program product embodied in any tangible expression medium, and the medium has a computer-usable program code embodied in the medium. In terms of hardware, the present invention may be implemented by applying any of the following technologies or related combinations: separate operation logic of a logic gate capable of executing a logic function according to a data signal, and an application specific integrated circuit (ASIC), a programmable gate array (PGA) or a field programmable gate array (FPGA) with appropriate combinational logic.

[0048] Flowcharts and block diagrams illustrate the architecture, functions and operations of the system, method and computer program product of different possible implementation methods of the embodiment of the present invention. In this regard, each block in the flow chart or block diagram may represent a module, section or a portion of program code, including one or more executable instructions to implement a specific logic function. It should also be noted that each block in the block diagram and / or flow chart, and the block combination in the block diagram and / or flow chart can be implemented by a special-purpose hardware base system, or a combination of special hardware and computer program instructions. These computer program instructions can be stored in a readable computer medium to command a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the readable computer medium generate functions / operations specified in the blocks or block combinations that include implementing the flow chart and / or block diagram.

[0049] The above descriptions are only preferred embodiments of the present invention. All equivalent changes and modifications made according to the claims of the present invention should fall within the scope of the present invention.

Claims

1. A method for energy-saving control of a display device, comprising: In response to a change in a refresh rate of the display device, a timing controller of the display device generates a power saving start indication and a power saving end indication; A source driver of the display device receives the energy saving start instruction and the energy saving end instruction; In response to the energy saving start indication, reducing the power supply of a part of the circuit of the source driver during a vertical blanking interval; and In response to the power saving termination indication, a portion of the circuit of the source driver with reduced power supply is awakened during the vertical blanking interval.

2. The method of claim 1, wherein the step of reducing the power supply of a part of the circuit of the source driver comprises: In response to the energy saving start indication, a high voltage partial circuit and / or a low voltage partial circuit in the source driver is caused to reduce power supply; and the steps of waking up a partial circuit of the source driver include: In response to the energy saving termination indication, the high voltage circuit portion and / or the low voltage circuit portion whose power supply is reduced is awakened.

3. The method of claim 1, wherein the step of generating the energy saving start indication and the energy saving end indication comprises: The power saving start indication is generated by lowering a power saving signal on a dedicated signal pin between the timing controller and the source driver; and The power saving termination indication is generated by raising the power saving signal on the dedicated signal pin between the timing controller and the source driver.

4. The method of claim 1, wherein the step of generating the energy saving start indication and the energy saving end indication comprises: Generating the power saving start indication by sending a register setting command from the timing controller to the source driver; and The energy saving termination indication is generated by sending a horizontal line start command from the timing controller to the source driver.

5. The method of claim 4, wherein the register setting command is a combination of a BAC command and a Setting command defined by the integrated stream protocol, and the horizontal line start command is a combination of the BAC command and a POL command defined by the integrated stream protocol.

6. The method of claim 1, wherein the step of generating the energy saving start indication and the energy saving end indication comprises: The power saving start indication and the power saving end indication are generated by sending a specific number of line commands to the source driver within the vertical blanking interval.

7. The method of claim 6, wherein the line command is a combination of a BAC command and a Setting command defined by the integrated stream protocol, and a combination of the BAC command and a POL command defined by the integrated stream protocol.

8. The method of claim 1, wherein the step of generating the energy saving start indication and the energy saving end indication comprises: The energy-saving start indication and the energy-saving end indication are generated by adjusting a common-mode voltage on a data channel between the timing controller and the source driver.

9. The method of claim 8, wherein the step of adjusting the common mode voltage on the data channel between the timing controller and the source driver comprises: Generating the power saving start indication by reducing the common mode voltage on the data channel to a level below a predetermined threshold value; and The energy saving termination indication is generated according to a frequency locking state of the source driver.

10. The method of claim 1, wherein the step of generating the energy saving start indication and the energy saving end indication comprises: Generating the power saving start indication by sending a vertical blank start command from the timing controller to the source driver; and The energy saving termination indication is generated by sending a frame start command from the timing controller to the source driver.

11. A display device comprising: a timing controller for generating a power saving start indication and a power saving end indication in response to a change in a refresh rate of the display device; and A source driver is used to receive the energy saving start indication and the energy saving end indication, so as to reduce the power supply of a part of the circuit in response to the energy saving start indication within a vertical blanking interval; and wake up the part of the circuit with reduced power supply in response to the energy saving end indication.

12. A display device as described in claim 11, wherein the source driver is used to respond to the energy-saving start indication to reduce the power supply of a high-voltage partial circuit and / or a low-voltage partial circuit in the source driver; and the source driver is used to respond to the energy-saving termination indication and wake up the high-voltage partial circuit and / or the low-voltage partial circuit with reduced power supply.

13. The display device as claimed in claim 11, wherein the timing controller is used for: The power saving start indication is generated by lowering a power saving signal on a dedicated signal pin between the timing controller and the source driver; and The power saving termination indication is generated by raising the power saving signal on the dedicated signal pin between the timing controller and the source driver.

14. The display device according to claim 11, wherein the timing controller is used for: Generating the power saving start indication by sending a register setting command to the source driver; and The energy saving termination indication is generated by sending a horizontal line start command to the source driver.

15. The display device as claimed in claim 14, wherein the register setting command is a combination of a BAC command and a Setting command defined by the integrated stream protocol, and the horizontal line start command is a combination of the BAC command and a POL command defined by the integrated stream protocol. 16 . The display device of claim 11 , wherein the timing controller is used to generate the power saving start indication and the power saving end indication by sending a specific number of line commands to the source driver within the vertical blanking interval.

17. The display device of claim 16, wherein the line command is a combination of a BAC command and a Setting command defined by the integrated stream protocol, and a combination of the BAC command and a POL command defined by the integrated stream protocol. 18 . The display device as claimed in claim 11 , wherein the timing controller is used to generate the power saving start indication and the power saving end indication by adjusting a common mode voltage on a data channel between the timing controller and the source driver.

19. The display device according to claim 18, wherein the timing controller is used for: Generating the power saving start indication by reducing the common mode voltage on the data channel to a level below a predetermined threshold value; and The energy saving termination indication is generated according to a frequency locking state of the source driver.

20. The display device according to claim 11, wherein the timing controller is used for: Generating the power saving start indication by sending a vertical blank start command to the source driver; and The energy saving termination indication is generated by sending a frame start command to the source driver.

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