Display driver and driving method thereof, display device

Abstract

Provided are a display driver and a driving method thereof, and a display device, and the technical field belongs to display technology. The display driver comprises at least one control circuit and a plurality of output circuits. The control circuit can control the on-off of a plurality of function power supply ends and a control power supply end based on control signals provided by a plurality of first control ends. The output circuit can control the on-off of a plurality of input power supply ends and a signal output end coupled to a pixel based on control signals provided by a plurality of second control ends, and the plurality of input power supply ends comprise the control power supply end. Furthermore, at least two output circuits share a control power supply end coupled to a control circuit. As such, the control circuit and the output circuit can cooperate with each other to control the on-off of the plurality of function power supply ends and the pixel, thereby achieving the purpose of driving the pixel to emit light in different modes. Furthermore, the number of switches and control signals required to be set in the display driver can be reduced, the size of the chip can be prevented from being large, and the working power consumption can be small.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display driver and its driving method, and a display device. Background Technology

[0002] In the field of display technology, a display device generally includes a display driver and a display panel with multiple pixels. The display driver is coupled to the multiple pixels and is used to drive the multiple pixels to emit light.

[0003] In related technologies, to minimize the power consumption of display devices and accelerate driving, the display driver needs to be configured to operate in multiple modes, such as pre-charging mode, charge-sharing mode, over-driving mode, and under-driving mode. Currently, this is typically achieved by setting up numerous switches to connect power supply terminals capable of implementing these multiple modes (e.g., the pre-charging power supply terminal for pre-charging mode) one-to-one to the display driver, allowing the display driver to perform the corresponding functions, thereby reducing the power consumption of the display device and accelerating driving.

[0004] However, with a large number of switches, the size of the chip in the display driver needs to be increased accordingly, and each switch needs to be provided with a separate control signal, resulting in higher power consumption. Summary of the Invention

[0005] A display driver and its driving method, as well as a display device, are provided, which can solve the problem in related technologies where a large number of switches are required to achieve multiple modes, resulting in a large chip size and high power consumption in the display driver. The technical solution is as follows:

[0006] On one hand, a display driver is provided for use in a display panel, the display panel including a plurality of pixels; the display driver includes:

[0007] At least one control circuit, each of the control circuits being coupled to a plurality of functional power terminals, a plurality of first control terminals corresponding one-to-one with the plurality of functional power terminals, and a control power terminal; each of the control circuits is used to control the on / off state of the functional power terminal corresponding to the first control terminal and the control power terminal based on a first control signal provided by each first control terminal.

[0008] Multiple output circuits are provided, each of which is coupled to multiple input power terminals, multiple second control terminals corresponding to each of the multiple input power terminals, and at least one signal output terminal. The multiple signal output terminals coupled to the multiple output circuits are used to couple to the multiple pixels. Each output circuit is used to control the on / off state of the input power terminal corresponding to the second control terminal and the at least one signal output terminal based on a second control signal provided by each second control terminal.

[0009] The plurality of functional power terminals include at least two of the following: a pre-charge power terminal, a drive power terminal, and a pull-down power terminal; the plurality of input power terminals include a first power terminal, a second power terminal, and the control power terminal; and at least two output circuits share the same control power terminal coupled to the same control circuit, and at least two output circuits share the same first power terminal and / or share the same second power terminal.

[0010] Optionally, the plurality of functional power terminals include: a pre-charge power terminal, a drive power terminal, and a pull-down power terminal.

[0011] Optionally, at least one of the control circuits is further coupled to a third control terminal and is used to control the on / off state of the functional power supply terminal corresponding to the first control terminal and the control power supply terminal based on a first control signal provided by each of the first control terminals and a third control signal provided by the third control terminal.

[0012] Optionally, the control circuit includes: a first control sub-circuit and a second control sub-circuit;

[0013] The first control sub-circuit is coupled to the plurality of functional power terminals, the plurality of first control terminals corresponding to the plurality of functional power terminals, and the output node respectively; the first control sub-circuit is used to control the on / off state of the functional power terminal corresponding to the first control terminal and the output node based on the first control signal provided by each first control terminal.

[0014] The second control sub-circuit is coupled to the third control terminal, the output node, and the control power supply terminal respectively; the second control sub-circuit is used to control the on / off state of the output node and the control power supply terminal based on the third control signal provided by the third control terminal.

[0015] Optionally, the first control sub-circuit includes: a plurality of first switches corresponding one-to-one with the plurality of first control terminals and the plurality of functional power terminals;

[0016] The control terminal of each first switch is coupled to the corresponding first control terminal, the input terminal of each first switch is coupled to the corresponding functional power supply terminal, and the output terminal of each first switch is coupled to the output node.

[0017] Optionally, the second control sub-circuit includes: a second switch;

[0018] The control terminal of the second switch is coupled to the third control terminal, the input terminal of the second switch is coupled to the output node, and the output terminal of the second switch is coupled to the control power supply terminal.

[0019] Optionally, the pre-charge power supply terminal includes: a first pre-charge power supply terminal and a second pre-charge power supply terminal; the drive power supply terminal includes: a first drive power supply terminal and a second drive power supply terminal; the control power supply terminal includes: a first control power supply terminal and a second control power supply terminal; the control circuit includes: two first control sub-circuits, and two second control sub-circuits corresponding one-to-one with the two first control sub-circuits.

[0020] A first control subcircuit is coupled to multiple functional power terminals, including at least two of the following: a first pre-charge power terminal, a first drive power terminal, and a pull-down power terminal; and a second control subcircuit corresponding to the first control subcircuit is coupled to the first control power terminal.

[0021] The other first control sub-circuit is coupled to multiple functional power terminals, including at least two of the second pre-charge power terminal, the second drive power terminal, and the pull-down power terminal; and, the other second control sub-circuit corresponding to the other first control sub-circuit is coupled to the second control power terminal.

[0022] Wherein, the potential of the first pre-charge power signal provided by the first pre-charge power terminal is greater than the potential of the second pre-charge power signal provided by the second pre-charge power terminal; the potential of the first drive power signal provided by the first drive power terminal is greater than the potential of the second drive power signal provided by the second drive power terminal; and the potential of the first pre-charge power signal is located between the potential of the first drive power signal and the potential of the pull-down power signal provided by the pull-down power terminal, and the potential of the second pre-charge power signal is located between the potential of the second drive power signal and the potential of the pull-down power signal.

[0023] Optionally, the multiple output circuits share the same control power supply terminal coupled to the same control circuit, and each pair of adjacent output circuits is coupled one-to-one with the first control power supply terminal and the second control power supply terminal included in the control power supply terminal.

[0024] Optionally, the display driver further includes: a switch control circuit;

[0025] The switch control circuit is coupled to the plurality of first control terminals, the plurality of second control terminals, and the third control terminal respectively; the switch control circuit is used to provide a first control signal to the first control terminal, a second control signal to the second control terminal, and a third control signal to the third control terminal.

[0026] Optionally, each of the output circuits includes: a plurality of third switches corresponding one-to-one with the plurality of second control terminals and the plurality of input power terminals;

[0027] The control terminal of each of the third switches is coupled to the corresponding second control terminal, the input terminal of each of the third switches is coupled to the corresponding input power supply terminal, and the output terminal of each of the third switches is coupled to the corresponding at least one signal output terminal.

[0028] Optionally, the plurality of output circuits are divided into a plurality of output circuit groups, each output circuit group including two adjacent output circuits, and each output circuit group including different output circuits.

[0029] Each output circuit group shares the same first power supply terminal and the same second power supply terminal.

[0030] Optionally, the plurality of pixel arrays are arranged in a specific pattern;

[0031] The plurality of output circuits are coupled one-to-one with the plurality of signal output terminals, and the plurality of signal output terminals are used to be coupled one-to-one with the plurality of columns of pixels.

[0032] Optionally, the display driver further includes:

[0033] An amplifier is coupled to the first power supply terminal, the second power supply terminal, and the output circuit, respectively, and is used to amplify the first power signal provided by the first power supply terminal and transmit it to the output circuit, and to amplify the second power signal provided by the second power supply terminal and transmit it to the output circuit.

[0034] On the other hand, a driving method for a display driver is provided, applied to a display driver as described in the above aspect; the method includes:

[0035] In response to the pre-charge mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pre-charge power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each control circuit controls the pre-charge power supply terminal to be connected to the control power supply terminal based on the first control signal.

[0036] In response to the overdrive mode, a first control signal with a first potential is provided to the first control terminal corresponding to the drive power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each of the control circuits controls the drive power supply terminal to be connected to the control power supply terminal based on the first control signal.

[0037] In response to the underdriven mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pull-down power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each of the control circuits controls the pull-down power supply terminal to be connected to the control power supply terminal based on the first control signal.

[0038] In response to the charging sharing mode, a first control signal with a second potential is provided to each first control terminal, and each control circuit controls each functional power terminal to disconnect from the control power terminal based on the first control signal;

[0039] Furthermore, in the pre-charging mode and the charging sharing mode, a second control signal with a first potential is sequentially provided to multiple second control terminals, and each output circuit controls the first power terminal, the second power terminal, and the control power terminal to be sequentially connected to at least one signal output terminal based on the second control signal;

[0040] In addition, in the overdrive mode and the underdrive mode, a second control signal with a second potential is provided to a second control terminal corresponding to one of the first power supply terminal and the second power supply terminal, and a second control signal with a first potential is provided to the remaining second control terminals in sequence. Each output circuit controls the control power supply terminal based on the second control signal, and the other power supply terminal of the first power supply terminal and the second power supply terminal is sequentially turned on with the at least one signal output terminal.

[0041] In another aspect, a display device is provided, the display device comprising: a display panel, and a display driver as described in the preceding aspect;

[0042] The display panel includes a plurality of pixels; the display driver is coupled to the plurality of pixels and is used to drive the plurality of pixels to emit light.

[0043] In summary, the beneficial effects of the technical solutions provided by the embodiments of this disclosure can at least include:

[0044] A display driver and its driving method, as well as a display device, are provided. The display driver includes at least one control circuit and multiple output circuits. Each control circuit can control the on / off state of multiple coupled functional power terminals and a control power terminal based on control signals provided by multiple coupled first control terminals, with each of the multiple first control terminals corresponding one-to-one with the multiple functional power terminals. Each output circuit can control the on / off state of multiple coupled input power terminals and the signal output terminal of a coupled pixel based on control signals provided by multiple coupled second control terminals, with each of the multiple second control terminals corresponding one-to-one with the multiple input power terminals, and the multiple input power terminals including at least the control power terminal. Furthermore, at least two output circuits share a control power terminal coupled to a single control circuit. Thus, the control circuit and output circuits can cooperate to control the on / off state of multiple functional power terminals and pixels, achieving the purpose of driving pixels to emit light using different modes. This reduces the number of switches and control signals required in the display driver, avoids a large chip size in the display driver, and reduces the operating power consumption of the display driver. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this disclosure;

[0047] Figure 2 This is a schematic diagram of the structure of a display driver provided in an embodiment of this disclosure;

[0048] Figure 3 This is a schematic diagram of another display driver structure provided in an embodiment of this disclosure;

[0049] Figure 4 This is a schematic diagram of the structure of another display driver provided in this embodiment;

[0050] Figure 5 This is a schematic diagram of another display driver provided in an embodiment of the present disclosure;

[0051] Figure 6 This is a schematic diagram of another display driver provided in an embodiment of the present disclosure;

[0052] Figure 7 This is a timing diagram of a display driver in precharge mode according to an embodiment of this disclosure;

[0053] Figure 8 This is a timing diagram of a display driver in a charge-sharing mode according to an embodiment of this disclosure;

[0054] Figure 9 This is a timing diagram of a display driver in overdrive mode according to an embodiment of this disclosure;

[0055] Figure 10 This is a timing diagram of a display driver in underdriven mode according to an embodiment of this disclosure;

[0056] Figure 11 This is a flowchart of a display driver driving method provided in an embodiment of this disclosure;

[0057] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0059] This disclosure provides a display driver integrated circuit (DDI) that can achieve the various modes described in the background art by setting a small number of switches. Consequently, the chip size in the DDI can be reduced, and the control signals required to control the switches can be decreased, thereby reducing power consumption.

[0060] The display driver provided in this disclosure can be applied to... Figure 1 The display panel 10 shown may include a plurality of pixels P1.

[0061] Figure 2 This is a schematic diagram of the structure of a display driver provided in an embodiment of this disclosure. Figure 2 As shown, the display driver includes at least one control circuit 01 and multiple output circuits 02.

[0062] Each control circuit 01 is coupled (i.e. electrically connected) to multiple functional power supply terminals, multiple first control terminals Sw1 corresponding to each of the multiple functional power supply terminals, and a control power supply terminal ConV. Each control circuit 01 is used to control the on / off state of the functional power supply terminal and the control power supply terminal ConV corresponding to each first control terminal Sw1 based on a first control signal provided by each first control terminal Sw1.

[0063] Among them, continue to refer to Figure 2It can be seen that multiple functional power terminals may include at least two of the following: a pre-charge power terminal (Pre-Charge V), a drive power terminal (VDD), and a pull-down power terminal (GND). For example, Figure 2 The functional power terminals shown include the pre-charge power terminal (Pre-Charge V), the drive power terminal (VDD), and the pull-down power terminal (GND). Correspondingly, as... Figure 2 As shown, the control circuit 01 can be coupled to three first control terminals Sw1. To distinguish these multiple first control terminals Sw1, the first switch terminal Sw1 corresponding to the drive power supply terminal VDD is labeled Sw1-1; the first switch terminal Sw1 corresponding to the pull-down power supply terminal GND is labeled Sw1-2; and the first switch terminal Sw1 corresponding to the pre-charge power supply terminal Pre-Charge V is labeled Sw1-3. The following embodiments are similar and will not be described again.

[0064] Furthermore, taking the Pre-Charge V power supply terminal as an example, the control circuit 01 can control the potential of the first control signal provided by the first control terminal Sw1-3 corresponding to the Pre-Charge V power supply terminal, and the potentials of the first control signal provided by the first control terminal Sw1-1 and the first control signal provided by the first control terminal Sw1-2 are both the second potential. In this case, only the Pre-Charge V power supply terminal is connected to the control power supply terminal ConV, while the drive power supply terminal VDD and the pull-down power supply terminal GND are not connected to the control power supply terminal ConV, thus disconnecting the coupling. This ensures that only the Pre-Charge V power supply terminal provides a pre-charging power signal to the control power supply terminal ConV. The control logic for other functional power supplies is similar and will not be elaborated here. In other words, by flexibly setting the first control signals provided by multiple first control terminals Sw1, only one functional power terminal (e.g., Pre-Charge V, drive power VDD, and pull-down power GND) will be connected to the control power terminal ConV at the same time. In other words, the control circuit 01 will not simultaneously control two or more functional power terminals to be connected to the control power terminal ConV.

[0065] Optionally, in this embodiment, the first potential can be an effective potential, and the second potential can be an ineffective potential. It should be noted that the effective and ineffective potentials here only represent that the signal has two potential states, and do not mean that the effective or ineffective potentials have specific values ​​throughout the text. Furthermore, the first potential can be higher than the second potential. Of course, in some other embodiments, the first potential can be lower than the second potential. Since the control circuit 01 controls one of the multiple functional power supply terminals to be connected to the control power supply terminal ConV during the same time period, based on the above control logic, it can be known that during the same time period, among the multiple first control terminals Sw1, only one first control terminal Sw1 provides a first control signal with a first potential of the first potential. Of course, during the same time period, the potentials of the first control signals provided by each first control terminal Sw1 can simultaneously be the second potential.

[0066] Each output circuit 02 is coupled to multiple input power terminals, multiple second control terminals Sw2 corresponding to each of the multiple input power terminals, and at least one signal output terminal Out. The multiple signal output terminals Out coupled to the multiple output circuits 02 can be used to... Figure 1 The multiple pixels P1 shown are coupled together. Each output circuit 02 is used to control the on / off state of the input power terminal corresponding to the second control terminal Sw2 and at least one coupled signal output terminal Out based on the second control signal provided by each second control terminal Sw2.

[0067] For example, refer to Figure 1 Multiple pixels P1 can be arranged in an array using rows and columns. Based on this, combined with... Figure 1 and Figure 2 Each output circuit 02 can be coupled to one signal output terminal Out. That is, multiple output circuits 02 can be coupled to multiple signal output terminals Out in a one-to-one correspondence, and multiple signal output terminals Out can be coupled to multiple columns of pixels P1 in a one-to-one correspondence. Figure 1 The four signal output terminals, Out, are schematically marked: Out <n>Out<N+1> Out<N+2> and Out<N+3> N is an integer greater than 0.

[0068] Among them, continue to refer to Figure 2 It can be seen that the multiple input power terminals may include: a first power terminal VH, a second power terminal VL, and a control power terminal ConV. That is, each output circuit 02 can be coupled to three input power terminals: the first power terminal VH, the second power terminal VL, and the control power terminal ConV. Furthermore, each output circuit 02 can be indirectly coupled to the control circuit 01 through the control power terminal ConV. Correspondingly, as... Figure 2 As shown, the output circuit 02 can be coupled to three second control terminals Sw2 corresponding to the three input power supply terminals. To distinguish these three second control terminals Sw2, the second control terminal Sw2 corresponding to the control power supply terminal ConV is labeled Sw2-1, and the two second control terminals Sw2 corresponding to the first power supply terminal VH and the second power supply terminal VL are labeled Sw2-2 and Sw2-3, respectively. The following embodiments are similar and will not be described again.

[0069] Furthermore, taking the control power terminal ConV as an example, the output circuit 02 can control the first power terminal VH, the second power terminal VL, and the control power terminal ConV. Only the power terminal ConV is controlled to be connected to the signal output terminal Out. This allows the functional power terminal connected to ConV (e.g., the pre-charge power terminal Pre-Charge V) to indirectly connect to the signal output terminal Out, thereby enabling the functional power terminal connected to ConV to transmit the pre-charge power signal to the pixel P1 coupled to the signal output terminal Out. The control logic for other input power terminals is similar.

[0070] Furthermore, in this embodiment, at least two output circuits 02 can share (also called multiplex) the same control power supply terminal ConV coupled to the same control circuit 01, or they can be considered to share a single control power supply terminal ConV. Also, at least two output circuits 02 can share the same first power supply terminal VH and / or the same second power supply terminal VL. Taking the second power supply terminal VL as an example, at least two output circuits 02 sharing the same second power supply terminal VL means that at least two output circuits 02 are coupled to the same second power supply terminal VL. The sharing of power supplies between at least two output circuits 02 and other power supplies is similar and will not be described in detail here.

[0071] For example, refer to Figure 2 The display driver shown includes only one control circuit 01, and multiple output circuits 02 are all coupled to the same control power supply terminal ConV, which is also coupled to the same control circuit 01. In other words, multiple output circuits 02 share the same control power supply terminal ConV. Furthermore, in the display driver shown, every two adjacent output circuits 02 are coupled to the same first power supply terminal VH and the same second power supply terminal VL, meaning that every two adjacent output circuits 02 share the same first power supply terminal VH and the same second power supply terminal VL. This reduces the number of power supply terminals required in the display driver, further avoiding a large chip size.

[0072] That is, in this embodiment of the present disclosure, by setting a small number of control circuits 01, and flexibly controlling the first control signal and the second control signal, one of the power terminals of the pre-charge power terminal Pre-Charge V, the driving power terminal VDD and the pull-down power terminal GND can be indirectly connected to multiple pixels P1 at the same time to drive multiple pixels P1 to emit light.

[0073] In this scenario, when the Pre-Charge V terminal is connected to pixel P1, it can transmit a pre-charge power signal with a specific voltage specification to P1. By flexibly configuring this pre-charge power signal, pixel P1 can be quickly lit up to the required brightness, accelerating output and reducing power consumption. In this scenario, the display driver can be considered to have entered Pre-Charging Mode. Similarly, when the Drive Power VDD terminal is connected to pixel P1, it can transmit a drive power signal to P1. By flexibly configuring this drive power signal, overdriving of pixel P1 can be achieved, also enabling P1 to be quickly lit up to the required brightness, accelerating output and reducing power consumption. In this scenario, the display driver can be considered to have entered Over-Driving Mode. When the pull-down power supply terminal GND is connected to pixel P1, GND can transmit a pull-down power signal to pixel P1. By flexibly configuring this pull-down power signal, underdriving of pixel P1 can be achieved, allowing it to be quickly lit to the required brightness, accelerating output and reducing power consumption. In this scenario, the display driver can be considered to have entered under-driving mode. When the pre-charge power supply terminal Pre-Charge V, the drive power supply terminal VDD, and the pull-down power supply terminal GND are all disconnected from pixel P1, one end of pixel P1 can be in a floating state. At this time, all pixels P1 can share charge, correspondingly reducing power consumption. In this scenario, the display driver can be considered to have entered charge-sharing mode.

[0074] In related technologies, a separate switch is typically used to connect to pixel P1 for each functional power supply terminal. Consequently, the size of the chip in the display driver increases, and each switch requires a separate control signal, resulting in a high overall power consumption of the display driver. However, in this embodiment, by setting up a display driver that includes at least one control circuit and multiple output circuits, and by setting at least two output circuits to share a control power supply terminal coupled to the same control circuit, different functional power supplies can be reliably connected to the pixel with fewer control terminals. This not only reduces the chip size but also reduces the required control signals, thus avoiding a high overall power consumption of the display driver.

[0075] In summary, this disclosure provides a display driver. The display driver includes at least one control circuit and multiple output circuits. Each control circuit can control the on / off state of multiple coupled functional power terminals and a control power terminal based on control signals provided by multiple coupled first control terminals, with each first control terminal corresponding to one of the multiple functional power terminals. Each output circuit can control the on / off state of multiple coupled input power terminals and the signal output terminal of a coupled pixel based on control signals provided by multiple coupled second control terminals, with each second control terminal corresponding to one of the multiple input power terminals, and the multiple input power terminals including at least the control power terminal. Furthermore, at least two output circuits share the same control power terminal coupled to the same control circuit. Thus, the control circuit and output circuits can cooperate to control the on / off state of multiple functional power terminals and pixels, achieving the purpose of driving pixels to emit light using different modes. This reduces the number of switches and control signals required in the display driver, avoids a large chip size in the display driver, and reduces the power consumption of the display driver.

[0076] Optional, combined Figure 2 As can be seen, in this embodiment of the disclosure, the multiple functional power terminals may include three types of power terminals: a pre-charge power terminal (Pre-Charge V), a drive power terminal (VDD), and a pull-down power terminal (GND). Of course, in some other embodiments, other power terminals besides these three types may also be included.

[0077] Optional, Figure 3 This is a schematic diagram of another display driver structure provided in an embodiment of this disclosure. For example... Figure 3 As shown, in this embodiment of the disclosure, at least one control circuit 01 can also be coupled to a third control terminal Sw3 and used to control the on / off state of the functional power supply terminal and the control power supply terminal ConV corresponding to the first control terminal Sw1 based on the first control signal provided by each first control terminal Sw1 and the third control signal provided by the third control terminal Sw3. That is, for the control circuit 01, an additional third control terminal Sw3 can be provided to control the on / off state of the functional power supply terminal and the control power supply terminal ConV. In this way, the reliability of controlling the on / off state of the functional power supply terminal and the control power supply terminal ConV can be improved, so that only one functional power supply terminal and the control power supply terminal ConV are conducting at the same time. For example, Figure 3 Each control circuit 01 shown is coupled to the third control terminal Sw3.

[0078] Optional, in Figure 3 Based on this, continue to refer to Figure 4 As can be seen from another display driver shown, the control circuit 01 described in this embodiment may include: a first control sub-circuit 011 and a second control sub-circuit 012.

[0079] The first control sub-circuit 011 can be coupled to multiple functional power supply terminals, multiple first control terminals Sw1 corresponding to each of the multiple functional power supply terminals, and an output node N1. The first control sub-circuit 011 can be used to control the on / off state of the functional power supply terminal corresponding to the first control terminal Sw1 and the output node N1 based on the first control signal provided by each first control terminal Sw1.

[0080] For example, with Figure 2 Similarly, such as Figure 4 As shown, the multiple functional power terminals may include a pre-charge power terminal Pre-ChargeV, a drive power terminal VDD, and a pull-down power terminal GND. Correspondingly, the multiple first control terminals Sw1 may also include first control terminals Sw1-3, Sw1-1, and Sw1-2, each corresponding to one of the pre-charge power terminal Pre-ChargeV, the drive power terminal VDD, and the pull-down power terminal GND.

[0081] Furthermore, taking the Pre-Charge V power supply terminal as an example, the first control sub-circuit 011 can control the Pre-Charge V power supply terminal to conduct with the output node N1 when the potential of the first control signal provided by the first control terminal Sw1-3 corresponding to the Pre-Charge V power supply terminal is the first potential, and the potential of the first control signal provided by the other first control terminals (including: the first control terminal Sw1-1 and the first control terminal Sw1-2) is the second potential.

[0082] The second control sub-circuit 012 can be coupled to the third control terminal Sw3, the output node N1, and the control power supply terminal ConV, respectively. The second control sub-circuit 012 can be used to control the on / off state of the output node N1 and the control power supply terminal ConV based on the third control signal provided by the third control terminal Sw3.

[0083] For example, the second control sub-circuit 012 can control the output node N1 to conduct with the control power supply terminal ConV when the potential of the third control signal provided by the third control terminal Sw3 is the first potential, so that the functional power supply terminal (e.g., the pre-charge power supply terminal Pre-Charge V) that is conducting with the output node N1 is further conducted with the control power supply terminal ConV; and the second control sub-circuit 012 can control the output node N1 to disconnect from the control power supply terminal ConV when the potential of the third control signal provided by the third control terminal Sw3 is the second potential.

[0084] Optional, Figure 5 This is a schematic diagram of another display driver provided in an embodiment of this disclosure. For example... Figure 5 As shown, the pre-charge power supply terminal Pre-Charge V described in the above embodiment may include: a first pre-charge power supply terminal Pre-Charge V1 and a second pre-charge power supply terminal Pre-Charge V2. The drive power supply terminal VDD may include: a first drive power supply terminal PVDD and a second drive power supply terminal NVDD. The control power supply terminal ConV may include: a first control power supply terminal ConV1 and a second control power supply terminal ConV2. Correspondingly, the control circuit 01 may include: two first control sub-circuits 011, and two second control sub-circuits 012 corresponding one-to-one with the two first control sub-circuits 011.

[0085] In the two first control sub-circuits 011, the multiple functional power supply terminals coupled to one first control sub-circuit 011 may include at least two of the following: a first pre-charge power supply terminal Pre-Charge V1, a first drive power supply terminal PVDD, and a pull-down power supply terminal GND. For example, Figure 5 The first control sub-circuit 011 shown is coupled to multiple functional power supply terminals, including a first pre-charge power supply terminal Pre-Charge V1, a first drive power supply terminal PVDD, and a pull-down power supply terminal GND. Furthermore, a second control sub-circuit 012 corresponding to the first control sub-circuit 011 can be coupled to the first control power supply terminal ConV1.

[0086] Another first control sub-circuit 011 coupled to multiple functional power supply terminals may include at least two of the following: a second pre-charge power supply terminal Pre-Charge V2, a second drive power supply terminal NVDD, and a pull-down power supply terminal GND. For example, Figure 5 The multiple functional power supply terminals coupled to the other first control sub-circuit 011 shown include: a second pre-charge power supply terminal Pre-Charge V2, a second drive power supply terminal NVDD, and a pull-down power supply terminal GND. Furthermore, another second control sub-circuit 012 corresponding to the other first control sub-circuit 011 can be coupled to the second control power supply terminal ConV2.

[0087] Specifically, the potential of the first pre-charge power signal provided by the first pre-charge power terminal Pre-Charge V1 can be greater than the potential of the second pre-charge power signal provided by the second pre-charge power terminal Pre-Charge V2. For example, the potential of the first pre-charge power signal provided by the first pre-charge power terminal Pre-Charge V1 is exactly opposite to the potential of the second pre-charge power signal provided by the second pre-charge power terminal Pre-Charge V2. For instance, assuming the potential of the first pre-charge power signal provided by the first pre-charge power terminal Pre-Charge V1 is 6 volts (V), the corresponding potential of the second pre-charge power signal provided by the second pre-charge power terminal Pre-Charge V2 can be -6V.

[0088] The potential of the first drive power signal provided by the first drive power terminal PVDD can be greater than the potential of the second drive power signal provided by the second drive power terminal NVDD. Similarly to the pre-charge power terminal Pre-Charge V, the potential of the first drive power signal provided by the first drive power terminal PVDD and the potential of the second drive power signal provided by the second drive power terminal NVDD can also be exactly opposite.

[0089] Furthermore, the potential of the first pre-charge power signal can be located between the potential of the first drive power signal and the potential of the pull-down power signal provided by the pull-down power terminal GND (e.g., 0). The potential of the second pre-charge power signal can be located between the potential of the second drive power signal and the potential of the pull-down power signal.

[0090] Based on the above embodiments, it can be seen that the potential of the signal ultimately transmitted by the control circuit 01 to the first control power terminal ConV1 and the potential of the signal transmitted to the second control power terminal ConV2 can also be exactly opposite. Furthermore, the potential of the signal transmitted to the first control power terminal ConV1 is greater than the potential of the signal transmitted to the second control power terminal ConV2. Alternatively, the signals ultimately transmitted by the control circuit 01 to the first control power terminal ConV1 and the signals transmitted to the second control power terminal ConV2 can both be pull-down power signals.

[0091] Furthermore, it should be noted that in this embodiment, the potential of the first power signal provided by the first power terminal VH can be greater than the potential of the second power signal provided by the second power terminal VL.

[0092] Optional, continue to refer to Figure 5 As can be seen, in this embodiment, multiple output circuits 02 can share the same control power supply terminal ConV coupled to the same control circuit 01, and each pair of adjacent output circuits 02 can be coupled one-to-one with the first control power supply terminal ConV1 and the second control power supply terminal ConV2 included in the control power supply terminal ConV. For example, taking the first output circuit 02 and the second output circuit 02 arranged from left to right as an example, the first output circuit 02 can be coupled to the second control power supply terminal ConV2; the second output circuit 02 can be coupled to the first control power supply terminal ConV1. The others follow the same pattern.

[0093] Optional, continue to refer to Figure 5 As can be seen, in this embodiment, the output circuit 02 can be divided into multiple output circuit groups 02Z. Each output circuit group 02Z may include two adjacent output circuits 02, and each output circuit group 02Z may include different output circuits 02. Each output circuit group 02Z can share the same first power supply terminal VH and the same second power supply terminal VL. In this way, the number of input power supply terminals required in the display driver can be reduced, further avoiding a large chip size.

[0094] Optional, see reference Figure 1 It can also be seen that, in this embodiment of the present disclosure, the display panel 10 includes a plurality of pixels P1 arranged in an array. And, continuing to refer to... Figure 5 It can be seen that the display driver includes multiple output circuits O2 that can be coupled one-to-one with multiple signal output terminals Out, and the multiple signal output terminals Out can be used to couple one-to-one with multiple columns of pixels P1. Figure 5 (Not shown). It should be noted that, Figure 5 Only one output circuit 02 is schematically shown, coupled to three second control terminals Sw2-1, Sw2-2 and Sw2-3.

[0095] Optionally, the display driver provided in this embodiment may further include a switch control circuit. This switch control circuit can be coupled to a plurality of first control terminals Sw1, a plurality of second control terminals Sw2, and a third control terminal Sw3, respectively. The switch control circuit can be used to provide a first control signal to the first control terminal Sw1, a second control signal to the second control terminal Sw2, and a third control signal to the third control terminal Sw3. That is, a dedicated control circuit can be provided to provide control signals to each control terminal. For example, the switch control circuit can be a timing controller (TCON).

[0096] Optional, Figure 6 This is a schematic diagram of another display driver provided in an embodiment of this disclosure. For example... Figure 6 As shown, each first control sub-circuit 011 may include a plurality of first switches K1 corresponding one-to-one with a plurality of first control terminals Sw1 and a plurality of functional power supply terminals. Each second control sub-circuit 012 may include a second switch K2. And each output circuit 02 may include a plurality of third switches K3 corresponding one-to-one with a plurality of second control terminals Sw2 and a plurality of input power supply terminals.

[0097] The control terminal of each first switch K1 can be coupled to the corresponding first control terminal Sw1, the input terminal of each first switch K1 can be coupled to the corresponding functional power supply terminal, and the output terminal of each first switch K1 can be coupled to the output node N1. For example, based on the above embodiments and in conjunction with... Figure 5 and Figure 6 It can be seen that the control terminal of the first switch K1, which is coupled to the pre-charge power supply terminal Pre-Charge V (including the first pre-charge power supply terminal Pre-Charge V1 and the second pre-charge power supply terminal Pre-Charge V2), can be coupled to the first control terminal Sw1-3. The control terminal of the first switch K1, which is coupled to the drive power supply terminal VDD (including the first drive power supply terminal PVDD and the second drive power supply terminal NVDD), can be coupled to the first control terminal Sw1-1. The control terminal of the first switch K1, which is coupled to the pull-down power supply terminal GND, can be coupled to the first control terminal Sw1-2.

[0098] The control terminal of the second switch K2 can be coupled to the third control terminal Sw3, the input terminal of the second switch K2 can be coupled to the output node N1, and the output terminal of the second switch K2 can be coupled to the control power supply terminal ConV. As described in the above embodiments and in conjunction with... Figure 5 and Figure 6 It can be seen that in the two second control sub-circuits 012, the output terminals of the two second switches K2 can be coupled to the first control power supply terminal ConV1 and the second control power supply terminal ConV2, respectively.

[0099] The control terminal of each third switch K3 can be coupled to the corresponding second control terminal Sw2, the input terminal of each third switch K3 can be coupled to the corresponding input power supply terminal, and the output terminal of each third switch K3 can be coupled to at least one corresponding signal output terminal Out. As described in the above embodiments and in conjunction with... Figure 5 and Figure 6 It can be seen that the control terminal of the third switch K3, which is coupled to the control power supply terminal ConV (including the first control power supply terminal ConV1 and the second control power supply terminal ConV2), can be coupled to the second control terminal Sw2-1. The control terminal of the third switch K3, which is coupled to the first power supply terminal VH, and the control terminal of the third switch K3, which is coupled to the second power supply terminal VL, can be coupled to the second control terminals Sw2-2 and Sw2-3, respectively.

[0100] Optionally, in this embodiment of the disclosure, the switches included in the control circuit 01 and the output circuit 02 can both be P-type transistors or N-type transistors. That is, Figure 6 The first switch K1, the second switch K2, and the third switch K3 shown can all include either a P-type transistor or an N-type transistor. For an N-type transistor, the first potential it receives (i.e., the effective potential) can be higher than the second potential (i.e., the ineffective potential); for a P-type transistor, the first potential it receives can be lower than the second potential.

[0101] Taking a first switch K1 as an example, as described in the above embodiments, the gate of its included transistor can be coupled to a first control terminal Sw1, the first electrode of its included transistor can be coupled to the functional power supply terminal (e.g., Pre-Charge V) corresponding to the first control terminal Sw1, and the second electrode of its included transistor can be coupled to the output node N1. The gate of the second switch K2 can be coupled to a third control terminal Sw3, the first electrode of the second switch K2 can be coupled to the output node N1, and the second electrode of the second switch K2 can be coupled to the control power supply terminal ConV. Taking a third switch K3 as an example, the gate of its included transistor can be coupled to a second control terminal Sw2, the first electrode of its included transistor can be coupled to the input power supply terminal (e.g., Control Power Supply ConV) corresponding to the second control terminal Sw2, and the second electrode of its included transistor can be coupled to the signal output terminal Out. Optionally, one of the first and second electrodes of the transistor can be the source, and the other can be the drain.

[0102] Optional, continue to refer to Figure 6 It can also be seen that the display driver described in the embodiments of this disclosure may further include an amplifier (Amp).

[0103] The amplifier Amp can be coupled to a first power supply terminal VH, a second power supply terminal VL, and multiple output circuits 02. The amplifier Amp can amplify the first power signal provided by the first power supply terminal VH and transmit it to the output circuit 02, and amplify the second power signal provided by the second power supply terminal VL and transmit it to the output circuit 02. That is, the output circuit 02 can be indirectly coupled to the first power supply terminal VH and the second power supply terminal VL through the amplifier Amp. This allows for reliable transmission of power signals from the first power supply terminal VH and the second power supply terminal VL to the output circuit 02. Taking the first power supply terminal VH as an example... Figure 6 The coupling between the first power supply terminal VH and the amplifier Amp is illustrated using VH Amp as an example, and the coupling between the second power supply terminal VL and the amplifier Amp is illustrated using VL Amp as an example.

[0104] In conjunction with the above embodiments, Figure 6 The following is an explanation of the working principle and timing of a display driver, using the example of a display driver with a high first potential and a low second potential:

[0105] First, referring to Table 1 below, it shows the potential of the first control signals provided by the three first control terminals Sw1-1, Sw1-2, and Sw1-3 under four modes: Pre-Charging Mode, Charge-Sharing Mode, Over-Driving Mode, and Under-Driving Mode. It also shows the potential of the third control signal provided by the third control terminal Sw3. Here, "ON" can represent the first potential, i.e., the valid potential, indicating that the corresponding switch is closed; "OFF" can represent the second potential, i.e., the invalid potential, indicating that the corresponding switch is off (i.e., not closed).

[0106] Table 1

[0107] Mode Sw1-1 Sw1-2 Sw1-3 Sw3 Pre-Charging Mode OFF OFF ON ON Charge Sharing Mode OFF OFF OFF OFF Over-driving mode ON OFF OFF ON Under-driving mode OFF ON OFF ON

[0108] Refer to Table 1 and combine with Figure 6 It can be seen that when the potential of the first control signal provided by each first control terminal Sw1-1 and each first control terminal Sw1-2 is the second potential, i.e. "OFF", and the potential of the first control signal provided by each first control terminal Sw1-3 and the potential of the third control signal provided by each third control terminal Sw3 are the first potential, i.e. "ON", the first switch K1 corresponding to the first control terminal Sw1-3 and the pre-charge power terminal Pre-Charge V (including the first pre-charge power terminal Pre-Charge V1 and the second pre-charge power terminal Pre-Charge V2) can be closed, the other first switches K1 can be turned off, and the second switch K2 coupled to each third control terminal Sw3 can be closed. Correspondingly, the first pre-charge power signal provided by the first pre-charge power terminal Pre-Charge V1 can be transmitted to the first control power terminal ConV1 through one of the closed first switches K1 and one of the closed second switches K2. The second pre-charge power signal provided by the second pre-charge power terminal Pre-Charge V2 can be transmitted to the second control power terminal ConV2 through another closed first switch K1 and another closed second switch K2. The display driver enters the pre-charge mode, that is, enters the Pre-Charging Mode.

[0109] Optional, Figure 7 The schematic diagram illustrates the signal timing when the display driver enters precharge mode. From Figure 7 It can be further seen that, upon entering the pre-charge mode, a first pre-charge power signal and a second pre-charge power signal can be transmitted to the signal output terminal Out of the coupled pixel P1. Furthermore, it can be seen that the potential of the first pre-charge power signal provided by the first pre-charge power terminal Pre-Charge V1 and the potential of the second pre-charge power signal provided by the second pre-charge power terminal Pre-Charge V2 can be opposite.

[0110] When the potential of the first control signal provided by each first control terminal Sw1-1, each first control terminal Sw1-2, and each first control terminal Sw1-3 is the second potential, i.e., "OFF", and the potential of the third control signal provided by each third control terminal Sw3 is also the second potential, i.e., "OFF", the first switch K1 coupled to each first control terminal Sw1 can be turned off, and the second switch K2 coupled to each third control terminal Sw3 can be turned off. Accordingly, the first pre-charge power terminal Pre-Charge V1, the first drive power terminal PVDD, and the pull-down power terminal GND are all disconnected from the first control power terminal ConV1; and the second pre-charge power terminal Pre-Charge V2, the second drive power terminal NVDD, and the pull-down power terminal GND are all disconnected from the second control power terminal ConV2, and the display driver enters the charging sharing mode, i.e., Charge Sharing Mode.

[0111] Optional, Figure 8 The schematic diagram illustrates the signal timing diagram when the display driver enters the charge-sharing mode. Figure 8 It can be further observed that when entering the charging sharing mode, the Pre-Charge V terminal, the drive power VDD terminal, and the pull-down power GND terminal do not transmit signals to the signal output terminal Out of the coupled pixel P1. Combined with... Figure 6 Based on this, the input terminals of each third switch K3 of the coupled control power supply terminal ConV can be in a floating state, so that multiple pixels P1 can share charge.

[0112] When the potential of the first control signal provided by each first control terminal Sw1-2 and each first control terminal Sw1-3 is the second potential, i.e., "OFF", and the potential of the first control signal provided by each first control terminal Sw1-1 and the potential of the third control signal provided by each third control terminal Sw3 are both the first potential, i.e., "ON", the first switch K1 corresponding to the first control terminal Sw1-1 and the drive power terminal VDD (including the first drive power terminal PVDD and the second drive power terminal NVDD) can all be closed, the remaining first switches K1 can all be turned off, and the second switch K2 coupled to each third control terminal Sw3 can all be closed. Accordingly, the first drive power signal provided by the first drive power terminal PVDD can be transmitted to the first control power terminal ConV1 through one of the closed first switches K1 and one of the closed second switches K2, and the second drive power signal provided by the second drive power terminal NVDD can be transmitted to the second control power terminal ConV2 through the other closed first switch K1 and the other second switch K2. The display driver enters the over-driving mode.

[0113] Optional, Figure 9 The schematic diagram illustrates the signal timing when the display driver enters overdrive mode. From Figure 9 It can be further seen that when entering overdrive mode, a first drive power signal and a second drive power signal can be transmitted to the signal output terminal Out of the coupled pixel P1. Furthermore, it can be seen that the potential of the first drive power signal provided by the first drive power terminal PVDD and the potential of the second drive power signal provided by the second drive power terminal NVDD can be opposite.

[0114] When the potential of the first control signal provided by each first control terminal Sw1-1 and each first control terminal Sw1-3 is the second potential, i.e., "OFF", and the potential of the first control signal provided by each first control terminal Sw1-2 and the potential of the third control signal provided by each third control terminal Sw3 is the first potential, i.e., "ON", the first switch K1 coupled to each first control terminal Sw1-2 and the pull-down power supply terminal GND can be closed, the remaining first switches K1 can be turned off, and the second switch K2 coupled to each third control terminal Sw3 can be closed. Accordingly, the pull-down power signal provided by the pull-down power supply terminal GND can be transmitted to the first control power supply terminal ConV1 through one of the closed first switches K1 and one of the closed second switches K2, and to the second control power supply terminal ConV2 through the other closed first switch K1 and another second switch K2. The display driver enters the under-driving mode.

[0115] Optional, Figure 10 This schematically illustrates the signal timing diagram when the display driver enters underdrive mode. From Figure 10 It can be further seen that when entering the underdriven mode, the pull-down power signal provided by the pull-down power supply terminal GND can be transmitted to the signal output terminal Out of the coupled pixel P1.

[0116] It should be noted that, Figures 7 to 10 The timing of the signals output from the Out terminal corresponding to the Even Channel and the Odd Channel is also schematically shown.

[0117] Among them, combined Figure 1 and Figure 6 An odd channel can refer to the channel where the output circuit 02 of pixels P1 in an odd number of columns (e.g., column 1, column 3, ...) is located, that is, the signal output terminal Out of the odd number of pixels. <n>and Out<N+2> Even-numbered channels can refer to the channels where output circuit 02, which is coupled to even-numbered columns of pixels (e.g., the 2nd, 4th, ...), is located. Specifically, it refers to the signal output terminal Out, which is coupled to even-numbered column pixels P1.<N+1> and Out<N+3> .

[0118] It should also be noted that, Figures 7 to 10 The timing of the second control signals provided by the three second control terminals Sw2-1, Sw2-2, and Sw2-3 is also schematically shown. Combined with... Figure 7 and Figure 8 It can be seen that in the pre-charge mode and the charging sharing mode, a second control signal with a first potential can be sequentially provided to the three second control terminals Sw2-1, Sw2-2, and Sw2-3. Consequently, the three third switches K3 included in each output circuit 02 can be sequentially turned on, thereby controlling the first power terminal VH, the second power terminal VL, and the control power terminal ConV to sequentially connect with the signal output terminal Out. Furthermore, in the overdrive mode and the underdrive mode, a second control signal with a second potential can be provided to the second control terminal (e.g., the second control terminal Sw2-3) corresponding to one of the first power terminals VH and VL, and a second control signal with a first potential can be sequentially provided to the remaining second control terminals (e.g., the second control terminals Sw2-1 and Sw2-2). Consequently, among the three third switches K3 included in each output circuit 02, the two third switches K3 that receive the second control signal with the first potential can be sequentially turned on, thereby controlling the control power terminal ConV, and the other power terminal among the first power terminal VH and the second power terminal VL to sequentially connect with the signal output terminal Out.

[0119] In summary, this disclosure provides a display driver. The display driver includes at least one control circuit and multiple output circuits. Each control circuit can control the on / off state of multiple coupled functional power terminals and a control power terminal based on control signals provided by multiple coupled first control terminals, with each first control terminal corresponding to one of the multiple functional power terminals. Each output circuit can control the on / off state of multiple coupled input power terminals and the signal output terminal of a coupled pixel based on control signals provided by multiple coupled second control terminals, with each second control terminal corresponding to one of the multiple input power terminals, and the multiple input power terminals including at least the control power terminal. Furthermore, at least two output circuits share the same control power terminal coupled to the same control circuit. Thus, the control circuit and output circuits can cooperate to control the on / off state of multiple functional power terminals and pixels, achieving the purpose of driving pixels to emit light using different modes. This reduces the number of switches and control signals required in the display driver, avoids a large chip size in the display driver, and reduces the power consumption of the display driver.

[0120] Figure 11 This is a flowchart of a display driver driving method provided in an embodiment of this disclosure. This method can be applied to, for example... Figures 2 to 6 In any of the display drivers shown. For example... Figure 11 As shown, the method includes:

[0121] Step 1101: In response to the pre-charge mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pre-charge power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each control circuit controls the pre-charge power supply terminal and the control power supply terminal to be turned on based on the first control signal.

[0122] Step 1102: In response to the overdrive mode, a first control signal with a first potential is provided to the first control terminal corresponding to the drive power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each control circuit controls the drive power supply terminal and the control power supply terminal to be turned on based on the first control signal.

[0123] Step 1103: In response to the underdriven mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pull-down power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each control circuit controls the pull-down power supply terminal and the control power supply terminal to be turned on based on the first control signal.

[0124] Step 1104: In response to the charging sharing mode, a first control signal with a second potential is provided to each first control terminal. Based on the first control signal, each control circuit controls each functional power terminal to disconnect from the control power terminal.

[0125] Furthermore, in the pre-charge mode and the charge-sharing mode, a second control signal with a first potential is sequentially provided to multiple second control terminals. Each output circuit, based on the second control signal, controls the first power supply terminal, the second power supply terminal, and the control power supply terminal to sequentially conduct with at least one signal output terminal. Also, in the overdrive mode and the underdrive mode, a second control signal with a second potential is provided to the second control terminal corresponding to one of the first and second power supplies, and a second control signal with a first potential is sequentially provided to the remaining second control terminals. Each output circuit, based on the second control signal, controls the control power supply terminal, and the other power supply terminal of the first and second power supplies, to sequentially conduct with at least one signal output terminal.

[0126] In summary, this disclosure provides a display driving method. In this method, each control circuit included in the display driver can control the on / off state of multiple coupled functional power terminals and a control power terminal based on control signals provided by multiple coupled first control terminals, with each of the multiple first control terminals corresponding one-to-one with the multiple functional power terminals. Each output circuit included in the display driver can control the on / off state of multiple coupled input power terminals and the signal output terminal of a coupled pixel based on control signals provided by multiple coupled second control terminals, with each of the multiple second control terminals corresponding one-to-one with the multiple input power terminals, and the multiple input power terminals at least including a control power terminal. Furthermore, at least two output circuits share the same control power terminal coupled to the same control circuit. Thus, the control circuit and output circuit can cooperate to control the on / off state of multiple functional power terminals and pixels, achieving the purpose of driving pixels to emit light using different modes. Furthermore, this reduces the number of switches and control signals required in the display driver, avoids a large chip size in the display driver, and reduces the operating power consumption of the display driver.

[0127] It should be noted that the specific implementation of the above steps can be found in the device-side embodiments, and will not be repeated in the method-side embodiments.

[0128] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Figure 12 As shown, the display device may include: a display panel 10, and as shown in the figure. Figures 2 to 6 Any of the shown display drivers 00. Wherein, combined with Figure 1 As can be seen, the display panel 10 may include a plurality of pixels P1. The display driver 00 may be coupled to the plurality of pixels P1 and used to drive the plurality of pixels P1 to emit light.

[0129] It should be noted that a display device generally includes a source driver and a gate driver. Multiple pixels P1 can be arranged in an array. The gate driver can be coupled to multiple rows of pixels P1 and transmit gate driving signals to the multiple rows of pixels. The source driver can be coupled to multiple columns of pixels P1 and transmit data signals to the multiple columns of pixels. Pixels P1 can emit light based on the received gate driving signals and data signals. The display driver described in the above embodiments can be integrated into the source driver; that is, the display driver described in the above embodiments can be a part of the source driver.

[0130] Optionally, the display device described in the embodiments of this disclosure can be any product or component with display function, such as an organic light-emitting diode (OLED) display device, electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, or navigator.

[0131] It should be understood that the terminology used in the embodiments of this disclosure is for the purpose of explaining the embodiments of this disclosure only and is not intended to limit this disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should be understood in their ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains.

[0132] For example, the words "first," "second," or "third," and similar terms used in this patent application specification and claims, do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0133] Similarly, words like "one" or "one" do not indicate a quantity limit, but rather that there is at least one.

[0134] The word "includes" or similar terms means that the elements or objects preceding "includes" or "include" cover the elements or objects listed after "includes" or "includes" and their equivalents, but do not exclude other elements or objects.

[0135] "Up," "down," "left," or "right" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. "Connection" or "coupled" refers to an electrical connection.

[0136] The "and / or" signifies that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0137] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.< / n> < / n>

Claims

1. A display driver, characterized in that, The display driver is used in a display panel, the display panel including a plurality of pixels; the display driver includes: At least one control circuit, each of the control circuits being coupled to a plurality of functional power terminals, a plurality of first control terminals corresponding one-to-one with the plurality of functional power terminals, and a control power terminal; each of the control circuits is used to control the on / off state of the functional power terminal corresponding to the first control terminal and the control power terminal based on a first control signal provided by each first control terminal. Multiple output circuits are provided, each of which is coupled to multiple input power terminals, multiple second control terminals corresponding to each of the multiple input power terminals, and at least one signal output terminal. The multiple signal output terminals coupled to the multiple output circuits are used to couple to the multiple pixels. Each output circuit is used to control the on / off state of the input power terminal corresponding to the second control terminal and the at least one signal output terminal based on a second control signal provided by each second control terminal. The plurality of functional power terminals include at least two of the following: a pre-charge power terminal, a drive power terminal, and a pull-down power terminal; the plurality of input power terminals include a first power terminal, a second power terminal, and the control power terminal; and at least two output circuits share the same control power terminal coupled to the same control circuit, and at least two output circuits share the same first power terminal and / or share the same second power terminal. Furthermore, at the same time, each of the control circuits is used to control one of the multiple functional power terminals to be connected to the control power terminal, or to control each of the multiple functional power terminals to be disconnected from the control power terminal; each of the output circuits is used to control one of the multiple input power terminals to be connected to the signal output terminal. Furthermore, when the control power terminal and the signal output terminal are connected, if the pre-charge power terminal is connected to the control power terminal, the display driver can operate in pre-charge mode; if the drive power terminal is connected to the control power terminal, the display driver can operate in overdrive mode; if the pull-down power terminal is connected to the control power terminal, the display driver can operate in underdrive mode; and if each functional power terminal is disconnected from the control power terminal, the display driver can operate in charge-sharing mode.

2. The display driver according to claim 1, characterized in that, The multiple functional power terminals include: a pre-charge power terminal, a drive power terminal, and a pull-down power terminal.

3. The display driver according to claim 1, characterized in that, At least one of the control circuits is also coupled to a third control terminal and is used to control the on / off state of the functional power supply terminal corresponding to the first control terminal and the control power supply terminal based on a first control signal provided by each of the first control terminals and a third control signal provided by the third control terminal.

4. The display driver according to claim 3, characterized in that, The control circuit includes: a first control sub-circuit and a second control sub-circuit; The first control sub-circuit is coupled to the plurality of functional power terminals, the plurality of first control terminals corresponding to the plurality of functional power terminals, and the output node respectively; the first control sub-circuit is used to control the on / off state of the functional power terminal corresponding to the first control terminal and the output node based on the first control signal provided by each first control terminal. The second control sub-circuit is coupled to the third control terminal, the output node, and the control power supply terminal respectively; the second control sub-circuit is used to control the on / off state of the output node and the control power supply terminal based on the third control signal provided by the third control terminal.

5. The display driver according to claim 4, characterized in that, The first control sub-circuit includes: a plurality of first switches corresponding one-to-one with the plurality of first control terminals and the plurality of functional power supply terminals; The control terminal of each first switch is coupled to the corresponding first control terminal, the input terminal of each first switch is coupled to the corresponding functional power supply terminal, and the output terminal of each first switch is coupled to the output node.

6. The display driver according to claim 4, characterized in that, The second control sub-circuit includes: a second switch; The control terminal of the second switch is coupled to the third control terminal, the input terminal of the second switch is coupled to the output node, and the output terminal of the second switch is coupled to the control power supply terminal.

7. The display driver according to claim 4, characterized in that, The pre-charge power supply terminal includes: a first pre-charge power supply terminal and a second pre-charge power supply terminal; the drive power supply terminal includes: a first drive power supply terminal and a second drive power supply terminal; the control power supply terminal includes: a first control power supply terminal and a second control power supply terminal; the control circuit includes: two first control sub-circuits, and two second control sub-circuits corresponding one-to-one with the two first control sub-circuits. A first control subcircuit is coupled to multiple functional power terminals, including at least two of the following: a first pre-charge power terminal, a first drive power terminal, and a pull-down power terminal; and a second control subcircuit corresponding to the first control subcircuit is coupled to the first control power terminal. The other first control sub-circuit is coupled to multiple functional power terminals, including at least two of the second pre-charge power terminal, the second drive power terminal, and the pull-down power terminal; and, the other second control sub-circuit corresponding to the other first control sub-circuit is coupled to the second control power terminal. Wherein, the potential of the first pre-charge power signal provided by the first pre-charge power terminal is greater than the potential of the second pre-charge power signal provided by the second pre-charge power terminal; the potential of the first drive power signal provided by the first drive power terminal is greater than the potential of the second drive power signal provided by the second drive power terminal; and the potential of the first pre-charge power signal is located between the potential of the first drive power signal and the potential of the pull-down power signal provided by the pull-down power terminal, and the potential of the second pre-charge power signal is located between the potential of the second drive power signal and the potential of the pull-down power signal.

8. The display driver according to claim 7, characterized in that, The multiple output circuits share the same control power supply terminal coupled to the same control circuit, and each pair of adjacent output circuits is coupled one-to-one with the first control power supply terminal and the second control power supply terminal included in the control power supply terminal.

9. The display driver according to any one of claims 3 to 8, characterized in that, The display driver further includes: a switch control circuit; The switch control circuit is coupled to the plurality of first control terminals, the plurality of second control terminals, and the third control terminal respectively; the switch control circuit is used to provide a first control signal to the first control terminal, a second control signal to the second control terminal, and a third control signal to the third control terminal.

10. The display driver according to any one of claims 1 to 8, characterized in that, Each of the output circuits includes: a plurality of third switches corresponding one-to-one with the plurality of second control terminals and the plurality of input power terminals; The control terminal of each of the third switches is coupled to the corresponding second control terminal, the input terminal of each of the third switches is coupled to the corresponding input power supply terminal, and the output terminal of each of the third switches is coupled to the corresponding at least one signal output terminal.

11. The display driver according to any one of claims 1 to 8, characterized in that, The plurality of output circuits are divided into a plurality of output circuit groups, each output circuit group including two adjacent output circuits, and each output circuit group including different output circuits; Each output circuit group shares the same first power supply terminal and the same second power supply terminal.

12. The display driver according to any one of claims 1 to 8, characterized in that, The multiple pixel arrays are arranged; The plurality of output circuits are coupled one-to-one with the plurality of signal output terminals, and the plurality of signal output terminals are used to be coupled one-to-one with the plurality of columns of pixels.

13. The display driver according to any one of claims 1 to 8, characterized in that, The display driver also includes: An amplifier is coupled to the first power supply terminal, the second power supply terminal, and the output circuit, respectively, and is used to amplify the first power signal provided by the first power supply terminal and transmit it to the output circuit, and to amplify the second power signal provided by the second power supply terminal and transmit it to the output circuit.

14. A driving method for a display driver, characterized in that, Applied in a display driver as described in any one of claims 1 to 13; the method includes: In response to the pre-charge mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pre-charge power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each control circuit controls the pre-charge power supply terminal to be connected to the control power supply terminal based on the first control signal. In response to the overdrive mode, a first control signal with a first potential is provided to the first control terminal corresponding to the drive power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each of the control circuits controls the drive power supply terminal to be connected to the control power supply terminal based on the first control signal. In response to the underdriven mode, a first control signal with a first potential is provided to the first control terminal corresponding to the pull-down power supply terminal, and a first control signal with a second potential is provided to the other first control terminals. Each of the control circuits controls the pull-down power supply terminal to be connected to the control power supply terminal based on the first control signal. In response to the charging sharing mode, a first control signal with a second potential is provided to each first control terminal, and each control circuit controls each functional power terminal to disconnect from the control power terminal based on the first control signal; Furthermore, in the pre-charging mode and the charging sharing mode, a second control signal with a first potential is sequentially provided to multiple second control terminals, and each output circuit controls the first power terminal, the second power terminal, and the control power terminal to be sequentially connected to at least one signal output terminal based on the second control signal; In addition, in the overdrive mode and the underdrive mode, a second control signal with a second potential is provided to a second control terminal corresponding to one of the first power supply terminal and the second power supply terminal, and a second control signal with a first potential is provided to the remaining second control terminals in sequence. Each output circuit controls the control power supply terminal based on the second control signal, and the other power supply terminal of the first power supply terminal and the second power supply terminal is sequentially turned on with the at least one signal output terminal.

15. A display device, characterized in that, The display device includes: a display panel, and a display driver as described in any one of claims 1 to 13; The display panel includes a plurality of pixels; the display driver is coupled to the plurality of pixels and is used to drive the plurality of pixels to emit light.

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