Blanking circuit, chip, display panel, electronic device

Abstract

The present disclosure relates to the technical field of display, and particularly relates to a blanking circuit, a chip, a display panel and an electronic device. The blanking circuit comprises a switching module and a first voltage adjusting module. The first end of the switching module is connected to the first electrode of a light-emitting diode. The first voltage adjusting module receives a first voltage signal and performs voltage boosting to obtain a second voltage signal. The second end of the switching module receives a fourth voltage signal. When the control signal is in a first state, the second voltage signal makes the first end and the second end of the switching module conductive. When the control signal is in a second state, the third voltage signal makes the first end and the second end of the switching module disconnected. The blanking circuit of the present disclosure can obtain a blanking voltage with a larger voltage value range, and improve the voltage output capability of the blanking circuit.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a blanking circuit, a chip, a display panel, and an electronic device. Background Technology

[0002] Light-emitting diode (LED) display panels typically include a row driver chip and an LED array. The row driver chip controls the LED array to turn on row by row during display and turn off when no display is needed. The row driver chip may include one or more blanking circuits, and the LED array may include multiple rows of LEDs. Each row of LEDs may correspond to a separate blanking circuit, or multiple rows of LEDs may correspond to a single blanking circuit. When the LEDs in a row switch from the on state to the off state, the blanking circuit corresponding to that row of LEDs provides a current discharge path for the parasitic capacitance on that row of LEDs, while maintaining the voltage on the LEDs of that row at a stable voltage value (also known as the blanking voltage), thereby reducing voltage coupling between that row and other normally displayed rows.

[0003] When multiple rows of LEDs correspond to a single blanking circuit, the blanking circuit typically contains multiple switches, each corresponding to a row of LEDs. When a switch is turned on, it outputs a blanking voltage to the corresponding row of LEDs. In existing technologies, the switches typically lose some voltage when turned on, resulting in a limited range of blanking voltage values ​​that a row of LEDs can receive, making it difficult to meet user requirements. Furthermore, the speed at which the blanking voltage builds up is related to the on-resistance of the switches in the blanking circuit; the lower the on-resistance, the faster the build-up speed. Therefore, how to reduce the on-resistance of the switches to improve the blanking voltage build-up speed while simultaneously expanding the range of blanking voltage values ​​has become a research hotspot in this field. Summary of the Invention

[0004] In view of this, the present disclosure proposes a blanking circuit, a chip, a display panel, and an electronic device. The blanking circuit of the present disclosure can reduce the on-resistance of the switching module of the blanking circuit to improve the establishment speed of the blanking voltage, and at the same time obtain a blanking voltage with a large voltage range, thereby improving the voltage output capability of the blanking circuit.

[0005] According to one aspect of this disclosure, a blanking circuit is provided, including a switching module and a first voltage adjustment module. The first terminal of the switching module is connected to the first electrode of a light-emitting diode (LED). The first voltage adjustment module receives a first voltage signal, boosts it to obtain a second voltage signal, and outputs the second voltage signal to the switching module. The voltage difference between the second voltage signal and the first voltage signal is greater than a first threshold. The switching module receives the second voltage signal, a third voltage signal, a fourth voltage signal, and a control signal. The fourth voltage signal is received by the second terminal of the switching module. The level of the second voltage signal is higher than the level of the third voltage signal. When the control signal is in a first state, the second voltage signal turns on the first and second terminals of the switching module. When the control signal is in a second state, the third voltage signal turns off the first and second terminals of the switching module. The first electrode of the LED is also connected to a driving module, which also receives the control signal. When the control signal is in the first state, the driving module disconnects the first electrode of the LED from the power supply voltage or ground. When the control signal is in the second state, the driving module turns on the first electrode of the LED from the power supply voltage or ground.

[0006] In one possible implementation, the switching module includes a first switch, a second switch, and a third switch. A first terminal of the first switch receives the second voltage signal, and a second terminal of the first switch is connected to a third terminal of the third switch, the third terminal of the first switch receiving the control signal. A first terminal of the second switch receives the third voltage signal, and a second terminal of the second switch is connected to a third terminal of the third switch, the third terminal of the second switch receiving the control signal. The first terminal of the third switch serves as the second terminal of the switching module, receiving the fourth voltage signal, and the second terminal of the third switch serves as the first terminal of the switching module, connected to the first electrode of the diode.

[0007] In one possible implementation, the third switch is an N-type field-effect transistor, and the first threshold is greater than or equal to the threshold voltage of the third switch.

[0008] In one possible implementation, the driving module includes a driving transistor. When the first terminal of the driving transistor is connected to the power supply voltage, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode (LED), the third terminal of the driving transistor receives the control signal, and the second terminal of the LED is connected to ground through a current source. Alternatively, when the first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the LED, the third terminal of the driving transistor receives the control signal, and the second terminal of the LED is connected to the power supply voltage through a current source.

[0009] In one possible implementation, the driving module includes a driving transistor, a fourth switch, a fifth switch, and a second voltage adjustment module. The first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch and the first terminal of the fifth switch. The second terminal of the fourth switch is connected to ground, and the second terminal of the fifth switch is connected to the power supply voltage through the second voltage adjustment module. The third terminals of the fourth and fifth switches receive the control signal. The second voltage adjustment module receives the fifth voltage signal, boosts it to obtain a sixth voltage signal, and outputs the sixth voltage signal to the fifth switch. When the control signal is in a first state, the first and second terminals of the fourth switch are turned on, and the first and second terminals of the fifth switch are turned off. When the control signal is in a second state, the first and second terminals of the fourth switch are turned off, and the first and second terminals of the fifth switch are turned on.

[0010] In one possible implementation, the driving module includes a driving transistor, a fourth switch, and a fifth switch. The first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch and the first terminal of the fifth switch. The second terminal of the fourth switch is connected to ground, and the second terminal of the fifth switch is connected to the second terminal of the first voltage adjustment module. The third terminals of the fourth switch and the fifth switch receive the control signal. When the control signal is in a first state, the first and second terminals of the fourth switch are turned on, and the first and second terminals of the fifth switch are turned off. When the control signal is in a second state, the first and second terminals of the fourth switch are turned off, and the first and second terminals of the fifth switch are turned on.

[0011] According to another aspect of this disclosure, a chip is provided, including the blanking circuit and driving module described in any of the above claims.

[0012] According to another aspect of this disclosure, a display panel is provided, including the chip described above.

[0013] In one possible implementation, the display panel includes at least one of a liquid crystal display panel, a micro light-emitting diode display panel, a light-emitting diode display panel, a mini light-emitting diode display panel, a quantum dot light-emitting diode display panel, an organic light-emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electrowetting display panel, and a small-pitch display panel.

[0014] According to another aspect of this disclosure, an electronic device is provided, including the display panel described above.

[0015] According to the blanking circuit of this disclosure embodiment, a first voltage signal is received by a first voltage adjustment module and boosted to obtain a second voltage signal. The second voltage signal is then output to a switching module. The voltage difference between the second voltage signal and the first voltage signal is greater than a first threshold, which can provide the switching module with the voltage signal required to control the first and second terminals to conduct, thereby reducing the on-resistance of the switching module and accelerating the establishment of the blanking voltage. It also allows the blanking voltage to have a wider voltage range when the switching module is on. The switching module is used to receive the second voltage signal, the third voltage signal, the fourth voltage signal, and a control signal. The fourth voltage signal is received by the second terminal of the switching module. The level of the second voltage signal is higher than the level of the third voltage signal. When the control signal is in the first state, the second voltage signal turns on the first and second terminals of the switching module, outputting the fourth voltage signal to the light-emitting diode to complete the transmission of the blanking voltage. When the control signal is in the second state, the third voltage signal turns off the first and second terminals of the switching module, preventing the output of the fourth voltage signal to the light-emitting diode, so that the blanking circuit does not affect the normal display of the light-emitting diode. The first terminal of the LED is also connected to the driving module, which receives a control signal. When the control signal is in a first state, the driving module disconnects the first terminal of the LED from the power supply voltage or ground, allowing the blanking voltage to remain constant. When the control signal is in a second state, the driving module connects the first terminal of the LED to the power supply voltage or ground, allowing the LED to display normally and stop displaying. In summary, the blanking circuit of this embodiment can reduce the on-resistance of the switching module of the blanking circuit to improve the establishment speed of the blanking voltage, while also obtaining a blanking voltage with a wide voltage range, thus improving the voltage output capability of the blanking circuit.

[0016] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0018] Figure 1 A schematic diagram showing the structure of an LED display panel.

[0019] Figure 2 This illustrates another application scenario of the blanking circuit according to an embodiment of the present disclosure.

[0020] Figure 3a A schematic diagram showing the structure of a blanking circuit according to an embodiment of the present disclosure is provided.

[0021] Figure 3bA schematic diagram showing the structure of a blanking circuit according to an embodiment of the present disclosure is provided.

[0022] Figure 4 A schematic diagram showing the structure of a switching module according to an embodiment of the present disclosure is provided.

[0023] Figure 5a A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0024] Figure 5b A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0025] Figure 6 A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0026] Figure 7 A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0027] Figure 8 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] In the description of this disclosure, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise expressly specified.

[0031] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0032] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0033] The following section will introduce the principle of LED display panel scanning display and the blanking circuit of existing technology.

[0034] Figure 1 A schematic diagram showing the structure of an LED display panel.

[0035] like Figure 1 As shown, a light-emitting diode (LED) display panel typically includes row driver chips, column driver chips, and an LED array. The column driver chips provide drive current to each column of LEDs, while the row driver chips control the LED array to turn on row by row during display and turn it off when not in use. A row driver chip may include multiple driver modules, and the LED array may include multiple rows of LEDs, with each row of LEDs corresponding to one driver module. The driver modules control the turning on and off of the corresponding row of LEDs; in the on state, drive current flows through the LEDs.

[0036] To reduce voltage coupling between a row of LEDs when it is off and other normally functioning rows of LEDs, existing technologies have proposed adding one or more blanking circuits to the row driver chip. Each row of LEDs can correspond to a separate blanking circuit, and multiple rows of LEDs can also correspond to a single blanking circuit. Figure 1 (Taking a multiple row of LEDs corresponding to one blanking circuit as an example). When the LEDs in a certain row switch from the on state to the off state, the blanking circuit corresponding to that row of LEDs can provide a current discharge path for the parasitic capacitance on the LEDs in that row, and at the same time maintain the voltage on the LEDs in that row at a stable voltage value (also known as the blanking voltage) to reduce the voltage coupling between that row and other normal display rows.

[0037] When multiple rows of LEDs correspond to a single blanking circuit, the blanking circuit typically contains multiple switches, each corresponding to a row of LEDs. When a switch is turned on, it outputs a blanking voltage to the corresponding row of LEDs. The switches can be either P-type or N-type field-effect transistors (FETs). Due to hardware limitations, the switches typically lose some voltage when turned on. For P-type FETs, the source / drain voltage must be greater than the sum of the gate voltage (usually 0) and the threshold voltage Vth when the P-type FET is turned on; otherwise, the P-type FET cannot conduct properly. For N-type FET switches, the source / drain voltage must be less than the difference between the gate voltage (usually the power supply voltage Vdd) and the threshold voltage when the N-type FET is turned on; otherwise, the N-type FET cannot conduct. Therefore, when a P-type FET is used as a switch in a blanking circuit, the blanking voltage is between Vth and Vdd. When an N-type FET is used as a switch in a blanking circuit, the blanking voltage is between 0 and Vdd - Vth. In other words, if the blanking circuit uses only a single MOSFET for switching, the blanking voltage cannot be freely adjusted between 0 and Vdd. This results in a small range of blanking voltage values ​​that a row of LEDs can receive, making it difficult to meet user needs. Some existing technologies have proposed using parallel P-type / N-type MOSFETs as switches for a row of LEDs, but this increases the circuit area. Furthermore, the speed at which the blanking voltage builds up is related to the on-resistance of the switch in the blanking circuit; the smaller the on-resistance, the faster the build-up speed. Therefore, how to reduce the on-resistance of the switch to improve the speed of blanking voltage build-up while simultaneously expanding the range of blanking voltage values ​​has become a research hotspot in this field.

[0038] In view of this, the present disclosure proposes a blanking circuit, a chip, a display panel, and an electronic device. The blanking circuit of the present disclosure can reduce the on-resistance of the switching module of the blanking circuit to improve the establishment speed of the blanking voltage, and at the same time obtain a blanking voltage with a large voltage range, thereby improving the voltage output capability of the blanking circuit.

[0039] Furthermore, the blanking circuit disclosed herein can output the blanking voltage to a row of LEDs using only a single field-effect transistor in the switching module, without adopting a parallel structure of P-type field-effect transistors / N-type field-effect transistors, thus reducing the area of ​​the blanking circuit.

[0040] One application scenario of the blanking circuit in this disclosure embodiment can be related to... Figure 1 The blanking circuit shown has the same application scenarios, so it will not be described again here. Figure 2 This illustrates another application scenario of the blanking circuit according to an embodiment of the present disclosure.

[0041] See Figure 2 This application scenario is similar to Figure 1 The difference in the application scenarios shown is that the driver module is connected to the power supply voltage Vdd. In the LED array, the anode of the LED is connected to the driver module, and the cathode is connected to the column driver chip. Other information in the application scenarios is the same as... Figure 1 They can be the same, so I won't go into details here.

[0042] The exemplary structure and function of the blanking circuit in the embodiments of this disclosure are described below.

[0043] Figure 3a and Figure 3b A schematic diagram showing the structure of a blanking circuit according to an embodiment of the present disclosure is provided.

[0044] like Figure 3a and Figure 3b As shown, the blanking circuit includes a switching module and a first voltage adjustment module. The first terminal A of the switching module is connected to the first electrode a of the light-emitting diode.

[0045] The first voltage adjustment module is used to receive the first voltage signal V1 and boost it to obtain the second voltage signal V2, and output the second voltage signal V2 to the switching module. The voltage difference between the second voltage signal V2 and the first voltage signal V1 is greater than the first threshold.

[0046] The switching module is used to receive the second voltage signal V2, the third voltage signal V3, the fourth voltage signal V4, and the control signal Vctrl. The fourth voltage signal V4 is received by the second terminal B of the switching module. The level of the second voltage signal V2 is higher than the level of the third voltage signal V3.

[0047] When the control signal Vctrl is in the first state, the second voltage signal V2 turns on the first terminal A and the second terminal B of the switch module. When the control signal Vctrl is in the second state, the third voltage signal V3 turns off the first terminal A and the second terminal B of the switch module.

[0048] The first terminal a of the light-emitting diode is also connected to the driving module. The driving module also receives the control signal Vctrl. When the control signal Vctrl is in the first state, the driving module disconnects the first terminal a of the light-emitting diode from the power supply voltage Vdd or ground Gnd. When the control signal Vctrl is in the second state, the driving module connects the first terminal a of the light-emitting diode to the power supply voltage Vdd or ground Gnd.

[0049] For example, the blanking circuit may include multiple switching modules and a first voltage adjustment module. The multiple switching modules may each correspond to multiple rows of light-emitting diodes. For clarity, Figure 3a and Figure 3bOnly one switching module and one LED in the row of LEDs corresponding to that switching module are shown. Those skilled in the art will understand that each switching module in the blanking circuit and the first voltage adjustment module can be configured according to... Figure 3a and Figure 3b The connection is made using the aforementioned connection method.

[0050] Optionally, the blanking circuit may also include a voltage generation module and a buffer module. See also Figure 3b The voltage generation module has a first terminal that can be connected to ground, and a second terminal that can output an initial voltage signal V0 to the buffer module. The voltage value of the initial voltage signal V0 can be set according to the scenario requirements. This disclosure does not limit the specific voltage value of the initial voltage signal V0. In one example, the voltage generation module may include a voltage source. The cathode of the voltage source is connected to ground as the first terminal of the voltage generation module, and the anode of the voltage source is connected to the buffer module as the second terminal of the voltage generation module. The voltage source can generate an initial voltage signal V0 and output it to the buffer module through the anode. Those skilled in the art should understand that each switching module and buffer module in the blanking circuit can be configured according to... Figure 3b The connection is made using the aforementioned connection method.

[0051] The first terminal of the buffer module can be connected to the voltage generation module, and the second terminal can be connected to the second terminal B of the switching module. The buffer module enhances the driving capability of the initial voltage signal V0 and outputs a fourth voltage signal V4; therefore, the voltage value of the fourth voltage signal V4 can be greater than the voltage value of the initial voltage signal V0. In one example, the buffer module can be implemented using a unity-gain amplifier. The blanking voltage value can be preset, and the initial voltage signal value is determined based on the amplification factor of the unity-gain amplifier and the blanking voltage value, so that the voltage value of the fourth voltage signal V4 is equal to the blanking voltage value.

[0052] See Figure 3a and Figure 3b The first voltage adjustment module has a first terminal that can be connected to a power supply voltage Vdd, and a second terminal that can be connected to a switching module. The first voltage signal V1 can be the power supply voltage Vdd. The first voltage adjustment module boosts the first voltage signal V1 to obtain a second voltage signal V2, and the boost amplitude can be greater than a first threshold. The first threshold can be the threshold voltage Vth when the switching module is turned on. The second voltage signal V2 can be output to the switching module through the second terminal of the first voltage adjustment module. The boosted second voltage signal V2 can be a high-level signal.

[0053] The first voltage adjustment module can use an existing charge pump in a current-technical row driver chip or other modules or devices capable of boosting voltage. In this case, the blanking circuit requires a smaller circuit area.

[0054] The switching module may include five ports. The first port can be connected to the first electrode (a) of a light-emitting diode (LED). The second port can receive a fourth voltage signal V4. The third port can be connected to a first voltage adjustment module to receive a second voltage signal V2. The fourth port can be connected to ground to receive a third voltage signal V3, which can be a low-level signal. The fifth port can receive a control signal Vctrl. The fourth voltage signal V4 can be output through the first port. The LED can be any one of the LEDs in the row corresponding to the blanking circuit. An example of the switching module's structure can be found below. Figure 4 Related descriptions.

[0055] The blanking circuit can receive multiple control signals, each of which outputs to a corresponding switch module and a driver module connected to that switch module. Whether the first terminal of the switch module outputs a fourth voltage signal depends on the state of the received control signals. There are two states of the control signals: the first state indicates that the row of LEDs containing the light-emitting diode is off, and the blanking circuit controls the voltage of that row of LEDs; the second state indicates that the row of LEDs containing the light-emitting diode is on, and the blanking circuit does not control the voltage of that row of LEDs. Therefore, when the control signal is in the first state, the second voltage signal can connect the first and second terminals of the switch module, allowing the fourth voltage signal to be output to the light-emitting diode through the first terminal, thereby controlling the voltage of the row containing the light-emitting diode; when the control signal is in the second state, the third voltage signal can disconnect the first and second terminals of the switch module, preventing the first terminal from outputting the fourth voltage signal to the light-emitting diode and thus not controlling the voltage of the row containing the light-emitting diode.

[0056] The first terminal of the LED is also connected to the driving module, which receives a control signal. When the control signal is in a first state, the driving module disconnects the first terminal of the LED from the power supply voltage or ground. When the control signal is in a second state, the driving module connects the first terminal of the LED to the power supply voltage or ground. Specifically, when the blanking circuit is in... Figure 1 In application scenarios, the driver module can disconnect or connect the first terminal of the LED to ground (Gnd). When the blanking circuit is in... Figure 2 In certain application scenarios, the driver module can disconnect or connect the first electrode a of the LED to the power supply voltage Vdd.

[0057] For example, the control signal may include a 1-bit binary number, with a first state of 0 and a second state of 1. Those skilled in the art will understand that the control signal can also be configured in other forms, as long as the control signal can trigger the switching module and the drive module to achieve the above functions. This disclosure does not limit the specific form of the control signal.

[0058] Examples of the structure and function of the driver module can be found below. Figures 5a-7Related descriptions.

[0059] According to the blanking circuit of this disclosure embodiment, a first voltage signal is received by a first voltage adjustment module and boosted to obtain a second voltage signal. The second voltage signal is then output to a switching module. The voltage difference between the second voltage signal and the first voltage signal is greater than a first threshold, which can provide the switching module with the voltage signal required to control the first and second terminals to conduct, thereby reducing the on-resistance of the switching module and accelerating the establishment of the blanking voltage. It also allows the blanking voltage to have a wider voltage range when the switching module is on. The switching module is used to receive the second voltage signal, the third voltage signal, the fourth voltage signal, and a control signal. The fourth voltage signal is received by the second terminal of the switching module. The level of the second voltage signal is higher than the level of the third voltage signal. When the control signal is in the first state, the second voltage signal turns on the first and second terminals of the switching module, outputting the fourth voltage signal to the light-emitting diode to complete the transmission of the blanking voltage. When the control signal is in the second state, the third voltage signal turns off the first and second terminals of the switching module, preventing the output of the fourth voltage signal to the light-emitting diode, so that the blanking circuit does not affect the normal display of the light-emitting diode. The first terminal of the LED is also connected to the driving module, which receives a control signal. When the control signal is in a first state, the driving module disconnects the first terminal of the LED from the power supply voltage or ground, allowing the blanking voltage to remain constant. When the control signal is in a second state, the driving module connects the first terminal of the LED to the power supply voltage or ground, allowing the LED to display normally and stop displaying. In summary, the blanking circuit of this embodiment can reduce the on-resistance of the switching module of the blanking circuit to improve the establishment speed of the blanking voltage, while also obtaining a blanking voltage with a wide voltage range, thus improving the voltage output capability of the blanking circuit.

[0060] The exemplary structure of the switch module according to the embodiments of this disclosure is described below. Figure 4 A schematic diagram showing the structure of a switching module according to an embodiment of the present disclosure is provided.

[0061] like Figure 4 As shown, in one possible implementation, the switch module includes a first switch S1, a second switch S2, and a third switch S3.

[0062] The first terminal of the first switch S1 receives the second voltage signal V2, the second terminal of the first switch S1 is connected to the third terminal of the third switch S3, and the third terminal of the first switch S1 receives the control signal Vctrl.

[0063] The first terminal of the second switch S2 receives the third voltage signal V3, the second terminal of the second switch S2 is connected to the third terminal of the third switch S3, and the third terminal of the second switch S2 receives the control signal Vctrl.

[0064] The first terminal of the third switch S3 serves as the second terminal B of the switch module, receiving the fourth voltage signal. The second terminal of the third switch S2 serves as the first terminal A of the switch module, connected to the first electrode a of the light-emitting diode.

[0065] For example, see Figure 4 The switch module may include three switches. The third switch S3 can control the conduction and disconnection of the first and second terminals of the third switch according to the signal received at the third terminal. The first switch S1 and the second switch S2 control the signal received at the third terminal of the third switch S3.

[0066] For example, the third terminal of the first switch S1 and the third terminal of the second switch S2 can respectively receive the control signal Vctrl. When the control signal Vctrl is in the first state, the first and second terminals of the first switch S1 are turned on, and the second voltage signal V2 received by the first terminal of the first switch S1 is output to the third terminal of the third switch S3; the first and second terminals of the second switch S2 are turned off, and the third voltage signal V3 received by the first terminal of the second switch S2 is not output to the third terminal of the third switch S3. Therefore, the third terminal of the third switch S3 receives the second voltage signal V2. The second voltage signal V3 can turn on the first and second terminals of the third switch S3, and the fourth voltage signal V4 can be transmitted through the first and second terminals of the third switch S3 to the first electrode a of the light-emitting diode, completing the output of the blanking voltage.

[0067] When the control signal Vctrl is in the second state, the first and second terminals of the first switch S1 are open. At this time, the second voltage signal V2 received at the first terminal of the first switch S1 will not be output to the third terminal of the third switch S3. The first and second terminals of the second switch S2 are closed. At this time, the third voltage signal V3 received at the first terminal of the second switch S2 is output to the third terminal of the third switch S3. Therefore, the third terminal of the third switch S3 receives the third voltage signal V3. The third voltage signal V3 can disconnect the first and second terminals of the third switch S1. At this time, the fourth voltage signal V4 cannot be output to the second terminal of the third switch S3, and therefore will not be transmitted to the first electrode a of the LED, thus not affecting the LED display.

[0068] In this way, the switching module can respond to control signals in different states and control whether the blanking voltage is output, ensuring that the LED display is not affected, while also avoiding voltage coupling when the LED is no longer displaying.

[0069] In one possible implementation, the third switch is an N-type field-effect transistor, and the first threshold is greater than or equal to the threshold voltage of the third switch.

[0070] For example, since the second voltage signal V2 is a high-level signal and the third voltage signal V3 is a low-level signal, the third switch turns on when it receives a high-level signal and turns off when it receives a low-level signal. Therefore, the third switch can be implemented using an N-type field-effect transistor. The third terminal of the third switch can be the gate, the first terminal can be the source, and the second terminal can be the drain.

[0071] The first threshold can be set to be greater than or equal to the threshold voltage Vth of the third switch. In this case, the voltage value of the second voltage signal V2 is greater than the sum of the first voltage signal V1 and the first threshold, i.e., V4 ≥ Vdd + Vth. For an N-type field-effect transistor switch, the voltage value on the source / drain needs to be less than the difference between the gate voltage (V4) and the threshold voltage (Vth) when the N-type field-effect transistor is turned on, V4 - Vth ≥ Vdd. Therefore, the voltage value of the fourth voltage signal can reach the range of 0 to Vdd or even larger. This achieves the effect of increasing the voltage range of the blanking voltage.

[0072] Furthermore, the build-up speed of the blanking voltage is related to the resistance of the switch; the smaller the switch resistance, the faster the build-up speed. For a given size, the on-resistance of the MOSFET is also related to the voltage between the gate and source when it is turned on. For an N-type MOSFET, the greater the voltage difference between the gate and source, the smaller the on-resistance. The embodiments of this disclosure allow the gate of the third switch to receive a larger voltage, thus reducing the on-resistance of the third switch, further reducing its area and cost, and improving the build-up speed of the blanking voltage.

[0073] The first and second switches can be implemented using field-effect transistors or other types of switches, and this disclosure does not limit them.

[0074] The way the control signal turns the first switch / second switch on and off in different states can be achieved based on existing technology, and will not be elaborated here.

[0075] The following describes an exemplary structure of the driver module. Figure 5a and Figure 5b A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0076] In one possible implementation, the driver module includes a driver transistor.

[0077] like Figure 5a As shown, when the first terminal of the driving transistor is connected to the power supply voltage, the second terminal of the driving transistor is connected to the first terminal a of the light-emitting diode, the third terminal of the driving transistor receives the control signal Vctrl, and the second terminal of the light-emitting diode is connected to ground Gnd through a current source.

[0078] like Figure 5bAs shown, when the first terminal of the driving transistor is connected to ground Gnd, the second terminal of the driving transistor is connected to the first terminal a of the light-emitting diode, the third terminal of the driving transistor receives the control signal Vctrl, and the second terminal of the light-emitting diode is connected to the power supply voltage Vdd through a current source.

[0079] For example, in the application of the driver module Figure 2 In the illustrated application scenario, the first terminal (source) of the driving transistor can be connected to the power supply voltage, and the second terminal (drain) of the driving transistor can be connected to the first terminal (anode) of the light-emitting diode (LED). The third terminal of the driving transistor can receive control signals. The second terminal (cathode) of the LED is connected to the power supply voltage through a current source. In this case, the driving transistor can be a P-type field-effect transistor (FET).

[0080] In the application of the driver module Figure 1 In the illustrated application scenario, the first terminal (source) of the driving transistor can be connected to ground, and the second terminal (drain) of the driving transistor can be connected to the first terminal (cathode) of the light-emitting diode. The third terminal of the driving transistor can receive control signals. The second terminal (anode) of the light-emitting diode is connected to the power supply voltage through a current source.

[0081] When the control signal is in the first state, the first and second terminals of the driving transistor can be disconnected to prevent the first terminal of the LED from conducting with the power supply voltage, which would affect the stability of the blanking voltage. When the control signal is in the second state, the first and second terminals of the driving transistor can conduct, allowing the first terminal of the LED to conduct with the power supply voltage. A current path is formed between the power supply voltage, the current source, the driving transistor, and the LED, allowing the LED to display normally. In this case, the driving transistor can be an N-type field-effect transistor.

[0082] This approach allows for a wider selection of the types of driving transistors.

[0083] Figure 6 A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0084] like Figure 6 As shown, in one possible implementation, the driving module includes a driving transistor, a fourth switch S4, a fifth switch S5, and a second voltage adjustment module.

[0085] The first terminal of the driving transistor is connected to ground Gnd, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch S4 and the first terminal of the fifth switch S5.

[0086] The second terminal of the fourth switch S4 is connected to ground, and the second terminal of the fifth switch S5 is connected to the power supply voltage Vdd through the second voltage adjustment module.

[0087] The third terminal of the fourth switch S4 and the third terminal of the fifth switch S5 receive the control signal Vctrl;

[0088] The second voltage adjustment module is used to receive the fifth voltage signal V5 and boost it to obtain the sixth voltage signal V6, and output the sixth voltage signal V6 to the fifth switch S5;

[0089] When the control signal Vctrl is in the first state, the first and second terminals of the fourth switch S4 are turned on, and the first and second terminals of the fifth switch S5 are turned off.

[0090] When the control signal Vctrl is in the second state, the first and second terminals of the fourth switch S4 are disconnected, and the first and second terminals of the fifth switch S5 are connected.

[0091] For example, when the driving transistor is an N-type field-effect transistor, a second voltage adjustment module can be added to the driving module to increase the voltage of the signal output to the gate of the driving transistor. When the control signal is in the first state, the driving module disconnects the first terminal of the LED from ground Gnd; when the control signal is in the second state, the driving module connects the first terminal of the LED to ground Gnd. Therefore, a fourth and fifth switch can be further added to output a signal with the same level as the control signal to the gate of the driving transistor.

[0092] The first terminal (source) of the driving transistor can be connected to ground Gnd (applied to...). Figure 1 In application scenarios, the second electrode (drain) of the driving transistor is connected to the first electrode (cathode) of the light-emitting diode.

[0093] The third terminal (gate) of the driving transistor can be connected to the first terminals of the fourth and fifth switches. The second terminal of the fourth switch is connected to ground, and the second terminal of the fifth switch is connected to the power supply voltage through the second voltage adjustment module. The second voltage adjustment module receives the fifth voltage signal (i.e., the power supply voltage, therefore the fifth voltage signal can be a high-level signal) and boosts it to obtain a sixth voltage signal, which is then output to the fifth switch. In this case, if the fourth switch is on, a low-level signal can be output to the third terminal (gate) of the driving transistor. If the fifth switch is on, a high-level sixth voltage signal can be output to the third terminal (gate) of the driving transistor.

[0094] The third terminals of the fourth and fifth switches respectively receive control signals. When the control signal is in the first state, the first and second terminals of the fourth switch are connected, and the first and second terminals of the fifth switch are disconnected. A low-level signal can be output to the third terminal (gate) of the driving transistor, causing the first and second terminals of the driving transistor to disconnect. When the control signal is in the second state, the first and second terminals of the fourth switch are disconnected, and the first and second terminals of the fifth switch are connected. A high-level sixth voltage signal can be output to the third terminal (gate) of the driving transistor, causing the first and second terminals of the driving transistor to connect.

[0095] The fourth and fifth switches can be implemented using field-effect transistors or other types of switches, and this disclosure does not limit them.

[0096] The way the control signal turns the fourth / fifth switch on and off in different states can be achieved based on existing technology, and will not be elaborated here.

[0097] Figure 7 A schematic diagram showing the structure of a driver module according to an embodiment of the present disclosure is provided.

[0098] like Figure 7 As shown, in one possible implementation, the driving module includes a driving transistor, a fourth switch S4, and a fifth switch S5.

[0099] The first terminal of the driving transistor is connected to ground Gnd, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch S4 and the first terminal of the fifth switch S5.

[0100] The second terminal of the fourth switch S4 is connected to ground, and the second terminal of the fifth switch S5 is connected to the second terminal of the first voltage adjustment module.

[0101] The third terminal of the fourth switch S4 and the third terminal of the fifth switch S5 receive the control signal Vctrl;

[0102] When the control signal Vctrl is in the first state, the first and second terminals of the fourth switch S4 are turned on, and the first and second terminals of the fifth switch S5 are turned off.

[0103] When the control signal Vctrl is in the second state, the first and second terminals of the fourth switch S4 are disconnected, and the first and second terminals of the fifth switch S5 are connected.

[0104] For example, since both the driving module and the blanking circuit are located in the row driver chip, and the blanking circuit includes a first voltage adjustment module, when the driving transistor is an N-type field-effect transistor, the third terminal (gate) of the driving transistor can be connected to the second terminal of the first voltage adjustment module through the fifth switch, and the second voltage signal V2 output from the second terminal of the first voltage adjustment module can be used instead of... Figure 6 And the high-level sixth voltage signal mentioned in the relevant description. Figure 7 The connection methods and functions of other devices in the middle Figure 6 The descriptions in the relevant documents can be the same. In this case, the area and cost of the driver module are further reduced, even though the area and cost of the driver transistor have already been reduced.

[0105] Figure 6 and Figure 7 The described driving transistor is turned on at a high level, so it can be an N-type field-effect transistor. In this case, as long as the gate voltage of the driving transistor is greater than the supply voltage Vdd, the on-resistance will be lower, the area and cost of the driving transistor will be smaller, and the overall cost of the row driver chip can be reduced.

[0106] Those skilled in the art should understand that the structures of the switching module and the drive module mentioned above are merely examples, provided that the switching module and the drive module can complete the task. Figure 2 The specific structure of the switch module and the drive module is not limited to the functions described in the relevant descriptions in this disclosure.

[0107] This disclosure also proposes a chip including the blanking circuit and driving module described in any of the above descriptions. Exemplarily, the chip may be... Figure 1 And the row driver chip mentioned in the related description. An example of the chip's structure can be found in [link to relevant documentation]. Figure 1 The structure of the row driver chip.

[0108] This disclosure also proposes a display panel including the chip described above (row driver chip). Exemplarily, the display panel may further include an LED array and a column driver chip. A schematic diagram of the display panel structure can be found in [reference needed]. Figure 1 .

[0109] In one possible implementation, the display panel includes at least one of a liquid crystal display panel, a micro light-emitting diode display panel, a light-emitting diode display panel, a mini light-emitting diode display panel, a quantum dot light-emitting diode display panel, an organic light-emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electrowetting display panel, and a small-pitch display panel.

[0110] This disclosure also proposes an electronic device including the display panel described above.

[0111] For example, the electronic devices in this embodiment include, but are not limited to, desktop computers, televisions, mobile devices with large screens such as mobile phones and tablets, and other common electronic devices that require multiple chips to be cascaded together to achieve driving.

[0112] For example, electronic devices can also be user equipment (UE), mobile devices, user terminals, terminals, handheld devices, computing devices, or in-vehicle devices, etc. Examples of terminals include: displays, smartphones or portable devices, mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and wireless terminals in vehicle-to-everything (V2X) networks, etc. For example, a server can be a local server or a cloud server.

[0113] Figure 8 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown. For example, the electronic device 1900 may be provided as a server or a terminal device. (Refer to...) Figure 8 The electronic device 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the methods described above.

[0114] Electronic device 1900 may also include a power supply component 1926 configured to perform power management of electronic device 1900, a wired or wireless network interface 1950 configured to connect electronic device 1900 to a network, and an input / output (I / O) interface 1958. Electronic device 1900 can operate on an operating system stored in memory 1932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0115] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of an electronic device 1900 to perform the above-described method.

[0116] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

[0117] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0118] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0119] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0120] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A blanking circuit, characterized in that, It includes a switch module and a first voltage adjustment module, wherein the first terminal of the switch module is connected to the first electrode of a light-emitting diode. The first voltage adjustment module is used to receive a first voltage signal and boost it to obtain a second voltage signal, and output the second voltage signal to the switching module. The voltage difference between the second voltage signal and the first voltage signal is greater than a first threshold. The switching module is used to receive the second voltage signal, the third voltage signal, the fourth voltage signal, and the control signal. The fourth voltage signal is received by the second terminal of the switching module, and the level of the second voltage signal is higher than the level of the third voltage signal. When the control signal is in the first state, the second voltage signal turns on the first and second terminals of the switch module; when the control signal is in the second state, the third voltage signal turns off the first and second terminals of the switch module. The first terminal of the light-emitting diode is also connected to the driving module. The driving module also receives the control signal. When the control signal is in a first state, the driving module disconnects the first terminal of the light-emitting diode from the power supply voltage or ground. When the control signal is in a second state, the driving module connects the first terminal of the light-emitting diode to the power supply voltage or ground.

2. The blanking circuit according to claim 1, characterized in that, The switch module includes a first switch, a second switch, and a third switch. The first terminal of the first switch receives the second voltage signal, the second terminal of the first switch is connected to the third terminal of the third switch, and the third terminal of the first switch receives the control signal. The first terminal of the second switch receives the third voltage signal, the second terminal of the second switch is connected to the third terminal of the third switch, and the third terminal of the second switch receives the control signal. The first end of the third switch serves as the second end of the switch module, receiving the fourth voltage signal. The second end of the third switch serves as the first end of the switch module, connected to the first electrode of the light-emitting diode.

3. The blanking circuit according to claim 2, characterized in that, The third switch is an N-type field-effect transistor, and the first threshold is greater than or equal to the threshold voltage of the third switch.

4. The blanking circuit according to claim 1, characterized in that, The driving module includes a driving transistor. When the first terminal of the driving transistor is connected to the power supply voltage, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, the third terminal of the driving transistor receives the control signal, and the second terminal of the light-emitting diode is connected to ground through a current source; When the first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, the third terminal of the driving transistor receives the control signal, and the second terminal of the light-emitting diode is connected to the power supply voltage through a current source.

5. The blanking circuit according to claim 1, characterized in that, The drive module includes a drive transistor, a fourth switch, a fifth switch, and a second voltage adjustment module. The first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch and the first terminal of the fifth switch. The second terminal of the fourth switch is connected to ground, and the second terminal of the fifth switch is connected to the power supply voltage through the second voltage adjustment module. The third terminal of the fourth switch and the third terminal of the fifth switch receive the control signal; The second voltage adjustment module is used to receive the fifth voltage signal and boost it to obtain the sixth voltage signal, and output the sixth voltage signal to the fifth switch; When the control signal is in the first state, the first and second terminals of the fourth switch are turned on, and the first and second terminals of the fifth switch are turned off. When the control signal is in the second state, the first and second terminals of the fourth switch are disconnected, and the first and second terminals of the fifth switch are connected.

6. The blanking circuit according to claim 1, characterized in that, The driving module includes a driving transistor, a fourth switch, and a fifth switch. The first terminal of the driving transistor is connected to ground, the second terminal of the driving transistor is connected to the first terminal of the light-emitting diode, and the third terminal of the driving transistor is connected to the first terminal of the fourth switch and the first terminal of the fifth switch. The second terminal of the fourth switch is connected to ground, and the second terminal of the fifth switch is connected to the second terminal of the first voltage adjustment module; The third terminal of the fourth switch and the third terminal of the fifth switch receive the control signal; When the control signal is in the first state, the first and second terminals of the fourth switch are turned on, and the first and second terminals of the fifth switch are turned off. When the control signal is in the second state, the first and second terminals of the fourth switch are disconnected, and the first and second terminals of the fifth switch are connected.

7. A chip, characterized in that, Includes the blanking circuit and driving module as described in any one of claims 1-6.

8. A display panel, characterized in that, Includes the chip described in claim 7.

9. The display panel according to claim 8, characterized in that, The display panel includes at least one of the following: liquid crystal display panel, micro light-emitting diode display panel, light-emitting diode display panel, mini light-emitting diode display panel, quantum dot light-emitting diode display panel, organic light-emitting diode display panel, cathode ray tube display panel, digital light processing display panel, field emission display panel, plasma display panel, electrophoretic display panel, electrowetting display panel, and small-pitch display panel.

10. An electronic device, characterized in that, Includes the display panel as described in claim 8 or 9.

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