LED display driving circuit, driving chip, control device and electronic equipment

Abstract

The utility model relates to the technical field of display, in particular to an LED display driving circuit, a driving chip, a control device and electronic equipment, the LED display driving circuit comprises an operational amplifier, the output end of the operational amplifier is coupled to the grid electrode of a first transistor and the source electrode of the first transistor, the first end of each current adjusting unit is used for receiving power supply voltage, and the second end of each current adjusting unit is used for receiving power supply voltage. The positive input end of the operational amplifier is coupled to the drain electrode of the first transistor and the first end of the first resistor, the negative input end of the operational amplifier is coupled to the second end of the first resistor and the second ends of the current adjusting units, and a common node of the second ends of the current adjusting units serves as the output end of the driving circuit and is used for outputting target current. The voltage between the positive input end of the operational amplifier and the negative input end of the operational amplifier is configured to be preset voltage, and each current adjusting unit is used for adjusting the magnitude of the target current. According to the embodiment of the utility model, the cost can be reduced, and the driving efficiency, convenience and flexibility are improved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to an LED display driver circuit and driver chip, control device, and electronic device. Background Technology

[0002] Currently, in LED display driver chips, the driver stage's role is to output a constant current to the external LED. A common approach is to generate a reference current source, IREF, which is a reference current independent of process, temperature, and power supply. The output current can be set to an integer multiple of IREF, K, with the value of K determined by the customer. Current LED display driver chips typically use a fixed current source to generate a constant current; however, this method suffers from low driving efficiency. Utility Model Content

[0003] According to one aspect of the present invention, an LED display driving circuit is provided, the LED display driving circuit comprising: an operational amplifier, multiple current adjustment units, a first transistor, and a first resistor, wherein,

[0004] The output terminal of the operational amplifier is coupled to the gate of the first transistor, and the source of the first transistor and the first terminal of each current regulation unit are used to receive the power supply voltage.

[0005] The positive input terminal of the operational amplifier is coupled to the drain of the first transistor and the first terminal of the first resistor.

[0006] The negative input terminal of the operational amplifier is coupled to the second terminal of the first resistor and the second terminal of each current adjustment unit. The common node of the second terminals of each current adjustment unit serves as the output terminal of the LED display driver circuit, used to output the target current.

[0007] The voltage between the positive input terminal and the negative input terminal of the operational amplifier is configured to a preset voltage.

[0008] Each current adjustment unit is used to adjust the magnitude of the target current.

[0009] In one possible implementation, each current regulating unit includes a first regulating switch, a second regulating switch, a regulating transistor, and a regulating resistor, wherein,

[0010] The first terminal of the first regulating switch is connected to the gate of the first transistor, and the second terminal of the first regulating switch is connected to the second terminal of the second regulating switch and the gate of the regulating transistor.

[0011] The first terminal of the second regulating switch is connected to the source of the regulating transistor, serving as the first terminal of the current regulating unit for receiving the power supply voltage.

[0012] The drain of the regulating transistor is connected to the first terminal of the regulating resistor.

[0013] The second end of the regulating resistor serves as the second end of the current regulating unit.

[0014] In one possible implementation, the LED display driving circuit further includes a first control switch, a second control switch, a third control switch, a fourth control switch, a fifth control switch, a sixth control switch, and a first capacitor, wherein...

[0015] The first terminal of the first control switch is used to receive the preset voltage.

[0016] The positive input terminal of the operational amplifier is connected to the second terminal of the first control switch and the first terminal of the second control switch. The second terminal of the second control switch is connected to the drain of the first transistor and the first terminal of the first resistor.

[0017] The negative input terminal of the operational amplifier is connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is connected to the first terminal of the third control switch and the first terminal of the fourth control switch.

[0018] The second terminal of the third control switch is grounded.

[0019] The second terminal of the fourth control switch is connected to the second terminal of the first resistor and the second terminal of each current regulating unit.

[0020] The first terminal of the fifth control switch is used to receive the power supply voltage, and the second terminal of the fifth control switch is connected to the first terminal of the sixth control switch and the gate of the first transistor.

[0021] The second terminal of the sixth control switch is connected to the output terminal of the operational amplifier, the inverting input terminal of the operational amplifier, and the first terminal of the first capacitor.

[0022] In one possible implementation, each switch is used to receive a switch control signal, wherein...

[0023] When the switch control signal is low, the first adjustment switch, the first control switch, the third control switch, and the fifth control switch of each current adjustment unit are turned on and the remaining switches are turned off, and the LED display driving circuit operates in sampling mode;

[0024] When the switch control signal is high, the second adjustment switch, the second control switch, the fourth control switch, and the sixth control switch of each current adjustment unit are turned on and the remaining switches are turned off. The LED display driving circuit operates in constant current output mode. In constant current output mode, the output terminal of the LED display driving circuit outputs the target current.

[0025] In one possible implementation, the positive input terminal includes a first positive input terminal and a second positive input terminal, and the negative input terminal includes a first negative input terminal and a second negative input terminal, wherein...

[0026] The first positive input terminal is connected to the drain of the first transistor and the first end of the first resistor, and the first negative input terminal is connected to the second end of the first resistor and the second end of each current adjustment unit.

[0027] The second positive input terminal is used to receive the preset voltage, and the second negative input terminal is grounded.

[0028] According to one aspect of the present invention, a driver chip is provided, the driver chip including the LED display driver circuit described above.

[0029] According to one aspect of the present invention, a control device is provided, the control device comprising a control chip and the aforementioned drive chip.

[0030] According to one aspect of the present invention, an electronic device is provided, the electronic device including a display panel and the aforementioned driver chip.

[0031] In one possible implementation, the display panel includes any one of an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a mini light-emitting diode display panel, and a micro light-emitting diode display panel.

[0032] In one possible implementation, the electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet, laptop, all-in-one computer, access control device, and electronic door lock.

[0033] The LED display driving circuit of this utility model embodiment does not use a current source to generate the target current, which can reduce costs and improve driving efficiency compared with related technologies. By setting multiple current adjustment units, the output target current can be adjusted, which improves the convenience and flexibility of adjustment. By configuring the voltage between the positive input terminal and the negative input terminal of the operational amplifier to a preset voltage, the output terminal can output a stable and accurate target current.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the present invention. Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the technical solutions of the present invention.

[0036] Figure 1 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0037] Figure 2 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0038] Figure 3 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0039] Figure 4 A schematic diagram of a switch control signal according to an embodiment of the present invention is shown. Detailed Implementation

[0040] Various exemplary embodiments, features, and aspects of the present invention 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.

[0041] In the description of this utility model, 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. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "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 utility model according to the specific circumstances.

[0044] 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.

[0045] 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.

[0046] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this utility model.

[0047] Please see Figure 1 , Figure 1 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0048] like Figure 1 As shown, the LED display driving circuit includes: an operational amplifier Amp, multiple current adjustment units 10, a first transistor Q1, and a first resistor R1, wherein,

[0049] The output terminal of the operational amplifier Amp is coupled to the gate of the first transistor Q1. The source of the first transistor Q1 and the first terminal of each current adjustment unit 10 are used to receive the power supply voltage AVDD.

[0050] The positive input terminal of the operational amplifier Amp is coupled to the drain of the first transistor Q1 and the first terminal of the first resistor R1.

[0051] The negative input terminal of the operational amplifier Amp is coupled to the second terminal of the first resistor R1 and the second terminal of each current adjustment unit 10. The common node of the second terminals of each current adjustment unit 10 serves as the output terminal of the LED display driver circuit, used to output the target current.

[0052] The voltage between the positive input terminal and the negative input terminal of the operational amplifier Amp is configured to a preset voltage VREF.

[0053] Each current adjustment unit 10 is used to adjust the magnitude of the target current.

[0054] The LED display driving circuit of this embodiment of the utility model does not utilize a current source to generate the target current, which can reduce costs and improve driving efficiency. By setting multiple current adjustment units 10, the output target current can be adjusted, which improves the convenience and flexibility of adjustment. By configuring the voltage between the positive input terminal and the negative input terminal of the operational amplifier Amp to a preset voltage VREF, the output terminal can output a stable and accurate target current.

[0055] Each component of this utility model embodiment (such as operational amplifier Amp, current adjustment unit 10, etc.) can be implemented by hardware circuits, and this utility model embodiment does not limit the specific implementation method.

[0056] This utility model embodiment does not limit the specific implementation of the current adjustment unit 10. Those skilled in the art can implement it using hardware circuits from related technologies according to actual conditions and needs.

[0057] Please see Figure 2 , Figure 2 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0058] In one possible implementation, such as Figure 2 As shown, each current regulation unit 10 may include a first regulation switch Sd1, a second regulation switch Sd2, a regulation transistor Qd1, and a regulation resistor Rd1, wherein,

[0059] The first terminal of the first regulating switch Sd1 is connected to the gate of the first transistor Q1, and the second terminal of the first regulating switch Sd1 is connected to the second terminal of the second regulating switch Sd2 and the gate of the regulating transistor Qd1.

[0060] The first terminal of the second regulating switch Sd2 and the source of the regulating transistor Qd1 are connected together to form the first terminal of the current regulating unit 10, which is used to receive the power supply voltage AVDD.

[0061] The drain of the regulating transistor Qd1 is connected to the first terminal of the regulating resistor Rd1.

[0062] The second end of the regulating resistor Rd1 serves as the second end of the current regulating unit 10, and the common node of the second ends of each regulating resistor Rd1 is used to output the target current IOUT through the output pin (PIN).

[0063] This embodiment of the invention sets an adjustment resistor Rd1 on the adjustment transistor Qd1 in the current adjustment unit 10, avoiding the direct connection of the drain of the adjustment transistor Qd1 to the output pin (PAD). Therefore, there is no need to consider ESD issues separately, which can reduce additional circuit overhead and circuit area.

[0064] For example, each regulating transistor Qd1 and the first transistor Q1 can be a PMOS transistor.

[0065] Please see Figure 3 , Figure 3 A schematic diagram of an LED display driving circuit according to an embodiment of the present invention is shown.

[0066] In one possible implementation, such as Figure 3 As shown, the LED display driving circuit may further include a first control switch Sc1, a second control switch Sc2, a third control switch Sc3, a fourth control switch Sc4, a fifth control switch Sc5, a sixth control switch Sc6, and a first capacitor C1, wherein,

[0067] The first terminal of the first control switch Sc1 is used to receive the preset voltage VREF.

[0068] The positive input terminal of the operational amplifier Amp is connected to the second terminal of the first control switch Sc1 and the first terminal of the second control switch Sc2. The second terminal of the second control switch Sc2 is connected to the drain of the first transistor Q1 and the first terminal of the first resistor R1.

[0069] The negative input terminal of the operational amplifier Amp is connected to the first terminal of the first capacitor C1, and the second terminal of the first capacitor C1 is connected to the first terminal of the third control switch Sc3 and the first terminal of the fourth control switch Sc4.

[0070] The second terminal of the third control switch Sc3 is grounded.

[0071] The second terminal of the fourth control switch Sc4 is connected to the second terminal of the first resistor R1 and the second terminal of each current adjustment unit 10.

[0072] The first terminal of the fifth control switch Sc5 is used to receive the power supply voltage AVDD, and the second terminal of the fifth control switch Sc5 is connected to the first terminal of the sixth control switch Sc6 and the gate of the first transistor Q1.

[0073] The second terminal of the sixth control switch Sc6 is connected to the output terminal of the operational amplifier Amp, the inverting input terminal of the operational amplifier Amp, and the first terminal of the first capacitor C1.

[0074] The above-mentioned configuration of the voltage between the positive input terminal and the negative input terminal of the operational amplifier Amp is achieved by the first control switch Sc1 and the third control switch Sc3, which is set to a preset voltage VREF. However, the present invention is not limited to this, and those skilled in the art can set it according to actual conditions and needs.

[0075] For example, in one possible implementation, such as Figure 1 As shown, the positive input terminal includes a first positive input terminal and a second positive input terminal, and the negative input terminal includes a first negative input terminal and a second negative input terminal, wherein,

[0076] The first positive input terminal is connected to the drain of the first transistor Q1 and the first end of the first resistor R1, and the first negative input terminal is connected to the second end of the first resistor R1 and the second end of each current adjustment unit 10.

[0077] The second positive input terminal is used to receive the preset voltage VREF, and the second negative input terminal is grounded.

[0078] Thus, in this embodiment of the invention, the second positive input terminal is used to receive the preset voltage VREF, and the second negative input terminal is grounded, so that the voltage between the first positive input terminal and the first negative input terminal can be configured to be the preset voltage VREF.

[0079] This embodiment of the invention does not limit the control method of each of the above switches, and those skilled in the art can set it according to the actual situation and needs.

[0080] Please see Figure 4 , Figure 4 A schematic diagram of a switch control signal according to an embodiment of the present invention is shown.

[0081] like Figure 4 As shown, the switch control signal can be a PWM signal, configured to periodically change between low and high levels.

[0082] In one possible implementation, each switch is used to receive a switch control signal, wherein...

[0083] When the switch control signal is low, the first adjustment switch Sd1, the first control switch Sc1, the third control switch Sc3, and the fifth control switch Sc5 of each current adjustment unit 10 are turned on and the other switches are turned off, and the LED display driving circuit operates in sampling mode.

[0084] When the switch control signal is high, the second adjustment switch Sd2, the second control switch Sc2, the fourth control switch Sc4, and the sixth control switch Sc6 of each current adjustment unit 10 are turned on and the other switches are turned off. The LED display driving circuit operates in constant current output mode. In constant current output mode, the output terminal of the LED display driving circuit outputs the target current.

[0085] For example, the working state of the PWM signal (switch control signal) control circuit is as follows: when PWM = 0 (low level), it is in sampling mode. The first adjustment switch Sd1, the first control switch Sc1, the third control switch Sc3, and the fifth control switch Sc5 are closed, and the second adjustment switch Sd2, the second control switch Sc2, the fourth control switch Sc4, and the sixth control switch Sc6 of the current adjustment unit 10 are open. At this time, the voltage difference across the first capacitor C1 is VREF, which is achieved by utilizing the clamping function of the operational amplifier Amp.

[0086] When PWM=1, the first adjustment switch Sd1, the first control switch Sc1, the third control switch Sc3, and the fifth control switch Sc5 are open, and the second adjustment switch Sd2, the second control switch Sc2, the fourth control switch Sc4, and the sixth control switch Sc6 of the current adjustment unit 10 are closed, which is the constant current output mode. Since there is no other discharge path for the charge on the first capacitor C1 in the sampling mode, the voltage difference across the first resistor R1 is equal to VREF. The number of current branches can be changed by VREF / R to achieve the adjustment of the output current.

[0087] This embodiment of the invention does not limit the method of generating the switch control signal. Those skilled in the art can set it according to actual conditions and needs. For example, the switch control signal can be generated by a control module. The control module may include a processing component. In one example, the processing component includes, but is not limited to, a separate processor, discrete components, or a combination of a processor and discrete components. The processor may include a controller in an electronic device with instruction execution capabilities. The processor can be implemented in any suitable manner, for example, by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components. Within the processor, the executable instructions can be executed by hardware circuits such as logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers.

[0088] Of course, in this embodiment of the invention, the first regulating switch Sd1 and the second regulating switch Sd2 in each current regulating unit 10 can be controlled individually to select the corresponding current regulating unit 10 to enter the working state or not enter the working state, thereby realizing the regulation of the target current. For example, the first regulating switch Sd1 and the second regulating switch Sd2 of one or more current regulating units 10 can be controlled to be disconnected, so that one or more current regulating units 10 do not enter the working state, and the remaining current regulating switches normally receive the switch control signal to enter the working state.

[0089] According to one aspect of the present invention, a driver chip is provided, the driver chip including the LED display driver circuit described above.

[0090] According to one aspect of the present invention, a control device is provided, the control device comprising a control chip and the aforementioned drive chip.

[0091] According to one aspect of the present invention, an electronic device is provided, the electronic device including a display panel and the aforementioned driver chip.

[0092] In one possible implementation, the display panel includes any one of an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a mini light-emitting diode display panel, and a micro light-emitting diode display panel.

[0093] In one possible implementation, the electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet, laptop, all-in-one computer, access control device, and electronic door lock.

[0094] Of course, electronic devices can also be other types of terminal devices. For example, terminal devices can be user equipment (UE), mobile devices, user terminals, terminals, handheld devices, computing devices, or in-vehicle devices. Examples of terminals include: 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. For example, a server can be a local server or a cloud server.

[0095] The various embodiments of the present invention 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. An LED display driving circuit, characterized in that, The LED display driving circuit includes: an operational amplifier, multiple current adjustment units, a first transistor, and a first resistor, wherein, The output terminal of the operational amplifier is coupled to the gate of the first transistor, and the source of the first transistor and the first terminal of each current regulation unit are used to receive the power supply voltage. The positive input terminal of the operational amplifier is coupled to the drain of the first transistor and the first terminal of the first resistor. The negative input terminal of the operational amplifier is coupled to the second terminal of the first resistor and the second terminal of each current adjustment unit. The common node of the second terminals of each current adjustment unit serves as the output terminal of the LED display driver circuit, used to output the target current. The voltage between the positive input terminal and the negative input terminal of the operational amplifier is configured to a preset voltage. Each current adjustment unit is used to adjust the magnitude of the target current.

2. The LED display driving circuit according to claim 1, characterized in that, Each current regulating unit includes a first regulating switch, a second regulating switch, a regulating transistor, and a regulating resistor, wherein, The first terminal of the first regulating switch is connected to the gate of the first transistor, and the second terminal of the first regulating switch is connected to the second terminal of the second regulating switch and the gate of the regulating transistor. The first terminal of the second regulating switch is connected to the source of the regulating transistor, serving as the first terminal of the current regulating unit for receiving the power supply voltage. The drain of the regulating transistor is connected to the first terminal of the regulating resistor. The second end of the regulating resistor serves as the second end of the current regulating unit.

3. The LED display driving circuit according to claim 2, characterized in that, The LED display driving circuit further includes a first control switch, a second control switch, a third control switch, a fourth control switch, a fifth control switch, a sixth control switch, and a first capacitor, wherein... The first terminal of the first control switch is used to receive the preset voltage. The positive input terminal of the operational amplifier is connected to the second terminal of the first control switch and the first terminal of the second control switch. The second terminal of the second control switch is connected to the drain of the first transistor and the first terminal of the first resistor. The negative input terminal of the operational amplifier is connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is connected to the first terminal of the third control switch and the first terminal of the fourth control switch. The second terminal of the third control switch is grounded. The second terminal of the fourth control switch is connected to the second terminal of the first resistor and the second terminal of each current regulating unit. The first terminal of the fifth control switch is used to receive the power supply voltage, and the second terminal of the fifth control switch is connected to the first terminal of the sixth control switch and the gate of the first transistor. The second terminal of the sixth control switch is connected to the output terminal of the operational amplifier, the inverting input terminal of the operational amplifier, and the first terminal of the first capacitor.

4. The LED display driving circuit according to claim 3, characterized in that, Each switch is used to receive switch control signals, among which, When the switch control signal is low, the first adjustment switch, the first control switch, the third control switch, and the fifth control switch of each current adjustment unit are turned on and the remaining switches are turned off, and the LED display driving circuit operates in sampling mode; When the switch control signal is high, the second adjustment switch, the second control switch, the fourth control switch, and the sixth control switch of each current adjustment unit are turned on and the remaining switches are turned off. The LED display driving circuit operates in constant current output mode. In constant current output mode, the output terminal of the LED display driving circuit outputs the target current.

5. The LED display driving circuit according to claim 1, characterized in that, The positive input terminal includes a first positive input terminal and a second positive input terminal, and the negative input terminal includes a first negative input terminal and a second negative input terminal, wherein... The first positive input terminal is connected to the drain of the first transistor and the first end of the first resistor, and the first negative input terminal is connected to the second end of the first resistor and the second end of each current adjustment unit. The second positive input terminal is used to receive the preset voltage, and the second negative input terminal is grounded.

6. A driver chip, characterized in that, The driver chip includes the LED display driver circuit as described in any one of claims 1-5.

7. A control device, characterized in that, The control device includes a control chip and a driver chip as described in claim 6.

8. An electronic device, characterized in that, The electronic device includes a display panel and a control device as described in claim 7.

9. The electronic device according to claim 8, characterized in that, The display panel includes any one of organic light-emitting diode (OLED) display panels, quantum dot OLED display panels, mini OLED display panels, and micro OLED display panels.

10. The electronic device according to claim 9, characterized in that, The electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet, laptop, all-in-one computer, access control device, and electronic door lock.

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