Light-emitting device and tower fan

Abstract

The utility model discloses a light-emitting device and a tower fan. The light-emitting device comprises a control module, a driving module and a light-emitting module. The control module is connected with electronic equipment in a wireless mode, the control module is connected with the driving module through a serial communication bus, and the driving module is connected with the light-emitting module; the control module receives a control instruction from the electronic equipment, generates a control signal according to the control instruction, and sends the control signal to the driving module; the driving module controls the state of a light-emitting device in the light-emitting module in a scanning mode according to the control signal. In the embodiment of the invention, the driving module is connected between the control module and the light-emitting module, and the driving module can continuously control the state of the light-emitting device in the light-emitting module in a scanning mode according to the control signal sent by the control module in advance under the condition that the control module is restarted due to a fault; the restart of the control module does not affect the work of the light-emitting module, so that the work of the light-emitting module can be ensured under the condition that the restart is caused by the fault of the control module.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a light emitting device and a tower fan. Background Art

[0002] With the advent of the Internet of Things era, smart home devices are becoming increasingly popular. Many smart home devices are equipped with a light-emitting module for indicating the working status, etc. The light-emitting module is controlled by a control module in the smart home device. If there is a problem with this control module and it needs to be restarted, the light-emitting device will not work. Utility Model Content

[0003] The embodiments of the present application disclose a light emitting device and a tower fan, which are used to ensure that the light emitting module works when a control module has a problem and needs to be restarted.

[0004] In a first aspect, an embodiment of the present application discloses a light-emitting device, including a control module, a driving module and a light-emitting module;

[0005] The control module is connected to the electronic device in a wireless manner, the control module is connected to the driving module via a serial communication bus, and the driving module is connected to the light-emitting module;

[0006] The control module is used to receive a control instruction from the electronic device, generate a control signal according to the control instruction, and send the control signal to the driving module;

[0007] The driving module is used to control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal.

[0008] As a possible implementation manner, the light emitting device further includes a first capacitor;

[0009] One end of the first capacitor is connected to the control module, the driving module and the input power supply respectively, and the other end of the first capacitor is connected to the ground.

[0010] As a possible implementation, the control module includes a control unit, a first resistor and a second resistor;

[0011] The first end of the control unit is connected to one end of the first capacitor, the second end of the control unit is connected to the driving module through the first resistor, and the third end of the control unit is connected to the driving module through the second resistor.

[0012] The control unit is used to receive a control instruction from the electronic device, generate a control signal according to the control instruction, and send the control signal to the driving module.

[0013] As a possible implementation manner, the control module further includes a second capacitor;

[0014] One end of the second capacitor is connected to the first end of the control unit, the other end of the second capacitor is connected to the ground, and the capacitance of the first capacitor is greater than that of the second capacitor.

[0015] As a possible implementation manner, the driving module includes a driving unit and M resistors, the light-emitting module includes M*N light-emitting devices, the M*N light-emitting devices form a light-emitting device array, M is the number of rows of the light-emitting device array, N is the number of columns of the light-emitting device array, and M and N are integers greater than 1;

[0016] The first end and the second end of the driving unit are respectively connected to the control module, the 2+i end of the driving unit is respectively connected to one end of the light emitting device in the i-th column of the light emitting device array, the 3+N end of the driving unit is connected to one end of the first capacitor, and the 3+N+j end of the driving unit is connected to the other end of the light emitting device in the j-th row of the light emitting device array through the j-th resistor among the M resistors, i=1,…,N, j=1,…,M;

[0017] The driving unit is used to control the states of the light emitting devices in the light emitting device array in a scanning manner according to the control signal.

[0018] As a possible implementation manner, the driving module further includes a third capacitor;

[0019] One end of the third capacitor is connected to the 3+N end of the driving unit, and the other end of the third capacitor is connected to the ground. The capacitance of the first capacitor is greater than that of the third capacitor.

[0020] As a possible implementation, the control unit is a micro control unit (Micro Control Unit, MCU) or a system on chip (System On Chip, SOC) chip.

[0021] As a possible implementation, the driving unit is a light-emitting diode (LED) driving chip, an MCU or a SOC chip.

[0022] As a possible implementation manner, the wireless method is a Bluetooth method or a WIFI method.

[0023] In a second aspect, an embodiment of the present application discloses a tower fan, comprising the light-emitting device disclosed in the first aspect.

[0024] In the embodiment of the present application, the resistance value detection device includes a control module, a driving module and a light-emitting module; the control module is connected to the electronic device in a wireless manner, the control module is connected to the driving module through a serial communication bus, and the driving module is connected to the light-emitting module; the control module receives a control instruction from the electronic device, generates a control signal according to the control instruction, and sends the control signal to the driving module; the driving module controls the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal. It can be seen that the driving module is connected between the control module and the light-emitting module. In the case where the control module fails and causes data access out of bounds, stack overflow, memory leakage, watchdog feeding timeout, etc. and restarts, the driving module can continue to control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal previously sent by the control module, and the restart of the control module will not affect the work of the light-emitting module. Therefore, in the case where the control module fails and restarts, the work of the light-emitting module can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural schematic diagram of a light-emitting device disclosed in an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of another light-emitting device disclosed in an embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of another light-emitting device disclosed in an embodiment of the present application;

[0029] Figure 4 It is a structural schematic diagram of a control unit disclosed in an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of another light-emitting device disclosed in an embodiment of the present application;

[0031] Figure 6 It is a structural schematic diagram of a driving module and a light-emitting module disclosed in an embodiment of the present application;

[0032] Figure 7 is a structural schematic diagram of another light-emitting device disclosed in an embodiment of the present application;

[0033] Figure 8 It is a schematic diagram of an IIC timing diagram disclosed in an embodiment of the present application;

[0034] Fig. 9 It is a structural schematic diagram of a tower fan disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0036] The embodiments of the present application disclose a light emitting device and a tower fan, which are used to ensure that the light emitting module works when a problem occurs in the control module and a restart is required.

[0037] In order to better understand the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below.

[0038] With the advent of the Internet of Things era, smart home devices are becoming increasingly popular. Many smart home devices are equipped with light-emitting modules for indicating working status, etc. Existing smart home devices can use MCU or SOC chips to control the light-emitting modules by scanning.

[0039] However, in the case of a fault (bug) in the SOC chip (or MCU), the SOC chip (or MCU) will restart due to data access out of bounds, stack overflow, memory leak, watchdog timeout, etc. During the SOC chip (or MCU) restart process, the light module will not work.

[0040] In order to solve the above problems, the present application designs a light-emitting device, including a control module, a driving module and a light-emitting module; the control module is connected to the electronic device in a wireless manner, the control module is connected to the driving module through a serial communication bus, and the driving module is connected to the light-emitting module; the control module receives a control instruction from the electronic device, generates a control signal according to the control instruction, and sends the control signal to the driving module; the driving module controls the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal. It can be seen that a driving module is connected between the control module and the light-emitting module. In the case where the control module fails and causes data access out of bounds, stack overflow, memory leak, watchdog feeding timeout, etc. and restarts, the driving module can continue to control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal previously sent by the control module, and the restart of the control module will not affect the operation of the light-emitting module. Therefore, in the case where the control module fails and causes a restart, the operation of the light-emitting module can be guaranteed.

[0041] See also Figure 1 , Figure 1 Schematic diagram of a light emitting device disclosed in an embodiment of the present application. Figure 1As shown, the light emitting device may include a control module, a driving module and a light emitting module.

[0042] The control module is connected to the electronic device by wireless means. The wireless means may be WIFI, Bluetooth (Blue Tooth, BT), or other wireless means. Accordingly, the control module may be connected to the electronic device by WIFI, Bluetooth, or other wireless means. The electronic device may be a mobile phone, a portable Android device (PAD), or other device capable of wireless communication.

[0043] The control module is connected to the drive module via a serial communication bus. The control module and the drive module are respectively provided with a serial bus interface, and the control module and the drive module can communicate via the serial communication bus. The communication protocol used by the control module and the drive module can be an Inter Integrated Circuit (IIC) protocol or other communication protocols. The IIC protocol is a synchronous serial communication interface that uses a half-duplex working mode.

[0044] The driving module is connected to the light emitting module, and the connection here is an electrical connection.

[0045] It should be understood that all the following connections without special instructions can be understood as electrical connections.

[0046] When a user needs to control the device where the light emitting device is located, the user can send a control instruction to the device through an electronic device. The control instruction can be a control instruction for controlling the device to work, a control instruction for controlling the rotation speed of the device, a control instruction for controlling the wind speed of the device, or a control instruction for controlling other functions of the device.

[0047] Accordingly, the control module can receive control instructions from the electronic device in a wireless manner, and then generate a control signal according to the control instruction, and send the control signal to the drive module through the serial communication bus. Different control instructions may generate different control signals.

[0048] The driving module can receive a control signal from the control module, and then can control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal.

[0049] The light emitting device may be an LED, a laser diode (LD), or other devices capable of emitting light.

[0050] exist Figure 1In the light-emitting device shown, a driving module is connected between the control module and the light-emitting module. When the control module fails (bug) and causes data access out of bounds, stack overflow, memory leak, watchdog feeding timeout, etc. and restarts, the driving module can continue to control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal previously sent by the control module. The restart of the control module will not affect the operation of the light-emitting module. Therefore, when the control module fails and restarts, the operation of the light-emitting module can be guaranteed.

[0051] In some embodiments, see Figure 2 , Figure 2 is a schematic diagram of the structure of another light emitting device disclosed in the embodiment of the present application. Figure 2 The light emitting device shown is composed of Figure 1 The light emitting device shown is optimized. Figure 2 As shown, the light emitting device may further include a first capacitor C1.

[0052] One end of the first capacitor C1 is connected to the control module, the driving module and the input power supply respectively, and the other end of the first capacitor C1 is connected to the ground.

[0053] Since the input power is unstable, the input power may first pass through the first capacitor C1 and then supply power to the control module and the drive module.

[0054] The first capacitor C1 can store electrical energy so as to provide a stable power supply for the control module and the driving module.

[0055] In addition, the first capacitor C1 can also filter out low-frequency noise in the input power supply, so as to improve the stability of the power supply.

[0056] The first capacitor C1 may be a large capacitor. For example, the capacitance value of the first capacitor C1 may be 470 μF, and the withstand voltage value of the first capacitor C1 may be 6.3V.

[0057] The first capacitor C1 may be disposed at an input terminal of an input power source.

[0058] The input power source may be a direct current power source. For example, the input power source may be a direct current power source with a voltage of 3.3V and a current of 0.8A.

[0059] In some embodiments, see Figure 3 , Figure 3 is a schematic diagram of the structure of another light emitting device disclosed in the embodiment of the present application. Figure 3 The light emitting device shown is composed of Figure 2 The light emitting device shown is optimized. Figure 3 As shown, the control module may include a control unit U1 , a first resistor R1 , and a second resistor R2 .

[0060] A first end of the control unit U1 is connected to one end of the first capacitor C1 , a second end of the control unit U1 is connected to the driving module via a first resistor R1 , and a third end of the control unit U1 is connected to the driving module via a second resistor R2 .

[0061] The control unit U1 can receive control instructions from the electronic device, and then generate a control signal according to the control instruction, and then send the control signal to the driving module through the serial communication bus.

[0062] The control unit U1 may also encode the control signal first, and then send the encoded control signal to the driving module through the serial communication bus.

[0063] The first resistor R1 and the second resistor R2 can suppress interference, thereby protecting the control unit U1 from interference. In addition, the first resistor R1 and the second resistor R2 can also perform current limiting protection, thereby protecting the control unit U1 from burning out due to excessive current. The first resistor R1 and the second resistor R2 can also improve signal quality by suppressing current reflection, thereby enabling the control unit to better send the control signal to the drive module through the serial communication bus.

[0064] The control unit U1 may be an MCU or a SOC chip.

[0065] For example, see Figure 4 , Figure 4 Schematic diagram of the structure of a control unit disclosed in the embodiment of the present application. Figure 4 As shown, the power pin VD33 (i.e., pin 8) of the control unit U1 is the first end of the control unit U1, the general-purpose input / output (GPIO) 4 pin (i.e., pin 6) of the control unit U1 is the second end of the control unit U1, and the GPIO5 pin (i.e., pin 7) of the control unit U1 is the third end of the control unit U1.

[0066] In addition, two ground (Ground, GND) pins (ie, pin 9 and pin 17) of the control unit U1 are connected to the ground terminal respectively.

[0067] It should be understood that Figure 4 This is an exemplary description of the control unit U1 and does not limit the control unit U1.

[0068] like Figure 3 As shown, the control module may further include a second capacitor C2.

[0069] One end of the second capacitor C2 is connected to the first end of the control unit U1 , and the other end of the second capacitor C2 is connected to the ground.

[0070] The second capacitor C2 may be disposed near the power input terminal of the control module, and may filter out high-frequency noise in the input power, so as to provide a stable power supply for the control module.

[0071] The capacitance of the first capacitor C1 may be greater than the capacitance of the second capacitor C2 and the third capacitor C3.

[0072] It can be seen that the second capacitor C2 can be a small capacitor.

[0073] For example, the capacitance value of the second capacitor C2 may be 0.1 μF, and the withstand voltage value of the second capacitor C2 may be 50V.

[0074] After the input power passes through the first capacitor C1 and the second capacitor C2, a stable power supply can be provided to the control unit, thereby ensuring the normal operation of the control unit.

[0075] In some embodiments, see Figure 5 , Figure 5 is a schematic diagram of the structure of another light emitting device disclosed in the embodiment of the present application. Figure 5 The light emitting device shown is composed of Figure 2 The light emitting device shown is optimized. Figure 5 As shown, the driving module may include a driving unit U2 and M resistors, and the light-emitting module may include M*N light-emitting devices, and the M*N light-emitting devices constitute a light-emitting device array, where M is the number of rows of the light-emitting device array, that is, the number of light-emitting devices included in each row of the light-emitting device array, and N is the number of columns of the light-emitting device array, that is, the number of light-emitting devices included in each column of the light-emitting device array, and M and N are integers greater than 1.

[0076] The first end and the second end of the driving unit U2 are respectively connected to the control module, the 2+i end of the driving unit U2 is respectively connected to one end of the light-emitting device in the i-th column in the light-emitting device array, the 3+N end of the driving unit U2 is connected to one end of the first capacitor C1, and the 2+N+j end of the driving unit U2 is connected to the other end of the light-emitting device in the j-th row in the light-emitting device array through the j-th resistor among the M resistors, i=1,…,N, j=1,…,M.

[0077] The light emitting module comprises M*N light emitting devices, and the M*N light emitting devices form an M*N light emitting device array, that is, the light emitting device array is a light emitting device array with M rows and N columns.

[0078] The driving unit U2 can control the states of the light emitting devices in the light emitting device array in a scanning manner according to the control signal from the control module.

[0079] The control signal received by the driving unit U2 from the control module may also be a coded control signal. The driving unit U2 may first decode the coded control signal, and then control the state of the light-emitting devices in the light-emitting device array in a scanning manner according to the decoded control signal.

[0080] The scanning method is a method of controlling the on and off state of the light-emitting devices in the matrix by scanning row by row or column by column. The basic principle is to realize the display of the image by controlling the on and off time and brightness of the light-emitting devices.

[0081] Therefore, the driving unit U2 can control the states of the light emitting devices in the light emitting device array in a row-by-row or column-by-column scanning manner according to the control signal.

[0082] The M resistors can limit the input current and the output current of the driving unit U2 to prevent the driving unit U2 from being burned out due to excessive current.

[0083] The driving unit U2 may be a driving chip, an MCU, or a SOC chip.

[0084] For example, see Figure 6 , Figure 6 Schematic diagram of the structure of a driving module and a light-emitting module disclosed in the embodiment of the present application. Figure 6 As shown, the driving unit U2 may be a chip of model SOP8_AIP650, the driving module may include a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, and the light emitting module may include a first LED D1, a second LED D2, a third LED D3, a fourth LED D4, a fifth LED D5, a sixth LED D6, a seventh LED D7, an eighth LED D8, a ninth LED D9, a tenth LED D10, an eleventh LED D11 and a twelfth LED D12. These twelve LEDs form a 4*3 LED array, that is, M is 4 and N is 3.

[0085] The CLK pin (i.e., pin 2) and the DAT pin (i.e., pin 3) of the driving unit U2 are respectively connected to the control module. Specifically, the CLK pin of the driving unit U2 is connected to the control unit U1 through the first resistor R1, and the DAT pin of the driving unit U2 is connected to the control unit U1 through the second resistor R2. The GND pin (i.e., pin 4) of the driving unit U2 is connected to the ground terminal, the DIG2 pin (i.e., pin 5) of the driving unit U2 is respectively connected to the cathode of the third LED D3, the cathode of the sixth LED D6, the cathode of the ninth LED D9, and the cathode of the twelfth LED D12, the DIG3 pin (i.e., pin 6) of the driving unit U2 is respectively connected to the cathode of the second LED D2, the cathode of the fifth LED D5, the cathode of the eighth LED D8, and the cathode of the eleventh LED D11, the DIG4 pin (i.e., pin 7) of the driving unit U2 is respectively connected to the cathode of the first LED D1, the cathode of the fourth LED D4, the cathode of the seventh LED D7, and the cathode of the tenth LED D10, the VCC pin (i.e., pin 10) of the driving unit U2 is connected to one end of the first capacitor C1, and the C / KI3 pin (i.e., pin 11) of the driving unit U2 is respectively connected to the anode of the tenth LED D10, the anode of the eleventh LED D11, and the cathode of the twelfth LED D10 through the sixth resistor R6. The positive electrode of D12, the D / KI4 pin (i.e., pin 12) of the driving unit U2 is respectively connected to the positive electrode of the seventh LED D7, the positive electrode of the eighth LED D8, and the positive electrode of the ninth LED D9 through the fifth resistor R5, the E / KI5 pin (i.e., pin 13) of the driving unit U2 is respectively connected to the positive electrode of the fourth LED D4, the positive electrode of the fifth LED D5, and the positive electrode of the sixth LED D6 through the fourth resistor R4, and the F / KI6 pin (i.e., pin 14) of the driving unit U2 is respectively connected to the positive electrode of the first LED D1, the positive electrode of the second LED D2, and the positive electrode of the third LED D3 through the third resistor R3.

[0086] It should be understood that Figure 6 This is an exemplary description of the driving module and the light-emitting module, and does not limit the driving module and the light-emitting module.

[0087] like Figure 5 As shown, the driving module may further include a third capacitor C3.

[0088] One end of the third capacitor C3 is connected to the 3+N end of the driving unit U2, and the other end of the third capacitor C3 is connected to the ground.

[0089] The third capacitor C3 may be arranged near the power input terminal of the driving module, and may filter out high-frequency noise in the input power, so as to provide a stable power supply for the driving module.

[0090] The capacitance of the first capacitor C1 may be greater than the capacitance of the third capacitor C3.

[0091] It can be seen that the third capacitor C3 can be a small capacitor. The second capacitor C2 and the third capacitor C3 can be the same or different.

[0092] For example, the capacitance value of the third capacitor C3 may be 0.1 μF, and the withstand voltage value of the third capacitor C3 may be 50V.

[0093] After the input power passes through the first capacitor C1 and the third capacitor C3, a stable power supply can be provided for the driving module, thereby ensuring the normal operation of the driving unit.

[0094] See also Figure 7 , Figure 7 is a schematic diagram of the structure of another light emitting device disclosed in the embodiment of the present application. Figure 7 The light emitting device shown is composed of Figure 3 and Figure 6 Optimized. Figure 7 As shown, the light emitting device may further include a connector J, wherein a first end (ie, pin 1) of the connector J is connected to one end of the first capacitor C1, and a second end (ie, pin 2) of the connector J is connected to the other end of the first capacitor C1 or the ground.

[0095] The connector J is used to provide a connection end. The power supply pin (ie, the first end) and the ground pin (ie, the second end) of the connector J form a power supply path to supply power to the control unit U1 and the drive unit U2.

[0096] See also Figure 8 , Figure 8 Schematic diagram of an IIC timing diagram disclosed in an embodiment of the present application. Figure 8 As shown, the driving unit U2 can receive a clock signal through the CLK pin, and the driving unit U2 can receive a control signal through the DAT pin.

[0097] like Figure 8 As shown in the figure, when the control signal is input, the circuit latches the control signal at the rising edge of the clock (Clock, CLK) signal. Therefore, when the CLK signal is high, the control signal on the DAT pin must remain unchanged. The control signal on the DAT pin can only be changed when the CLK signal on the CLK pin is low, and the control signal cannot be changed on the falling edge of the CLK signal. The start condition for the control signal input is that the CLK signal is high and the DAT pin changes from high to low. The end condition for the control signal input is that the CLK signal is high and the DAT pin changes from low to high.

[0098] The control signal may include an Acknowledge (ACK) signal. During the transmission of the control signal, an ACK signal is generated at the ninth clock of the CLK signal. The ACK signal can pull the DAT pin to a low level. Whether writing a control signal or writing and reading data, the ninth bit after an 8-bit byte is the ACK signal output.

[0099] The control signal may be transmitted in at least 8-bit format. Figure 8 As shown, the control signal can be transmitted in 16-bit format. When transmitting the control signal, the high bit of the control signal is transmitted first, and then the low bit of the control signal is transmitted. The control signal is latched on the rising edge of the CLK signal. The DAT pin cannot change when the CLK signal is at a high level, nor can it change on the falling edge of the CLK signal, but changes when the CLK signal is at a low level.

[0100] Therefore, if the control unit U1 restarts during the sending process, the sent control signal will be suddenly cut off. The driver chip will not execute the wrong control signal received, and the LED array will not be in an abnormal state of being completely off for tens to hundreds of milliseconds. Therefore, the operation of the light-emitting module can be guaranteed.

[0101] In some embodiments, the above-mentioned light emitting device can be applied to a tower fan.

[0102] See also Fig. 9 , Fig. 9 Schematic diagram of the structure of a tower fan disclosed in the embodiment of the present application. Fig. 9 As shown, the tower fan may include a light emitting device.

[0103] For a detailed description of the light emitting device, reference may be made to the above related description, which will not be repeated here.

[0104] It should be understood that the above-mentioned light emitting device can also be applied to other electronic devices with indicator lights.

[0105] It should be understood that in different embodiments, the same or corresponding information may be referenced to each other.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light emitting device, characterized in that: It includes a control module, a driving module and a light-emitting module; The control module is connected to the electronic device in a wireless manner, the control module is connected to the driving module via a serial communication bus, and the driving module is connected to the light-emitting module; The control module is used to receive a control instruction from the electronic device, generate a control signal according to the control instruction, and send the control signal to the driving module; The driving module is used to control the state of the light-emitting device in the light-emitting module in a scanning manner according to the control signal.

2. The light emitting device according to claim 1, characterized in that: The light emitting device further comprises a first capacitor; One end of the first capacitor is connected to the control module, the driving module and the input power supply respectively, and the other end of the first capacitor is connected to the ground.

3. The light emitting device according to claim 2, characterized in that: The control module includes a control unit, a first resistor and a second resistor; The first end of the control unit is connected to one end of the first capacitor, the second end of the control unit is connected to the driving module through the first resistor, and the third end of the control unit is connected to the driving module through the second resistor. The control unit is used to receive a control instruction from the electronic device, generate a control signal according to the control instruction, and send the control signal to the driving module.

4. The light emitting device according to claim 3, characterized in that: The control module also includes a second capacitor; One end of the second capacitor is connected to the first end of the control unit, the other end of the second capacitor is connected to the ground, and the capacitance of the first capacitor is greater than that of the second capacitor.

5. The light emitting device according to claim 2, characterized in that: The driving module includes a driving unit and M resistors, the light-emitting module includes M*N light-emitting devices, the M*N light-emitting devices form a light-emitting device array, M is the number of rows of the light-emitting device array, N is the number of columns of the light-emitting device array, and M and N are integers greater than 1; The first end and the second end of the driving unit are respectively connected to the control module, the 2+i end of the driving unit is respectively connected to one end of the light emitting device in the i-th column of the light emitting device array, the 3+N end of the driving unit is connected to one end of the first capacitor, and the 3+N+j end of the driving unit is connected to the other end of the light emitting device in the j-th row of the light emitting device array through the j-th resistor among the M resistors, i=1,…,N, j=1,…,M; The driving unit is used to control the states of the light emitting devices in the light emitting device array in a scanning manner according to the control signal.

6. The light emitting device according to claim 5, characterized in that: The driving module further includes a third capacitor; One end of the third capacitor is connected to the 3+N end of the driving unit, and the other end of the third capacitor is connected to the ground. The capacitance of the first capacitor is greater than that of the third capacitor.

7. The light emitting device according to claim 3, characterized in that: The control unit is a micro control unit MCU or a system on chip SOC chip.

8. The light emitting device according to claim 5, characterized in that: The driving unit is a light emitting diode (LED) driving chip, an MCU or a SOC chip.

9. The light emitting device according to claim 1, characterized in that: The wireless method is Bluetooth or WIFI.

10. A tower fan, characterized in that: Comprising the light emitting device as described in any one of claims 1 to 9.

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