Charging indication control circuit and method and charging device

Abstract

The invention relates to the technical field of charging indication, in particular to a charging indication control circuit and method and a charging device. The charging indication control circuit comprises a main control chip, a first fast charging protocol chip, a first voltage reduction module, a first interface module, a first current detection module and a display module, the main control chip is connected with the first fast charging protocol chip and the display module, and the first voltage reduction module is connected with the first fast charging protocol chip and the first interface module. The first current detection module is connected with the first fast charging protocol chip, the first current detection module is used for detecting first charging current output by the first interface module and transmitting the first charging current to the first fast charging protocol chip, and the first fast charging protocol chip converts the first charging current into a first bus protocol signal and sends the first bus protocol signal to the first interface module; and the main control chip controls the display module to display different graphs according to the first bus protocol signal so as to correspondingly indicate different charging states. The charging state can be indicated, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging indication, and in particular to a charging indication control circuit, method and charging device. Background Art

[0002] Charging devices such as chargers, mobile power supplies, energy storage power supplies, docking stations, etc. can charge electronic devices. Charging devices are usually provided with a charging indication control circuit to display the working status of the charging device.

[0003] In some existing fast-charging charging devices, the charging indication control circuit generally uses a single indicator light, and the power supply of the indicator light is taken from the output capacitor energy storage circuit located at the voltage output end of the circuit. However, the indicator light in the above charging indication control circuit is relatively simple, which can only indicate whether the charging device has power output, but cannot indicate the charging status when charging output is in progress, resulting in a poor user experience. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a charging indication control circuit, method and charging device to solve the problem that the charging indication control circuit of the charging device in the prior art cannot indicate the charging status when charging output is in progress, resulting in poor user experience.

[0005] The present invention discloses a charging indication control circuit, including a main control chip, a first fast charging protocol chip, a first step-down module, a first interface module, a first current detection module and a display module. The main control chip is connected to the first fast charging protocol chip and the display module, the first step-down module is connected to the first fast charging protocol chip and the first interface module, the first fast charging protocol chip controls the first step-down module to step down the voltage and then outputs a first charging current through the first interface module, the first current detection module is connected to the first fast charging protocol chip, the first current detection module is used to detect the first charging current output by the first interface module, and transmit the first charging current to the first fast charging protocol chip, the first fast charging protocol chip converts the first charging current into a first bus protocol signal, and the main control chip controls the display module to display different graphics according to the first bus protocol signal to indicate different charging states.

[0006] Optionally, the charging indication control circuit also includes a second fast charging protocol chip, a second step-down module, a second current detection module and a second interface module. The second fast charging protocol chip is connected to the main control chip, and the second step-down module is connected to the second fast charging protocol chip and the interface module. The second fast charging protocol chip controls the second step-down module to step down the voltage and then outputs a second charging current through the second interface module. The second current detection module is used to detect the second charging current output by the second interface module and transmit the second charging current to the second fast charging protocol chip. The second fast charging protocol chip converts the second charging current into a second bus protocol signal. The main control chip controls the display module to display different graphics according to the first bus protocol signal and the second bus protocol signal.

[0007] Optionally, the display module includes a first display area, a second display area and a third display area, and the first display area, the second display area and the third display area are arranged and combined to display different graphics.

[0008] Optionally, the first display area is provided with a first sub-display area, the second display area is provided with two second sub-display areas, and the third display area is provided with four third sub-display areas. The first display area, the third display area and the second display area are arranged in sequence along the first direction, and two second sub-display areas are arranged along the second direction. In the second direction, the first sub-display area is located between two second sub-display areas, and the four third sub-display areas are arranged along the second direction. In the second direction, every two third sub-display areas form a group and are arranged on both sides of a first sub-display area. The two third sub-display areas in each group are arranged on both sides of a second sub-display area, and the first direction and the second direction are two directions perpendicular to each other.

[0009] Optionally, the first fast charging protocol chip includes a first voltage output pin, the second fast charging protocol chip includes a second voltage output pin, the first sub-display area, the second sub-display area and the third sub-display area are each provided with at least one LED lamp, the positive pole of the LED lamp in the first sub-display area is connected to the first transmission pin of the main control chip, and the negative pole is grounded, the positive poles of the LED lamp in the second sub-display area and the LED lamp in the third sub-display area are both connected to the first voltage output pin and the second voltage output pin, the negative pole of the LED lamp in the second sub-display area is connected to the second transmission pin of the main control chip, and the negative pole of the LED lamp in the third sub-display area is connected to the third transmission pin of the main control chip.

[0010] The present invention also discloses a charging indication control method, which is characterized in that it is applied to the charging indication control circuit as described above, and the charging indication control method comprises:

[0011] Obtaining a first charging current outputted;

[0012] Converting the first charging current into a first bus protocol signal;

[0013] Entering the first charging indication mode, different graphics are displayed according to the first bus protocol signal to indicate different charging states.

[0014] Optionally, the charging indication control method further includes:

[0015] Obtaining a second charging current outputted;

[0016] converting the second charging current into a second bus protocol signal;

[0017] Entering the second charging indication mode, different graphics are displayed according to the first bus protocol signal and the second bus protocol signal to indicate different charging states.

[0018] Optionally, the step of entering the second charging indication mode and controlling the display of different graphics according to the first bus protocol signal and the second bus protocol signal includes:

[0019] Determining whether the first bus protocol signal and the second bus protocol signal are both bus protocol signals that satisfy a full condition;

[0020] If yes, controlling the display of a second graphic to indicate that it is in a full state;

[0021] If not, the control displays the first graphic to indicate that it is in a charging state.

[0022] Optionally, before obtaining the output first charging current and obtaining the output second charging current, the method further includes:

[0023] Determine whether the first charging current and the second charging current are output;

[0024] If only the first charging current is output, only the output first charging current is obtained, and the first charging indication mode is entered;

[0025] If only the second charging current is output, only the output second charging current is obtained, the second charging current is converted into a second bus protocol signal, and a third charging indication mode is entered, and different graphics are controlled to be displayed according to the second bus protocol signal to indicate different charging states;

[0026] If both the first charging current and the second charging current are output, the output first charging current and the second charging current are obtained, and a second charging indication mode is entered;

[0027] If neither the first charging current nor the second charging current is output, the fourth charging indication mode is entered, and the third graphic is controlled to be displayed to indicate the state to be charged.

[0028] Optionally, the first bus protocol signal includes a first sub-signal and a second sub-signal, and the step of entering the first charging indication mode and controlling the display of different graphics according to the first bus protocol signal includes:

[0029] When the first charging current exceeds the first preset current, converting the first charging current into a first sub-signal, and controlling the display of a first graphic based on the first sub-signal to indicate that the device is in a charging state;

[0030] When the first charging current exceeds the second preset current and is less than the first preset current, the first charging current is converted into a second sub-signal, and the display of a second graphic is controlled based on the second sub-signal to indicate that the battery is in a full charge state.

[0031] The present invention also discloses a charging device, including an AC / DC conversion module and a charging indication control circuit as described above, wherein the voltage input end of the AC / DC conversion module is connected to an external power supply, and the voltage output end is connected to the power input end of the first fast charging protocol chip of the charging indication control circuit.

[0032] Compared with the prior art, the charging indication control circuit provided by the embodiment of the present invention has the following beneficial effects: the charging indication control circuit of the present invention sets a first fast charging protocol chip to control the first step-down module to achieve step-down and then output a first charging current through the first interface module, detects and obtains the first charging current output by the first interface module through the first current detection module, and uses the first fast charging protocol chip for fast charging to convert the first charging current into a first bus protocol signal. The main control chip controls the display module to display different graphics according to the first bus protocol signal, thereby indicating different charging states of the charging device and improving the user experience of the charging device. In addition, since the first fast charging protocol chip itself converts the first charging current into the corresponding bus protocol signal, the main control chip only needs to judge the bus protocol signal, and the performance requirements for the main control chip are relatively low, and the selection is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0034] Figure 1 It is a schematic diagram of the module structure of an embodiment of a charging indication control circuit provided by an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the module structure of another embodiment of the charging indication control circuit provided by an embodiment of the present invention;

[0036] Figure 3 It is a partial circuit diagram of the connection between the first fast charging protocol chip, the first step-down module and the first interface module provided by an embodiment of the present invention;

[0037] Figure 4 It is a partial circuit diagram of the connection of the second fast charging protocol chip, the second step-down module, the second interface module and the third interface module provided by an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of a portion of a circuit connecting a main control chip and a display module provided by an embodiment of the present invention;

[0039] Figure 6 is a schematic diagram of the structure of a display module provided by an embodiment of the present invention;

[0040] Figure 7 is a schematic diagram of a first effect displayed by a display module provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic diagram of a second effect displayed by the display module provided in an embodiment of the present invention;

[0042] Fig. 9 is a schematic diagram of a third effect displayed by the display module provided in an embodiment of the present invention;

[0043] Fig.10 It is a flow chart of an embodiment of a charging indication control method provided by an embodiment of the present invention;

[0044] Fig.11 is a flow chart of another embodiment of the charging indication control method provided by an embodiment of the present invention;

[0045] Fig.12 is a flow chart of a second charging indication mode provided by an embodiment of the present invention;

[0046] Fig.13 It is a flow chart of another embodiment of the charging indication control method provided by an embodiment of the present invention.

[0047] The reference numerals in the figures are:

[0048] 110 (U1), main control chip; 120 (U2), first fast charging protocol chip; 130, first buck module; 140, first interface module; 150, first current detection module; 160, display module; 161, first display area; 161a, first sub-display area; 162, second display area; 162a, second sub-display area; 163, third display area; 163a, third sub-display area; 170 (U3), second fast charging protocol chip; 180, second buck module; 190, second current detection module; 210, second interface module; 220, third interface module; 230, third current detection module; 240, AC / DC conversion module;

[0049] R1, first resistor; R2, second resistor; R3, third resistor; Q1, first NMOS tube; Q2, second NMOS tube; L1, first energy storage inductor; L2, second energy storage inductor; C1, first energy storage capacitor; C2, second energy storage capacitor; J1, first type-c interface; J2, second type-c interface; J3, USB-A interface. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0051] like Figure 1 As shown, the present invention provides a preferred embodiment of a charging indication control circuit.

[0052] like Figure 1 The charging indication control circuit includes a main control chip 110 (U1), a first fast charging protocol chip 120 (U2), a first buck module 130, a first interface module 140, a first current detection module 150 and a display module 160. The main control chip 110 (U1) is connected to the first fast charging protocol chip 120 (U2) and the display module 160. The first buck module 130 is connected to the first fast charging protocol chip 120 (U2) and the first interface module 140. The first fast charging protocol chip 120 (U2) controls the first buck module 130 to buck and then passes through the first The interface module 140 outputs a first charging current, the first current detection module 150 is connected to the first fast charging protocol chip 120 (U2), the first current detection module 150 is used to detect the first charging current output by the first interface module 140, and transmit the first charging current to the first fast charging protocol chip 120 (U2), the first fast charging protocol chip 120 (U2) converts the first charging current into a first bus protocol signal, and the main control chip 110 (U1) controls the display module 160 to display different graphics according to the first bus protocol signal to indicate different charging states.

[0053] The charging indication control circuit of the embodiment of the present invention sets a first fast charging protocol chip 120 (U2) to control the first step-down module 130 to achieve step-down and then output a first charging current through the first interface module 140, and detects and obtains the first charging current output by the first interface module 140 through the first current detection module 150, and uses the first fast charging protocol chip 120 (U2) for fast charging to convert the first charging current into a first bus protocol signal, and the main control chip 110 (U1) controls the display module 160 to display different graphics according to the first bus protocol signal, so as to indicate different charging states of the charging device and improve the user experience of the charging device. In addition, since the first fast charging protocol chip 120 (U2) itself converts the first charging current into the corresponding bus protocol signal, the main control chip 110 (U1) only needs to judge the bus protocol signal, and the performance requirements for the main control chip 110 (U1) are relatively low, and the selection is more flexible.

[0054] The first fast charging protocol chip 120 (U2) integrates a rectifier and buck circuit, a switch tube circuit, etc., and can specifically be a fast charging protocol chip that supports the PD protocol. The first fast charging protocol chip 120 (U2) can use a SW3516 model chip.

[0055] In an optional embodiment of the present application, refer to Figure 1 and Figure 3 , Figure 5 The first current detection module 150 includes a first resistor R1, the first step-down module 130 includes a first NMOS tube Q1, a second NMOS tube Q2, a first energy storage inductor L1 and a first energy storage capacitor C1, the first end of the first energy storage inductor L1 is connected to the switch pin SW of the first fast charging protocol chip 120 (U2), the second end is connected to one end of the first resistor R1 and the positive electrode of the first energy storage capacitor C1, the other end of the first resistor R1 is connected to the first interface module 140, the negative electrode of the first energy storage capacitor C1 is grounded, the gate of the first NMOS tube Q1 and the second NMOS tube Q2 are connected to the first interface module 140, and the gate of the first NMOS tube Q1 and the second NMOS tube Q2 are connected to the first interface module 140. The driving end of the OS tube Q2 is respectively connected to the two gate driving pins of the first fast charging protocol chip 120 (U2), which are the HGATE pin and the LGATE pin respectively. The source of the first NMOS tube Q1 and the drain of the second NMOS tube Q2 are both connected to the first end of the first energy storage inductor L1. The drain of the first NMOS tube Q1 is connected to the input voltage, and the source of the second NMOS tube Q2 is grounded. The two ends of the first resistor R1 are also respectively connected to the first current sampling pin CSPC and the second current sampling pin CSNC of the first fast charging protocol chip 120 (U2).

[0056] The first fast charging protocol chip 120 (U2) integrates a rectifier and step-down circuit, a switch tube circuit, etc., controls the first NMOS tube Q1 and the second NMOS tube Q2, and cooperates with the first energy storage inductor L1 and the second energy storage capacitor C2 to convert the input voltage into a suitable charging voltage, which is output through the first interface module 140 to charge the connected electronic device.

[0057] Among them, the first resistor R1 is used as the first current detection module 150, and the first fast charging protocol chip 120 (U2) obtains the first charging current output by the first interface module 140 by differential detection through the first resistor R1, and the circuit structure is simple.

[0058] In an optional embodiment of the present application, reference Figure 1 and Figure 3 , Figure 5 The first interface module 140 includes a first type-c interface J1, and the first type-c interface J1 connects the first resistor R1 and the first fast charging protocol chip 120 (U2). The first fast charging protocol chip 120 (U2) performs protocol communication with the connected electronic device through the first type-c interface J1.

[0059] By setting the first type-c interface J1, the user can connect an electronic device having an interface matching the first type-c interface J1 to the first type-c interface J1 to charge the electronic device, and the charging indication control circuit can display its charging status.

[0060] In an optional embodiment of the present application, refer to Figure 2 The charging indication control circuit also includes a second fast charging protocol chip 170 (U3), a second step-down module 180, a second current detection module 190 and a second interface module 210. The second fast charging protocol chip 170 (U3) is connected to the main control chip 110 (U1). The second step-down module 180 is connected to the second fast charging protocol chip 170 (U3) and the interface module. The second fast charging protocol chip 170 (U3) controls the second step-down module 180 to step down and then outputs a second charging current through the second interface module 210. The second current detection module 190 is used to detect the second charging current output by the second interface module 210 and transmit the second charging current to the second fast charging protocol chip 170 (U3). The second fast charging protocol chip 170 (U3) converts the second charging current into a second bus protocol signal. The main control chip 110 (U1) controls the display module 160 to display different graphics according to the first bus protocol signal and the second bus protocol signal.

[0061] By setting the second fast charging protocol chip 170 (U3), the second step-down module 180 can be controlled to convert the input voltage into a suitable charging voltage, and output the second charging current through the second interface module 210. The user can select the first interface module 140 or the second interface module 210, or charge different electronic devices through the first interface module 140 and the second interface module 210 at the same time.

[0062] The main control chip 110 (U1) controls the display module 160 to display different graphics according to the first bus protocol signal and the second bus protocol signal, which can effectively avoid the problem of confusing display of different charging states of different electronic devices connected to the first interface module 140 and the second interface module 210.

[0063] In an optional embodiment of the present application, refer to Figure 2 and Figure 4 , Figure 5 , the second current detection module 190 includes a second resistor R2, the second step-down module 180 includes a second energy storage inductor L2 and a second energy storage capacitor C2, the first end of the second energy storage inductor L2 is connected to the switch pin SW of the second fast charging protocol chip 170 (U3), the second end is connected to one end of the second resistor R2 and the positive electrode of the second energy storage capacitor C2, the other end of the second resistor R2 is connected to the second interface module 210, and the negative electrode of the second energy storage capacitor C2 is grounded. The two ends of the second resistor R2 are also connected to the first current sampling pin and the second current sampling pin of the second charging protocol chip respectively.

[0064] The second fast charging protocol chip 170 (U3) obtains the charging current output by the second interface module 210 by differential detection through the second resistor R2. The charging current output by the second interface module 210 is converted into a corresponding second bus protocol signal and transmitted to the main control chip 110 (U1). The main control chip 110 (U1) controls the display module 160 to display different graphics according to the second bus protocol signal to indicate different charging states.

[0065] The second fast charge protocol chip 170 (U3) integrates a rectifier and buck circuit, a switch tube circuit, etc., and can specifically be a fast charge protocol chip that supports the PD protocol and the QC protocol. The second fast charge protocol chip 170 (U3) can use a SW3537 chip.

[0066] The second resistor R2 is used as the second current detection module 190, and the circuit structure is simple.

[0067] The second interface module 210 includes a second type-c interface J2, and the second type-c interface J2 is connected to one end of the second resistor R2 and the second fast charging protocol chip 170 (U3).

[0068] Further, refer to Figure 2 , Figure 4 and Figure 5 The charging indication control circuit also includes a third interface module 220 and a third current detection module 230. The third interface module 220 is connected to the second step-down module 180. The second fast charging protocol chip 170 (U3) also controls the second step-down module 180 to output a third charging current through the third interface module 220 after stepping down the voltage. The third current detection module 230 is used to detect the third charging current output by the third interface module 220 and transmit the third charging current to the second fast charging protocol chip 170 (U3). The second fast charging protocol chip 170 (U3) converts the third charging current into a third bus protocol signal. The main control chip 110 (U1) controls the display module 160 to display different graphics according to the first bus protocol signal, the second bus protocol signal and the third bus protocol signal.

[0069] Through the third interface module 220, the second fast charge protocol chip 170 (U3) can also control the second step-down module 180 to convert the input voltage into a suitable charging voltage, and output the third charging current through the third interface module 220. The user can select one or more of the first interface module 140, the second interface module 210 and the third interface module 220 to charge different electronic devices, which is convenient to use. The main control chip 110 (U1) can control the display module 160 to display different graphics according to the first bus protocol signal, the second bus protocol signal and the third bus protocol signal to avoid display confusion.

[0070] In an optional embodiment of the present application, the third current detection module 230 includes a third resistor R3, the third interface module 220 includes a USB-A interface J3, one end of the third resistor R3 is connected to the second end of the second energy storage inductor L2, and the other end is connected to the USB-A interface J3, and the two ends of the third resistor R3 are also respectively connected to the third current sampling pin and the fourth current sampling pin of the second fast charging protocol chip 170 (U3), and the USB-A interface J3 is connected to the second fast charging protocol chip 170 (U3).

[0071] The second fast charge protocol chip 170 (U3) uses a differential detection method to obtain the third charging current output by the USB-A interface J3 through the third resistor R3. The circuit structure of the third current detection module 230 is simple.

[0072] refer to Figure 6 , an embodiment of the present invention provides a preferred embodiment of a display module 160.

[0073] like Figure 6As shown, the display module 160 includes a first display area 161, a second display area 162 and a third display area 163. The first display area 161, the second display area 162 and the third display area 163 are arranged and displayed in combination to display different graphics.

[0074] The main control chip 110 (U1) can control the arrangement and combination of the first display area 161, the second display area 162 and the third display area 163 according to the first bus protocol signal and the second bus protocol signal to display different graphics corresponding to different charging states. The user judges the charging state through different graphic displays, which provides a better user experience.

[0075] The arrangement and combination of the first display area 161, the second display area 162 and the third display area 163 can display different emoticon graphics, text graphics, geometric graphics, etc. In this embodiment, emoticon graphics are preferred, which have better display interest.

[0076] Further, the first display area 161 is provided with a first sub-display area 161a, the second display area 162 is provided with two second sub-display areas 162a, and the third display area 163 is provided with four third sub-display areas 163a. ​​The first display area 161, the third display area 163 and the second display area 162 are arranged in sequence along the first direction, the two second sub-display areas 162a are arranged along the second direction, and in the second direction, the first sub-display area 161a is located between the two second sub-display areas 162a, the four third sub-display areas 163a are arranged along the second direction, and in the second direction, every two third sub-display areas 163a are a group arranged on both sides of a first sub-display area 161a, and the two third sub-display areas 163a in each group are arranged on both sides of a second sub-display area 162a, and the first direction and the second direction are two directions perpendicular to each other.

[0077] The first direction is Figure 6 The Y-axis direction in the second direction is Figure 6 The X-axis direction.

[0078] Through the above-mentioned setting method, the first display area 161, the second display area 162 and the third display area 163 are arranged and combined to display different emoticon graphics, rendering different usage atmospheres, improving the flexibility and diversity of the charging indication display, increasing the fun of the charging indication, and improving the user experience. If the first display area 161 and the second display area 162 are displayed, and the third display area 163 is off, the first display effect is presented as a whole. The display effect diagram is shown in FIG. Figure 7As shown, it can be used to indicate the charging state; the first display area 161, the second display area 162 and the third display area 163 are all displayed, and the whole presents the second display effect. The display effect schematic diagram is shown in Figure 8 As shown, it can be used to indicate the charging status; the second display area 162 and the third display area 163 are displayed, the first display area 161 is off, and the whole presents a third display effect. The display effect schematic diagram is shown in Figure 9, which can be used to indicate the full state.

[0079] refer to Figures 3 to 6 The first fast charging protocol chip 120 (U2) includes a first voltage output pin VDRV1, the second fast charging protocol chip 170 (U3) includes a second voltage output pin VDRV2, the first sub-display area 161a, the second sub-display area 162a and the third sub-display area 163a are each provided with at least one LED lamp, the positive pole of the LED lamp in the first sub-display area 161a is connected to the first transmission pin of the main control chip 110 (U1), and the negative pole is grounded, the positive poles of the LED lamps in the second sub-display area 162a and the third sub-display area 163a are both connected to the first voltage output pin and the second voltage output pin, the negative pole of the LED lamp in the second sub-display area 162a is connected to the second transmission pin of the main control chip 110 (U1), and the negative pole of the LED lamp in the third sub-display area 163a is connected to the third transmission pin of the main control chip 110 (U1).

[0080] By controlling the on and off of the LED lights in each sub-display area, the display and extinguishing of each sub-display area are realized. The LED lights are small in size, low in cost, and can convert more electrical energy into light energy, reducing energy waste.

[0081] Among them, the LED lights in the second sub-display area 162a and the third sub-display area 163a are powered by the voltage output pins of the first fast charging protocol chip 120 (U2) and the second fast charging protocol chip 170 (U3), and the negative poles of the LED lights in the second sub-display area 162a and the third sub-display area 163a are connected to the main control chip 110 (U1). The main control chip 110 (U1) outputs a low level to drive the LED lights to turn on and off. There is no need to set up other power supply circuits to power the LED lights, which can simplify the circuit structure and reduce costs to a certain extent. Specifically, when the first transmission pin of the main control chip 110 (U1) outputs a high level, the LED light of the first sub-display area 161a turns on, and when the first transmission pin of the main control chip 110 (U1) outputs a low level, the LED light of the first sub-display area 161a turns off; when the second transmission pin and the third transmission pin of the main control chip 110 (U1) output a high level, the LED lights of the second sub-display area 162a and the third sub-display area 163a turns off, and when the second transmission pin and the third transmission pin of the main control chip 110 (U1) output a low level, the LED lights of the second sub-display area 162a and the third sub-display area 163a turns on.

[0082] The number of LED lights provided in the first sub-display area 161a, the second sub-display area 162a and the third sub-display area 163a can be one, two, three or more, and the user can set it as needed. In this embodiment, it is preferred to provide one LED light in each sub-display area, which is low in cost. Figure 5 As shown, the LED lamp of the first sub-display area 161a is LED1, the LED lamps of the two second sub-display areas 162a are LED2 and LED3, and the LED lamps of the four third sub-display areas 163a are LED4, LED5, LED6, and LED7. A light shielding cover can be used, and light-transmitting holes are opened on the light shielding cover at positions corresponding to the respective LED lamps, so as to form the first sub-display area 161a, the second sub-display area 162a, and the third sub-display area 163a, and three light-transmitting holes can be opened at the positions of the LED lamps corresponding to the first sub-display area 161a along the first direction.

[0083] refer to Figure 2 , an embodiment of the present invention also provides a preferred embodiment of a charging device.

[0084] like Figure 2 As shown, the charging device includes an AC-DC conversion module 240 and a charging indication control circuit as described above, the voltage input end of the AC-DC conversion module 240 is connected to an external power supply, and the voltage output end is connected to the power input end of the first fast charging protocol chip 120 (U2) of the charging indication control circuit.

[0085] By setting up an AC / DC conversion module 240, the AC voltage connected to the external power supply is converted into a suitable DC voltage, and the DC voltage is supplied to the first fast charging protocol chip 120 (U2). After the first fast charging protocol chip 120 (U2) cooperates with the first step-down module 130 to step down the voltage, the external electronic device is charged through the first interface module 140. The charging device has the same technical effect as the above-mentioned charging indication control circuit, which will not be described in detail here.

[0086] The voltage output terminal of the AC / DC conversion module 240 is also connected to the power input terminal of the second fast charging protocol chip 170 (U3) of the charging indication control circuit.

[0087] The AC-DC conversion module 240 is used to convert the AC voltage input by the external power supply into a suitable DC voltage, which can be implemented by a conventional AD-DC conversion circuit and will not be described in detail here.

[0088] The charging device can be a charger, a mobile power source, an energy storage power source, a rechargeable docking station, or other device that can charge an electronic device.

[0089] refer to Fig.10 The present invention also provides a preferred embodiment of a charging indication control method. The charging indication control method is applied to the charging indication control circuit as described above.

[0090] As shown in the figure, the charging indication control method includes:

[0091] S110, obtaining a first output charging current;

[0092] S120, converting the first charging current into a first bus protocol signal;

[0093] S130, entering a first charging indication mode, and controlling the display of different graphics according to the first bus protocol signal to indicate different charging states.

[0094] By acquiring the output first charging current and controlling the display of different graphics according to the difference in the first bus protocol signal converted from the first charging current, different charging states are indicated, thereby realizing the indication of different charging states of the charging device and improving the user experience of the charging device.

[0095] During the charging process, the output first charging current is different when charging and fully charged, and the corresponding converted first bus protocol signal is different. Different graphics are displayed according to different controls of the first bus protocol signal, correspondingly indicating different charging states, with high charging indication accuracy.

[0096] Specifically, the first current detection module 150 of the charging indication control circuit obtains the first charging current output by the first interface module 140, the first fast charging protocol chip 120 (U2) converts the first charging current into a first bus protocol signal, the main control chip 110 (U1) controls the entry into the first charging indication mode, and controls the display module 160 to display different graphics according to the first bus protocol signal to indicate different charging states. By using the first fast charging protocol chip 120 (U2) for fast charging to convert the first charging current into a first bus protocol signal, the main control chip 110 (U1) only needs to judge the bus protocol signal and control the display module 160 to display different graphics to indicate different charging states of the charging device, thereby improving the user experience of the charging device. In addition, since the first fast charging protocol chip 120 (U2) converts the first charging current into a corresponding bus protocol signal, the performance requirements for the main control chip 110 (U1) are relatively low, and the selection is more flexible.

[0097] In an optional embodiment of the present application, the first bus protocol signal includes a first sub-signal and a second sub-signal, and step S130 enters a first charging indication mode, and the step of controlling the display of different graphics according to the first bus protocol signal includes:

[0098] When the first charging current exceeds the first preset current, the first charging current is converted into a first sub-signal, and a first graphic is controlled to be displayed based on the first sub-signal to indicate that the device is in a charging state;

[0099] When the first charging current exceeds the second preset current and is less than the first preset current, the first charging current is converted into a second sub-signal, and the second graphic is controlled to be displayed based on the second sub-signal to indicate that the battery is in a full charge state.

[0100] In a specific implementation scenario, the first preset current is set to a value between 200-250mA, and the second preset current is set to a value between 10-200mA and lower than the first preset current. For example, the first preset current is set to 220mA, and the second preset current is set to 50mA. When the first charging current exceeds 220mA, indicating that charging is in progress, the first charging current is converted into a first sub-signal, and the first graphic is controlled to be displayed based on the first sub-signal to indicate that the battery is in a charging state; when the first charging current exceeds 50mA and is less than 220mA, indicating that the battery is fully charged, the first charging current is converted into a second sub-signal, and the second graphic is controlled to be displayed based on the second sub-signal to indicate that the battery is fully charged.

[0101] By controlling the display of different graphics according to the different first charging currents and corresponding to the different bus protocol signals, different charging states are indicated, and the indication is accurate.

[0102] Entering the third charging indication mode, the steps of controlling the display of different graphics according to the second bus protocol signal to indicate different charging states may be the same as those in the first charging indication mode, and will not be repeated here.

[0103] When the third interface module 220 is provided, and only the third interface module 220 is connected to the electronic device, the third charging current is obtained, and the second fast charging protocol chip 170 (U3) converts the third charging current into the third bus protocol chip, and enters the fifth charging indication mode. Different graphics are displayed according to the third bus protocol signal to indicate different charging states. The steps may be the same as those of the first charging indication mode, and will not be repeated here.

[0104] In an optional embodiment of the present application, reference Fig.11 , the charging indication control method further includes:

[0105] S140, obtaining an output second charging current;

[0106] S150, converting the second charging current into a second bus protocol signal;

[0107] S160, entering a second charging indication mode, controlling the display of different graphics according to the first bus protocol signal and the second bus protocol signal to indicate different charging states.

[0108] By acquiring the output first charging current and the second charging current, and according to the difference between the second charging current and the second bus protocol signal after conversion, and the difference between the first charging current and the first bus protocol signal after conversion, different graphics are controlled to be displayed to indicate different charging states, so as to indicate different charging states of the charging device and improve the user experience of the charging device.

[0109] Specifically, the charging indication control circuit includes a first interface module 140 and a second interface module 210 , as well as the corresponding first fast charging protocol chip 120 (U2) and second fast charging protocol chip 170 (U3), a first current detection module 150 and a second current detection module 190 .

[0110] When both the first interface module 140 and the second interface module 210 have current outputs, the display of the charging status is controlled based on the first bus protocol signal and the second bus protocol signal corresponding to the first charging current and the second charging current, and the display module 160 is controlled to display different graphics, which can effectively avoid the problem of confusing display of different charging statuses of different electronic devices connected to the first interface module 140 and the second interface module 210.

[0111] Specifically, refer to Fig.12Step S160 enters the second charging indication mode, and the steps of controlling the display of different graphics according to the first bus protocol signal and the second bus protocol signal include:

[0112] S210, determining whether both the first bus protocol signal and the second bus protocol signal are bus protocol signals that satisfy a full condition;

[0113] S220, if yes, control the display of a second graphic to indicate that it is in a full state;

[0114] S230: If not, control the display of a first graphic to indicate that the battery is in a charging state.

[0115] In the case where both the first interface module 140 and the second interface module 210 are connected to electronic devices for charging, the bus protocol signal that satisfies the full condition is a bus protocol signal that satisfies the charging current condition corresponding to the full state. If both the first bus protocol signal and the second bus protocol signal are bus protocol signals that satisfy the charging current condition corresponding to the full state, it indicates that the electronic devices connected to the first interface module 140 and the second interface module 210 are full, and the second graphic is controlled to be displayed to indicate that they are in the full state. If not, that is, both the first bus protocol signal and the second bus protocol signal are bus protocol signals that satisfy the charging current condition corresponding to the charging state, or one of them is a bus protocol signal that satisfies the charging current condition corresponding to the full state, and the other is a bus protocol signal that satisfies the charging current condition corresponding to the charging state, it indicates that both are charging, or one of them is charging and the other is full, then the first graphic is controlled to be displayed to indicate that they are in the charging state, avoiding the situation of confusing display, and further improving the user experience.

[0116] When electronic devices are connected to the first interface module 140, the second interface module 210, and the third interface module 220, if the first bus protocol signal, the second bus protocol signal, and the third bus protocol signal are all bus protocol signals that meet the charging current conditions corresponding to the full state, it indicates that the electronic devices connected to the first interface module 140, the second interface module 210, and the third interface module 220 are all fully charged, and the second graphic is controlled to be displayed to indicate that they are in the full state. If not, that is, the first bus protocol signal, the second bus protocol signal, and the third bus protocol signal are all bus protocol signals that meet the charging current conditions corresponding to the charging state, or one or two of them are bus protocol signals that meet the charging current conditions corresponding to the full state, and the other is a bus protocol signal that meets the charging current conditions corresponding to the charging state, it indicates that there is an electronic device that is not fully charged, and the first graphic is controlled to be displayed to indicate that it is in the charging state, so as to avoid the situation of confusing display and further improve the user experience.

[0117] In an optional embodiment of the present application, reference Fig.13 , before obtaining the first charging current output and obtaining the second charging current output, further comprising:

[0118] S310, determining whether a first charging current and a second charging current are output;

[0119] S320: If only the first charging current is output, only the output first charging current is obtained, and a first charging indication mode is entered;

[0120] S330, if only the second charging current is output, only the output second charging current is obtained, the second charging current is converted into a second bus protocol signal, a third charging indication mode is entered, and different graphics are displayed according to the second bus protocol signal to indicate different charging states;

[0121] S340: If both the first charging current and the second charging current are output, obtain the output first charging current and the second charging current, and enter the second charging indication mode;

[0122] S350: If neither the first charging current nor the second charging current is output, enter a fourth charging indication mode, and control the display of a third graphic to indicate a state to be charged.

[0123] Specifically, the first fast charging protocol chip 120 (U2) performs access detection of the first interface module 140 to determine whether the first interface module 140 has a first charging current output and whether an electronic device is connected. The second fast charging protocol chip 170 (U3) performs access detection of the second interface module 210 to determine whether the second interface module 210 has a second charging current output and whether an electronic device is connected. When only the first interface module 140 or only the second interface module 210 has a charging current output, that is, when an electronic device is connected, the main control chip 110 (U1) controls the display based on the corresponding first bus protocol signal or the second bus protocol signal, respectively, and enters the first charging indication mode and the third charging indication mode respectively, so as to realize the charging status indication when the first interface module 140 and the second interface module 210 are used alone. When both the first interface module 140 and the second interface module 210 have a charging current output and are connected to electronic devices, the display is controlled based on the first bus protocol signal and the second bus protocol signal to enter the second charging indication mode, so as to realize the charging status indication when both the first interface module 140 and the second interface module 210 are used. When there is no charging current in the first interface module 140 and the second interface module 210, the fourth charging indication mode is entered, and the third graphic is controlled to be displayed to indicate the state to be charged.

[0124] Therefore, by judging the output of the first charging current and the second charging current and entering different charging display modes according to the output conditions of the first charging current and the second charging current, the charging status can be accurately displayed for different numbers of devices connected to the interface module, further improving the user experience.

[0125] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A charging indication control circuit, characterized in that: It includes a main control chip, a first fast charging protocol chip, a first step-down module, a first interface module, a first current detection module and a display module. The main control chip is connected to the first fast charging protocol chip and the display module. The first step-down module is connected to the first fast charging protocol chip and the first interface module. The first fast charging protocol chip controls the first step-down module to step down the voltage and then outputs a first charging current through the first interface module. The first current detection module is connected to the first fast charging protocol chip. The first current detection module is used to detect the first charging current output by the first interface module and transmit the first charging current to the first fast charging protocol chip. The first fast charging protocol chip converts the first charging current into a first bus protocol signal. The main control chip controls the display module to display different graphics according to the first bus protocol signal to indicate different charging states.

2. The charging indication control circuit according to claim 1, characterized in that: The charging indication control circuit also includes a second fast charging protocol chip, a second step-down module, a second current detection module and a second interface module. The second fast charging protocol chip is connected to the main control chip. The second step-down module is connected to the second fast charging protocol chip and the interface module. The second fast charging protocol chip controls the second step-down module to step down the voltage and then outputs a second charging current through the second interface module. The second current detection module is used to detect the second charging current output by the second interface module and transmit the second charging current to the second fast charging protocol chip. The second fast charging protocol chip converts the second charging current into a second bus protocol signal. The main control chip controls the display module to display different graphics according to the first bus protocol signal and the second bus protocol signal.

3. The charging indication control circuit according to claim 2, characterized in that: The display module comprises a first display area, a second display area and a third display area, and the first display area, the second display area and the third display area are arranged and combined to display different graphics.

4. The charging indication control circuit according to claim 3, characterized in that: The first display area is provided with a first sub-display area, the second display area is provided with two second sub-display areas, and the third display area is provided with four third sub-display areas. The first display area, the third display area and the second display area are arranged in sequence along the first direction at intervals, and two second sub-display areas are arranged at intervals along the second direction, and in the second direction, the first sub-display area is located between two second sub-display areas, and the four third sub-display areas are arranged at intervals along the second direction, and in the second direction, every two third sub-display areas form a group and are arranged on both sides of a first sub-display area, and the two third sub-display areas in each group are arranged on both sides of a second sub-display area, and the first direction and the second direction are two directions perpendicular to each other.

5. The charging indication control circuit according to claim 4, characterized in that: The first fast charging protocol chip includes a first voltage output pin, the second fast charging protocol chip includes a second voltage output pin, the first sub-display area, the second sub-display area and the third sub-display area are each provided with at least one LED lamp, the positive pole of the LED lamp in the first sub-display area is connected to the first transmission pin of the main control chip, and the negative pole is grounded, the positive poles of the LED lamp in the second sub-display area and the LED lamp in the third sub-display area are both connected to the first voltage output pin and the second voltage output pin, the negative pole of the LED lamp in the second sub-display area is connected to the second transmission pin of the main control chip, and the negative pole of the LED lamp in the third sub-display area is connected to the third transmission pin of the main control chip.

6. A charging indication control method, characterized in that: Applied to the charging indication control circuit according to any one of claims 1 to 5, the charging indication control method comprises: Obtaining a first output charging current; Converting the first charging current into a first bus protocol signal; Entering the first charging indication mode, different graphics are displayed according to the first bus protocol signal to indicate different charging states.

7. The charging indication control method according to claim 6, characterized in that: The charging indication control method further includes: Obtaining a second charging current outputted; converting the second charging current into a second bus protocol signal; Entering the second charging indication mode, different graphics are displayed according to the first bus protocol signal and the second bus protocol signal to indicate different charging states.

8. The charging indication control method according to claim 7, characterized in that: The step of entering the second charging indication mode and controlling the display of different graphics according to the first bus protocol signal and the second bus protocol signal comprises: Determining whether the first bus protocol signal and the second bus protocol signal are both bus protocol signals that satisfy a full condition; If yes, controlling the display of a second graphic to indicate that it is in a full state; If not, the control displays the first graphic to indicate that it is in a charging state.

9. The charging indication control method according to claim 7, characterized in that: Before obtaining the output first charging current and obtaining the output second charging current, the method further includes: Determine whether the first charging current and the second charging current are output; If only the first charging current is output, only the output first charging current is obtained, and the first charging indication mode is entered; If only the second charging current is output, only the output second charging current is obtained, the second charging current is converted into a second bus protocol signal, and a third charging indication mode is entered, and different graphics are controlled to be displayed according to the second bus protocol signal to indicate different charging states; If both the first charging current and the second charging current are output, the output first charging current and the second charging current are obtained, and a second charging indication mode is entered; If neither the first charging current nor the second charging current is output, the fourth charging indication mode is entered, and the third graphic is controlled to be displayed to indicate the state to be charged.

10. The charging indication control method according to claim 6, characterized in that: The first bus protocol signal includes a first sub-signal and a second sub-signal, and the step of entering the first charging indication mode and controlling the display of different graphics according to the first bus protocol signal includes: When the first charging current exceeds the first preset current, converting the first charging current into a first sub-signal, and controlling the display of a first graphic based on the first sub-signal to indicate that the device is in a charging state; When the first charging current exceeds the second preset current and is less than the first preset current, the first charging current is converted into a second sub-signal, and the display of a second graphic is controlled based on the second sub-signal to indicate that the battery is in a full charge state.

11. A charging device, characterized in that: It includes an AC-DC conversion module and a charging indication control circuit as described in any one of claims 1 to 5, wherein the voltage input terminal of the AC-DC conversion module is connected to an external power supply, and the voltage output terminal is connected to the power input terminal of the first fast charging protocol chip of the charging indication control circuit.

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