CN111933091B

CN111933091B - Electrochromic film drive circuit

Info

Publication number: CN111933091B
Application number: CN202010878708.2A
Authority: CN
Inventors: 祁庆克
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-06-21
Anticipated expiration: 2040-08-27
Also published as: CN111933091A

Abstract

The invention discloses an electrochromic film driving circuit which comprises a load switch, a control module connected with the load switch and a driving module connected with the control module, wherein the driving module comprises a first field effect tube, a second field effect tube, a third field effect tube and a fourth field effect tube, the first field effect tube is connected with the second field effect tube, and the third field effect tube is connected with the fourth field effect tube. The electrochromic film driving circuit is electricity-saving, actively controllable and capable of being continuously adjusted, design impression of the terminal device is improved, and user experience is enhanced.

Description

Electrochromic film drive circuit

Technical Field

The invention relates to the field of mobile communication, in particular to an electrochromic film driving circuit.

Background

In the prior art, along with the rapid development of intelligent terminal equipment, the user also becomes higher and higher to intelligent terminal equipment's appearance design demand, however, the design scheme of terminal equipment among the prior art leaves the factory and has already been confirmed promptly, can't make the adaptability adjustment to the outward appearance colour in the later stage use.

In order to solve the defects in the prior art, a technical scheme of an electrochromic film is provided at present, but the control scheme of the electrochromic film applied to the device end is single at present, the presented effect is not rich enough, and the experience of a user is not good.

Disclosure of Invention

In order to solve the technical defects in the prior art, the invention provides an electrochromic film driving circuit, which comprises a load switch, a control module connected with the load switch, and a driving module connected with the control module, wherein the driving module comprises a first field-effect tube, a second field-effect tube, a third field-effect tube and a fourth field-effect tube, the first field-effect tube is connected with the second field-effect tube, and the third field-effect tube is connected with the fourth field-effect tube.

Optionally, the circuit further includes a power supply, the power supply is a low dropout regulator or a dc power converter, and the power supply has a working output range of 0.5V to 1.5V.

Optionally, the load switch is a load switch.

Optionally, the control module includes a resistor, and a fifth field effect transistor connected to the resistor, where the resistor and the fifth field effect transistor form an inverter.

Optionally, the control module comprises an integrated circuit isolator.

Optionally, the input voltage of the control module is 3.5V-4.5V.

Optionally, the input voltage of the load switch is 1.8V and above.

Optionally, the input voltage of the driving circuit is above 3.3V.

Optionally, the circuit further includes a processing module, where the processing module is configured to output a control signal to the load switch and is further configured to output a setting signal to the driving circuit.

Optionally, the load switch determines a current switch configuration according to the control signal, and charges the electrochromic film when the switch configuration is high, and stops charging the electrochromic film when the switch configuration is low.

The electrochromic film driving circuit comprises a load switch, a control module connected with the load switch, and a driving module connected with the control module, wherein the driving module comprises a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor, the first field effect transistor is connected with the second field effect transistor, and the third field effect transistor is connected with the fourth field effect transistor. The electrochromic film driving circuit is electricity-saving, actively controllable and capable of being continuously adjusted, design impression of the terminal device is improved, and user experience is enhanced.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic diagram of a hardware structure of a mobile terminal according to the present invention;

fig. 2 is a communication network system architecture diagram provided by an embodiment of the present invention;

fig. 3 is a circuit diagram of a first embodiment of an electrochromic film driving circuit of the present invention;

fig. 4 is a block diagram of a second embodiment of an electrochromic film driving circuit of the present invention;

fig. 5 is a flowchart of a third embodiment of an electrochromic film driving circuit of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).

WiFi belongs to a short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send emails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, etc. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.

Example one

Fig. 3 is a circuit diagram of a first embodiment of an electrochromic film driving circuit of the present invention. This embodiment has proposed an electrochromic membrane drive circuit, the circuit include load switch, with the control module that load switch connects, with the drive module that control module connects, wherein, drive module includes first field effect transistor, second field effect transistor, third field effect transistor and fourth field effect transistor, wherein, first field effect transistor with the second field effect transistor is connected, the third field effect transistor with the fourth field effect transistor is connected. Specifically, as shown in fig. 1, the input end of the load switch is connected to a control end, the control end may be a microprocessor or a coprocessor, the output end of the load switch is connected to a first field effect transistor and a fourth field effect transistor, one end of the first field effect transistor is connected to one end of the second field effect transistor, the other end of the second field effect transistor is grounded, one end of the fourth field effect transistor is connected to one end of the third field effect transistor, and the other end of the third field effect transistor is grounded. In the present embodiment, EC _ P and EC _ M are signal input terminals of the electrochromic film. In this embodiment, the operating characteristics of the electrochromic film (EC) are utilized, that is, the state switching between the fully transmissive mode and the non-transmissive colored mode of the electrochromic film is realized by applying dc voltages with positive and negative polarities to the EC film by using low-voltage dc driving, and the forward charging and reverse charging functions of the electrochromic film are realized.

In the embodiment, because the adopted device has a memory effect of power-on time, only voltage needs to be applied when light transmittance is changed, and the power consumption is extremely low and generally does not exceed 0.5W/m 2; meanwhile, in the embodiment, direct-current low-voltage driving is adopted, and the voltage does not exceed +/-1.5V, so that the electrochromic film driving circuit of the embodiment is actively controllable; further, in this embodiment, the transmittance of light can be continuously adjusted, and the transmittance can reach 5% or less in the non-transmissive mode.

In this embodiment, the electrochromic film driving circuit is disposed in a rear case or a middle frame of the terminal device, or in a protective sleeve or a heat dissipation sleeve matched with the terminal device.

The advantage of this embodiment lies in, through providing an electrochromic membrane drive circuit, the circuit include load switch, with the control module that load switch connects, with the drive module that control module connects, wherein, drive module includes first field effect transistor, second field effect transistor, third field effect transistor and fourth field effect transistor, wherein, first field effect transistor with the second field effect transistor is connected, the third field effect transistor with the fourth field effect transistor is connected. The power-saving, active and controllable and continuously-adjustable electrochromic film driving circuit is realized, the design impression of the terminal equipment is improved, and the user experience is enhanced.

Example two

Based on the foregoing embodiment, in this embodiment, optionally, in this embodiment, the circuit further includes a power supply, where the power supply is a low dropout regulator or a dc power converter, and the power supply has a working output range of 0.5V to 1.5V.

Optionally, in this embodiment, the load switch is a load switch.

Optionally, in this embodiment, the control module includes a resistor, and a fifth fet connected to the resistor, where the resistor and the fifth fet form an inverter.

Optionally, in this embodiment, the control module is an integrated circuit isolator.

Optionally, in this embodiment, the input voltage of the control module is 3.5V to 4.5V.

Optionally, in this embodiment, the input voltage of the load switch is 1.8V or more.

Optionally, in this embodiment, the input voltage of the driving circuit is above 3.3V.

Optionally, in this embodiment, the circuit further includes a processing module, where the processing module is configured to output a control signal to the load switch and is further configured to output a setting signal to the driving circuit.

Optionally, in this embodiment, the load switch determines a current switch configuration according to the control signal, and charges the electrochromic film when the switch configuration is high, and stops charging the electrochromic film when the switch configuration is low.

The present embodiment has an advantage in that, with an electrochromic film driving circuit, a load switch determines a current switch configuration according to the control signal, and charges an electrochromic film when the switch configuration is high, and stops charging the electrochromic film when the switch configuration is low. The electrochromic film driving circuit is electricity-saving, actively controllable and capable of being continuously adjusted, design impression of the terminal device is improved, and user experience is enhanced.

EXAMPLE III

Fig. 4 is a block diagram of a second embodiment of an electrochromic film driving circuit of the present invention. Based on the above embodiments, in this embodiment, the apparatus includes a processor module 140, a low voltage dc power supply 110, a load switch 120, and an electrochromic film driving circuit 130, wherein an output terminal of the low voltage dc power supply 110 is connected to the load switch 120, a signal input terminal of the load switch 120 is connected to a signal output terminal of the processor module 140, and meanwhile, a signal output terminal of the processor module 140 is connected to a setting signal input terminal of the electrochromic film driving circuit 130.

The embodiment has the advantages that the integrated electrochromic film drive is provided, so that the integrated electrochromic film drive can be conveniently adapted to various types of terminal equipment such as mobile terminals and wearable equipment, the implementation cost of the scheme is reduced, and the appearance design experience of each terminal or each equipment is improved.

Example four

Fig. 5 is a flowchart of a third embodiment of an electrochromic film driving circuit of the present invention. Based on the above embodiments, in this embodiment, first, when the power is turned on, the transmittance or color of the electrochromic film is set, then, when the control signal controls the load switch to be turned on, the electrochromic film starts to be charged, and at the same time, the current charging time is recorded, when the charging time does not reach the preset value T, the charging state is continuously maintained, and when the charging time reaches the preset value T, the control signal controls the load switch to be turned off, and the electrochromic stops charging. In this embodiment, a charging circuit capable of switching polarities in a programmed manner is built by using the separation devices composed of the five field effect transistors, so that the requirements of different polarities of the electrochromic film are met, and the state switching of the light transmittance of the electrochromic film is realized.

It should be noted that, in this embodiment, a Load switch (Load switch) without QOD (fast discharge) is used as a power management module of the power charging circuit, when the low-voltage dc power supply is always turned on, the Load switch is turned off, and then the electrochromic film does not leak to the power supply side, so that the state retention time of the electrochromic film can be maintained.

The beneficial effects of this embodiment lie in, through the terminal processor, perhaps charge under the different polarity state of the inside coprocessor management electrochromic membrane of terminal, realize the state switching of membrane luminousness to and pass through the intelligence switching between look and the dark, simultaneously, still possess power saving, initiative controllable, and the beneficial effect that can continuous adjustment, improved terminal equipment's design impression, strengthened user experience.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The electrochromic film driving circuit is characterized by comprising a load switch, a control module connected with the load switch and a driving module connected with the control module, wherein the driving module comprises a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor, the first field effect transistor is connected with the second field effect transistor, and the third field effect transistor is connected with the fourth field effect transistor;

the circuit further comprises a processing module, wherein the processing module is used for outputting a control signal to the load switch and is also used for outputting a setting signal to the driving circuit;

the load switch determines the current switch configuration according to the control signal, when the switch configuration is high, the electrochromic film is charged, and when the switch configuration is low, the electrochromic film is stopped from being charged; wherein the load switch is a non-fast charging load switch;

when the load switch is controlled to be turned on, the electrochromic film starts to be charged, meanwhile, the current charging time is recorded, when the charging time does not reach a preset value T, the charging state is continuously kept, and when the charging time reaches the preset value T, the load switch is controlled to be turned off, and the electrochromic film stops being charged.

2. The electrochromic film driving circuit according to claim 1, further comprising a power supply, wherein the power supply is a low dropout linear regulator or a dc power converter, and the power supply has an operating output ranging from 0.5V to 1.5V.

3. The electrochromic film driving circuit according to claim 1, wherein the load switch is a load switch.

4. The electrochromic film driving circuit according to claim 1, wherein the control module comprises a resistor, and a fifth field effect transistor connected to the resistor, and the resistor and the fifth field effect transistor constitute an inverter.

5. The electrochromic film driving circuit according to claim 1, wherein the control module comprises an integrated circuit isolator.

6. The electrochromic film driving circuit according to claim 1, wherein an input voltage of the control module is 3.5V to 4.5V.

7. The electrochromic film driving circuit according to claim 1, wherein an input voltage of the load switch is 1.8V or more.

8. The electrochromic film driving circuit according to claim 1, wherein an input voltage of the driving circuit is 3.3V or more.