CN220731153U

CN220731153U - Passive driving circuit of ink screen and mobile phone shell

Info

Publication number: CN220731153U
Application number: CN202420366562.7U
Authority: CN
Inventors: 修惠文; 艾满荣; 覃永利; 陆伦武
Original assignee: Shenzhen Meikai Innovation Technology Co ltd
Current assignee: Shenzhen Meikai Innovation Technology Co ltd
Priority date: 2024-02-28
Filing date: 2024-02-28
Publication date: 2024-04-05
Anticipated expiration: 2034-02-28

Abstract

The embodiment of the application provides a passive driving circuit of an ink screen and a mobile phone shell, wherein the passive driving circuit is used for driving the ink screen and comprises an antenna circuit; a Qi circuit connected with the antenna circuit to obtain electric energy through the antenna circuit, the Qi circuit being used for being connected with the ink screen to supply power to the ink screen; and the processor is connected with the output end of the Qi circuit, the Qi circuit supplies power for the processor, and the processor is used for being connected with the ink screen so as to drive the ink screen to update display contents. The antenna circuit can be connected with external equipment such as a mobile phone in a wireless way, the Qi circuit can acquire electric energy through the antenna circuit, the electric energy is supplied to the ink screen when the ink screen updates display content, the passive driving circuit directly acquires the electric energy from the external equipment, a battery is not required to be arranged, the problem that the ink screen cannot be driven to update the display content when the battery is used up is solved, and the ink screen is more convenient to use.

Description

Passive driving circuit of ink screen and mobile phone shell

Technical Field

The application relates to the technical field of electronics, in particular to a passive driving circuit of an ink screen and a mobile phone shell.

Background

With the development of society, mobile phones have become indispensable equipment in people's daily life, and with the increasing of mobile phone functions, the use scene of mobile phones is also more and more, and the time of using mobile phones is also longer and more. At present, mobile phones are generally equipped with mobile phone shells to protect the mobile phones, and some mobile phone shells are provided with patterns to meet the demands of customers. Some mobile phone shells are provided with electronic ink screens, and the electronic ink screens can change different display contents according to requirements, however, the electronic ink screens in the related art are inconvenient to use due to the fact that batteries are required to be built in.

Disclosure of Invention

The embodiment of the application provides a passive drive circuit and cell-phone shell of ink screen, and passive drive circuit directly obtains the electric energy from external equipment, need not set up the battery, and it is more convenient to use.

In a first aspect, embodiments of the present application provide a passive driving circuit of an ink screen, where the passive driving circuit is configured to drive the ink screen, and the passive driving circuit includes:

an antenna circuit;

a Qi circuit connected with the antenna circuit to obtain electric energy through the antenna circuit, the Qi circuit being used for being connected with the ink screen to supply power to the ink screen;

and the processor is connected with the output end of the Qi circuit, the Qi circuit supplies power for the processor, and the processor is used for being connected with the ink screen so as to drive the ink screen to update display contents.

In some embodiments, the passive drive circuit further comprises:

and a physical switch connected between the Qi circuit and the processor, wherein the physical switch is used for being triggered by the outside to realize on or off.

In some embodiments, the passive drive circuit further comprises:

the input end of the transformation circuit is connected with the output end of the Qi circuit, the output end of the transformation circuit is connected with the processor and the ink screen so as to supply power for the processor and the ink screen, and the voltage output by the output end of the transformation circuit is different from the voltage input by the transformation circuit.

In some embodiments, the transformation circuit comprises:

the input end of the transformation chip is connected with the output end of the Qi circuit, and the output end of the transformation chip is connected with the processor and the ink screen;

the first filter circuit is connected between the input end of the transformation chip and the ground;

and the second filter circuit is connected between the output end of the transformation chip and the ground.

In some embodiments, the passive driving circuit further includes a screen driving circuit including:

one end of the driving inductor is connected with the output end of the voltage transformation circuit;

the input end of the driving switch tube is connected with the other end of the driving inductor, and the control end of the driving switch tube is used for inputting a control signal of the ink screen;

the first resistor is connected between the output end of the driving switch tube and the ground;

the positive electrode of the first driving diode is connected with the other end of the driving inductor, and the negative electrode of the first driving diode is used for being connected with the ink screen;

one end of the first driving capacitor is connected with the other end of the driving inductor;

the second driving capacitor is connected between the cathode of the first driving diode and the ground;

the anode of the second driving diode is connected with the other end of the first driving capacitor, and the cathode of the second driving diode is grounded;

and the cathode of the third driving diode is connected with the other end of the first driving capacitor, and the anode of the third driving diode is used for being connected with the ink screen.

In some embodiments, the passive drive circuit further comprises:

and the wireless communication circuit is connected with the processor, and the processor can communicate with external equipment wirelessly through the wireless communication circuit.

In some embodiments, the processor acquires a data signal transmitted by an external device through the wireless communication circuit, and controls the ink screen to update display content according to the data signal.

The embodiment of the application also provides a mobile phone shell, which comprises:

a housing;

an ink screen mounted to the housing;

and the passive driving circuit is arranged on the shell and connected with the ink screen, and the passive driving circuit is any one of the passive driving circuits.

In some embodiments, the passive driving circuit includes a first antenna, and the wireless communication circuit includes a second antenna, where the first antenna and the second antenna are disposed in the housing at intervals.

In some embodiments, the antenna circuit in the passive driving circuit includes a first antenna, the first antenna is used for transmitting energy with a transmitting antenna of the mobile phone, the housing is provided with a positioning portion, the positioning portion is arranged corresponding to the transmitting antenna of the mobile phone, and the first antenna is installed in the positioning portion, so that the first antenna is opposite to the transmitting antenna of the mobile phone.

In the passive driving circuit of the ink screen, the antenna circuit can be in wireless connection with external equipment such as a mobile phone, the Qi circuit can acquire electric energy through the antenna circuit, the ink screen is powered when the display content of the ink screen is updated, the passive driving circuit directly acquires electric energy from the external equipment, a battery is not required to be arranged, and the problem that the ink screen cannot be driven to update the display content when the battery is used up does not exist, so that the passive driving circuit is more convenient to use. In addition, the thickness of the passive driving circuit can be reduced without arranging a battery, and the passive driving circuit is conveniently arranged in a thinner product (such as a mobile phone shell).

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts throughout the following description.

Fig. 1 is a schematic diagram of a first structure of a passive driving circuit according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a second structure of a passive driving circuit according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a third structure of a passive driving circuit according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a transformer circuit in the passive driving circuit shown in fig. 3.

Fig. 5 is a schematic diagram of a fourth configuration of a passive driving circuit according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a wireless communication circuit in the passive driving circuit shown in fig. 5.

Fig. 7 is a schematic structural diagram of a panel driving circuit in a passive driving circuit according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a mobile phone case according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a case in the mobile phone case shown in fig. 8.

Reference numerals illustrate:

1. a mobile phone case;

10. a housing 110, a protective housing body 111, a housing chamber 112, a bottom wall 114, an annular wall 116, a positioning portion 120, a supporting member 130, a first cover plate 150, a second cover plate;

20. an ink screen;

80. passive drive circuitry, 81, antenna circuitry, 82, qi circuitry, 835, transformer circuitry, 84, processor, 86, physical switch, 88, wireless communication circuitry.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.

Referring to fig. 1, fig. 1 is a schematic diagram of a first structure of a passive driving circuit provided in an embodiment of the present application. The passive drive circuit 80 is for driving the ink screen 20, the passive drive circuit 80 comprising an antenna circuit 81, a Qi circuit 82 and a processor 84.

The antenna circuit 81 can be connected wirelessly with an external device such as a cellular phone. The Qi circuit 82 is connected to the antenna circuit 81 to obtain electric power through the antenna circuit 81, and the Qi circuit 82 is used to connect to the ink screen 20 to supply power to the ink screen 20. The processor 84 is connected to an output of the Qi circuit 82, the Qi circuit 82 powering the processor 84, the processor 84 being adapted to connect with the ink screen 20 to drive the ink screen 20 to update the display.

The antenna circuit 81 can be connected with external equipment such as a mobile phone in a wireless mode, the Qi circuit 82 can acquire electric energy through the antenna circuit 81 and supply power for the ink screen 20 when the ink screen 20 updates display content, the passive driving circuit 80 directly acquires electric energy from the external equipment, a battery is not required to be arranged, the problem that the ink screen 20 cannot be driven to update display content when the battery runs out does not exist, and the use is more convenient. In addition, the thickness of the passive driving circuit 80 can be reduced without providing a battery, so that the passive driving circuit 80 can be conveniently arranged in a relatively thin product (such as a mobile phone shell).

In some embodiments, referring to fig. 2, fig. 2 is a schematic diagram of a second structure of a passive driving circuit according to an embodiment of the present application. The passive drive circuit 80 further comprises a physical switch 86, the physical switch 86 being connected between the Qi circuit 82 and the processor 84, the physical switch 86 being adapted to be externally triggered to be turned on or off. When the physical switch 86 is turned off, the Qi circuit 82 is turned off from the processor 84 at the rear end, the processor 84 cannot work, and the whole passive driving circuit 80 cannot work, at this time, the passive driving circuit 80 basically does not affect the Qi function or the NFC function of the external device such as the mobile phone, for example, the external device can also wirelessly charge other devices by using Qi technology, or can also perform access control identification or mobile payment by using NFC technology. When the physical switch 86 is turned on, the Qi circuit 82 is connected to the processor 84 at the rear end, and if the Qi circuit 82 can obtain energy provided by an external device, electric energy can be output to disable the processor 84, so that the whole passive driving circuit 80 can also operate normally.

The physical switch 86 may be a toggle switch or a push switch. The toggle switch is turned on or off by a user, and if the toggle lever of the toggle switch is turned to a first position, the physical switch 86 is turned on, and if the toggle lever of the toggle switch is turned to a second position, the physical switch 86 is turned off. The push switch is turned on or off by the user pressing, for example, one of the push switches the physical switch 86 on, the next push switches the physical switch 86 off, and the next push switches the physical switch 86 on, so that the cycle is repeated. The physical switch 86 may also be other types of switches, and the type of physical switch 86 is not limited herein.

In some embodiments, referring to fig. 3, fig. 3 is a schematic diagram of a third structure of a passive driving circuit according to an embodiment of the present application. The passive driving circuit 80 further includes a voltage transformation circuit 835, an input end of the voltage transformation circuit 835 is connected to an output end of the Qi circuit 82, and an output end of the voltage transformation circuit 835 is connected to the processor 84 and the ink screen 20 to supply power to the processor 84 and the ink screen 20, and a voltage output from the output end of the voltage transformation circuit 835 is different from a voltage input from the voltage transformation circuit 835.

Referring to fig. 4, fig. 4 is a schematic diagram of a transformer circuit in the passive driving circuit shown in fig. 3. In some embodiments, the transformer circuit 835 includes a transformer chip U4, a first filter circuit, and a second filter circuit. The input of transformer chip U4 is connected to the output of Qi circuit 82 and the output of transformer chip U4 is connected to processor 84 and ink screen 20. The first filter circuit is connected between the input end of the transformation chip U4 and the ground to filter the signal input into the transformation chip; the second filter circuit is connected between the output end of the transformer chip U4 and the ground to filter the signal output by the transformer chip.

In some examples, the first filter circuit may include a filter capacitor C12 and a filter capacitor C13 connected in parallel, where the filter capacitor C12 and the filter capacitor C13 are both connected between the input of the transformer chip and ground. The first filter circuit may also comprise one filter capacitor or three and more filter capacitors connected in parallel.

The second filter circuit may include a filter capacitor C10 and a filter capacitor C11 connected in parallel, where the filter capacitor C10 and the filter capacitor C11 are both connected between the output terminal of the transformer chip and ground. The second filter circuit may also comprise one filter capacitor or three and more filter capacitors connected in parallel.

In some examples, the voltage transformation circuit 835 further includes a current limiting resistor R2 and a current limiting resistor R3, where one end of the current limiting resistor R2 is connected to the output end of the voltage transformation chip U4 to perform current limiting protection on the voltage signal output by the current transformation chip U4. Similarly, one end of the current limiting resistor R3 is connected with the output end of the voltage transformation chip U4 so as to perform current limiting protection on the voltage signal output by the voltage transformation chip U4. The resistance values of the current limiting resistor R2 and the current limiting resistor R3 are different, so that the output voltages after current limiting protection are different, namely, the voltages of VOUT, VDD3V3 and VCC are different. It will be appreciated that in some examples, the voltage transformation circuit 835 may not output VOUT and VCC, and the circuitry corresponding to VOUT and VCC may be eliminated.

In some examples, the transformer circuit 835 further includes a plurality of test points T1, T2, T3, and T4, and the plurality of test points T1, T2, T3, and T4 may perform voltage or current testing during the testing phase or before shipping of the transformer circuit 835, so as to confirm whether the transformer circuit 835 meets the specification.

In some embodiments, referring to fig. 5 and fig. 6, fig. 5 is a schematic diagram of a fourth structure of a passive driving circuit provided in an embodiment of the present application, and fig. 6 is a schematic diagram of a wireless communication circuit in the passive driving circuit shown in fig. 5. The passive drive circuit 80 also includes a wireless communication circuit 88, the wireless communication circuit 88 being coupled to the processor 84, the processor 84 being capable of wirelessly communicating with external devices via the wireless communication circuit 88. The processor 84 obtains power through the Qi circuit 82, the Qi circuit 82 transmits data at a slower rate, and the processor 84 transmits data through another wireless communication circuit, so that the data signal transmission for updating the display content of the ink screen 20 can be completed more quickly.

The wireless communication circuit 88 may be a wireless bluetooth communication circuit, which may include an antenna ANT1 and a mating circuit connected to the antenna ANT 1. In some examples, the matching circuit may include a capacitor C8, a resistor R1, and a capacitor C9, with the matching circuit implementing frequency adjustment in conjunction with the antenna ANT 1. Specifically, different frequencies can be obtained by selecting different capacitors C8, R1 and C9.

In other examples, the wireless communication circuit 88 may also be other wireless communication circuits, such as wifi wireless communication circuits.

With continued reference to fig. 6, it is to be understood that the processor 84 of the passive driving circuit 80 has functional pins for implementing corresponding functions. In some examples, processor 84 includes pins P01-P09, where pin P01 and pin P02 are used to connect keys to receive control commands transmitted by a user via the keys. Pin P03 and pin P04 are connected for communication with other devices, pin P03 is for outputting signals, and pin P04 is for receiving signals. The pin P05 and the pin P06 control the red LED lamp and the blue LED lamp to prompt different working states. Pin P07 is used to connect a reset circuit for resetting the processor 84. Pins P08 and P09 are I2C pins for I2C communication with other devices, pin P08 is for transmitting clock signals, and pin P09 is for transmitting data signals.

The processor 84 may also output a voltage signal, for example, a pin of the processor 84 may output a voltage signal of 3.3V, and a pin of the output 3.3V may also be connected to the capacitor C4 and the capacitor C5 for filtering. The other pin of the processor 84 may output a voltage signal for powering other components, such as a wireless communication circuit, and the pin for powering other components may also be coupled to a capacitor, such as capacitor C6, for filtering.

In some examples, the passive driving circuit is further provided with an external interface J2, which can be connected to an external device. The external interface J2 has a transmitting port TX and a receiving port RX, a power supply port VCC and a ground port GND.

In some examples, the processor 84 may be a bluetooth chip or a chip incorporating a bluetooth chip. In other examples, the wireless bluetooth communication circuit may include a bluetooth chip and a bluetooth antenna circuit, and the processor 84 is connected to the bluetooth chip to transmit data through the bluetooth chip and the bluetooth antenna circuit.

In some embodiments, the processor 84 obtains data signals transmitted by the external device via the wireless communication circuit and controls the ink screen 20 to update the display content according to the data signals. The Qi circuit 82 is mainly responsible for transmitting power, the wireless communication circuit is mainly responsible for transmitting data, and the processor 84 can control the power supply to the ink screen 20 after acquiring the data signal for updating the display of the ink screen 20 through the wireless communication circuit, and control the ink screen 20 to update the display content according to the data signal.

In some embodiments, referring to fig. 7, fig. 7 is a schematic diagram of a structure of a panel driving circuit in a passive driving circuit according to an embodiment of the present application. The passive driving circuit 80 further includes a panel driving circuit including a driving inductance L2, a driving switching transistor Q4, a first driving resistor R38, a first driving diode D10, a second driving diode D9, a third driving diode D8, a first driving capacitor C52, and a second driving capacitor C54.

The driving inductor L2, one end of the driving inductor L2 is connected to the output end of the voltage transformation circuit 835;

the driving switch tube Q4, the input end of the driving switch tube Q4 is connected to the other end of the driving inductor L2, and the control end of the driving switch tube Q4 is used for inputting a control signal of the ink screen 20;

the first driving resistor R38 is connected between the output end of the driving switch tube Q4 and the ground;

the positive electrode of the first driving diode D10 is connected with the other end of the driving inductor L2, and the negative electrode of the first driving diode D10 is connected with the ink screen 20;

the first driving capacitor C52, one end of the first driving capacitor C52 is connected to the other end of the driving inductor L2;

the second driving capacitor C54, the second driving capacitor C54 is connected between the cathode of the first driving diode D10 and the ground;

the anode of the second driving diode D9 is connected with the other end of the first driving capacitor C52, and the cathode of the second driving diode D9 is grounded;

and the negative electrode of the third driving diode D8 is connected with the other end of the first driving capacitor C52, and the positive electrode of the third driving diode D8 is connected with the ink screen 20.

For ease of understanding, the screen driving circuit will be described below. The input voltage at the output end of the voltage transformation circuit 835 can be set as 3.3V according to the requirement, and the driving inductance L2, the driving switching tube Q4, the second driving capacitor C54, the first driving diode D10 and the first driving resistor R38 form a basic boost circuit, and the on or off state of the driving switching tube Q4 is controlled by the GDR pin of the ink screen 20.

When the driving switch Q4 is turned on, the input voltage passes through the driving inductor L2 and then directly returns to GND through the first driving resistor R38, which results in a linear increase of the current through the driving inductor L2, and at this time, the second driving capacitor C54 discharges to the load.

When the driving switching transistor Q4 is turned off, since the current of the driving inductance L2 cannot be suddenly changed instantaneously, the reverse electromotive force Vs is generated on the driving inductance L2 to maintain the passing current unchanged. At this time, the first driving diode D10 is turned on, and after the two voltages of 3.3V and Vs are connected in series, the load is supplied with a voltage exceeding 3.3V, and the second driving capacitor C54 is charged, so that the voltage boosting operation on the VGH pin of the ink panel 20 is achieved.

Similarly, for the VGL pin of the ink screen 20, when the driving switch Q4 is turned off, the first driving capacitor C52 is charged, the second driving diode D9 is turned on, the third driving diode D8 is turned off, and the current flows to GND through the second driving diode D9, and ideally, the voltage difference across the first driving capacitor C52 is 3.3v+vs.

When the driving switch Q4 is turned on, the drain of the driving switch Q4 is close to 0V, and since the voltage of the first driving capacitor C52 cannot be suddenly changed, the K-pole potential of the third driving diode D8 is- (3.3v+vs), the first driving capacitor C52 is discharged, the second driving diode D9 is turned off, the third driving diode D8 is turned on, and the current flows to the first driving capacitor C52 through the third driving diode D8, thereby realizing the negative voltage "boosting" operation on the VGL pin of the ink screen 20. The voltages of VGH and VGL may be set according to the type of ink screen 20, for example VGH may be +15V and VGL may be-15V.

In some embodiments, the panel driving circuit may further include a second driving resistor R39, and the second driving resistor R39 is connected between the control terminal of the driving switching transistor Q4 and the ground.

The screen driving circuit may further include a third driving capacitor C53, the third driving capacitor C53 being connected between the anode of the third driving diode D8 and ground,

the panel driving circuit may further include a fourth driving capacitor C56, and the fourth driving capacitor C56 is connected between the output terminal of the driving switching transistor Q4 and the ground. Alternatively, the fourth driving capacitor C56 may be replaced by a resistor.

The screen driving circuit may further include a fifth driving capacitor connected between one end of the driving inductor L2 and the ground.

It should be noted that, in the passive driving circuit 80, the Qi circuit 82 can provide a larger amount of power, and the Qi circuit 82 provides a much larger amount of power than the NFC chip in the related art, so as to meet the power supply requirements of many ink screens 20. But the Qi circuit 82 transmits data at a slower rate and thus data is transmitted through a wireless communication circuit such as a wireless bluetooth communication circuit to improve the efficiency of data transmission.

The embodiment of the application also provides a mobile phone shell, please refer to fig. 8, fig. 8 is a schematic structural diagram of the mobile phone shell provided in the embodiment of the application. The mobile phone case 1 includes a case 10, an ink screen 20, and a passive drive circuit 80. The ink screen 20 is mounted on the housing 10, and the passive driving circuit 80 is mounted on the housing 10 and connected to the ink screen 20, and the passive driving circuit 80 may be any passive driving circuit in the foregoing embodiments, which is not described herein.

In some embodiments, the housing 10 may house a cell phone to protect the cell phone. In other embodiments, the housing 10 may be a rear housing of a cell phone.

In some embodiments, the housing 10 includes a protective housing 110, and the protective housing 110 is provided with a receiving cavity 111 for receiving a mobile phone. The protective housing 110 includes a bottom wall 112 and a surrounding wall 114 disposed around the bottom wall 112, and the bottom wall 112 and the surrounding wall 114 enclose a receiving chamber 111.

In some embodiments, the antenna circuit in the passive driving circuit includes a first antenna, and the wireless communication circuit in the passive driving circuit includes a second antenna, the first antenna and the second antenna being disposed in the housing at intervals. The first antenna is mainly matched with the Qi circuit to carry out energy transmission, the second antenna is mainly used for data transmission, and the first antenna and the second antenna are arranged at intervals, so that mutual interference is reduced.

In some embodiments, referring to fig. 9, fig. 9 is a schematic structural diagram of a housing in the mobile phone housing shown in fig. 8. The antenna circuit in the passive driving circuit comprises a first antenna, the first antenna is used for carrying out energy transmission with the transmitting antenna of the mobile phone, the shell 10 is provided with a positioning part 116, the positioning part 116 is arranged corresponding to the transmitting antenna of the mobile phone, and the first antenna is arranged in the positioning part 116 so that the first antenna is opposite to the transmitting antenna of the mobile phone. The locating portion 116 facilitates mounting the first antenna so that the first antenna is aligned with the transmitting antenna of the handset.

In some examples, the positioning portion 116 may be a protruding ring with a notch, where the side of the housing 10 facing the mobile phone is provided with the protruding ring, and the first antenna and the protruding ring are adapted, for example, the inner walls of the first antenna and the protruding ring have a gap or abut, so as to facilitate positioning and installation of the first antenna. The notch of the convex ring is convenient for the wiring of the first antenna and other circuit connection to pass through.

In some examples, the positioning portion 116 may also be a groove, and the side of the housing 10 facing the mobile phone is provided with the concave groove, and the first antenna and the groove are adapted, for example, the inner walls of the first antenna and the groove have a gap or abut against each other, so that positioning and installation of the first antenna are facilitated.

With continued reference to fig. 8, the housing 10 may also include a support member 120. The supporting member 120 has a hardness greater than that of the protective case body 110. The support member 120 is at least partially provided on the peripheral side of the ink screen 20 for restricting bending deformation of the ink screen 20.

Then, when the protective case body 110 is deformed by an external force, for example, when the consumer bends the protective case body 110 to disassemble the protective case body 110, the support member 120 with higher hardness is less likely to deform, so that the deformation of the support member 120 can be limited, the ink screen 20 is prevented from being bent to be damaged, and finally, the reliability and the service life of the protective case of the mobile phone can be improved.

In some embodiments, the support member 120 may be a metal piece. For example, the supporting member 120 may be made of stainless steel, aluminum or titanium, etc., which is not limited in the embodiment of the present application.

In some embodiments, the mobile phone case 1 includes a first cover 130, a protective housing 110, and a second cover 150, which are sequentially disposed, the protective housing 110 is provided with an opening, and the ink screen 20 is installed in the opening.

The ink screen 20 is fixedly attached, such as by adhesive or other fastening means, to the second cover plate 150. One end (such as the upper end) of the second cover plate 150 along the length direction of the mobile phone shell is fixedly connected with the protective shell body 110, such as glued or other fixing modes, and the other end (such as the lower end) of the second cover plate 150 along the length direction of the mobile phone shell body is detachably and movably matched with the protective shell body 110. The first cover 130 is fixedly connected to the protective housing 110, such as by gluing or other fixing methods, and the first cover 130 covers the ink screen 20 to protect the ink screen 20. The first cover 130 is a transparent hard protection structure, which may be tempered glass or hard transparent plastic.

Then, taking the case of detaching the mobile phone from the protective housing 110 as an example, the consumer may bend the lower end of the protective housing 110 by bending the lower end of the protective housing 110 so that the lower end of the protective housing 110 is separated from the mobile phone before the protective housing 110 is detached. When the consumer breaks the lower end of the protective housing body 110, the lower end of the second cover plate 150 can be separated from the lower end of the protective housing body 110, so that the second cover plate 150 and the ink screen 20 arranged on the second cover plate 150 can not be broken, and further the ink screen 20 can be prevented from being broken by breaking.

The embodiments, implementation manners and related technical features of the present application can be combined and replaced without conflict.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The passive driving circuit and the mobile phone shell of the ink screen provided by the embodiment of the application are described in detail, and specific examples are applied to the description of the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims

1. A passive drive circuit for an ink screen, the passive drive circuit for driving the ink screen, the passive drive circuit comprising:

an antenna circuit;

2. The passive drive circuit of an ink screen of claim 1, further comprising:

3. The passive drive circuit of an ink screen of claim 1, further comprising:

4. A passive drive circuit for an ink screen as claimed in claim 3, wherein the voltage transformation circuit comprises:

5. A passive drive circuit for an ink screen according to claim 3, wherein the passive drive circuit further comprises a screen drive circuit comprising:

6. The passive drive circuit of an ink screen of claim 1, further comprising:

7. The passive drive circuit of an ink screen of claim 6, wherein the processor obtains a data signal transmitted by an external device through the wireless communication circuit and controls the ink screen to update the display content according to the data signal.

8. A cell phone case, comprising:

a housing;

an ink screen mounted to the housing;

a passive drive circuit mounted to the housing and connected to the ink screen, the passive drive circuit being as claimed in any one of claims 1 to 7.

9. The mobile phone housing of claim 8, wherein the antenna circuit in the passive drive circuit comprises a first antenna and the wireless communication circuit in the passive drive circuit comprises a second antenna, the first antenna and the second antenna being spaced apart from each other in the housing.

10. The mobile phone housing of claim 8, wherein the antenna circuit in the passive driving circuit comprises a first antenna, the first antenna is used for transmitting energy with a transmitting antenna of the mobile phone, the housing is provided with a positioning part, the positioning part is arranged corresponding to the transmitting antenna of the mobile phone, and the first antenna is installed in the positioning part so that the first antenna is opposite to the transmitting antenna of the mobile phone.