CN200990600Y - Cell phone with cold starting function - Google Patents

Abstract

The utility model discloses a mobile phone with a cold start function, which includes a shell and a circuit part, wherein the circuit part includes a baseband processor CPU, an RF power supply circuit, and a power management chip for receiving SWITCH ON/OFF signals from the baseband processor CPU 1. Send the generated power supply start signal VBAT to the battery connection socket of the RF power supply circuit and the power management chip, the power button PWR connected to the baseband processor CPU and grounded, and a "cold start" button device, the "cold start" button The device is connected to the battery connection socket, and when the "cold start" button is pressed, the power supply start signal VBAT between the battery connection socket, the power management chip and the RF power supply circuit is cut off. Because the utility model controls the cold start of the mobile phone through a button device, thereby avoiding that when the mobile phone "crashes", the battery back cover of the mobile phone is uncovered to restart the mobile phone. Restart the mobile phone directly by pressing the button, which is convenient and fast to use.

Description

mobile phone with cold boot

【Technical field】

The utility model relates to a mobile phone, in particular to a mobile phone with a cold start function.

【Background technique】

At present, the performance of mobile phones has been greatly improved, such as: the speed of the processor is getting faster and faster, the memory is getting bigger and bigger, etc., so that there are more and more additional functional applications on the mobile phone. Various new functions such as multimedia, document processing, and various data transmissions make mobile phones evolve to PCs. However, the improvement of mobile phone processing capabilities and the increasingly complex mobile phone software will lead to unstable work and uncertain failures. It is getting bigger and bigger, and the mobile phones of many manufacturers have "crashed" phenomenon of not working from time to time like PCs.

Please refer to Fig. 1 for the operating principle of the existing mobile phone circuit, which includes a baseband processor CPU, which generates a high-level keyboard scan line scan signal ROW when the mobile phone is in an open state, and the baseband processor CPU The diode D1 is sequentially connected to the resistor R1 and the power button PWR, and grounded. When the power button PWR is pressed, the diode D1 is turned on, so that the keyboard scanning row scan signal ROW changes from high level to low level after passing through the loop formed by the power button PWR and the resistor R1. The baseband processor CPU judges whether it is a shutdown action or an on-hook action according to the length of time that the keyboard scanning line scan signal ROW lasts at a low level. If the keyboard scan row scan signal ROW lasts for a long time at low level, then the baseband processor CPU judges that it is a shutdown action and outputs the SWITCH OFF signal. If the keyboard scan row scan signal ROW lasts for a short time at low level, then the baseband processor CPU If it is judged to be an on-hook action, then output a SWITCH ON signal. The SWITCH ON/OF signal is sent to the power management chip to control the switch of the power management IC and other circuits. If the signal sent to the power management chip is a SWITCH OFF signal, the power management chip shuts down circuits such as the power management IC and stops working according to the received signal, thereby turning off the entire mobile phone. If the signal sent to the power management chip is a SWITCH ON signal, the power management chip will maintain the working state of the power management IC according to the received signal. The circuit also includes a battery connection socket, the power supply start signal VBAT generated by it is sent to the RF power supply circuit, power management chip

And the resistor R2 is sequentially connected to the resistor R1 and the power button PWR and grounded. A mobile phone with such a circuit can meet the requirements of high performance and high storage capacity. However, when the mobile phone does not work, the mobile phone of this circuit will restart the mobile phone by opening the battery to cut off the power, which will bring trouble to the user. It is not convenient and easy on the model.

【Content of utility model】

The technical problem to be solved by the utility model is to provide a mobile phone with a cold start function, so that the mobile phone can be restarted directly through the "cold start" button without opening the battery back cover of the mobile phone when the mobile phone "crashes".

In order to solve the above technical problems, the technical solution adopted by the utility model is: provide a mobile phone with a cold start function, which includes a housing and a circuit part, wherein the circuit part includes a baseband processor CPU, an RF power supply circuit, a baseband processing The power management chip that the processor CPU receives the SWITC HON/OFF signal, sends the generated power supply start signal VBAT to the RF power supply circuit and the battery connection socket of the power management chip, and the power button PWR that is connected to the baseband processor CPU and grounded , the circuit part also includes a "cold start" button device, the "cold start" button device is connected to the battery connection seat, and when the "cold start" button device is pressed, the battery connection is cut off. The power supply start signal VBAT between the socket and the power management chip and the RF power circuit.

The button device includes a diode D2, a resistor R4, a resistor R5, a resistor R6, and a capacitor C1. The battery connection seat is connected to the diode D2 and the resistor R4 in turn, and the other end of the resistor R4 is connected to the RC composed of the capacitor C1 and the resistor R5. The circuit is connected and grounded, the other end of the resistor R4 is connected to one end of the grounding resistor R6 at the same time, and the other end of R6 is grounded, and the battery connection seat provides a power supply start signal VBAT to the RF power supply circuit and the battery through the diode D2 and the resistor R4 Manage chips.

The diode D2 is a germanium type diode with a relatively low conduction voltage.

The resistor R5 is much larger than the resistor R6, the resistor R6 is much larger than the resistors R2 and R4, the resistor R4 is much larger than the resistor R2, and the resistor R2 is much larger than the resistor R1.

The capacitance C1 is more than 100UF, the resistance R5 is more than 100K ohms, the resistance R4 is more than 100 ohms, and the resistance R6 is more than 10K ohms.

The key device includes a mechanical switch, the mechanical switch is connected between the battery connection seat and the power supply start signal VBAT, and a special "cold start" key is set on the shell of the mobile phone, which is connected with the mechanical switch. connected.

Compared with the prior art, the utility model has the following beneficial effects: Since the utility model controls the cold start of the mobile phone through a button, when the mobile phone does not work and "crashes", you only need to press the "cold start" button. " button, you don't need to open the back cover of the phone to restart the phone, which is convenient and fast to use.

【Description of drawings】

Fig. 1 is the power supply schematic diagram of the battery in the existing mobile phone and the whole machine;

Fig. 2 is the battery in the mobile phone of the present invention and the power supply principle diagram of complete machine.

【Detailed ways】

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figure 2, it is a preferred embodiment of the present utility model.

It includes a shell and a circuit part, where the circuit part includes the baseband processor CPU, the power management chip that receives the SWITCH ON/OFF signal from the baseband processor CPU, the battery connector that generates the power supply start signal VBAT, the RF power supply circuit, and the power button Wait for the original circuit of the mobile phone, and a "cold start" button device, through which the battery switch is controlled to realize the cold start of the mobile phone.

The "cold start" button device includes a diode D2, a resistor R4, a resistor R5, a resistor R6, and a capacitor C1. The battery connection seat is connected to the diode D2 and the resistor R4 in turn, and the other end of the resistor R4 is connected to the capacitor C1, the resistor The RC circuit composed of R5 is connected and grounded, the other end of the resistor R4 is connected to one end of the grounding resistor R6 at the same time, and the other end of R6 is grounded, and the battery connection seat provides a power supply start signal VBAT to RF through the diode D2 and the resistor R4 Power circuit and power management chip.

As shown in Figure 2, the working principle of the cold start circuit of the mobile phone is that in static state, the RC circuit composed of capacitor C1 and resistor R5 is in a fully charged state, so the RC circuit is not conducting in static state. When the mobile phone is "deadlocked", press and hold the power button for a long time, and the power level of the power button will be converted to a low level, so that the capacitor C1, resistor R5, resistor R2, and resistor R1 form an RC discharge circuit, and the voltage at the upper end of C1 passes through this The capacitance of the RC discharge circuit is discharged and gradually reduced to below 10% of the battery voltage. At this time, all mobile phone circuits will not work because the power supply voltage is too low. Although a very low voltage is added to some circuits of the mobile phone, all The function of the circuit is lost, and the state will be similar to unplugging the battery, and there is no screen display. At this point, the user can release the power button PWR.

In order to make the newly added circuit part basically not affect the working mechanism of the original mobile phone circuit, the resistance relationship between the resistors in the circuit is that the resistor R5 is much larger than the resistor R6, the resistor R6 is much larger than the resistor R2 and the resistor R4, and the resistor R4 is far larger As for the resistor R2, the resistor R2 is much larger than the resistor R1, the diode D2 uses a germanium diode with a lower turn-on voltage, and the resistor R4 uses a resistor with a smaller resistance, generally 100 ohms. Since the decreasing speed of the voltage at the upper end of C1 is closely related to the discharge time constant of the RC circuit composed of capacitor C1 and resistor R5, in order to ensure that the time constant of the RC charging and discharging circuit composed of capacitor C1 and resistor R5 is above several seconds, the The capacitor C1 is above 100UF, and the resistor R5 is above 100K ohm. Resistor R6 is mainly used to adjust the discharge constant of the RC circuit and at the same time generate a small reactive current, so resistor R6 uses a resistor with a large resistance, generally more than 10K ohms. When the RC circuit composed of capacitor C1 and resistor R5 is discharged, the diode D2 plays the role of reversely blocking the initial power supply signal VBAT sent from the battery connector to the RF power circuit and power management chip.

In this preferred embodiment, some circuits are added on the basis of the existing mobile phone circuits to control the cold start button of the mobile phone, and the cold start button is the same button as the power button.

In another embodiment of the present invention, a mechanical switch is set between the battery connection seat, the RF power supply circuit and the power management chip, and a special cold start button is set on the shell of the mobile phone. The button is independent of the power-on button. The cold start button is connected to the mechanical switch. Press the cold start button to cut off the power supply start signal VBAT sent to the RF power supply circuit and the power management chip by the battery connection seat, thereby causing the mobile phone to Powering off all the circuits once is equivalent to uncovering the battery of the mobile phone, so that the newly added button does not affect the working mechanism of the original mobile phone circuit while playing the role of power-off reset.

Claims (5)

1, a kind of mobile phone with the cold start-up function, it comprises housing and circuit part, wherein circuit part comprises baseband processor CPU, the RF power circuit, receive the power management chip of SWITCH ON/OFF signal from described baseband processor CPU, the power supply initial signal VBAT that produces is delivered to the battery Connection Block of described RF power circuit and described power management chip, and be connected with described baseband processor CPU and the start key of ground connection, it is characterized in that, described circuit part also comprises one " cold start-up " key device, described " cold start-up " key device is connected with described battery Connection Block, when pressing described " cold start-up " key device, cut off the power supply initial signal VBAT between described battery Connection Block and described power management chip and the RF power circuit.

2, the mobile phone of band cold start-up function as claimed in claim 1, it is characterized in that, described key device comprises diode D2, resistance R 4, resistance R 5, resistance R 6 and capacitor C 1, described battery Connection Block connects diode D2 successively, resistance R 4, the other end of described resistance R 4 with by capacitor C 1, the RC circuit that resistance R 5 is formed is connected, and ground connection, the other end of resistance R 4 is connected to an end of resistance R 6 simultaneously, the other end ground connection of R6, described battery Connection Block is by diode D2, resistance R 4 provides power supply initial signal VBAT to RF power circuit and battery management chip.

3, the mobile phone of band cold start-up function as claimed in claim 2 is characterized in that, described diode D2 is the lower germanium type diode of conducting voltage.

4, the mobile phone of band cold start-up function as claimed in claim 2 is characterized in that, described capacitor C 1 is more than the 100UF, and resistance R 5 is more than 100K ohm, and resistance R 4 is more than 100 ohm, and resistance R 6 is more than 10K ohm.

5, the mobile phone of band cold start-up function as claimed in claim 1, it is characterized in that, described key device comprises a mechanical switch, described mechanical switch is connected between battery Connection Block and the power supply initial signal VBAT, one special cold start-up button is set on the housing of described mobile phone, and mechanical switch is connected therewith.

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