CN218679133U

CN218679133U - Double-screen mobile phone motherboard

Info

Publication number: CN218679133U
Application number: CN202320279709.4U
Authority: CN
Inventors: 程鹏
Original assignee: Sichuan Kusai Technology Co ltd
Current assignee: Sichuan Kusai Technology Co ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-03-21
Anticipated expiration: 2033-02-22

Abstract

The utility model discloses a double-screen mobile phone mainboard, including main control CPU, power PMU, main screen link joint and auxiliary screen link joint, power PMU respectively with main control CPU, main screen link joint, auxiliary screen link joint are connected, main control CPU through main screen control circuit with main screen link joint, main control CPU through auxiliary screen control circuit with auxiliary screen link joint is connected; the main screen linking seat is connected with a main display screen through a main screen switching FPC, and the auxiliary screen linking seat is connected with an auxiliary display screen through an auxiliary screen switching FPC; the main screen control circuit comprises an MIPI signal interface, and the auxiliary screen control circuit comprises an SPI interface which directly transmits data with the auxiliary display screen. The utility model discloses a master control CPU adopts the SPI interface to realize direct transmission data and gives vice display screen, is applicable to all platforms to through selecting low-cost TFT-LCD display screen, satisfy ordinary user's demand.

Description

Double-screen mobile phone motherboard

Technical Field

The utility model relates to a mobile phone display technical field especially relates to a double screen mobile phone motherboard.

Background

With the development of communication equipment technology, especially the rapid development of the mobile phone industry, mobile phones have become essential communication equipment in daily life, and the requirements of people on mobile phones are gradually increasing, an early flip phone function machine comprises two display screens, a main display screen and a secondary display screen are respectively arranged inside and outside a flip face of a smart phone, a common smart phone only has one display screen, all application functions are realized on the display screen, and all operations are carried out on the display screen, so that the use of the main display functions of the mobile phone is influenced.

The intelligent machine on the market has the double-screen multifunction, and the two touch display screens are mutually independent, so that the two touch display screens can be mutually switched for use, but the endurance of the machine is greatly influenced. Recently, due to the appearance of an electronic ink screen, a main screen and an auxiliary screen of a smart phone appear, all application functions are realized and operated on the main screen, the auxiliary screen is used for displaying information such as time, electric quantity capacity and signal intensity, the electronic ink screen has the characteristic of low power consumption, the problems of picture flicker and blue light do not exist, the power consumption of a front screen is greatly reduced, and the cruising ability of the smart phone is improved.

Disclosure of Invention

An object of the utility model is to overcome the problem that low-end platform does not support the double screen among the prior art, a double screen mobile phone motherboard is provided.

The purpose of the utility model is realized through the following technical scheme:

the main control CPU is connected with the main screen link seat through a main screen control circuit, and is connected with the auxiliary screen link seat through an auxiliary screen control circuit; the main screen linking seat is connected with a main display screen through a main screen switching FPC, and the auxiliary screen linking seat is connected with an auxiliary display screen through an auxiliary screen switching FPC;

the main screen control circuit comprises an MIPI signal interface, the auxiliary screen control circuit comprises an SPI interface which directly transmits data with the auxiliary display screen, and the auxiliary display screen is a TFT-LCD display screen.

As a preferred item, the type of the auxiliary screen link base is OK-23GF024-04.

As a preferred item, the secondary screen control circuit includes a transistor, and the main control CPU is connected to the secondary screen link base through the transistor.

As a preferred option, the type of the transistor is SSM3K35MFV.

As a preferred option, the secondary screen control circuit includes a voltage stabilizer, and the main control CPU is connected to the secondary screen link base through the voltage stabilizer.

As a preferred item, the model of the voltage stabilizer is SGM2031-3.3yudh4g/TR.

As a preferred item, the model of the main screen link base is OK-14F030-04.

As a preferred option, the SPI interface is an SPI 3 line or 4 line interface.

As a preferred item, the main display screen is disposed on the front side of the mobile phone motherboard, and the secondary display screen is disposed on the back side of the mobile phone motherboard.

As a preferred item, the auxiliary screen control circuit further includes a GPIO interface, and the main control CPU is connected to the voltage regulator through the GPIO interface.

As a preferred item, the main screen control circuit further includes a reset unit, a Touch Panel interface, and a synchronization signal transmission unit.

It should be further noted that the technical features corresponding to the above options can be combined with each other or replaced to form a new technical solution without conflict.

Compared with the prior art, the utility model discloses beneficial effect is:

(1) The utility model discloses a master control CPU adopts the SPI interface to realize that direct transmission data gives vice display screen, is applicable to all platforms, satisfies the use of low side platform to through selecting low-cost TFT-LCD display screen, satisfy ordinary user's demand.

(2) In one example, the auxiliary screen control circuit comprises a transistor, the main control CPU is connected with the auxiliary screen link base through the transistor, and backlight negative voltage is provided for the auxiliary display screen through the transistor.

(3) In one example, the main control CPU is connected with the secondary screen link socket through a voltage stabilizer to provide stable backlight positive voltage for the secondary display screen.

(4) In one example, the main display screen is arranged on the front side of the mobile phone main board, the auxiliary display screen is arranged on the back side of the mobile phone main board, the occupation ratio of the main display screen of the mobile phone is improved, the idle space on the back side is reasonably utilized, and meanwhile, the auxiliary display screen is arranged on the back side, so that the self-shooting function of the main camera can be realized.

Drawings

Fig. 1 is a schematic structural diagram of a dual-screen mobile phone motherboard according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating a connection between a mobile phone motherboard and a display screen according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a connection between a secondary screen linking seat and a mobile phone motherboard according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a transistor according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a connection between a voltage stabilizer and a secondary screen linking base according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating a connection between a main screen link base and a mobile phone motherboard according to an embodiment of the present invention;

fig. 7 is a schematic diagram of the connection between the MIPI signal interface and the main screen link socket shown in the embodiment of the present invention.

The reference numbers in the figures illustrate: 1. a main display screen; 2. a secondary display screen; 3. a mobile phone mainboard; 31. a main control CPU; 32. a main screen linking seat; 33. a secondary screen linking seat; 34. a power supply PMU; 4. the main screen is connected with an FPC in a switching mode; 5. the auxiliary screen is connected with an FPC in a switching mode; 6. a main screen control circuit; 7. and a secondary screen control circuit.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

In an exemplary embodiment, a dual-screen mobile phone motherboard is provided, as shown in fig. 1-2, including a main control CPU31, a power PMU34, a main screen link base 32, and an auxiliary screen link base 33, where the power PMU34 is connected to the main control CPU31, the main screen link base 32, and the auxiliary screen link base 33, the main control CPU31 is connected to the main screen link base 32 through a main screen control circuit 6, and the main control CPU31 is connected to the auxiliary screen link base 33 through an auxiliary screen control circuit 7; the main screen linking seat 32 is connected with a main display screen 1 through a main screen transfer FPC4, and the auxiliary screen linking seat 33 is connected with an auxiliary display screen 2 through an auxiliary screen transfer FPC 5;

the main screen control circuit 6 comprises an MIPI signal interface, the auxiliary screen control circuit 7 comprises an SPI interface which directly transmits data with the auxiliary display screen 2, and the auxiliary display screen 2 is a TFT-LCD display screen.

In particular, the SPI interface is a synchronous serial peripheral interface that enables the MCU to communicate with various peripherals in a serial manner to exchange information. The main control chip of the mobile phone generally has more than 4 groups of SPI interfaces for realizing the functions of fingerprints, gyroscopes, gravity sensors, touch panels and the like; the low-end platforms such as the exhibition T310, T610, MTK platforms MT6765, MT6769 and the like only have one group of display interfaces DSI, and the platform software architecture has no double-screen related codes, and the double-screen function cannot be realized by depending on the existing codes of the platforms. Generally increase outside single chip module on the market and realize, the platform carries out the demonstration that the communication realized the auxiliary screen through serial ports and singlechip, and the auxiliary screen function is realized to the SPI interface that this scheme adopted the platform to use commonly, and main control CPU31 adopts the SPI interface to realize direct transmission data and gives auxiliary display screen 2, is applicable to all platforms, satisfies the use of low end platform to through selecting low-cost TFT-LCD display screen, satisfy ordinary user's demand.

The MIPI signal interface aims to standardize interfaces inside the mobile phone, such as a camera, a display screen interface, a radio frequency/baseband interface and the like, so that the complexity of the design of the mobile phone is reduced and the design flexibility is increased. A series of internal interface standards of the mobile phone are respectively defined, such as a camera interface CSI, a display interface DSI, a radio frequency interface DigRF, a microphone/speaker interface SLIMbus, and the like. Different chips and modules can be flexibly selected from the market according to requirements, and design and functions can be changed more quickly and conveniently. In this application, mainboard 3 still includes radio frequency module, audio module, fingerprint, light sense and other sensors etc. all is connected with mainboard 3 through MIPI signal interface.

Referring to fig. 3-4, the secondary screen link 33 is of the type OK-23GF024-04. The auxiliary screen control circuit 7 comprises a transistor, and the main control CPU31 is connected with the auxiliary screen link base 33 through the transistor. The model of the transistor is SSM3K35MFV. The negative electrode voltage of the backlight lamp is provided for the auxiliary display screen through the transistor.

Referring to fig. 5, the secondary screen control circuit 7 includes a voltage regulator, and the main control CPU31 is connected to the secondary screen link base 33 through the voltage regulator. The model of stabiliser is SGM2031-3.3YUDH4G/TR, provides stable operating voltage for vice display screen 2, specifically, and mobile phone motherboard 3 provides 3.3V power for vice display screen 2. Further, the auxiliary screen control circuit 7 further includes a GPIO interface, and the main control CPU31 is connected to the voltage regulator through the GPIO interface. Specifically, the main control CPU31 controls the voltage stabilizer and the positive and negative electrodes of the backlight of the secondary display screen 2 directly through the GPIO interface, and the main control CPU31 controls the voltage stabilizer to directly supply the working voltage of the secondary display screen 2 through the GPIO interface, so as to provide a stable voltage of the positive electrode of the backlight for the secondary display screen 2. The main control CPU31 directly supplies RST reset signal, DCX (send data or control command), training effect synchronization signal, touch Panel interface (I2C, reset, interrupt), and the like of the sub display 2 through the GPIO interface. The SPI _ MOSI, SPI _ CS and SPI _ CLK of the SPI interface in the main control CPU31 are directly supplied to the secondary display screen data, CLK and CS. The auxiliary display screen 2 can display information such as date, time, electric quantity and incoming call prompt, and can realize functions of answering and playing MP3 and the like by a telephone with a TP interface.

In another example, a dual-screen handset motherboard is provided, and referring to fig. 6-7, the main screen link socket 32 is model number OK-14F030-04.

Further, the SPI interface is an

SPI

3 or 4 line interface, and the master CPU31 performs data transmission with the secondary display screen 2 by using the

SPI

3 or 4 line.

In another example, a dual-screen mobile phone motherboard is provided, the main display screen 1 is disposed on the front side of the mobile phone motherboard 3, and the secondary display screen 2 is disposed on the back side of the mobile phone motherboard 3, so that the occupation ratio of the main display screen of the mobile phone is improved, the idle space on the back side is reasonably utilized, and meanwhile, the secondary display screen 2 is disposed on the back side, so that the self-shooting function of the main camera can be realized.

In another example, a dual-screen mobile phone motherboard is provided, the main screen control circuit 6 further includes a reset unit and a synchronization signal transmission unit, wherein the reset unit is configured to transmit an RST reset signal, the synchronization signal transmission unit is configured to transmit a Tearing effect synchronization signal, and the Touch Panel interface (I2C, reset, interrupt) is further included to implement data transmission and control on the main screen 1.

The above detailed description is the detailed description of the present invention, and it can not be considered that the detailed description of the present invention is limited to these descriptions, and to the ordinary skilled person in the art to which the present invention belongs, without departing from the concept of the present invention, a plurality of simple deductions and replacements can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A double-screen mobile phone mainboard is characterized by comprising a main control CPU, a power supply PMU, a main screen link base and an auxiliary screen link base, wherein the power supply PMU is respectively connected with the main control CPU, the main screen link base and the auxiliary screen link base; the main screen linking seat is connected with a main display screen through a main screen switching FPC, and the auxiliary screen linking seat is connected with an auxiliary display screen through an auxiliary screen switching FPC;

2. The motherboard of claim 1, wherein the secondary screen connection seat is of type OK-23GF024-04.

3. The motherboard of claim 2, wherein the secondary screen control circuit comprises a transistor, and the main control CPU is connected to the secondary screen link socket via the transistor.

4. The motherboard of claim 3, wherein the transistor is of the type SSM3K35MFV.

5. The motherboard of claim 1, wherein the secondary screen control circuit comprises a voltage regulator, and the main control CPU is connected to the secondary screen link socket through the voltage regulator.

6. The motherboard of claim 5, wherein the voltage regulator is of the type SGM2031-3.3YUDH4G/TR.

7. The motherboard of claim 1, wherein the model of the main screen link socket is OK-14F030-04.

8. The motherboard of claim 1, wherein the SPI interface is an SPI 3 or 4 wire interface.

9. The motherboard of claim 5, wherein the secondary screen control circuit further comprises a GPIO interface, and the main control CPU is connected with the voltage stabilizer through the GPIO interface.

10. The motherboard of claim 1, wherein the main screen control circuit further comprises a reset unit, a Touch Panel interface and a synchronization signal transmission unit.