CN106557148A

CN106557148A - A kind of interface circuit, display driver, terminal device and display control method

Info

Publication number: CN106557148A
Application number: CN201510639632.7A
Authority: CN
Inventors: 谭胤; 王希林; 席毅
Original assignee: Huawei Device Dongguan Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2015-09-28
Filing date: 2015-09-28
Publication date: 2017-04-05
Anticipated expiration: 2035-09-28
Also published as: CN106557148B; CN110456900A; CN110456900B

Abstract

The embodiment of the invention discloses interface circuit, the interface circuit includes second interface, the first reading unit, the second reading unit and the control module of the first interface being connected with CPU and the connection of the first coprocessor；First reading unit reads the image data group of the CPU that first interface is received for the host-host protocol according to CPU；Second reading unit reads the image data group of the first coprocessor that second interface is received for the host-host protocol according to the first coprocessor；Control module is turned on and off data-transformation facility for the instruction control first interface sent according to CPU or the first coprocessor, and/or, for turning off or on data-transformation facility according to instruction control second interface, so that the image data group using CPU or the first coprocessor is shown.The embodiment of the invention also discloses display driver, terminal device and display control method, realize the first coprocessor for CPU and share the purpose for showing power consumption.

Description

A kind of interface circuit, display driver, terminal device and display control method

Technical field

The present invention relates to display field, more particularly to a kind of interface circuit, display driver, terminal set Standby and display control method.

Background technology

With the fast development of science and technology, smart electronicses product emerges in an endless stream, and such as mobile phone, intelligence wearing set It is standby etc..In order to realize complex function, this smart electronicses product is typically arranged with CPU (Central Processing Unit, central processing unit), CPU and communication system, alignment system, sensing Device etc. connects, by running high level operating system, such as IOS, Android Wear etc., through complicated fortune Calculate, form user interface and export on the display screen of smart electronicses product, with to user's exhibition information, Even interaction is formed with user.

In order to reduce the power consumption of CPU, prior art using the relatively low coprocessor of power consumption (such as MCU, DSP etc.) coprocessor assists CPU to complete some simple functions, for example it is responsible for receiving the inspection of sensor Data are surveyed, and CPU is sent to after the detection data of sensor is carried out simply processing further located Reason.With the progress of science and technology, some coprocessors also have display data processing unit, can process figure As display data, it is possible to drive the display for carrying out some simple images on the display screen by showing, Without the participation of CPU.But show described in prior art that driving can only be supported to be input into all the way, because This these coprocessor with process image data function cannot share the power consumption of display for CPU.

The content of the invention

In order to solve above-mentioned technical problem, embodiments provide a kind of interface circuit, show driving Device and display control method, realize coprocessor for CPU and share the purpose for showing power consumption.

In a first aspect, embodiments providing a kind of interface circuit, the interface circuit is applied to show Show driver, the interface circuit includes that first interface, second interface, the first reading unit, second are read Take unit and control module；

The first interface is connected with CPU, and the second interface is connected with the first coprocessor；Described One reading unit and first interface connection, second reading unit and second interface connection； The control module is connected with the first interface and the second interface respectively；

First reading unit, reads the first interface for the host-host protocol according to the CPU and connects The image data group from the CPU received；

Second reading unit, reads described for the host-host protocol according to first coprocessor The image data group from first coprocessor of two interfaces；

The control module, for the instruction control sent according to first coprocessors of the CPU or described The first interface is turned on and off data-transformation facility, and/or, for according to the CPU or described The instruction that one coprocessor sends controls the second interface and turns off or on data-transformation facility, with facility Shown with the image data group of the image data group or first coprocessor of the CPU Show.

In the first possible implementation of first aspect, the control module specifically for：

If display pattern is CPU display patterns, and the data-transformation facility of the first interface is closing shape State, then control the first interface according to the instruction that first coprocessors of the CPU or described send and open Data-transformation facility；

If display pattern is CPU display patterns, and the data-transformation facility of the second interface is unlatching shape State, then control the second interface according to the instruction that first coprocessors of the CPU or described send and close Data-transformation facility.

In second possible implementation of first aspect, the control module specifically for：

If display pattern is the first coprocessor display pattern, and the data-transformation facility of the second interface For closed mode, then the instruction control described second for being sent according to first coprocessors of the CPU or described Interface turn-on data transfer function；

If display pattern is the first coprocessor display pattern, and the data-transformation facility of the first interface For opening, then the instruction control described first for being sent according to first coprocessors of the CPU or described Interface closes data-transformation facility.

In the third possible implementation of first aspect, the control module specifically for：

If system charge is less than or equal to threshold value, and the first interface is opening, then according to described The instruction that first coprocessors of CPU or described send controls the first interface and closes data-transformation facility.

In the 4th kind of possible implementation of first aspect, the interface circuit also includes the 3rd interface With the 3rd reading unit, the 3rd interface is connected with the second coprocessor, the 3rd reading unit with The 3rd interface connection；

3rd reading unit, reads described for the host-host protocol according to second coprocessor The image data group from second coprocessor of three interfaces；

The control module, is additionally operable to the instruction control sent according to first coprocessors of the CPU or described Make the 3rd interface and be turned on and off data-transformation facility.

Second aspect, embodiments provides a kind of display driver, and the display driver includes Interface circuit and view data synthesis module, the interface circuit include first interface, second interface, One reading unit and the second reading unit；The first interface is connected with CPU, the second interface and the One coprocessor connects, and first reading unit is connected with the first interface, and described second reads list It is first to be connected with the second interface, first reading unit and second reading unit respectively with it is described View data synthesis module connects；

Described image Data Synthesis module, the figure of the CPU for first reading unit is read As the image data group of first coprocessor that display data group or the second reading unit read, Image data group corresponding with the image that display screen shows is synthesized, to utilize after synthesis Image data group is shown.

In the first possible implementation of second aspect, it is described that first reading unit reads The image of first coprocessor that the image data group of CPU or second reading unit read Display data group referred to as replaces image data group, the figure corresponding with display screen shows image As display data group is referred to as being replaced image data group；

Described image Data Synthesis module, specifically for：

The traversal pixel coordinate for replacing image data group, each pixel coordinate are schemed to there is replacement As display data, quilt corresponding with the pixel coordinate is searched from described being replaced in image data group Image data is replaced, the image data that is replaced is replaced with into the replacement image display number According to so as to after all pixels coordinate for replacing image data group is traveled through and finished, using replacing The image data group that is replaced after changing is shown.

With reference to the first possible implementation of second aspect and second aspect, in second possible reality In existing mode, described image Data Synthesis module is multiplexer or internal memory.

In the third possible implementation of second aspect, the display driver also includes that storage is single Unit and synthesis control unit, the memory cell are read with first reading unit and described second respectively Unit connects, and the synthesis control unit is connected with first coprocessors of the CPU or described, the figure As Data Synthesis module is connected with the synthesis control unit；

The memory cell, the image for storing the CPU that first reading unit reads show The image data group of first coprocessor that data group or second reading unit read, with Shown using the image of the image data group or first coprocessor of the CPU of the storage Data group is shown；

The synthesis control unit, for the control instruction according to first coprocessors of the CPU or described Forbidden energy described image Data Synthesis module.

In the 4th kind of possible implementation of second aspect, the interface circuit also includes the 3rd interface With the 3rd reading unit, the 3rd interface is connected with the second coprocessor, the 3rd reading unit with The 3rd interface connection；

Described image Data Synthesis module, specifically for the CPU for reading first reading unit Image data group, the image of first coprocessor that reads of second reading unit shows The image data group of second coprocessor that data group or the 3rd reading unit read, with The corresponding image data group of image that display screen shows is synthesized, to utilize the figure after synthesis As display data group is shown.

The third aspect, embodiments provides a kind of terminal device, the terminal device include CPU, First coprocessor and display driver, wherein, the display driver includes interface circuit, described Interface circuit includes first interface, second interface, the first reading unit, the second reading unit and control mould Block；

The first interface is connected with the CPU, and the second interface is connected with first coprocessor； First reading unit and first interface connection, second reading unit and the second interface Connection；The control module is connected with the first interface and the second interface respectively；

In the first possible implementation of the third aspect, the control module specifically for：

In second possible implementation of the third aspect, the control module specifically for：

In the third possible implementation of the third aspect, the control module specifically for：

In the 4th kind of possible implementation of the third aspect, the interface circuit also includes the 3rd interface With the 3rd reading unit, the 3rd interface is connected with the second coprocessor, the 3rd reading unit with The 3rd interface connection；

In the 5th kind of possible implementation of the third aspect, the terminal device is mobile terminal or can Wearable device.

Fourth aspect, the embodiment of the invention discloses another kind of terminal device, the terminal device includes CPU, the first coprocessor and display driver, the display driver include interface circuit and image Data Synthesis module, the interface circuit include first interface, second interface, the first reading unit and Two reading units；The first interface is connected with the CPU, at the second interface and first association Reason device connection, first reading unit is connected with the first interface, second reading unit and institute State second interface connection, first reading unit and second reading unit respectively with described image number Connect according to synthesis module；

In the first possible implementation of fourth aspect, it is described that first reading unit reads The image of first coprocessor that the image data group of CPU or second reading unit read Display data group referred to as replaces image data group, the figure corresponding with display screen shows image As display data group is referred to as being replaced image data group；

Described image Data Synthesis module, specifically for：

It is with reference to the first possible implementation of fourth aspect and fourth aspect, possible at second In implementation, described image Data Synthesis module is multiplexer or internal memory.

In the third possible implementation of fourth aspect, the display driver also includes that storage is single Unit and synthesis control unit, the memory cell are read with first reading unit and described second respectively Unit connects, and the synthesis control unit is connected with first coprocessors of the CPU or described, the figure As Data Synthesis module is connected with the synthesis control unit；

In the third possible implementation of fourth aspect, the interface circuit also includes the 3rd interface With the 3rd reading unit, the 3rd interface is connected with the second coprocessor, the 3rd reading unit with The 3rd interface connection；

In the 4th kind of possible implementation of fourth aspect, the terminal device is mobile terminal or can Wearable device.

In terms of 5th, the embodiment of the present invention also provides a kind of display control method, is applied to drive with display The terminal device of dynamic device, the display driver include interface circuit, and the interface circuit includes that first connects Mouth and second interface, methods described include：

The interface circuit is according to the host-host protocol reading first interface reception of the CPU from institute State the image data group of CPU；

The interface circuit reads the second interface according to the host-host protocol of first coprocessor and receives The image data group from first coprocessor；

Instruction control that the interface circuit is sent according to first coprocessors of the CPU or described described the One interface is turned on and off data-transformation facility, and/or, according to first coprocessors of the CPU or described The instruction of transmission controls the second interface and turns off or on data-transformation facility, so as to using the CPU Image data group or the image data group of first coprocessor shown.

In the first the possible implementation in terms of the 5th, the interface circuit according to the CPU or The instruction that first coprocessor sends controls the first interface and is turned on and off data-transformation facility, And/or, the instruction for being sent according to first coprocessors of the CPU or described controls the second interface Being turned on and off data-transformation facility includes：

If display pattern is CPU display patterns, and the data-transformation facility of the first interface is closing shape State, then the interface circuit is according to the instruction control that first coprocessors of the CPU or described send First interface opens the data-transformation facility of the first interface；

If display pattern is CPU display patterns, and the data-transformation facility of the second interface is unlatching shape State, then the interface circuit is according to the instruction control that first coprocessors of the CPU or described send Second interface closes the data-transformation facility of the second interface.

In second possible implementation in terms of the 5th, the interface circuit according to the CPU or The instruction that first coprocessor sends controls the first interface and is turned on and off data-transformation facility, And/or, the instruction for being sent according to first coprocessors of the CPU or described controls the second interface Being turned on and off data-transformation facility includes：

If display pattern is the first coprocessor display pattern, and the data-transformation facility of the second interface For closed mode, the then instruction that the interface circuit is sent according to first coprocessors of the CPU or described Control the second interface turn-on data transfer function；

If display pattern is the first coprocessor display pattern, and the data-transformation facility of the first interface For opening, the then instruction that the interface circuit is sent according to first coprocessors of the CPU or described Control the first interface and close data-transformation facility.

In the third the possible implementation in terms of the 5th, the interface circuit according to the CPU or The instruction that first coprocessor sends controls the first interface and is turned on and off data-transformation facility, And/or, the instruction for being sent according to first coprocessors of the CPU or described controls the second interface Being turned on and off data-transformation facility includes：

If system charge is less than or equal to threshold value, and the first interface is opening, then the interface Circuit controls the first interface according to the instruction that first coprocessors of the CPU or described send and closes number According to transfer function.

In the 4th kind of possible implementation in terms of the 5th, the interface circuit also includes the described 3rd Interface, methods described also include：

The interface circuit reads the 3rd interface according to the host-host protocol of second coprocessor The image data group from second coprocessor；

Instruction control that the interface circuit is sent according to first coprocessors of the CPU or described described the Three interfaces are turned on and off data-transformation facility.

In terms of 6th, the embodiment of the present invention also provides another display control method, methods described application In the terminal device with display driver, the display driver includes interface circuit, the interface electricity Road includes first interface and second interface, methods described includes：

The image data group of the CPU that the interface circuit is read by the display driver or institute The image data group of the first coprocessor is stated, image corresponding with the image that display screen shows shows Data group is synthesized, to be shown using the image data group after synthesis.

In the first the possible implementation in terms of the 6th, the CPU that the interface circuit reads Image data group or the image data group of first coprocessor referred to as replace image and show Data group, the image data group corresponding with display screen shows image are referred to as being replaced image Display data group；

The image data group of the CPU that the interface circuit is read by the display driver or institute The image data group of the first coprocessor is stated, image corresponding with the image that display screen shows shows Data group is synthesized, and is included to carry out display using the image data group after synthesis：

The display driver travels through the pixel coordinate for replacing image data group, and each pixel is sat Mark is searched and the picture from described being replaced in image data group to there is replacement image data Plain coordinate is corresponding to be replaced image data, by it is described be replaced image data replace with it is described Image data is replaced, to travel through in all pixels coordinate for replacing image data group After finishing, using replacement after the image data group that is replaced shown.

In second possible implementation in terms of the 6th, methods described also includes：

The display driver store the image data group of the CPU that the interface circuit reads or The image data group of first coprocessor, it is aobvious with the image of the CPU using the storage Show that data group or the image data group of first coprocessor are shown, and according to the CPU Or the control instruction forbidden energy described image Data Synthesis module of first coprocessor.

In the third the possible implementation in terms of the 6th, the interface circuit also includes the 3rd interface, Methods described also includes：

The image data group of the CPU that the interface circuit is read by the display driver, institute The image data group of the image data group or second coprocessor of the first coprocessor is stated, Image data group corresponding with the image that display screen shows is synthesized, to utilize after synthesis Image data group is shown.

By above-mentioned technical proposal as can be seen that the interface circuit of the present invention includes first interface and second interface, By the first reading unit according to the host-host protocol reading first interface reception of the CPU from institute State the image data group of CPU, host-host protocol of second reading unit according to first coprocessor The image data group from first coprocessor that the second interface is received is read, is realized The CPU and first coprocessor access the purpose of display driver simultaneously.And the control mould Root tuber controls the first interface according to the instruction that first coprocessors of the CPU or described send and opens or pass Data-transformation facility is closed, and/or, for the instruction sent according to first coprocessors of the CPU or described Control the second interface and turn off or on data-transformation facility, to be shown using the image of the CPU The image data group of data group or first coprocessor is shown so that described display drives Device is received in order from the CPU and the image data group from first coprocessor, is overcome The problem of the CPU and first coprocessor contention display control power, realizes first association Processor shares display power consumption purpose for the CPU.

In addition, in another technical thought of the present invention, the display driver is except including interface Circuit, also including view data synthesis module, described image Data Synthesis module reads single by described first First association that the image data group or the second reading unit of the CPU that unit reads read is processed The image data group of device, image data group corresponding with the image that display screen shows are closed Into to be shown using the image data group after synthesis, overcoming the CPU and described The problem of one coprocessor contention display control power, realizes first coprocessor for the CPU point Load shows power consumption purpose.

Description of the drawings

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality Apply accompanying drawing to be used needed for example or description of the prior art to be briefly described, it should be apparent that, below Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, Without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.

Fig. 1 is the hardware connection diagram of CPU, coprocessor and display control in prior art；

A kind of structured flowchart of interface circuit embodiment that Fig. 2 is provided for the present invention；

A kind of structured flowchart of another embodiment of interface circuit that Fig. 3 is provided for the present invention；

A kind of flow chart of display control method embodiment one that Fig. 4 is provided for the present invention；

A kind of structured flowchart of display driver embodiment that Fig. 5 is provided for the present invention；

The signal of display screen display content in a kind of display driver embodiment that Fig. 6 is provided for the present invention Figure；

A kind of structured flowchart of another embodiment of display driver that Fig. 7 is provided for the present invention；

A kind of structured flowchart of another embodiment of display driver that Fig. 8 is provided for the present invention；

A kind of flow chart of display control method embodiment two that Fig. 9 is provided for the present invention.

Specific embodiment

Coprocessor refer to assist CPU work processor, such as MCU (Microcontroller Unit, Microprocessor, also known as single-chip microcomputer), DSP (Digital Signal Processing, digital signal processor) Deng.Referring to Fig. 1, if in the case of in the electronic product of prior art, CPU and coprocessor are simultaneous, Generally shown by CPU controls and drive display image on the display screen, and coprocessor is then responsible for some letters Single function, for example, be responsible for receiving the detection data of sensor, and the detection data of sensor carried out letter CPU is sent to after single process to be further processed, to realize the purpose of power consumption is shared for the CPU. And with the development of science and technology, some coprocessors also have display data processing unit, can be by showing Driving carries out the display of some simple images, such as time, date, meter step etc. on the display screen, but It is that current display driving can only be supported to be input into all the way, or only supporting CPU inputs, or only supporting Coprocessor is exported, it is impossible to while supporting the input of CPU and coprocessor.Therefore, these have and show The coprocessor of data processing unit cannot enter CPU and share the work(for being shown driving display and being produced by control Consumption.

In order to solve above-mentioned technical problem, the embodiment of the present invention provides a kind of interface circuit, a kind of display and drives Dynamic device and a kind of display control method.

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clear, complete description, it is clear that described embodiment is only a part of embodiment of the invention, and It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing The every other embodiment obtained under the premise of going out creative work, belongs to the scope of protection of the invention.

Referring to Fig. 2, the figure is a kind of structured flowchart of interface circuit provided in an embodiment of the present invention.

Interface circuit provided in an embodiment of the present invention is applied to display driver, and the interface circuit includes One interface 11, second interface 12, the first reading unit 13 and the second reading unit 14 and control module 15.

The first interface 11 is connected with CPU21, the second interface 12 and the first coprocessor 22 Connection；First reading unit 13 and the first interface 11 connect, second reading unit 14 Connect with the second interface 12；The control module 15 respectively with the first interface 11 and described Two interfaces 12 connect.

First reading unit 13, reads described first for the host-host protocol according to the CPU21 and connects The image data groups from the CPU21 that mouth 11 is received.

In actual applications, support that the host-host protocol of the CPU21 transmission described image display data group has Many kinds, such as MIPI agreements etc., the present invention is not specifically limited.

Second reading unit 14, reads institute for the host-host protocol according to first coprocessor 22 State the image data group from first coprocessor 22 of the reception of second interface 12.

In actual applications, support that first coprocessor 22 transmits the biography of described image display data group Defeated agreement has many kinds, such as SPI protocol etc., and the present invention is also not specifically limited.

If the interface circuit only has the first interface 11, the second interface 12, described first to read Unit 13 and second reading unit 14, although realize display driver while connecting the CPU21 With the purpose of first coprocessor 22, but if the CPU21 and first coprocessor 22 During simultaneous transmission image data group, which interface the display driver cannot be determined on earth according to The image data group of transmission is being shown there is the CPU21 and first coprocessor The problem of 22 contention display control power.For example, first coprocessor 22 is responsible for monitor in real time user's Heart rate, and periodically image data group is sent to the second interface 12, so that user is real-time Solve oneself current heart rate.But, if user opens the application program of qq, the application program needs institute State CPU21 and be responsible for display, if the gap of image data group is transmitted in the CPU21, described second Interface 21 receives the image data with regard to heart rate from the transmission of the first coprocessor 22, and profit Shown with the image data group with regard to heart rate, then the picture of the display screen that user sees Ceaselessly will switch between qq pictures and heart rate picture, have a strong impact on the normal use of user.

In order to solve the technical problem, the interface circuit that the present embodiment is provided also includes the control module 15, Instruction for being sent according to first coprocessors of the CPU21 or described 22 controls the first interface 11 are turned on and off data-transformation facility, and/or, at according to first associations of the CPU21 or described The instruction that reason device 22 sends controls the second interface 12 and turns off or on data-transformation facility.

If being currently needed for being shown according to the image data group of CPU21, the CPU21 or institute State the first coprocessor 22 to the control module 15 send open first interface transfer function instruction and Close the instruction of second interface transfer function.The control module 15 is according to the unlatching first interface data The data-transformation facility of the first interface 11 is opened in the instruction of transfer function, so that the first interface 11 The image data group from the CPU21 can be received；And according to the closing second interface transmission The data-transformation facility of the second interface 12 is closed in the instruction of function, so that the second interface 12 is not Receive the image data group from first coprocessor 22.

If being currently needed for being shown according to the image data group of first coprocessor 22, institute State first coprocessors of CPU21 or described 22 unlatching second interface transmission is sent to the control module 15 The instruction of function and the instruction of closing first interface transfer function, the control module 15 is according to the unlatching The data-transformation facility of the second interface 12 is opened in the instruction of second interface data-transformation facility, so that institute State second interface 12 and can receive the image data group from first coprocessor 22；And root The data-transformation facility of the first interface 11 is closed according to the instruction for closing first interface transfer function, So that the first interface 11 does not receive the image data group from the CPU21.

The present embodiment by the first interface 11, the second interface 12, first reading unit 13, Second reading unit 14, realizes the CPU21 and first coprocessor 22 while accessing The purpose of display driver, and the display driver is received in order by the control module 15 From the CPU21 and the image data group from first coprocessor 22, institute is overcome The problem of CPU21 and first coprocessor 22 contention display control power is stated, described first is realized Coprocessor 22 shares display power consumption purpose for the CPU21.

In actual applications, can judge to need CPU21 to be responsible for showing or institute according to the instruction of user State the first coprocessor 22 and be responsible for display, such as when the instruction of the application program for receiving user's opening wechat, As the function of wechat is to be responsible for realization, therefore judged result to need the CPU21 to be responsible for by CPU21 Show, and command adapted thereto is sent to the control module 15, to be responsible for what is shown in the CPU21 During not by first coprocessor 22 grab display control power.Again for example, when CPU is received User exits the instruction of the application program of wechat, and system automatically restores to the display of desktop, due to desktop Display is that first coprocessor 22 is responsible for, therefore CPU21 is to first coprocessor 22 Desktop idsplay order is sent, so that first coprocessor 22 is responsible for showing desktop.The CPU21 or First coprocessor 22 sends command adapted thereto to the control module 15, to ensure described first Coprocessor 22 is not grabbed display control power by the CPU21 during being responsible for showing.

Specifically, if judging that display pattern is CPU display patterns according to the instruction of user, i.e., only by institute The display that CPU21 is responsible for display screen is stated, at this moment needs the display driver only to receive the CPU21 The image data group of transmission.In this case, if the data-transformation facility of the first interface 11 For closed mode, then the control module 15 is according to first coprocessors of the CPU21 or described 22 The instruction sent controls the data-transformation facility that the first interface 11 opens the first interface 11.If institute The data-transformation facility for stating second interface 12 is opening, then according to the CPU21 or described first The instruction that coprocessor 22 sends controls the data biography that the second interface 12 closes the second interface 12 Transmission function.

If judging that the display pattern is the first coprocessor display pattern according to the instruction of user, i.e., only The display of display screen is responsible for by first coprocessor 22, at this moment needs the display driver only to connect Receive the image data group that first coprocessor 22 sends.In this case, if described second The data-transformation facility of interface 12 is closed mode, then the control module 15 according to the CPU21 or The instruction that first coprocessor 22 sends controls the 12 turn-on data transfer function of second interface. If the data-transformation facility of the first interface 11 is opening, according to the CPU21 or described The instruction that first coprocessor 22 sends controls the first interface 11 and closes data-transformation facility.

In actual applications, can be so that the CPU21 and described be determined according to the height of system charge The display control power of one coprocessor 22.Specifically, it is if system charge is less than or equal to threshold value and described First interface 11 is opening, and in order to extend battery-powered time, then the control module is according to described The instruction that first coprocessors of CPU21 or described 22 send controls the first interface 11 and closes data biography Transmission function, i.e., deprive the display control power of the CPU21 of high power consumption by force.Certainly, in practical application scene In, before the display control for depriving the CPU21 by force is weighed, the license of user can be first solicited, In the case that user agrees to, then the transmission for interrupting the display image data group of the CPU21.Depriving While stating the display control power of CPU21, the data that can also open first coprocessor 22 are passed Transmission function, is responsible for the display of some simple functions by the first coprocessor 22 of low-power consumption, such as dial plate, Date, meter step, heart rate etc..

In actual applications, in order to further share power consumption for the CPU21, may be also in electronic product Another coprocessor, i.e. the second coprocessor 23 are set, and second coprocessor 23 can also be born Blame the display of some simple functions.Therefore, in another embodiment, referring to Fig. 3, the interface electricity Road also includes the 3rd interface 16 and the 3rd reading unit 17, at the 3rd interface 16 and second association Reason device 23 connects, and the 3rd reading unit 17 is connected with the 3rd interface 16.

3rd reading unit 17, reads institute for the host-host protocol according to second coprocessor 23 State the image data group from second coprocessor 23 of the reception of the 3rd interface 16.

The control module 15, is additionally operable to be sent according to first coprocessors of the CPU21 or described 22 Instruction control the 3rd interface 16 and be turned on and off data-transformation facility.

In this embodiment, when exist two coprocessors in the case of, with one of coprocessor ( In the present embodiment be first coprocessor 22) as main coprocessor, another coprocessor ( In the present embodiment be second coprocessor 23) supplemented by coprocessor, the unlatching of auxiliary coprocessor or pass The control instruction for closing data-transformation facility is controlled by the CPU21 or main coprocessors.Certainly in reality Using in, there are multiple feelings in the coprocessor in the possible many more than two of quantity of the coprocessor Under condition, its control principle is identical with the control principle of two coprocessors in the present embodiment, and here is no longer gone to live in the household of one's in-laws on getting married State.

Based on the above-mentioned embodiment with regard to interface circuit, the present invention also provides a kind of terminal device embodiment one, The terminal includes CPU, the first coprocessor and display driver, wherein, the display driver Including interface circuit, the interface circuit include first interface, second interface, the first reading unit, Two reading units and control module；

The control module, for the instruction control sent according to first coprocessors of the CPU or described The first interface is turned on and off data-transformation facility, and/or, for according to the CPU or described The instruction that one coprocessor sends controls the second interface and turns off or on data-transformation facility.

In this embodiment, the terminal device can be mobile phone, panel computer, PDA (Personal Digital Assistant, personal digital assistant), vehicle-mounted computer or wearable device etc..

The present embodiment is by the first interface, second interface, first reading unit, described Second reading unit, realizes the CPU and first coprocessor while accessing display driver Purpose, and by the control module cause the display driver receive in order from the CPU and From the image data group of first coprocessor, overcome at the CPU and first association The problem of reason device contention display control power, realizes first coprocessor and shares display for the CPU Power consumption purpose.

In the implementation of another possibility, the control module specifically for：

In actual applications, in order to further share power consumption for the CPU21, may be also in electronic product Another coprocessor, i.e. the second coprocessor are set.The interface circuit also include the 3rd interface and 3rd reading unit, the 3rd interface are connected with the second coprocessor, the 3rd reading unit and institute State the connection of the 3rd interface；

Based on above-mentioned with regard to interface circuit and the embodiment of the terminal device with the interface circuit, this Bright also to provide a kind of display control method embodiment one, referring to Fig. 4, methods described is applied to drive with display The terminal device of dynamic device, the display driver include interface circuit, and the interface circuit includes that first connects Mouth and second interface, methods described include：

Step S101：The interface circuit reads the first interface according to the host-host protocol of the CPU and connects The image data group from the CPU received；

Step S102：The interface circuit reads described the according to the host-host protocol of first coprocessor The image data group from first coprocessor of two interfaces；

Step S103：The instruction that the interface circuit is sent according to first coprocessors of the CPU or described Control the first interface and be turned on and off data-transformation facility, and/or, according to the CPU or described The instruction that one coprocessor sends controls the second interface and turns off or on data-transformation facility, with facility Shown with the image data group of the image data group or first coprocessor of the CPU Show.

The present embodiment reads the first interface according to the host-host protocol of the CPU by the interface circuit The image data group from the CPU for receiving, the interface circuit are processed according to first association The host-host protocol of device reads the image display number from first coprocessor that the second interface is received According to group, the CPU and first coprocessor are realized while accessing the purpose of display driver, and And by the interface circuit according to the instruction control that first coprocessors of the CPU or described send First interface is turned on and off data-transformation facility, and/or, processed according to first associations of the CPU or described The instruction that device sends controls the second interface and turns off or on data-transformation facility, described to utilize The image data group of the image data group of CPU or first coprocessor is shown, real Show the display driver to receive from the CPU and the image from first coprocessor in order Display data group, overcomes the problem of the CPU and first coprocessor contention display control power, Realize first coprocessor display power consumption purpose is shared for the CPU.

In another embodiment, the interface circuit is according to first coprocessors of the CPU or described The instruction of transmission controls the first interface and is turned on and off data-transformation facility, and/or, for according to institute The instruction control second interface for stating the transmission of first coprocessors of CPU or described is turned on and off data biography Transmission function includes：

In order to further share power consumption for the CPU, in another embodiment, the interface circuit Also include the 3rd interface, methods described also includes：

Above-described embodiment is to control module 15 by first coprocessors of the CPU21 or described 22 The data of the data-transformation facility or second interface 12 for being turned on and off the first interface 11 are sent to pass The control instruction of transmission function, to realize that display driver is received in order from the CPU21 and described first The image data group of coprocessor 22, so as to realize the CPU21 and first coprocessor 22 by the display of display drive control display screen.

Another display control scheme is provided below, referring to Fig. 5, the figure shows for one kind that the present invention is provided Show the schematic diagram of driver embodiment.

The display driver that the present embodiment is provided includes interface circuit 31 and view data synthesis module 32, institute Stating interface circuit includes that first interface 301, second interface 302, the first reading unit 303 and second read Unit 304；The first interface 301 is connected with CPU41, at the second interface 302 and the first association Reason device 42 connects, and first reading unit 303 is connected with the first interface 301, and described second reads Take unit 304 to be connected with the second interface 302, first reading unit 303 and described second is read Take unit 304 to be connected with described image Data Synthesis module 32 respectively.

First reading unit 303, reads described first for the host-host protocol according to the CPU41 The image data group from the CPU41 that interface 301 is received.

Second reading unit 304, reads for the host-host protocol according to first coprocessor 42 The image data group from first coprocessor 42 that the second interface 302 is received.

Described image Data Synthesis module 32, described in first reading unit 303 is read First coprocessor 42 that the image data group of CPU41 or the second reading unit 304 read Image data group, image data group corresponding with the image that display screen shows are synthesized, To be shown using the image data group after synthesis.

In the present embodiment, the image of the CPU41 that first reading unit 303 is read The image data of first coprocessor 42 that display data group or the second reading unit 304 read Group, image data group corresponding with the image that display screen shows carries out synthesis includes three kinds of situations：

The first：If CPU41 produces image data group, and sends it to the first interface 301, Transmit to described image Data Synthesis module 32 after reading via first reading unit 303, it is current aobvious Show that the image data group of the image of screen display is also closed from CPU41, therefore described image data Into the image that the image data group from the CPU41 is shown by module 32 with current display screen Display data group is synthesized.Such case is common in be responsible for control screen by CPU41 and shows, for example when User opens qq application programs, and interacts with the application program.

Second：If first coprocessor 42 produces image data group, and sends it to institute Second interface 302 is stated, is transmitted to described image synthesis module after reading via second reading unit 304 32, the image data group of the image that current display screen shows also derives from first coprocessor 42, therefore described image synthesis module 32 is by the image data from first coprocessor 42 The image data group that group is shown with current display screen is synthesized.Such case is common in by described First coprocessor 42 is responsible for control screen and is shown, for example in stand-by mode, first coprocessor 42 data displays that periodically sensor is detected on the display screen, such as speed per hour, heart rate etc., one As need not carry out interaction with user.

The third, in the CPU41 and first coprocessor 42, one of them is mainly responsible for control During screen display, another generates image data group, at this moment described image synthesis mould The image data group that the new image data group for producing is shown with current display screen is carried out by block 32 Synthesis.The essence of synthesis is the replacement of image data, and this replacement can be whole replacements, also may be used With partial replacement, therefore the CPU41 and first coprocessor 42 can be realized while control is aobvious The display of display screen curtain.For example, see Fig. 6, first coprocessor 42 is responsible for display dial, now CPU Prompting with regard to described information can be shown on the display screen by the fresh information of the wechat for receiving, CPU. As the display alarm need not be displayed in full screen, therefore only need to show the image in the region for needing to show Data group replaces with the image data group of described information prompting.Again for example, when user is passing through When wechat application program carries out man-machine interaction, can by first coprocessor 42 send with regard to speed per hour, The presentation of information such as heart rate are above or below screen.Or, it is when user is during running, described aobvious Display screen curtain is responsible for the current speed per hour of control display, heart rate etc. by first coprocessor 42 is main, if institute State CPU41 and detected note and produce, the note can be reminded by view data synthesis module 32 Image be displayed in above or below display screen, to remind user.If not needing the note to remind Image show always, then the image that first coprocessor 42 is pushed next time can be utilized to show number According to the synthesis of group and the image data group of display screen present image, by it is described show it is described short The image that letter is reminded replaces with the new images for not having the note to remind image.

The present embodiment is by the first interface 301, second interface 302, the first reading unit 303 and Two reading units 304 realize the CPU41 and first coprocessor 42 while accessing described aobvious Show the purpose of driver, also, the CPU21 is overcome by described image Data Synthesis module 32 The problem of display control power is fought for first coprocessor 22, first coprocessor 42 is realized Display power consumption purpose is shared for the CPU41.

The specific works original that described image Data Synthesis module 32 is combined into image data is described below Reason：

The image data group or described second of the CPU41 that first reading unit 303 reads The image data group of first coprocessor 42 that reading unit 304 reads referred to as is replaced image and is shown Show data group, the image data group corresponding with display screen shows image is referred to as being replaced figure As display data group；

Described image Data Synthesis module 32, specifically for：

It is understood that the method that above-mentioned image data is combined into does not constitute the limit to the present invention Fixed, those skilled in the art can be with according to actual conditions designed, designed.

In actual applications, the function of described image Data Synthesis module 32 can utilize multiplexer or internal memory Realize on hardware, the present invention is not specifically limited.

In another embodiment, referring to Fig. 7, the display driver also includes 33 He of memory cell Synthesis control unit 34, the memory cell 33 respectively with first reading unit 302 and described second Reading unit 304 connects, and the synthesis control unit 34 is processed with first associations of the CPU41 or described Device 42 connects, and described image Data Synthesis module 32 is connected with the synthesis control unit 34；

The memory cell 33, for storing the CPU41's of the reading of the first reading unit 302 The image of first coprocessor 42 that image data group or second reading unit 304 read Display data group, with the image data group of the CPU41 using the storage or first association The image data group of processor 42 is shown；

The synthesis control unit 34, for according to first coprocessors of the CPU41 or described 42 Control instruction forbidden energy described image Data Synthesis module 32.

In the above-mentioned three kinds of situations introduced to described image Data Synthesis module 32, first two situation can be with Need not carry out the synthesis of display image data group, but the institute by the first reading unit 302 is read State the first association process that the image data group or second reading unit 304 of CPU41 read The image data group of device 42 is stored in the memory cell 33, is stored in institute will pass through reading State image data group in memory cell 33 to be shown, in order to save due to carrying out figure The electricity expended as data are combined into.For example, if Current electronic product enters holding state, display screen Only need to show time and date on curtain, and the function is by the individually responsible display of first coprocessor 42. Now, first coprocessors of the CPU41 or described 42 send forbidden energy to the synthesis control unit 34 Instruction, the synthesis control unit 34 instruct forbidden energy described image Data Synthesis module 32 according to the forbidden energy, I.e. described image Data Synthesis module 32 quits work.Meanwhile, the second interface 302 receives described The image data group for carrying time and date that one coprocessor 42 sends, and described image is shown Show that data group is stored in the memory cell 33, so as to display driver driver module directly from Extract described image display data to be shown in the memory cell 33.

In addition, the memory cell can be deposited for NVRAM nonvolatile storages, DRAM dynamic randoms One of reservoir, SRAM SRAMs, Flash flash memories etc..

In another embodiment, referring to Fig. 8, the interface circuit 31 also includes the 3rd interface 305 With the 3rd reading unit 306, the 3rd interface 305 is connected with the second coprocessor 43, and the described 3rd Reading unit 306 is connected with the 3rd interface 305.

3rd reading unit 306, reads for the host-host protocol according to second coprocessor 43 The image data group from second coprocessor 43 that 3rd interface 305 is received；

Described image Data Synthesis module 32, specifically for the institute for reading first reading unit 303 State the image data group of CPU41, first association that second reading unit 304 reads is processed Second coprocessor 43 that the image data group of device 42 or the 3rd reading unit 306 read Image data group, image data group corresponding with the image that display screen shows synthesized, To be shown using the image data group after synthesis.

In this embodiment, when exist two coprocessors in the case of, with one of coprocessor ( In the present embodiment be first coprocessor 42) as main coprocessor, another coprocessor ( In the present embodiment be second coprocessor 43) supplemented by coprocessor, either main coprocessor is still Auxiliary coprocessor, the image data group that described image Data Synthesis module 32 can be sent to The corresponding image data group of image that display screen shows is synthesized, to realize that the auxiliary association is processed Device shares the purpose of power consumption for the CPU41.Certainly in actual applications, the quantity of the coprocessor Possible many more than two, the coprocessor exist it is multiple in the case of, its control principle and the present embodiment In two coprocessors control principle it is identical, will not be described here.

Based on the above-mentioned embodiment with regard to display driver, the present invention also provides a kind of terminal device embodiment Two, the terminal device includes CPU, the first coprocessor and display driver, and the display drives Device includes interface circuit and view data synthesis module, and the interface circuit includes that first interface, second connect Mouth, the first reading unit and the second reading unit；The first interface is connected with the CPU, and described Two interfaces are connected with first coprocessor, and first reading unit is connected with the first interface, Second reading unit is connected with the second interface, and first reading unit and described second reads Unit is connected with described image Data Synthesis module respectively；

In actual applications, the terminal device can be mobile phone, panel computer, PDA (Personal Digital Assistant, personal digital assistant), vehicle-mounted computer or wearable device etc..

The present embodiment is by the first interface, second interface, the first reading unit and the second reading unit The CPU and first coprocessor are realized while accessing the purpose of the display driver, also, The CPU is overcome by described image Data Synthesis module and the first coprocessor contention shows control The problem of system power, realizes first coprocessor for the CPU41 and shares display power consumption purpose.

The specific works original that described image Data Synthesis module is combined into image data is described below Reason：

The image data group of the CPU that first reading unit reads or second reading are single The image data group of first coprocessor that unit reads referred to as replaces image data group, institute State image data group corresponding with the image that display screen shows to be referred to as being replaced image data Group；

Described image Data Synthesis module, specifically for：

In actual applications, the function of described image Data Synthesis module can utilize multiplexer or internal memory etc. Hardware realizes that the present invention is not specifically limited.

In another embodiment, the display driver also includes memory cell and synthesis control unit, The memory cell is connected with first reading unit and second reading unit respectively, the synthesis Control unit is connected with first coprocessors of the CPU or described, described image Data Synthesis module and institute State synthesis control unit connection；

The memory cell can for NVRAM nonvolatile storages, DRAM dynamic RAMs, One of SRAM SRAMs, Flash flash memories etc..

In another embodiment, in order to further share power consumption, the interface circuit for the CPU Also include the 3rd interface and the 3rd reading unit, the 3rd interface is connected with the second coprocessor, described 3rd reading unit is connected with the 3rd interface；

Set based on the above-mentioned embodiment with regard to the display driver and the terminal with the display driver Standby embodiment two, the present invention also provide a kind of display control method embodiment two, and methods described is applied to tool There is the terminal device of display driver, the interface circuit includes first interface and second interface, referring to Fig. 9, Methods described includes：

Step S201：The interface circuit reads the first interface according to the host-host protocol of the CPU and connects The image data group from the CPU received；

Step S202：The interface circuit reads described the according to the host-host protocol of first coprocessor The image data group from first coprocessor of two interfaces；

Step S203：The image of the CPU that the interface circuit is read by the display driver shows The image data group of data group or first coprocessor, it is corresponding with the image that display screen shows Image data group synthesized, to be shown using the image data group after synthesis.

The present embodiment reads the first interface according to the host-host protocol of the CPU by the interface circuit Receive the image data group from the CPU, according to the host-host protocol of first coprocessor The image data group from first coprocessor for reading the second interface reception realizes institute CPU and first coprocessor are stated while accessing the purpose of the display driver.Also, by institute State the image data group or described first of the CPU that the interface circuit is read by display driver The image data group of coprocessor, image data group corresponding with the image that display screen shows Synthesized, to be shown using the image data group after synthesis, overcome the CPU and The problem of the first coprocessor contention display control power, it is described to realize first coprocessor CPU shares display power consumption purpose.

In another embodiment, the image data group of the CPU that the interface circuit reads Or the image data group of first coprocessor referred to as replaces image data group, it is described with it is aobvious Show that the corresponding image data group of image of screen display is referred to as being replaced image data group；

In another embodiment, then methods described also includes：

" first " of the first reading unit mentioned in the embodiment of the present invention is used only to do name mark, First sequentially is not represented.The rule is equally applicable to " second ".

One of ordinary skill in the art will appreciate that：Realize all or part of step of said method embodiment Can be completed by the related hardware of programmed instruction, foregoing routine can be stored in an embodied on computer readable In storage medium, the program upon execution, performs the step of including said method embodiment；And it is aforesaid Storage medium can be at least one in following media：Read-only storage (English：read-only Memory, abbreviation：ROM), RAM, magnetic disc or CD etc. are various can be with Jie of store program codes Matter.

It should be noted that each embodiment in this specification is described by the way of progressive, each Between embodiment, identical similar part is mutually referring to what each embodiment was stressed is and which The difference of his embodiment.For especially for equipment and system embodiment, due to its basic simlarity In embodiment of the method, so describe fairly simple, part explanation of the related part referring to embodiment of the method .Equipment described above and system embodiment are only schematic, wherein as separating component The unit of explanation can be or may not be physically separate, and the part shown as unit can be with It is or may not be physical location, you can be local to be located at one, or can also be distributed to multiple On NE.Some or all of module therein can be selected according to the actual needs to realize this reality Apply the purpose of a scheme.Those of ordinary skill in the art are not in the case where creative work is paid, you can To understand and implement.

The above, preferably specific embodiment only of the invention, but protection scope of the present invention is not Be confined to this, any those familiar with the art the invention discloses technical scope in, can The change or replacement for readily occurring in, should all be included within the scope of the present invention.Therefore, the present invention Protection domain should be defined by scope of the claims.

Claims

1. a kind of interface circuit, the interface circuit are applied to display driver, and the interface circuit includes First interface, second interface, the first reading unit, the second reading unit and control module；

2. interface circuit according to claim 1, it is characterised in that the control module is specifically used In：

3. interface circuit according to claim 1, it is characterised in that the control module is specifically used In：

4. interface circuit according to claim 1, it is characterised in that the control module is specifically used In：

5. interface circuit according to claim 1, it is characterised in that the interface circuit also includes 3rd interface and the 3rd reading unit, the 3rd interface are connected with the second coprocessor, the third reading Take unit to be connected with the 3rd interface；

6. a kind of display driver, it is characterised in that the display driver includes interface circuit and image Data Synthesis module, the interface circuit include first interface, second interface, the first reading unit and Two reading units；The first interface is connected with CPU, and the second interface is connected with the first coprocessor, First reading unit is connected with the first interface, second reading unit and the second interface Connection, first reading unit and second reading unit respectively with described image Data Synthesis module Connection；

7. display driver according to claim 6, it is characterised in that first reading unit At first association that the image data group or second reading unit of the CPU for reading reads The image data group of reason device referred to as replaces image data group, the figure shown with display screen As corresponding image data group is referred to as being replaced image data group；

Described image Data Synthesis module, specifically for：

8. the display driver according to claim 6 or 7, it is characterised in that described image data Synthesis module is multiplexer or internal memory.

9. display driver according to claim 6, it is characterised in that the display driver is also Including memory cell and synthesis control unit, the memory cell respectively with first reading unit and institute The connection of the second reading unit is stated, the synthesis control unit is connected with first coprocessors of the CPU or described Connect, described image Data Synthesis module is connected with the synthesis control unit；

10. display driver according to claim 6, it is characterised in that the interface circuit is also Including the 3rd interface and the 3rd reading unit, the 3rd interface is connected with the second coprocessor, and described Three reading units are connected with the 3rd interface；

11. a kind of terminal devices, it is characterised in that the terminal device includes that CPU, the first association are processed Device and display driver, wherein, the display driver includes interface circuit, the interface circuit bag Include first interface, second interface, the first reading unit, the second reading unit and control module；

12. terminal devices according to claim 11, it is characterised in that the control module is concrete For：

13. terminal devices according to claim 11, it is characterised in that the control module is concrete For：

14. terminal devices according to claim 11, it is characterised in that the control module is concrete For：

15. terminal devices according to claim 11, it is characterised in that the interface circuit is also wrapped The 3rd interface and the 3rd reading unit are included, the 3rd interface is connected with the second coprocessor, the described 3rd Reading unit is connected with the 3rd interface；

16. terminal devices according to claim 11, it is characterised in that the terminal device is shifting Dynamic terminal or wearable device.

17. a kind of terminal devices, it is characterised in that the terminal device includes that CPU, the first association are processed Device and display driver, the display driver include interface circuit and view data synthesis module, institute Stating interface circuit includes first interface, second interface, the first reading unit and the second reading unit；It is described First interface is connected with the CPU, and the second interface is connected with first coprocessor, and described One reading unit is connected with the first interface, and second reading unit is connected with the second interface, First reading unit and second reading unit are connected with described image Data Synthesis module respectively；

18. terminal devices according to claim 17, it is characterised in that first reading unit At first association that the image data group or second reading unit of the CPU for reading reads The image data group of reason device referred to as replaces image data group, the figure shown with display screen As corresponding image data group is referred to as being replaced image data group；

Described image Data Synthesis module, specifically for：

19. display drivers according to claim 17 or 18, it is characterised in that described image Data Synthesis module is multiplexer or internal memory.

20. terminal devices according to claim 17, it is characterised in that the display driver is also Including memory cell and synthesis control unit, the memory cell respectively with first reading unit and institute The connection of the second reading unit is stated, the synthesis control unit is connected with first coprocessors of the CPU or described Connect, described image Data Synthesis module is connected with the synthesis control unit；

21. terminal devices according to claim 17, it is characterised in that the interface circuit is also wrapped The 3rd interface and the 3rd reading unit are included, the 3rd interface is connected with the second coprocessor, the described 3rd Reading unit is connected with the 3rd interface；

22. terminal devices according to claim 17, it is characterised in that the terminal device is shifting Dynamic terminal or wearable device.

23. a kind of display control methods, it is characterised in that be applied to the terminal with display driver and set Standby, the display driver includes interface circuit, and the interface circuit includes first interface and second interface, Methods described includes：

24. methods according to claim 23, it is characterised in that the interface circuit is according to described The instruction that first coprocessors of CPU or described send controls the first interface and is turned on and off data transfer Function, and/or, for the instruction control described the sent according to first coprocessors of the CPU or described Two interfaces are turned on and off data-transformation facility to be included：

25. methods according to claim 23, it is characterised in that the interface circuit is according to described The instruction that first coprocessors of CPU or described send controls the first interface and is turned on and off data transfer Function, and/or, for the instruction control described the sent according to first coprocessors of the CPU or described Two interfaces are turned on and off data-transformation facility to be included：

26. methods according to claim 23, it is characterised in that the interface circuit is according to described The instruction that first coprocessors of CPU or described send controls the first interface and is turned on and off data transfer Function, and/or, for the instruction control described the sent according to first coprocessors of the CPU or described Two interfaces are turned on and off data-transformation facility to be included：

27. methods according to claim 23, it is characterised in that the interface circuit also includes institute The 3rd interface is stated, methods described also includes：

28. a kind of display control methods, it is characterised in that methods described is applied to display driver Terminal device, the display driver includes interface circuit, the interface circuit include first interface and Second interface, methods described includes：

29. display control methods according to claim 28, it is characterised in that the interface circuit The image data group of the CPU or the image data group of first coprocessor for reading claims To replace image data group, the image data group corresponding with display screen shows image It is referred to as being replaced image data group；

30. methods according to claim 28, it is characterised in that methods described also includes：

31. methods according to claim 28, it is characterised in that the interface circuit also includes the Three interfaces, methods described also include：