KR100695218B1 - Method for simultaneously displaying multiple midlet for mobile communication terminal - Google Patents

Abstract

A method for simultaneously displaying plural MIDlets in a mobile communication terminal is provided to enable the MIDLets to share and display a specific area within each screen while two or more MIDLets are simultaneously operated on an MVM(Multitasking Virtual Machine) and set an output order if display areas of the MIDLets are overlapped, thereby consistently managing the display of the MIDLets. A method for simultaneously displaying plural MIDlets comprises the following steps of: enabling the MIDLet to calculate and confirm display information(S220); generating an off-screen buffer having the same size as the display information(S230); enabling the MIDLet to transmit the off-screen buffer to a multi-display management unit(S240); enabling the multi-display management unit to register the off-screen buffer of the MIDLet in an FIFO(First In First Out) list(S250); and performing display of the MIDLet according the off-screen buffer registered in the FIFO list(S260).

Description

Method for Simultaneously Displaying Multiple MIDlet for Mobile Communication Terminal}

1 is a conceptual structural diagram illustrating an execution environment of a MIDP-based middlelet according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a method of displaying a MIDP-based middlelet according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: middlelet 120: CLDC / MIDP

130: display control API 140: multitasking virtual machine

150: multi-display operation unit 160: basic system layer

The present invention relates to a method for simultaneously displaying a plurality of middlelets in a mobile communication terminal. More specifically, the MIDP standard wireless Internet platform having a MVM (Multitasking Virtual Machine) function that stores a middlelet (MIDlet), an application of the Mobile Information Device Profile (MIDP) standard, and simultaneously executes one or more middlelets is installed. The present invention relates to a method of simultaneously displaying a plurality of middlelets using a FIFO list.

The mobile communication system has developed through a first generation analog AMPS (Advanced Mobile Phone System) method, a second generation cellular (Cellular) and personal communication service (PCS) method, and recently, a third generation high speed data. International Mobile Telecommunication-2000 (IMT-2000) has been developed. The 1X system and the EV-DO system are called 2.5 generations because they use the same frequency band (800 MHz, 1.8 GHz) as the second generation of cellular / PCS services and provide some of the IMT-2000 functionality called the third generation. .

In the first and second generation schemes, voice communication is mostly performed using a mobile communication terminal, and data communication has been extremely limited. However, due to the steady development of mobile communication technology, 2.5 generation and 3 generation systems have emerged, and recently, mobile terminals have become a core tool for performing data communication.

Recently, with the development of internet and multimedia data technology, a content provider (CP) that provides various contents such as multimedia communication, network game, and video game has emerged. Mobile subscribers who want to use applications have increased.

Therefore, in a wireless Internet environment, a virtual machine-based Wireless Internet Platform is used to execute embedded applications that are embedded when a mobile terminal is released, or content provided by a content provider on an information server. Generated as an application running on a wireless Internet platform and transmitted to a mobile communication terminal carried by a mobile subscriber through a mobile communication network, and the downloaded mobile communication terminal is running the application on the provided wireless Internet platform.

A portable small electronic communication device such as a mobile communication terminal is basically equipped with a wireless internet platform of MIDP (Mobile Information Device Profile) standard.

The conventional MIDP wireless Internet platform has been able to execute one application at a time when executing various applications stored in a mobile communication terminal. Recently, in order to overcome this limitation, a multitasking virtual machine (MVM) It is equipped with platform that adds Virtual Machine function.

The MVM function is a function that provides an execution environment for executing multiple middlelets (i.e., applications) on a single wireless Internet platform. The MIDP, which is an MIDP-compliant application, operates one or more applications in an MVM environment. While accessing the Display Device, it occupies the screen and is displayed visually.

As such, advances in mobile communication technology have enabled multitasking, in which multiple applications operate simultaneously with increased CPU performance and memory load. For example, multi-tasking environments can be used to send SMS messages while an application with MP3 playback is running, to play games related to broadcasting while watching DMB broadcasts, and so on.

However, due to the characteristics of a mobile communication terminal with a small screen, only one application is output by occupying the screen at a time. That is, in the MIDP standard of the conventional wireless Internet platform environment, there is no consideration of a display method in a multitasking environment in which two or more programs operate simultaneously, and the running middlelet is to monopolize the screen device during operation.

Therefore, when several applications are executed simultaneously and each result needs to be output to the mobile terminal screen, in addition to replacing an existing Java virtual machine capable of executing only one middlelet at a time with a multitasking MVM, There is a need for a new display method that can be applied when two or more virtual machine-based middlelets are running simultaneously.

In addition, the middlelets that operate in a multitasking environment may have a graphical user interface that informs their status and receives a signal in a screen in some cases, so that two or more middlelets simultaneously display graphics. In this case, the screen device must be shared and used. Therefore, middlelets using screen devices at the same time should be able to use them independently by designating their own area within the screen, and when the screen areas used by the middlelets overlap each other, they can manage the order in which they are drawn. Function needed.

In order to solve the above problems, the present invention, MIDP (MIDlet) that is an application of the Mobile Information Device Profile (MIDP) standard, and MIDP having a multitasking virtual machine (MVM) function to execute one or more middlelets at the same time An object of the present invention is to provide a method of simultaneously displaying a plurality of middlelets using a first in first out (FIFO) list in a mobile communication terminal equipped with a wireless internet platform.

In order to achieve the above object, the present invention includes a MIDlet, which is an application of a Mobile Information Device Profile (MIDP) standard, and has a multitasking virtual machine (MVM) function for simultaneously executing two or more of the middlelets. In a mobile communication terminal equipped with a MIDP standard wireless Internet platform displaying the execution result of the middlelet, a method of simultaneously displaying a plurality of the middlelets, the method comprising: (a) the middlelet calculates and determines display information; Doing; (b) creating an off-screen buffer of the same size as the display information; (c) the middlelet transmitting the off-screen buffer to a multi-display management unit; (d) registering, by the multi-display operator, the off-screen buffer of the middlelet to a First In First Out (FIFO) list; And (e) performing the display of the middlelets according to the off-screen buffers registered in the FIFO list.

According to another object of the present invention, there is provided a MVM (Multitasking Virtual Machine) function for storing a middlelet (MIDlet), which is an application of a Mobile Information Device Profile (MIDP) standard, and simultaneously executing one or more of the middlelets. In a mobile communication terminal equipped with a wireless internet platform of MIDP standard displaying the execution result of the middlelet, the method of updating the display screen of the middlelet, (a) by calculating the display information updated by the middlelet Determining; (b) creating an updated off-screen buffer of the same size as the updated display information; (c) the middlelet transmitting the updated off-screen buffer to a multi-display management unit; (d) the multi-display manager updating an off-screen buffer according to the updated off-screen buffer of the middlelet in a First In First Out (FIFO) list; And (e) performing the display of the middlelet in accordance with the off-screen buffer updated in the FIFO list.

According to another object of the present invention, there is provided a MVM (Multitasking Virtual Machine) function for storing a middlelet (MIDlet), which is an application of a Mobile Information Device Profile (MIDP) standard, and simultaneously executing one or more of the middlelets. In a mobile communication terminal equipped with a MIDP standard wireless Internet platform for displaying the execution result of the middlelet, the program for simultaneously displaying a plurality of the middlelet, (a) off-screen same as the display information of the middlelet Storing a buffer (Off-Screen Buffer) in a FIFO list (First In First Out); (b) updating the off-screen buffer stored in the FIFO list; (c) a function of changing the order of the off-screen buffers stored in the FIFO list and the order of update; And (d) a function of displaying the plurality of middlelets according to the off-screen buffer stored in the FIFO list. Provides a recording medium that can be read by.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a conceptual structural diagram illustrating an execution environment of a MIDP-based middlelet according to a preferred embodiment of the present invention.

The MIDlet 110 is an application that is an application that runs on a mobile terminal, and is a collection of various applications that run on a wireless Internet platform such as e-mail, location-based services, games, characters / bells, video streaming, and group chat. to be.

The middlelet 110 according to the preferred embodiment of the present invention includes a connected limited device configuration / mobile information device profile (CLDC / MIDP) 120 and a display control API application program interface (API). In order to execute the display through the screen device, the display information, such as the position and size of the screen area to be used, is calculated and determined to be executed on the display device 130, and the size of the same size as the determined display information is turned off. Create and register an off-screen buffer.

The CLDC / MIDP 120 is an essential API supported by the wireless Internet platform and is an application execution environment mounted in a mobile communication terminal. Here, CLDC is a configuration for a virtual machine-based portable device, and CLDC is composed of a virtual machine and a core API. MIDP is also an overview for CLDC based portable devices.

The display control API 130 provides an interface for accessing the multi-display management unit 150 to allow a plurality of middlelets 110 to share and display the screen of the mobile communication terminal. Java based API.

The multitasking virtual machine (MVM) is a Java-based virtual machine that supports multitasking by providing an environment in which a plurality of middlelets 110 can be executed simultaneously.

The multi-display operating unit 150 manages the display information and the off-screen buffer of the middlelet 110 in the form of a list. That is, a function of registering and managing an off-screen buffer, which is display information received from the middlelet 110, as a FIFO list is performed. When the display information is registered from the middlelet 110, the multi-display operating unit 140 according to an exemplary embodiment of the present invention adds from the rear of the first in first out (FIFO) list and displays the first middlelet to be displayed first. It is registered in the FIFO list from the display information of 110). The display information of the middlelet 110 to be displayed first is placed at the front of the FIFO list, so that the middlelet 110 registered last in the FIFO list is stored at the end of the list and all other middlelets 110 are displayed. Will be displayed on top of.

The native system layer 160 is composed of mobile terminal hardware and basic software, and includes a hardware device constituting the mobile terminal and software for performing basic functions of the mobile terminal. Here, the hardware is a microprocessor that controls all devices and overall functions of the mobile communication terminal, nonvolatile memory utilized as a storage device, random access memory (RAM) that temporarily stores data and is randomly accessible. ), A user interface unit, a digital signal processor, a baseband converter, and an RF signal processor. In addition, the basic software includes software for performing basic functions of mobile communication performed by the mobile communication terminal and drivers of various devices.

2 is a flowchart illustrating a method of displaying a MIDP-based middlelet according to an exemplary embodiment of the present invention.

When the middlelet 110 stored in the mobile communication terminal is executed 210 according to a preferred embodiment of the present invention, the middlelet 110 occupies a screen device and the position and size of the screen area to be used by the user to perform the display. The display information of the display is calculated and determined (S220). If the display information is confirmed, an off-screen buffer having the same size as the determined display information is generated (S230). The middlelet 110 transmits the generated off-screen buffer to the multi-display manager 150 when the off-screen buffer is generated (S240), and the multi-display manager 150 to the middlelet 110. The off-screen buffer is received and registered in the FIFO list in the order of output (S250).

In this case, the display information received from the middlelet 110 is added and registered from the rear of the FIFO list, and is registered first from the display information of the middlelet 110 to be displayed first. That is, the display information of the middlelet 110 to be displayed first is located at the front of the FIFO list, and the middlelet 110 registered at the latest in the FIFO list is stored at the end of the list so that all other middlelets 110 are displayed. It is displayed on the top (S260).

It is determined whether an update of the middlelet 110 occurs while the display of the middlelet 110 is performed (S270), and when the middlelet 110 is updated, the middlelet 110 displays a display for outputting the updated screen. When the information is determined to generate an off-screen buffer (S272), and the updated off-screen buffer is transmitted to the multi-display manager 150 (S274), the multi-display manager 150 middles the FIFO list. The off-screen buffer of the corresponding middlelet 110 is updated according to the updated display information transmitted from the let 110 (S276). Herein, only off-screen buffers overlapping with the updated off-screen buffer may be updated to minimize the update of the screen. When the off-screen buffer is updated, the updated screen is output (S278).

According to a preferred embodiment of the present invention, the screen update process of two or more middlelets 110 operating at the same time may be managed using the same method as described above. In addition, each middlelet 110 may use a screen processing off-screen buffer to update the screen independently of the other middlelets 110, and manage the screen update order using the FIFO list. It is also possible to change the update order of the middlelet 110 by changing the order.

After performing the display of the middlelet 110, it is determined whether the middlelet 110 ends (S280), and when the middlelet 110 ends, the execution of the middlelet 110 ends.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when two or more middlelets are simultaneously operated on the MVM, the middlelets may respectively display and occupy a specific area within the screen. It has the effect of managing the order in which they are displayed so that they are displayed consistently.

Claims (11)

A MIDP which stores a middlelet, which is an application of a mobile information device profile (MIDP) standard, and executes two or more middlelets at the same time, and displays a result of executing the middlelet. In a mobile communication terminal equipped with a wireless Internet platform of the standard, A method for simultaneously displaying a plurality of the middlelet, (a) the middlelet calculating and confirming display information; (b) creating an off-screen buffer of the same size as the display information; (c) the middlelet transmitting the off-screen buffer to a multi-display management unit; (d) registering, by the multi-display operator, the off-screen buffer of the middlelet to a First In First Out (FIFO) list; And (e) performing the display of the middlelet according to the off-screen buffer registered in the FIFO list And simultaneously displaying a plurality of middlelets. The method of claim 1, wherein in step (a), And wherein the display information includes at least one of a position and a size of a screen area to be used by the middlelet. The method of claim 1, wherein in step (d), Wherein the multi-display operating unit determines the display order of the middlelets and places the off-screen buffers of the middlelets displayed first in front of the FIFO list. . The method of claim 1, wherein in step (e), And wherein the multi-display operating unit displays sequentially from the off-screen buffer of the middlelet located in front of the FIFO list. A MIDP which stores a middlelet, which is an application of a mobile information device profile (MIDP) standard, and executes one or more of the middlelets at the same time, and displays a result of executing the middlelet. In a mobile communication terminal equipped with a wireless Internet platform of the standard, in the method for updating the display screen of the middlelet, (a) calculating and confirming updated display information of the middlelet; (b) creating an updated off-screen buffer of the same size as the updated display information; (c) the middlelet transmitting the updated off-screen buffer to a multi-display management unit; (d) the multi-display manager updating an off-screen buffer according to the updated off-screen buffer of the middlelet in a First In First Out (FIFO) list; And (e) performing the display of the middlelet according to the off-screen buffer updated in the FIFO list How to update the display screen of the middlelet, comprising a. The method of claim 5, wherein in step (d), And the multi-display operating unit updates only the off-screen buffer overlapping the updated off-screen buffer. The method of claim 5, wherein in step (d), And the multi-display operating unit updates the display screen of the middlelet independently of other middlelets by using each of the off-screen buffers for each middlelet. The method of claim 5, wherein in step (d), And the multi-display operating unit changes the order of updating the middlelet by changing the order of the FIFO list. A MIDP which stores a middlelet, which is an application of a mobile information device profile (MIDP) standard, and executes one or more of the middlelets at the same time, and displays a result of executing the middlelet. In a mobile communication terminal equipped with a wireless Internet platform of the standard, in the program for simultaneously displaying a plurality of the middlelet, (a) storing an off-screen buffer identical to the display information of the middlelet in a FIFO list (First In First Out); (b) updating the off-screen buffer stored in the FIFO list; (c) a function of changing the order of the off-screen buffers stored in the FIFO list and the order of update; And (d) a function of performing the display of the middlelet according to the off-screen buffer stored in the FIFO list A recording medium readable by a mobile communication terminal having recorded thereon a program which performs a function of simultaneously displaying a plurality of middlelets. The method of claim 9, wherein the function (a) is A mobile communication terminal recording a program for simultaneously displaying a plurality of middlelets, wherein the off-screen buffer of the middlelet to be displayed first is stored in front of the FIFO list according to the display order of the middlelet Readable media on. The method of claim 9, wherein the function (d) is And a program for performing a function of simultaneously displaying a plurality of middlelets, which are displayed in order from the off-screen buffer stored at the front of the FIFO list.

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