KR20050013069A - Apparatus and method for controling Display brightness level - Google Patents

Abstract

PURPOSE: An apparatus and a method for controlling a brightness level of display is provided to vary the brightness level automatically according to an application program currently executed thereby setting, storing and managing information about the brightness level. CONSTITUTION: A memory part stores information about a brightness level in accordance with an application program. A control part reads out the information about the brightness level and thereby controls the brightness level. The memory part includes at least one of a memory, a volatile memory and a non-volatile memory. The control part includes at least one of a filter driver and a microcomputer.

Description

Apparatus and method for controling Display brightness level}

The present invention enables to adjust the brightness level by setting a plurality of brightness levels of the display, and in particular to allow the brightness level of the display to be automatically adjusted according to one or more application programs currently being executed. An apparatus and method for adjusting display brightness level.

Fig. 1 is a block diagram showing the overall configuration of a general computer to which a liquid crystal display (LCD) 19 is attached in a display.

As shown in the figure, the brightness of the LCD is controlled by the control of the microcomputer.

The various types and sizes of the liquid crystal display have different inherent optical characteristics, and conventional light emitting devices, for example, using a CCFL (Cold Cathode Fluorescence Lamp) device provided above or below the liquid crystal display In the case of the liquid crystal display, the brightness of the liquid crystal display is controlled by emitting the CCFL element by a high voltage applied through an inverter.

In the liquid crystal display 19 of the notebook computer, as shown in FIG. 2, a light emitting device 190 such as a Cold Cathode Fluorescence Lamp (CCFL) element is included below or above the liquid crystal display 19.

In addition, a pulse width is applied to a power supply unit 30 for converting the battery power supply 31 or the AC adapter power supply 32 into a predetermined voltage level, and a power supply having a predetermined voltage level applied through the power supply unit 30. The inverter 33 is configured to switch according to a pulse width modulation signal and to be applied to the light emitting device 190.

When the user increases or decreases the brightness level of the liquid crystal display 19 by using a keyboard 21 or another device as an input means, a pulse width modulation (PWM) signal applied to the inverter 33 is applied. By varying, the microcomputer 20 is included to increase or decrease the brightness level of the liquid crystal display.

Meanwhile, in the microcomputer 20, the brightness level of the liquid crystal display is variably adjusted according to a user's key input, and the brightness level of the liquid crystal display is automatically reduced, thereby minimizing battery power consumption.

However, in the general computer as described above, the brightness level of the liquid crystal display is fixedly operated when the application program is normally executed. In this case, in order to variably adjust the brightness level of the liquid crystal display, the user inputs a key or other input. There was a problem that the device had to be adjusted directly to the desired brightness level.

In addition, the conventional display brightness level does not satisfy the user's desired display brightness or excessive brightness because the preset brightness level is applied regardless of one or more application programs used or used. Will be printed.

Therefore, it is not possible to efficiently manage the use of the used power source, especially the battery power source.

Accordingly, an object of the present invention is to set, store, manage, and apply respective display brightness level information corresponding to one or more application programs in a system including a display.

In addition, an object of the present invention is to be able to add, change, save and apply the set brightness level.

Another object of the present invention is to detect one or more APPLICATION PROGRAMs currently operating through a filter driver, and to search, read and apply the brightness levels corresponding to one or more APPLICATION PROGRAMs. It is done.

In addition, an object of the present invention is to output a display at a brightness level corresponding to the current highest APPLICATION PROGRAM when a plurality of APPLICATION PROGRAMs operate.

In addition, an object of the present invention is to notify a user or to apply an already set brightness level when the brightness level corresponding to the APPLICATION PROGRAM is not stored.

In addition, the present invention proposes that a display operated at a brightness level corresponding to each APPLICATION program automatically adjusts the brightness level based on a system state, for example, an idle state or a CPU state.

1 is a block diagram showing the overall configuration of a typical computer attached to a liquid crystal display (LCD) in a display.

2 is a diagram showing the configuration of a liquid crystal display brightness level adjusting device in a general computer.

Figure 3 is a block diagram showing the overall configuration of a computer including a memory and filter driver according to the present invention.

4 is an embodiment of a menu screen for the brightness level information setting mode of the liquid crystal display according to the present invention.

5 is an embodiment of brightness level information in which a liquid crystal display brightness level according to the present invention is stored, changed and further managed.

FIG. 6A is a diagram illustrating the implementation of one or more types of application programs that are currently being executed, which of the currently displayed screens is the full window, and which of the currently executing application programs is the foreground window through the filter driver 23a.

6B shows which of the multiple windows of the window is the foreground;

7 is a flowchart illustrating a first operation of a display brightness level adjusting method according to the present invention.

8 is a flowchart illustrating a second operation of the display brightness level adjusting method according to the present invention.

9 is a flowchart illustrating a third operation of the display brightness level adjusting method according to the present invention.

The display brightness level adjusting apparatus of the present invention includes an input means which may include a keyboard, a mouse or a voice input, a display means including a liquid crystal light, a memory means including non-volatile and general ROM and RAM, a word, and the like. A system comprising a control program comprising an operating program and a filter driver and a microcomputer, the system comprising: memory means for storing one or more brightness level information corresponding to the one or more operating programs described above; Control means for controlling brightness levels by reading brightness level information corresponding to the operating program; And a filter driver for performing at least one operation of determining whether one or more types of application programs that are currently being executed, whether the currently displayed screen is a full window, and which foreground windows are among the currently executed application programs.

In addition, the display brightness level adjustment method of the present invention comprises the steps of setting one or more brightness levels respectively corresponding to one or more APPLICATION PROGRAM and storing in the memory; Detecting whether one or more application programs are executed; When one or more application programs are executed, determining a foreground window program currently being executed; Adjusting and outputting the brightness level corresponding to the determined APPLICATION PROGRAM; It includes.

Hereinafter, exemplary embodiments of a display brightness level adjusting apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram showing an overall configuration of a computer including a memory and a filter driver according to the present invention, and includes a CPU 10, a video controller 11, and a host-PCI bridge 12. As shown in FIG. ), Memory 13, video RAM 14, audio controller 15, LAN controller 16, card bus controller 17, PC-ISA Bridge 18 Memory (13) storing brightness level information corresponding to each APPLICATION PROGRAM whose brightness level is changed or added by the user, LCD (19), microcomputer (20), keyboard (21), and the like. And a filter driver 23a capable of detecting an active program or one or more application programs output on the display. The filter driver 23a stored in the HDD 23 is loaded and operated in the memory 13 after the Windows OS is booted. On the other hand, the PCI-ISA Bridge 18 is operated. The CMOS RAM 180 is included, and the microcomputer 20 includes the ROM 200, the RAM 201, and the keyboard controller 203.

Details related to the aforementioned filter drive are described in detail in Korean Application No. 2002-066828, which will be briefly described.

The filter drive described above continuously monitors an operation state of a device, for example, a network adapter, a display adapter, a mouse, a monitor, a disk driver, and the like, and performs at least one or more functions of the device driver.

Apparatus and method for adjusting the brightness level of a display according to the present invention can be applied to a portable device such as FIG. 3, for example, a notebook computer, and a liquid crystal display suitable for various application programs included in the notebook computer. Save and manage the brightness level information.

In describing the display brightness level of the present invention, the liquid crystal display brightness level adjustment in the portable computer is described, but is not limited thereto.

PDA, SET-TOP BOX, TELEMATIX, etc. Applicable to all devices with a display.

4 illustrates an embodiment of a menu screen for a brightness level information setting mode of a liquid crystal display according to the present invention.

As shown in the figure, each brightness level corresponding to one or more application programs is set / stored by the user, and the set brightness level can be searched, changed, set or added as needed. (further application program).

In addition, it is possible to select whether to automatically apply the brightness level for each application program of the present invention, or to apply the brightness level corresponding to the set application program in the case of a full window in a display capable of a plurality of output screens or to correspond to each application program according to the power used. You can select whether to apply the brightness level.

For example, as shown in FIG. 4, the brightness level information of a movie program for which high brightness is required in the application program is set to, for example, Level_9, and the brightness level information of the game program, For example, set Level_7 to set relatively high brightness level information.

On the other hand, relatively low brightness level information (e.g., Level_1, Level_3) is set in an application program such as a music program or a word processor capable of low brightness.

In addition, for an Internet program or the like requiring normal brightness, intermediate brightness level information (eg, Level_5) is set, stored, and output.

A plurality of brightness levels for each of the application programs can be set, and can be changed and applied according to a user or system state. For example, Movie is currently set to Level 9 only, but it can be changed by setting / saving other brightness levels such as Level 10.

As described above, the method of changing the brightness levels set in plural with respect to one application program is the same as the method of changing the brightness levels set in each application program in the present invention.

5 is a view showing an embodiment of the brightness level information of the liquid crystal display which is stored, changed and additionally managed in the liquid crystal display brightness level control apparatus and method in the portable computer according to the present invention.

As shown in the figure, it can be seen that the display brightness level of the word processor in the application program has been changed from 3 to 4, and the brightness level of the game has been changed from 7 to 8, respectively.

In addition, it can be seen that the brightness level is additionally set to 10 for an application program that outputs students' educational broadcasts (EBS).

In the case of Movie, the brightness level is displayed at level 9.

The change and addition may be performed using the functions of FIG. 4, and the brightness level information arbitrarily changed or additionally set by the user's selection as described above may be changed by the memory 13 of FIG. 3 when the OS is activated. It is managed in, and when the OS is inactive is stored in the HDD (23). In addition, it is stored and managed in a nonvolatile memory, such as EEPROM or Flash Memory 22 included in a notebook computer, and is output to the ROM 200 of the microcomputer 20 based on a setting. It may be stored.

In the present invention, the filter driver 23a of the computer recognizes the foreground window among one or more windows currently being executed, and automatically adjusts the brightness level of the display corresponding thereto, as described in detail below.

Here, the function that the filter driver 23a recognizes the foreground window is as follows.

BOOL SetForegroundWindow ( );

Return Value

Nonzero if the function is successful; otherwise 0.

The function is a function executed by each application to become the top-level window. Therefore, the filter driver 23a can find the top-level window by hooking the above function.

FIG. 6A is a diagram illustrating the implementation of one or more types of application programs that are currently being executed, which of the currently displayed screens is a full window, and which of the currently executing application programs is the foreground window through the filter driver 23a.

As shown in the figure, the currently running application program can be determined based on the information of the windows task manager. For example, one or more applications are operated by different executable files (exe.), And each application program can be known from the executable file information.

In addition, the filter driver determines whether each currently running window is a full window or a sub window, and the window size state change information of each application program (form window state, Maximized: a maximized window, Minimized: a minimized window, and Normal: a default sized window). ) To determine if the current window is maximized or not. Figure 6B also shows which of the multiple windows in the window is the foreground, i.e. the filter driver is the executable of the application program currently running on the kernel of the OS, and monitors each application and corresponds to the size of the window. The information is used to determine each application program type, window state, and the top application program currently in use.

6 is a diagram showing what applications are currently being executed. The operation of FIG. 6 will be described by way of example.

If there are no applications whose window size is maximized as shown in FIG. 6B when there are a plurality of application programs currently running, the auto control mode of FIG. 4 which automatically outputs the brightness level of each application program is disabled.

In this case, the display output is generally set to the brightness level of the highest application program, but it is determined by the user (for example, the lowest brightness level and the average brightness level).

In the filter driver, when the currently output window is detected as a full window, the filter driver displays the output at the brightness level of the application program corresponding to the window.

7 is a flowchart illustrating a first operation of a display brightness level adjusting method according to the present invention.

First, one or more brightness levels corresponding to one or more APPLICATION PROGRAMs are set and already stored in the memory means 13 (S701). These levels may be stored in the HDD 23 or Flash memory 22 in the future.

When the operating system is ready to use after the system is booted after the power is turned on (S702), when the user sets the auto control mode to Yes in the brightness level setting mode in FIG. 4, the filter driver 23a is used. Determines the currently running application program and outputs the brightness level accordingly. (S 703, S 704).

In addition, in the filter driver 23a or the microcomputer 20, the brightness is automatically switched according to the application without the user's input. However, the brightness level can be manually changed according to the user's key input. On the other hand, if the user does not set the auto control mode in the above, the display outputs the display at a preset brightness level to the system. (S 708).

If the brightness level of the APPLICATION PROGRAM being executed in accordance with the steps S 703 and S 704 is changed by the user or if a new brightness level is to be added (S 705), the menu screen as shown in FIG. The level value can be changed by directly clicking on the currently registered brightness level. For example, in the case of Level 7 of the game, if you click 7 directly and enter 10, the level is changed to 10. Then, click the Browse button, which is a function to find a program to run, selects an executable file to add, adds another program, and when the user enters an appropriate brightness level for the program, adds it to the program list to automatically adjust the brightness. Becomes (S 706).

On the other hand, if the current brightness level is not changed or added in step S705, the output continues at the set brightness level. (S 709).

In operation S 706, at least one of the newly set brightness levels may be stored and output in a memory (S 707).

The above process indicates that the application of the brightness level for each application program is performed by the user's selection. In the above, the current brightness level is changed or added as follows.

1) The brightness level can be changed automatically when the system enters the idle state or is smaller than the preset CPU usage.

2) The currently set brightness level can be changed according to the size of the output window.

3) You can change the brightness level that is already set according to your preference.

4) You can add a new brightness level for a new application program not set in the system.

The state in which at least one setting, output, change, addition, etc. is performed through the process of FIG. 7 is shown in FIG. 5.

8 is a flowchart illustrating a second operation of the display brightness level adjusting method according to the present invention.

First, one or more brightness levels corresponding to one or more APPLICATION PROGRAMs are set and are already stored in the memory means 13. (S 801) These levels may be stored in the HDD 23 or Flash memory 22 in the future. This is the case in which the operating system becomes usable after booting up after the system is powered on (S802).

At this time, in the user interface program of FIG. 4, the auto control mode is set to operate at the brightness level set in at least one APPLICATION PROGRAM, and when the Full window item is set to yes (S 803), the filter driver 23a is used. It detects whether the window of the currently running APPLICATION PROGRAM is a full window and at the same time determines whether the brightness level corresponding to the running APPLICATION PROGRAM exists in the memory (S804, S805), and is currently running in the memory. If there is a brightness level corresponding to the application program, the corresponding brightness level is output. (S 806).

Thereafter, when the brightness level of the APPLICATION PROGRAM set and executed according to the above process is changed by the user, or when a new brightness level is to be added (S 807), the menu screen as shown in FIG. It is possible to change the level value by clicking the registered brightness level directly. For example, in the case of Level 7 of the game, click 7 directly and enter 10 to change to level 10. Then, click the Browse button, which is a function to find a program to run, selects an executable file to add, adds another program, and when the user enters an appropriate brightness level for the program, adds it to the program list to automatically adjust the brightness. (S 808).

On the other hand, if the current brightness level is not changed or added in step S 807, the output continues at the set brightness level. (S 812).

According to the step S 808, at least one or more of the newly set brightness level is stored and output in a memory (S 809).

On the other hand, if the brightness level is not set to operate automatically according to each APPLICATION PROGRAM or the currently executed WINDOW is not FULL WINDOW according to the steps S 803 and S 804, the brightness level already set in the system or previously used. The display is output by using one of the brightness levels respectively set to correspond to the APPLICATION PROGRAM. At this time, the power input mode is determined to select the high brightness level among the two when AC in, that is, the adapter, and the low brightness level between the two in the battery mode.

At this time, if the full window item is No (S 803), when a plurality of windows are executed, the display outputs the brightness level of the APPLICATION PROGRAM of the current foreground window detected by the filter driver. (S 810).

In addition, in step S 805, if the brightness level corresponding to the currently running APPLICATION PROGRAM is not set in the memory, the user is notified, the system automatically outputs to the brightness level already set in the system, or the previously used APPLICATION PROGRAM. Control to output using brightness level. (S 811).

The case where the current brightness level is changed or added is as described with reference to FIG. 7.

5 shows a state in which at least one setting, output, change, or addition is performed through the process of FIG. 8.

For example, the filter driver 23a or the microcomputer 20 checks whether the brightness level automatic control mode (Auto ControlMode) of the indicator is set by the user. The setting of the automatic adjustment mode may be selectively set using a user selection menu button outputted and displayed on the indicator as shown in FIG. 5, or may be automatically set without setting.

Therefore, when the brightness level automatic adjustment mode is not set, the filter driver 23a or the microcomputer 20 maintains the duty of the pulse width modulation (PWM) signal applied to the inverter 33 of FIG. 2 as it is. By doing so, the brightness of the liquid crystal display is kept at the current brightness.

On the other hand, when the automatic adjustment mode is set, the filter driver 23a or the microcomputer 20 checks the currently running application program. When a plurality of application programs are executed, what is the highest application program? The acknowledgment is verified through the filter driver, and then the brightness level information of the liquid crystal display set linked to the highest application program is searched and read from the memory.

Then, the duty of the pulse width modulation (PWM) signal applied to the inverter 33 is variably adjusted according to the brightness level information of the liquid crystal display set in association with the searched-out foreground application program, and thus the brightness of the liquid crystal display. Will be adjusted.

For example, when the highest level application program is a movie program, the duty of the pulse width modulation (PWM) signal applied to the inverter 33 is determined according to the brightness level information (for example, Level_9) set high. By variable adjustment, the brightness of the liquid crystal display is brightly adjusted.

However, when the foreground application program is a music program, the duty of the pulse width modulation (PWM) signal applied to the inverter 33 is variably adjusted according to the low brightness level information (eg, Level_1). In this case, the brightness of the liquid crystal display is adjusted to be dark. In this case, in the filter driver 23a or the microcomputer 20, when the currently used system power is battery power, that is, the battery mode is set in the user interface program of FIG. If the above is selected, the above-described series of brightness level adjustment operations are performed, and in the case of an AC adapter power supply, the brightness level adjustment operation is skipped to increase the use time of the battery power and, of course, when using the AC adapter power supply, It is also possible to prevent the brightness of the liquid crystal display from changing unnecessarily.

That is, as shown in FIG. 4, the auto control mode in which the brightness level of the application program is automatically executed may be set to be applied only when the power source is a battery and in a full window state.

9 is a third operation flowchart showing a display brightness level adjusting method according to the present invention.

First, one or more brightness levels corresponding to one or more APPLICATION PROGRAMs are set and are already stored in the memory means 13. (S 901) These levels may be stored in the HDD 23 or the Flash memory 22 in the future. This is the case when the operating system is ready to use after the system is booted after the system is powered on (S902).

At this time, if one or more application programs are running (S 903), the currently running APPLICATION PROGRAM and the foreground window program are determined through the filter driver 23a, and the brightness level corresponding to the determined APPLICATION PROGRAM is adjusted. Output (S 904, S 905).

Thereafter, when the brightness level of the APPLICATION PROGRAM that is set and executed according to the above process is changed by a user or a system state, or when a new brightness level is to be added (S906), the menu shown in FIG. Through the screen, it is possible to change the level value by directly clicking on the currently registered brightness level. For example, in the case of Level 7 of the game, if you click 7 directly and enter 10, the level is changed to 10.

Then, click the Browse button, which is a function to find a program to run, selects an executable file to add, adds another program, and when the user enters an appropriate brightness level for the program, adds it to the program list to automatically adjust the brightness. Becomes (S 907).

On the other hand, if the current brightness level is not changed or added in step S906, the output continues at the set brightness level. (S 910).

In operation S 907, at least one or more of the newly set brightness levels are stored and output in a memory (S 908).

On the other hand, if there is no APPLICATION PROGRAM currently executed according to step S 903, the display outputs at least one of the brightness level already set by the user and the brightness level previously used. (S 909).

The case where the current brightness level is changed or added is as described with reference to FIG. 7.

A state in which at least one setting, output, change, and addition is performed through the process of FIG. 9 is shown in FIG. 5.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

According to the display brightness level control apparatus and method according to the present invention, it is possible to set, add, change, store, manage and apply the respective display brightness level information corresponding to one or more application programs.

In addition, the present invention can perform the display output respectively corresponding to the brightness level of the currently running APPLICATION PROGRAM.

In addition, when the plurality of APPLICATION PROGRAMs are operated, the display may be output at a brightness level corresponding to the currently executed APPLICATION PROGRAM or Foreground APPLICATION PROGRAM.

In addition, the present invention may notify the user or apply a preset brightness level when the brightness level corresponding to the APPLICATION PROGRAM is not stored.

In addition, the present invention can provide various methods for changing the brightness level of the set APPLICATION PROGRAM as needed.

Therefore, the running APPLICATION PROGRAM can be output at the brightness level that is most suitable for the user, and battery life can be extended by preventing unnecessary power usage.

Claims (32)

In computer systems, Memory means for storing brightness level information corresponding to one or more application programs; And And control means for controlling the brightness level by reading the brightness level information corresponding to the application program. The apparatus of claim 1, wherein the storage means comprises at least one of a memory, a volatile memory, and a nonvolatile memory. The apparatus of claim 2, wherein the storage means stores brightness level information corresponding to one or more application programs, and the brightness level information of which the brightness level is changed or newly added is stored. The apparatus of claim 3, wherein the brightness level information of each application program is stored in a binary form. The apparatus of claim 1, wherein the control means comprises at least one filter driver and a microcomputer. 6. The method of claim 5, wherein the control means variably adjusts the duty of the pulse width modulation (PWM) signal applied to the display to control the brightness level so as to correspond to the application program to be executed, thereby adjusting the brightness of the liquid crystal display. Display brightness level control device, characterized in that. 6. The display brightness level control device according to claim 5, wherein the brightness level control operation for each application program by the control means is performed by at least one method of user selection of a user interface and manual setting by an input device. The apparatus of claim 5, wherein the control unit performs a brightness level adjusting operation only when the system power is in a battery mode. The method of claim 1, further comprising a filter driver for performing at least one discrimination operation for distinguishing one or more types of application programs that are currently being executed, whether the currently displayed screen is a full window, and which of the currently executing application programs is a Foreground Window. Display brightness level control device comprising a. In a method for adjusting the display brightness level in a computer system, Determining an application program to be executed; And And outputting the display at a brightness level corresponding to the determined application program. The method of claim 10, further comprising setting brightness level information corresponding to one or more application programs, respectively. The method of claim 10, wherein the brightness level information of the application program is stored in the memory by setting the brightness level value for each application program on a user interface program. 11. The method of claim 10, wherein in the case of more than one application program being executed Identifying a foreground application program being executed; Retrieving brightness level information corresponding to the identified Foreground application program; And And adjusting the brightness of the display according to the retrieved brightness level information. The method of claim 13, wherein the foreground application program being executed is detected by the application program detecting means. 15. The method of claim 14, wherein the filter driver as the application program detecting means determines whether the application program is a Foreground application program. The method of claim 15, wherein the filter driver monitors a BOOL SetForegroundWindow ( ) function among a plurality of currently running application programs and recognizes the Foreground application program as a foreground application program. Setting brightness levels corresponding to one or more APPLICATION PROGRAMs and storing the brightness levels in memory means; When the user sets the automatic adjustment mode, determining an APPLICATION PROGRAM currently being executed through a filter driver; Searching for and reading brightness level information corresponding to the determined application program; And And outputting the read brightness level information as the read brightness level information. 18. The method of claim 17, further comprising the step of outputting to the system a preset brightness level or a previously used brightness level if the user does not set the automatic adjustment mode. 18. The method of claim 17, wherein when the user changes the brightness level of the set APPLICATION PROGRAM by the user interface, changing the brightness level by using at least one of clicking the corresponding APPLICATION PROGRAM and clicking the current brightness level. Display brightness level control method further comprises. 18. The method of claim 17, wherein when a brightness level of the APPLICATION PROGRAM is to be added, a browse button, which is a function of searching for a program to be executed, is pressed to select an executable file to be added to add the corresponding program, and the appropriate brightness to the program. And adding a level by a user inputting the display brightness level. 18. The method of claim 17, further comprising storing at least one of the changed brightness levels in a memory and outputting the changed brightness levels. 21. The method of claim 20, further comprising storing and outputting the newly added brightness level in a memory. Setting brightness levels corresponding to one or more APPLICATION PROGRAMs and storing the brightness levels in memory means; When the user selects the automatic brightness adjustment mode and the full window mode, determining an application program currently running through the filter driver; Searching for and reading brightness level information corresponding to the determined application program; And And outputting the read brightness level information through a display. 24. The method of claim 23, further comprising determining whether a window of the APPLICATION PROGRAM currently running through the filter driver is a full window. The method of claim 24, wherein the filter driver monitors a Form Window Status () function to determine whether a window of the APPLICATION PROGRAM currently being executed is a full window. 24. The method of claim 23, further comprising detecting whether brightness level information corresponding to the determined application program exists in the memory. 24. The method of claim 23, wherein if the brightness level is not set to operate automatically according to each APPLICATION PROGRAM, outputting a display using either a brightness level already set in the system or a brightness level previously used; Display brightness level adjustment method characterized in that it further comprises. 25. The method of claim 24, further comprising: outputting a display by using one of brightness levels previously set in the system or brightness levels previously used when the currently executed WINDOW is not a full window. Display brightness level adjustment method. The method as claimed in claim 26, further comprising: controlling to output to the user when the brightness level information corresponding to the determined application program is not present in the memory, or using automatic output at a brightness level already set in the system. Display brightness level adjustment method characterized in that it further comprises. 24. The method of claim 23, wherein the automatic adjustment mode is set by one or more cases that are set by the user and set by default in a system using a selection menu button. 24. The method of claim 23, wherein the auto control mode in which the brightness level of the application program is automatically executed is at least one of a case where the power source is a battery and at least one of a full window state. Detecting whether one or more application programs are executed; When at least one application program is executed, determining at least one or more currently running application program and foreground window programs; Adjusting and outputting the brightness level corresponding to the determined APPLICATION PROGRAM; Setting one or more brightness levels respectively corresponding to one or more APPLICATION PROGRAMs and storing them in a memory; And outputting a display by using at least one brightness level previously set by the user and a brightness level previously used by the user when the APPLICATION PROGRAM currently executed does not exist. Way.