KR20060091969A - How to control screen display brightness in mobile communication terminal - Google Patents

Abstract

The present invention relates to a brightness control method of a screen display unit in a mobile communication terminal that can implement the LCD contrast of the mobile communication terminal in various stages.

The present invention is a step of determining whether the power saving mode entry condition, in the power saving mode state, maintaining the first brightness ratio for t1 time, and after t1 time, whether the power saving mode entry condition Retrieving, maintaining the second brightness ratio for t2 time in the power saving mode, judging whether or not entering the power saving mode after t2, and in power saving mode. The present invention provides a method of controlling the brightness of a screen display unit in a mobile communication terminal, comprising: turning off the power. Therefore, even if there is no dimming control pin on the LCD, the power can be saved by adjusting the contrast to achieve a certain level of brightness that is darker than the initial brightness and brighter than the later brightness in the folder open state.

Backlight, Contrast, LCD, Constant Brightness

Description

Screen brightness control method of mobile communication terminal {Screen luminosity control method of Mobile Phone}

1 is a view for explaining a conventional general mobile communication terminal.

2 is a functional block diagram of a mobile communication terminal according to the present invention;

3 is a flowchart illustrating a method for controlling brightness of a screen display unit in a mobile communication terminal according to the present invention.

* Explanation of symbols for main parts of the drawings

10: folder open detector

20: Main Processor

30 LCD part

40: backlight control unit

50: backlight

The present invention relates to a mobile communication terminal, and more particularly, to a method of controlling the brightness of the screen display by contrast control in the mobile communication terminal.

1 is a view for explaining a conventional mobile communication terminal of the related art, the information of the mobile communication terminal is displayed on the mobile communication terminal screen display unit (1).

The LCD screen and the backlight unit of the mobile communication terminal screen display unit 1 is a component.

When you open a folder on the mobile terminal, the display screen becomes bright and after a certain time, the screen brightness is darker than the initial screen brightness and the brightness is brighter than when the screen is turned off. Lose.

In the case of the LCD, when the backlight is turned off, the screen is hard to see. Therefore, in order to solve this problem, the display is usually performed at a predetermined level of brightness before the backlight is turned off.

As such, there was a method of controlling the screen brightness of the screen display unit 1 of the mobile communication terminal.

Conventional methods of controlling screen brightness include a liquid crystal display (hereinafter referred to as an LCD). If a dimming control pin is present or not in a module, the screen of the mobile communication terminal is fixed. There was a way to implement brightness.

When the dimming control pin is present in the LCD module of the mobile communication terminal, the brightness of the display window is adjusted by the control signal of the dimming control pin in the main processor.

However, when the LCD module of the mobile communication terminal does not have a dimming control pin, the brightness is controlled by quickly turning on / off the backlight on pin of the LCD module.

 However, the screen brightness control method in the above-described conventional mobile communication terminal has the following problems.

First, when there is no dimming control pin in the LCD module, there is a problem in that the display operation with a predetermined level of brightness cannot be performed.

Second, if there is no dimming control pin in the LCD module, the LCD backlight on pin can be quickly turned on and off to achieve a constant brightness. You can feel the flicker as

The present invention is to solve the above problems, an object of the present invention is to adjust the contrast in a number of stages even when there is no dimming control pin on the LCD constant darker than the initial brightness in the folder open state (brighter than the later brightness) The present invention provides a method for controlling brightness of a screen display unit in a mobile communication terminal capable of implementing brightness of a stage.

In order to achieve the above object, the present invention is to determine whether the power saving mode entry condition, and in the power saving mode state, maintaining the first brightness ratio for t1 time, and after the time t1, power saving Judging whether it is a mode entry condition, maintaining a second brightness ratio for t2 hours in a power saving mode state, and judging whether it is a power saving mode entry condition after t2 hours; In the power saving mode, the method of controlling the brightness of the screen display unit is provided in the mobile communication terminal.

In addition, the adjustment of the brightness ratio is preferably controlled by software in the control unit for controlling the voltage supplied to the backlight of the LCD.

Therefore, according to the present invention, it is possible to save power by adjusting the contrast of the LCD (hereinafter referred to as 'contrast') by implementing a certain level of brightness that is darker than the initial brightness and brighter than the later brightness in the folder open state. Do.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can be specifically realized for the above purpose.

According to the present invention, when power is applied to the mobile communication terminal screen display unit 1 by opening a folder and the mobile communication terminal screen display unit 1 becomes bright, the first screen of the mobile communication terminal screen display unit 1 has a predetermined time. When the mobile terminal screen display unit 1 when the power is turned off after the elapsed time is dark, in order to implement a constant brightness that is darker than the initial brightness and brighter than when the power is turned off. It is about.

2 and 3, an embodiment of a screen brightness control method in a mobile communication terminal according to the present invention will be described.

First, FIG. 2 is a block diagram of functions in a mobile communication terminal according to the present invention.

As shown in FIG. 2, the mobile communication terminal according to the present invention includes a main processor 20 and a main processor connected to the folder open detector 10 and the folder open detector 10. The LCD unit 30 connected to the processor 20, the backlight control unit 40, and the backlight unit 50 connected to the backlight control unit 40 are included.

The folder open detection unit 10 is a folder open in the mobile communication terminal (this is a flip-type terminal when opening the flip, when the slide terminal, such as when the display unit of the mobile communication terminal is turned on, including sliding and opening the slide, etc.). When it is detected) it detects this and sends a signal to the main processor 20.

When the main processor 20 receives a signal indicating that the folder of the mobile phone is opened from the folder open detector 10, the main processor 20 detects the signal and outputs a contrast control signal to the LCD unit 30.

The LCD unit 30 is a part for displaying an image on the LCD screen under the control of the main processor 20.

The backlight controller 40 receives the backlight control signal BL_EN output from the main processor 20 to control the on / off of the backlight unit 50 to adjust contrast.

Finally, the backlight unit 50 turns on / off the backlight under the control of the backlight controller 40.

3 is a flowchart illustrating a method of controlling brightness of a screen display unit in a mobile communication terminal according to the present invention.

First, the user opens a folder (S10). Opening the folder includes all the actions to make the screen display unit 1 of the mobile communication terminal brighter. As the screen display unit 1 of the mobile communication terminal becomes brighter, the power of the mobile communication terminal is consumed more than before the folder opening.

When the folder is opened, the folder open detection unit 10 detects the folder open to determine whether the power saving mode entry condition (S20).

As a result of the determination in step S20, if the power saving mode entry condition, the first brightness ratio is maintained for t1 time (S30). Here, t1 is a time that can be set by the user of the mobile communication terminal, and the time is determined by counting by a counter of the main processor 20.

In this regard, the adjustment of the brightness ratio is to adjust the brightness ratio in the backlight control unit 40 that controls the voltage supplied to the backlight unit 50 of the LCD, characterized in that the software (SW).

The first brightness ratio may be adjusted between 0% and 100% by adjusting the voltage supplied to the backlight unit 50 of the LCD by a software source. In the Software Source, a register value for adjusting contrast can be set. For example,

① Register: 000 (0%, very dark)

② Register: 001 (25%, dark)

③ Register: 010 (50%, middle)

④ Register: 011 (75%, bright)

⑤ Register: 100 (100%, very bright)

If you set to, the LCD data will be dark or lightly scattered depending on the value of each registered register.

It is preferable that the said 1st brightness ratio is 50%, for example.

Next, after t1 time elapses after the counter of the main processor 20 counts, it is determined whether the power saving mode entry condition is again (S40). The determination of step S40 is characterized in that the counter counts from the time when the user inputs the key of the mobile communication terminal.

As a result of the determination in step S40, if the power saving mode entry condition, the second brightness ratio is maintained for t2 time (S50). Here, the counter for counting the t2 time is different from the counter for counting the t1 time.

Here, the second brightness ratio can be adjusted from 0% to 100% as the brightness ratio can be adjusted in the software source like the first brightness ratio. Preferably, the second brightness ratio is not brighter than the first brightness ratio, and the second brightness ratio is preferably 0%.

After the elapse of t2 hours, it is again determined whether the power saving mode entry condition (S60). The determination of step S60 is performed by the main processor 20. When the determination result of step S60 is a condition for entering the power saving mode, the backlight controller 40 controls not to supply a voltage so that the power is turned off (S70).

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention.

The method of controlling the brightness of the screen display unit in the mobile communication terminal according to the present invention described above is to adjust the contrast of the screen brightness in several steps so that the brightness of the screen display unit is darker than the initial brightness and brighter than the later brightness in the folder open state. Power can be saved by implementing brightness.

Claims (5)

(a) determining whether the power saving mode entry condition; (b) maintaining the first brightness ratio for t1 time when the power saving mode is entered; (c) determining whether the power saving mode entry condition is passed after time t1 has elapsed; (d) maintaining the second brightness ratio for t2 time when the power saving mode is entered; (e) judging whether or not the power saving mode entry condition is passed after t2 hours; (f) a method of controlling the brightness of the screen display unit in a mobile communication terminal, characterized in that it comprises the step of turning off the power in the power saving mode entry state. The method of claim 1, wherein step (a) comprises: The screen display unit power saving mode condition of the screen display unit brightness control method of the mobile communication terminal, characterized in that the folder is open (OPEN). The method of claim 1, wherein step (c) comprises: Power saving mode condition of the screen display unit is the brightness control method of the screen display unit of the mobile communication terminal, characterized in that from the time point of the end of the key input. The method of claim 1, The brightness ratio is controlled by a control unit that variably controls the amount of voltage supplied to control the brightness of the screen display unit. The method of claim 4, wherein The control unit controls the brightness of the screen display unit of the mobile communication terminal, characterized in that the software is adjusted.

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