KR20030042208A - Cellular-phone having an auto- adjustment function of LCD lamp and controlling method therefore - Google Patents

Abstract

PURPOSE: A mobile phone having an automatic LCD illumination control function and a control method thereof are provided to detect ambient brightness and automatically control LCD illumination to a brightness level according to the detected value. CONSTITUTION: In an initial stage(S1), it is judged whether a menu function is newly set for a mobile phone(S2). If the menu function is not newly set, a general call mode is executed(S3). If the menu function is newly set, it is judged whether a lamp level has been set in an automatic mode(S4). If the lamp level is not in the automatic mode, a lamp is controlled to a previously set lamp level(S5). If the lamp level has been set in the automatic mode, brightness around the mobile phone is detected(S6). Appropriate brightness level data are generated by using the detected ambient brightness signal(S7). An illumination brightness level of a display unit is controlled by multi-step according to the appropriate brightness level data(S8).

Description

Cellular phone with an LCD lighting automatic control function and its control method {Cellular-phone having an auto-adjustment function of LCD lamp and controlling method therefore}

The present invention relates to a mobile phone equipped with an automatic LCD lighting adjustment function and a control method thereof. In particular, a sensor is provided on the outside of the mobile phone to detect ambient brightness and automatically adjust the illumination of the LCD to a brightness level proportional to the detected value. The present invention relates to a mobile phone equipped with an automatic LCD lighting adjustment function and a control method thereof.

In general, mobile communication systems have been rapidly developed as the industrial society has spread rapidly. Especially in the early 1980s, in North America, the service area was divided into hexagonal cells of several km to several ten kilometers in diameter, and then in the geographically separated cells. The mobile communication system has grown rapidly by using a cellular mobile communication system that uses the same frequency channel repeatedly and implements a radio channel switching function between cells as the subscriber moves.

Then, referring to the conventional mobile phone as described above with reference to FIG. 1, the codec unit 71 for processing the voice signal input and output through the handset 70, and the audio signal input and output through the codec unit 71 RF A mobile station modem (73) for overall control of the functions of the mobile phone 72, including a function of signal processing and transmission to other communication equipment, and inputting a function setting signal of the user to the MSM unit 73. A key button lighting control unit 75 for controlling the key button background illumination of the key panel unit 74 according to the key panel unit 74, the key button illumination control signal of the MSM unit 73, and the MSM unit 73 LCD display driver 77 for controlling the display and illumination of the LCD (76) in accordance with the display control signal and the illumination control signal.

On the other hand, looking at the operation of the conventional mobile phone as described above, if the user first wants to make a phone call, the user inputs the phone number through the key panel unit 74, at this time, the MSM unit 73 recognizes this base station (Not shown) forms a call with the other party's mobile phone (78). Then, the user transmits the necessary voice through the handset 70 of his mobile phone (78). The voice of the user is input to the codec unit 71 of the mobile phone 72. In addition, the codec unit 71 converts a voice signal of the user input through the handset 70 into a voice signal processing, for example, an analog voice signal into a digital signal and inputs it to the MSM unit 73. In addition, the MSM unit 73 modulates the digital voice signal input from the codec unit 71, and then processes the RF signal and transmits the RF signal to the other party's mobile phone 78 through the antenna 79 to perform a normal voice call.

Here, when the MSM unit 73 of the mobile phone 72 has the call function and the background light of the LCD 76 and the key button background light of the key panel 74 are set by the user, for example, Executes the selected function when any one of menu items such as "1. Off, 2. On, 3. On for a few seconds, 4. On only at night" is set. For example, when the user of the mobile phone 72 sets the "3. turn on for a few seconds" item, the MSM unit 73 drives the LCD driving driver 77 when the user uses the mobile phone 72 for the first time. The background lamp of 76) is controlled to turn on only for a few seconds. In addition, the MSM unit 73 controls the key button lighting control unit 75 to turn on the key-blow lighting lamp only for a few seconds while the user uses the button of the key panel unit 74.

However, such a conventional mobile phone controls the background lighting lamp of the LCD 76 and the key button lighting lamp of the key panel unit 74 according to a function set once by the user regardless of the brightness of the surrounding, such as a place where lighting is unnecessary. In other words, it is turned on in daylight when the sun shines or in bright places where the light shines, thus causing the problem of increasing the consumption of mobile phone batteries.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems, by having a sensor on the outside of the mobile phone by detecting the ambient brightness and automatically adjusting the illumination of the LCD to the brightness level proportional to the detected value, unnecessary The purpose of the present invention is to provide a mobile phone equipped with an LCD lighting automatic control function and a control method thereof, which significantly prevents power consumption of the LCD light, thereby significantly improving the power saving function of the mobile phone battery.

Another object of the present invention is to provide a mobile phone equipped with an LCD light automatic adjustment function and a control method thereof, as the background light of the key buttons is also adjusted in multiple levels by using the detected ambient brightness level signal. It is.

The present invention for achieving the above object is a lamp level automatic mode setting confirmation step of confirming whether the lamp level of the display device is set to the automatic mode in the mobile phone, and by the automatic lamp control mode setting confirmation step of the present display device If it is confirmed that the lamp control is not set to the automatic mode, the preset mode operation step of controlling the lamp of the display device with the lamp control mode of the previously set display device, and during the automatic lamp control mode setting confirmation step, When the lamp control is set to the automatic mode, the peripheral brightness detection step of detecting the brightness of the surroundings of the mobile phone and the ambient brightness signal of the mobile phone currently detected after the ambient brightness detection step are used to calculate the appropriate brightness level data of the display device. A display device calculated after the proper brightness level data calculation step and the appropriate brightness level data calculation step According to the static brightness level data of the present invention, there is provided a mobile phone equipped with an LCD lighting automatic adjustment function comprising an automatic lamp adjustment step of adjusting the illumination brightness level of the display device in multiple steps.

1 is an explanatory diagram illustrating a conventional mobile phone.

2 is an explanatory diagram illustrating a mobile phone of the present invention.

3 is a flowchart of the present invention.

<Detailed Description of Codes>

1: mobile phone 2: detection sensor

3: A / D converter 4: Mapping unit

5 control unit 6 key panel unit

7: key button lighting control unit 8: LCD

9: LCD Driver 10: Handset

11: codec 12: RF module

13: memory 14: mobile phone

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The mobile phone of the present invention is installed in a suitable place outside of the mobile phone 1 as shown in FIG. 2 and detects the ambient brightness as an electrical signal, and the ambient brightness of the analog detected from the detection sensor 2. An A / D converter 3 for converting the detected signal into a digital signal and outputting the digital signal, a mapping unit 4 for mapping and outputting the ambient brightness detection signal inputted from the A / D converter 3 into an 8-bit value; A control unit 5 which compares the ambient light detection signal input through the mapping unit 4 with a predetermined ambient light level reference data to calculate a proper light level control signal and controls overall functions of the mobile phone 1; The key panel unit 6 for inputting a function setting signal of the user to the controller 5 and the key button background light of the key panel unit 6 according to the key button proper illumination level control signal of the controller 5. Key button lighting control unit 7 for controlling the The control unit 5 and the LCD display control signal lamp comprises a LCD driving driver 9, which controls the display and illumination of the LCD (8) in multiple stages in accordance with the appropriate light level of the control signal.

In addition, at one end of the control unit 5, a codec 11 for processing a voice signal input and output through the handset 10 and an RF module 12 for RF modulating or demodulating a communication signal input and output via the codec 11. ) Is connected.

In addition, one end of the control unit 5 is connected to a memory unit 13 for storing various types of information, including the reference brightness level reference data of the lamp of the LCD 8 or the key button lamp of the key panel unit 6.

Next, the operation and effects of the present invention as described above will be described.

The mobile phone 1 of the present invention proceeds to the menu function setting determination step S2 in the initial state S1 as shown in FIG. 3 to determine whether the menu function is newly set in the current mobile phone. If the menu function is not newly set as a result of the determination in the menu function setting determination step (S2), the process proceeds to the general call mode execution step (S3) to execute the normal general call mode.

That is, when the user wants to make a phone call, the user inputs the phone number through the key panel unit 6. In this case, the control unit 5 recognizes this and processes the RF signal through the RF module 12 and then the base station. (Not shown) forms a call with the other party's mobile phone (1). Then, when the user speaks the necessary voice through the handset 10 of his mobile phone 1, the user's voice is input to the codec 11 of the mobile phone 1. In addition, the codec 11 converts a voice signal of the user input through the handset 10 into a voice signal processing, for example, an analog voice signal into a digital signal and inputs it to the RF module 12. Then, the RF module 12 processes the RF signal from the digital voice signal input from the codec 11 and transmits the RF signal to the mobile phone 14 of the other party to perform a normal voice call.

On the other hand, if it is determined during the menu function setting determination step (S2) that the menu function is newly set, the process proceeds to the automatic lamp control mode setting determination step (S4) to determine whether the lamp control of the current display device is set to the automatic mode. . At this time, when the automatic lamp control mode setting determination step (S4) determines that the lamp control of the current display device is not set to the automatic mode, the operation proceeds to the preset mode operation step (S5) and the lamp level of the previously set display device. To control the lamp of the display device. However, as a result of the determination during the automatic lamp control mode setting determination step (S4), when the lamp control of the current display device is set to the automatic mode, the peripheral brightness detection step (S6) is performed to detect the brightness around the mobile phone. After the peripheral brightness detection step S6, the controller proceeds to calculating the appropriate brightness level data step S7 to calculate the appropriate brightness level data of the display device by using the ambient brightness signal of the currently detected mobile phone. In addition, after the appropriate brightness level data calculation step S7, the automatic lamp control step S8 is performed to adjust the illumination brightness level of the display device in multiple stages according to the calculated static brightness level data of the display device.

That is, when the user opens the menu screen, the operating state of the key button lamp of the display device, for example, the LCD 8 or the key panel unit 6, is controlled by, for example, "1. Off, 2. On, 3. On for a few seconds. , 4. "Only at night" setting, regardless of the ambient brightness of the mobile phone 1, the control unit 5 stores the set function in the memory unit 13 and then the LCD (8) or key The key button lamp of the panel unit 6 is driven.

However, when the user of the mobile phone 1 sets the lamp level of the display device to the automatic mode, the control unit 5 detects the ambient brightness of the mobile phone 1 through the detection sensor 2.

Then, the analog ambient brightness signal detected by the detection sensor 2 is converted into a digital signal by the A / D converter 3 and output to the mapping unit 4. The mapping unit 4 maps the input ambient brightness detection signal to a value of 0 to 255 of 8 bits, for example, and outputs it to the control unit 5.

Here, the ambient brightness signal detected by the detection sensor 2 is subdivided and detected according to the brightness and darkness of the surroundings of the mobile phone 1.

Then, the control unit 5 compares the ambient brightness signal of the mobile phone 1 input through the mapping unit 4 with the ambient brightness level reference data previously stored in the memory unit 13 to determine which illumination range is presently detected. It is determined whether or not to enter, and the appropriate illumination level signal is calculated and output to the LCD driving driver 9 and the key button illumination control unit 5, respectively.

At this time, if the user uses the LCD (8), the LCD driver 9 drives the lamp of the LCD (8) in accordance with the appropriate light level signal currently input from the control unit (5). In addition, the key button lighting control unit 5 also drives the key button background lamp of the key panel unit 6 in accordance with the appropriate illumination level signal input from the current control unit 5.

Therefore, the brightness of the background light of the display device of the mobile phone 1, for example, the brightness of the lamp of the LCD 8 or the key button background lamp of the key panel unit 6 is adjusted in proportion to the current brightness of the surroundings of the mobile phone 1. do.

For example, if the surrounding of the mobile phone 1 is bright, the brightness of the lamp of the display device will be relatively decreased by the set value. On the other hand, if the surrounding of the mobile phone 1 is ENQ, the brightness of the lamp of the display device is relatively It will be brighter by the set value. That is, the illumination of the display devices 6 and 8 is adjusted according to the brightness of the surroundings of the mobile phone 1.

As described above, the present invention is provided with a sensor on the outside of the mobile phone to detect the ambient brightness and automatically adjust the illumination of the LCD to the brightness level proportional to the detected value, unnecessary power consumption of the LCD lighting This has the advantage of significantly improving the power saving function of the mobile phone battery.

In addition, according to the present invention, since the background light of the key buttons is also adjusted in multiple stages using the detected ambient brightness level signal, the functionality of the mobile phone is also significantly improved.

Claims (3)

A detection sensor installed at a suitable place outside the mobile phone to detect ambient brightness as an electric signal, an A / D converter for converting an analog ambient brightness detection signal detected by the detection sensor into a digital signal, and outputting the digital signal, and the A / D A proper brightness level control signal is calculated by comparing an ambient brightness detection signal input from the converter to an 8-bit value and outputting the mapping unit, and comparing the ambient brightness detection signal inputted through the mapping unit with preset ambient brightness level reference data. And a LCD driver for controlling the display and illumination of the LCD in multiple stages according to the display control signal and the LCD lamp proper lighting level control signal of the controller. Mobile phone with automatic lighting control. The LCD lighting automatic adjustment function according to claim 1, wherein one end of the control unit is connected to a key button lighting control unit which controls the key button background lighting of the key panel unit in multiple stages according to the key button proper lighting level control signal of the control unit. Equipped mobile phone. The lamp level automatic mode setting confirmation step of confirming whether the lamp level of the display device is set to the automatic mode in the mobile phone, and the lamp control of the display device is not currently set to the automatic mode by the automatic lamp control mode setting confirmation step. If it is confirmed, the preset mode operation step of controlling the lamp of the display device in the lamp control mode of the existing display device, and if the lamp control of the current display device is set to the automatic mode during the automatic lamp control mode setting confirmation step, An appropriate brightness level data calculating step of calculating an appropriate brightness level data of a display device using an ambient brightness detection step of detecting ambient brightness, an ambient brightness signal of a mobile phone currently detected after the ambient brightness detection step, and the appropriate brightness After the level data calculation step, the display device according to the calculated static brightness level data of the display device Name brightness level to the control method of a cellular phone provided with a LCD backlight automatic control, characterized in that consisting of automatic lamp control step of controlling in multiple steps.