JP2005039763A - Backlight control system, its method, and its program for cellular phone with camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power consumption by controlling the luminance of a backlight in an LCD part and controlling the ON/OFF of a backlight in a key operating part in accordance with an image pickup frame rate. <P>SOLUTION: The present invention includes an image pickup frame rate detection function for detecting the image pickup frame rate of image data outputted by a camera module, a backlight luminance value table for setting a control luminance value level for the backlight in the LCD part and ON/OFF information of the backlight in the key operating part in accordance with a plurality of frame rates, an LCD backlight control function for detecting the luminance value level and the ON/OFF information corresponding to the image pickup frame rate detected by the image pickup frame rate detection function from the backlight luminance value table and controlling the backlight in the LCD part according to the detected luminance value level, and a key operating part backlight control function for controlling the ON/OFF of the backlight in the key operating part according to the detected ON/OFF information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight control method and method for a camera-equipped mobile phone, and a program therefor, and in particular, the brightness of the backlight of the LCD display unit according to the imaging frame rate of the camera unit The present invention relates to control and backlight on / off control of an operation unit.

  Since mobile terminals such as mobile phones use batteries as the power supply source, reduction of current consumption is an indispensable element, and reduction in the number of parts used in connection with miniaturization and weight reduction is considered necessary .

  In recent years, color LCDs have been used for LCD displays of mobile phones. When displaying on the color LCD, the backlight is turned on to ensure visibility. In particular, in a transmission-oriented color LCD, the backlight lighting brightness greatly affects the visibility of the LCD display.

  In general, a mobile phone having a camera function has a switching function of an imaging frame rate, and outputs image data by switching an imaging frame corresponding to an imaging environment (ambient brightness).

  Further, in a mobile phone having a camera function, an LCD display unit is used for the camera finder, and the backlight is always lit to ensure the visibility of the LCD display while the camera is activated.

  In addition, in a mobile phone with a camera function having a camera light, in camera shooting when the camera light is lit, brightness detection is performed by a component that detects ambient brightness such as a light sensor and the backlight luminance is switched. .

However, this backlight control method has the following problems.
The first problem is that the brightness value of the backlight when displaying the camera finder can be lowered even if visibility is taken into consideration because there is no reflected light and it is not affected by it in a dark environment. Since the luminance value is set in consideration of the visibility in a use environment such as under fluorescent light or sunlight, there is a problem that more current is consumed in a dark place.

  The second problem is that the brightness of the backlight is improved by adding parts that detect ambient brightness, such as a light sensor, and detecting the brightness and switching the backlight brightness. Although there is a switching control method, the ambient brightness detection by the optical sensor makes a light / dark determination based on the threshold value, so an A / D converter, an optical sensor, etc. for dealing with a plurality of threshold values Therefore, it is necessary to add these parts, which is a factor that hinders downsizing of the mobile phone.

  As a third problem, in the case of a mobile phone having a camera light, when the camera light is turned on, the optical sensor may not be able to accurately detect the ambient brightness by the light of the camera light. As a result, it is detected that the key backlight is bright even in a dark environment where the key backlight needs to be turned on, and the key backlight is turned off.

  Therefore, a technique for controlling a backlight that controls the illumination level (luminance) of a liquid crystal display (LCD) according to ambient brightness without changing the existing hardware configuration is desired.

  A technique related to backlight control for controlling the irradiation level of such a liquid crystal display according to the ambient brightness is proposed in the following publication.

  If the surroundings are relatively bright, the exposure of the camera will be relatively small.Therefore, the illumination level of the backlight that illuminates the liquid crystal display is set to be high. Since the exposure of the LCD becomes relatively large, the display information on the liquid crystal display can be accurately recognized according to the ambient brightness by setting the illumination level of the backlight that illuminates the liquid crystal display to be small. A display terminal with a camera is disclosed in, for example, Japanese Patent Laid-Open No. 2002-344598 (first prior art).

  The adjustment of the irradiation level according to the first prior art is performed at timings such as key operation when the user selects a camera function, automatic detection of a paging channel, and the like.

  When the camera-equipped mobile phone is turned on, the CPU detects the user's key operation signal and sends an accumulation time request signal to the camera. The camera calculates the accumulation time in response to the accumulation time request signal, and accumulates the accumulation time. Is returned to the CPU.

  The CPU determines the operating current of the backlight LED based on the storage time included in the storage time signal, determines the irradiation level of the liquid crystal display, and performs irradiation.

  At this time, since the exposure in the camera depends on the ambient brightness, the accumulation time also depends on the ambient brightness.

  When the accumulation time included in the accumulation time signal is relatively short, the CPU determines the operation current of the backlight LED relatively large, determines the irradiation level of the liquid crystal display relatively large, and accumulates When the time is relatively long, the LED operating current is determined to be relatively small, the irradiation level of the liquid crystal display is determined to be relatively small, and if the liquid crystal display is in an unirradiated state, irradiation is started. If there is, the irradiation level is changed to a new irradiation level.

  However, although the irradiation level of the liquid crystal display is controlled based on the accumulation time of the imaging information synchronized with the exposure of the camera that changes in accordance with the ambient brightness, a method for calculating the accumulation time in the camera is not described.

  In addition, there is a description that the CPU determines that the irradiation rel is relatively large when the accumulation time is relatively short and the irradiation rel is relatively small when the accumulation time is relatively long. The specific correspondence of is not described.

JP 2002-344598 A (paragraph number 0009, paragraph number 0021, paragraph number 0031) Further, the ambient brightness is detected by estimating the ambient brightness based on a control signal for controlling the exposure of the camera. A camera-equipped mobile terminal capable of saving power and controlling the brightness of a display device in accordance with ambient brightness without providing a separate detector is disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-300447 ( Second prior art).

  This second prior art calculates the shutter speed and the amplified value of the CCD output data so that the photometric evaluation value measured based on the output data of the image sensor (CCD) matches the preset target luminance value, and the CCD Output data is amplified to a predetermined level, the CCD is driven at a predetermined shutter speed, the ambient brightness is calculated based on the photometric evaluation value, the amplified value, and the shutter speed value, and the brightness of the backlight of the display device By controlling the above, the exposure of the CCD is properly controlled, the power consumption of the backlight is reduced, and the battery life of the portable terminal can be extended.

JP-A-2002-300447 (paragraph number 0021, paragraph number 0022, paragraph number 0026 to paragraph 0037, FIG. 4) Further, a frame rate value and moving image data compression means in moving image pickup by a moving image pickup means such as a CCD camera A portable information terminal device that adjusts the value of the frame rate in the compression processing of moving image data by the external operation or the remaining capacity of the battery is disclosed in, for example, Japanese Patent Laid-Open No. 10-248063 (third conventional example) Technology).

The third prior art includes a frame rate adjustment knob for the user to adjust the frame rate of the moving image data, and the user can set a frame rate so that the moving image of a video phone, for example, about 15 frames is set to a lower frame rate. The desired low frame rate can be set by operating the rate adjustment knob, and the power consumption is reduced and the battery duration is extended by lowering the frame rate.
In addition, when the frame rate is set low in moving image transmission, the operating frequency of the CCD camera decreases, the moving image sampling rate decreases, and the power consumption of the CCD camera decreases.

  Also in the image data compression process, the operating frequency is set low, and the power consumption can be reduced.

JP 10-248063 A (paragraph number 0019 to paragraph number 0023, paragraph number 0033, paragraph number 0054, paragraph number 0055)

  In the first prior art described above, when the camera-equipped mobile phone is powered on, the CPU detects the user's key operation signal and sends an accumulation time request signal to the camera, and the camera responds to the accumulation time request signal. The accumulation time is calculated, the accumulation time signal including the accumulation time is received, the operating current of the backlight LED is determined based on the accumulation time included in the accumulation time signal, the irradiation level of the liquid crystal display is determined, and the irradiation is performed. In order to determine the illumination level of the liquid crystal display based on the accumulation time calculated by the camera based on the user's key operation, the camera needs to have an accumulation time calculation function, and the CPU receives the accumulation time received from the camera. Detection function is required.

  Further, the calculation method of the accumulation time in the camera is unknown, and the CPU determines the irradiation level relatively large when the accumulation time is relatively short, and the irradiation level relatively small when the accumulation time is relatively long. Although there is a description to do so, a specific correspondence between the accumulation time and the irradiation level is not described.

  Also, a key operation signal is detected when the user selects a camera function, and an accumulation time request signal is sent to the camera. The camera calculates an accumulation time in response to the accumulation time request signal, and an accumulation time signal including the accumulation time. When the ambient environment changes (for example, from a bright state to a dark state) before the user activates the camera function and performs an operation to drive the shutter while the viewfinder is displayed. The effect cannot be obtained.

  The second prior art described above calculates the shutter speed and the amplification value of the CCD output data so that the photometric evaluation value measured based on the output data of the image sensor (CCD) matches the preset target luminance value, The output data of the CCD is amplified to a predetermined level and the CCD is driven at a predetermined shutter speed, the ambient brightness is calculated based on the photometric evaluation value, the amplified value, and the shutter speed value, and the brightness of the backlight of the display device By controlling the exposure of the CCD, while controlling the exposure of the CCD appropriately, the power of the backlight can be saved and the battery life of the portable terminal can be extended. Although the detection function is not required, the shutter speed comparison process that compares the shutter speed with the reference value (reference speed), the gain of the CCD output data is the reference value (reference gain) Complicated processing such as gain comparison processing to compare with, photometry evaluation value calculation processing to measure the photometric evaluation value of the CCD output data, and photometry evaluation value comparison processing to compare the photometry evaluation value with the target luminance value is required .

  Further, the backlight control is to turn on / off the backlight based on a certain fixed value, and it is difficult to perform the backlight control with accuracy according to the surrounding environment.

  The third prior art described above includes a frame rate adjustment knob for the user to adjust the frame rate of moving image data. The user can set a frame rate adjustment knob, for example, to set a moving image of about 15 frames to a lower frame rate. Is used to set the desired low frame rate, and the frame rate change is not performed automatically by detecting the surrounding brightness. It is intended to save power by changing to.

  An object of the present invention is to provide a camera module that switches an imaging frame rate according to illuminance and a mobile phone having a backlight luminance adjustment function, and without changing the hardware configuration of an existing mobile phone, the backlight of the LCD display unit according to the imaging frame rate. It is intended to provide a backlight control method, a method thereof, and a program thereof that can reduce current consumption of the mobile phone by performing brightness control of the display and turning on / off the backlight of the key operation unit.

  Another object of the present invention is to provide a backlight control method, a method thereof, and a program thereof suitable for the use environment by accurately detecting the ambient brightness by setting the backlight brightness corresponding to the camera light lighting. It is in.

  The backlight control method of the camera-equipped mobile phone according to the present invention is a mobile phone having a backlight module brightness adjustment function and a camera module that outputs an image data by switching an imaging frame rate that is an image capturing period according to an imaging environment. An imaging frame rate detection unit that detects the imaging frame rate of the image data output from the camera module, and a backlight that controls the luminance of the backlight according to the imaging frame rate detected by the imaging frame rate detection unit It has a control means.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detection unit that detects a frame rate, and an LCD backlight control unit that controls the luminance of the backlight of the LCD display unit according to the imaging frame rate detected by the imaging frame rate detection unit To do.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detecting means for detecting a frame rate; an LCD backlight control means for controlling the luminance of the backlight of the LCD display section in accordance with the imaging frame rate detected by the imaging frame rate detecting means; And an operation unit backlight control unit that controls light emission of the backlight or stop of the light emission.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detecting means for detecting a frame rate; a backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates; LCD backlight control means for detecting the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means from the backlight luminance value table and controlling the backlight of the LCD display unit. It is characterized by.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detection means for detecting a frame rate, a backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates; When the camera module is activated, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection unit is detected from the backlight luminance value table, and the driving current corresponding to the detected luminance level is used to detect the luminance level. Let the backlight of the LCD display emit light, When the imaging frame rate detecting means detects a change in the imaging frame rate while the camera module is activated, the luminance level corresponding to the changed imaging frame rate is detected from the backlight luminance value table, and this newly LCD backlight control means for causing the backlight of the LCD display unit to emit light with a driving current corresponding to the detected luminance level.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detecting means for detecting a frame rate, and a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates and the light emission or light emission of the key operation unit backlight A backlight luminance value table in which ON or OFF information for controlling stop is set in advance, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means, and the ON or OFF information. It is detected from the backlight brightness value table and detected. LCD backlight control means for controlling the backlight of the LCD display unit according to the brightness level, and an operation unit backlight for controlling light emission or stop of light emission of the key operation unit according to the detected ON or OFF information And a control means.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging of the image data output by the camera module An imaging frame rate detecting means for detecting a frame rate, and a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates and the light emission or light emission of the key operation unit backlight A backlight luminance value table in which ON or OFF information for controlling stop is set in advance, and the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means when the camera module is activated The backlight brightness value is the ON or OFF information. The backlight of the LCD display unit is caused to emit light by a drive current corresponding to the detected brightness level, and the backlight of the key operation unit is caused to emit light or stop light according to the detected ON or OFF information. When the imaging frame rate detection means detects a change in the imaging frame rate while the camera module is activated, the backlight luminance value and the brightness level corresponding to the changed imaging frame rate and the ON or OFF information are displayed. The backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level detected from the table, and the backlight of the key operation unit is emitted based on the newly detected ON or OFF information. Or backlight control means to stop the light emission , Characterized by having a.

  Further, the backlight luminance level set in advance in the backlight luminance value table is set lower when the imaging environment is dark and the imaging frame rate is low than when the imaging environment is bright and the imaging frame rate is high. It is characterized by keeping.

  The backlight ON or OFF information set in advance together with the backlight luminance level of the backlight luminance value table is set to backlight OFF information when the imaging environment is bright and the imaging frame rate is high, When the imaging environment is dark and the imaging frame rate is low, backlight ON information is set.

  Further, the brightness value level and ON / OFF information preset in the backlight brightness value table can be arbitrarily set by a user.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a user may need to A camera light that is turned on and off, an imaging frame rate detecting means for detecting the imaging frame rate of the image data output by the camera module, and a backlight brightness of the LCD display unit corresponding to a plurality of frame rates. A backlight luminance value table in which a predetermined luminance level for control is set in advance corresponding to ON / OFF of the camera light, ON / OFF of the camera light is detected, and the imaging frame rate detecting means The camera light corresponding to the imaging frame rate to be detected Detecting the brightness level corresponding to ON or OFF from the backlight luminance value table, and having a a LCD backlight control means for controlling the brightness of the backlight of the LCD display unit.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a user may need to A camera light that is turned on and off, an imaging frame rate detecting means for detecting the imaging frame rate of the image data output by the camera module, and a backlight brightness of the LCD display unit corresponding to a plurality of frame rates. A backlight luminance value table that presets a predetermined luminance level for control corresponding to ON / OFF of the camera light, and when the camera module is activated, detects ON / OFF of the camera light, The imaging frame rate detected by the imaging frame rate detection means. Detecting the brightness level corresponding to ON or OFF of the camera light corresponding to the light from the backlight brightness value table, and causing the backlight of the LCD display unit to emit light by the drive current corresponding to the detected brightness level, When the imaging frame rate detection means detects a change in the imaging frame rate while the camera module is activated, the backlight level is set to the brightness level corresponding to ON or OFF of the camera light corresponding to the changed imaging frame rate. LCD backlight control means for detecting light from the brightness value table and causing the backlight of the LCD display unit to emit light with a drive current corresponding to the newly detected brightness level.

  In addition, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a user may need to A camera light that is turned ON and OFF, an imaging frame rate detection means for detecting the imaging frame rate of the image data output by the camera module when the camera module is activated, and an LCD corresponding to the plurality of frame rates A predetermined luminance level for controlling the luminance of the backlight of the display unit and ON / OFF information for controlling the light emission of the backlight of the key operation unit or the stop of the light emission correspond to ON or OFF of the camera light. The backlight brightness value table set in advance and ON / OFF of the camera light is detected, and the brightness level corresponding to the ON / OFF of the camera light corresponding to the imaging frame rate detected by the imaging frame rate detection means and the backlight of the key operation unit ON / OFF LCD backlight control means for detecting OFF information from the backlight luminance value table and controlling the backlight of the LCD display unit according to the detected luminance level, backlight of the key operation unit based on the detected ON or OFF information Operating portion backlight control means for controlling light emission or light emission stop.

  Also, in a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight brightness adjustment function, a user may need to ON / OFF camera light, imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and brightness of the backlight of the LCD display unit corresponding to a plurality of frame rates A backlight in which a predetermined brightness level for control and ON or OFF information for controlling light emission of the backlight of the key operation unit or light emission stop are set in advance corresponding to ON or OFF of the camera light. A brightness value table and the camera module when the camera module is activated; The brightness level of the LCD backlight and the ON / OFF of the operation unit backlight corresponding to the ON / OFF of the camera light corresponding to the imaging frame rate detected by the imaging frame rate detecting means is detected. OFF information is detected from the backlight luminance value table, the backlight of the LCD display unit is caused to emit light by a driving current corresponding to the detected luminance level, and the backlight of the key operation unit is detected based on the detected ON or OFF information. When the imaging frame rate detection means detects a change in the imaging frame rate while the camera module is activated, the camera light corresponding to the changed imaging frame rate is turned on or off. Back of the LCD display unit according to The brightness level of the LCD and the ON / OFF information of the key operation unit are detected from the backlight brightness value table, and the brightness of the backlight of the LCD display unit is controlled based on the newly detected brightness level. Backlight control means for emitting or stopping light emission of the backlight of the key operation unit according to the detected ON or OFF information.

  Further, the brightness level of the backlight of the LCD display unit set in advance in the backlight brightness value table corresponds to ON / OFF of the camera light, and the imaging environment when the camera light is OFF is dark. The luminance level of the backlight when the imaging frame rate is low is set lower than the luminance level of the backlight when the imaging environment is bright and the imaging frame rate is high, and the imaging environment when the camera light is on is The luminance level of the backlight when the imaging frame rate is bright and high is set lower than the luminance level of the backlight when the imaging environment is bright and the imaging frame rate is high when the backlight is OFF. It is characterized by.

  Also, the ON information or OFF information of the backlight of the operation unit set in advance together with the backlight luminance level of the backlight luminance value table corresponds to ON / OFF of the camera light, and the camera light is OFF. When the imaging environment is bright and the imaging frame rate is high, the backlight of the operation unit is set to OFF, and when the imaging environment is dark and the imaging frame rate is low, the backlight of the operation unit is set to ON It is characterized by keeping.

  Further, the brightness value level of the backlight of the LCD display unit and the ON information or OFF information of the operation unit, which are set in advance in the backlight luminance value table corresponding to ON / OFF of the camera light, are arbitrarily set by the user. It is possible.

  A backlight control method for a camera-equipped cellular phone according to the present invention is a cellular phone including a camera module that outputs an image data by switching an imaging frame rate that is an image capture period according to an imaging environment, and a backlight luminance adjustment function. A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates, the camera module being activated and the LCD display unit being When in the finder display state, the first step of detecting the imaging frame rate of the camera module and the imaging frame rate of the camera module detected in the first step by searching the backlight luminance value table A second step for detecting the corresponding predetermined brightness level. A third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level; and a user key operation or a predetermined time A fourth step of monitoring the stop of activation of the camera module due to the progress, and when the camera module detects activation in the fourth step, the detection of the imaging frame rate of the camera module is continued, and the imaging frame A fifth step for detecting a change in rate, and a luminance level corresponding to the changed frame rate from the backlight luminance value table when the change in the imaging frame rate is detected in the fifth step. And the LCD display by the drive current corresponding to the newly detected luminance level. After the backlight is turned on, the process from the fourth step to the fifth step is executed, and when the change in the frame rate is not detected in the fifth step, the process proceeds to the fourth step. When the stop of the camera module activation due to the user's key operation or the elapse of a predetermined time is detected in the step, the finder display of the LCD display unit is stopped and switched to a predetermined default display, and the camera module activation is stopped And a sixth step.

  In addition, in a mobile phone having a camera module that switches an imaging frame rate that is an image capturing period according to an imaging environment and outputs image data and a backlight brightness adjustment function, an LCD display unit that supports a plurality of frame rates A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight and ON or OFF information for controlling light emission of the backlight of the key operation unit or stop of light emission. When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module and a first step of searching the backlight luminance value table Corresponding to the imaging frame rate of the camera module detected in A second step of detecting the luminance level, and a third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level. And a step of searching the backlight luminance value table and detecting ON / OFF information of the backlight of the key operation unit corresponding to the imaging frame rate of the camera module detected in the first step. And when the ON information is detected in the fourth step, the detected ON information is notified to the backlight unit of the key operation unit, and the backlight is instructed to emit light. When the backlight OFF information of the key operation unit is detected, the detected OFF information is notified to the backlight unit of the key operation unit. A sixth step for instructing the stop of backlight emission, a seventh step for monitoring a stop of activation of the camera module by a user's key operation or a lapse of a predetermined time, and the camera module being activated in the seventh step; When detecting the inside, the detection of the imaging frame rate of the camera module is continued, and an eighth step of detecting a change in the imaging frame rate and a change in the imaging frame rate in the eighth step are detected. The process proceeds to step 2, and the brightness level corresponding to the imaging frame rate changed from the backlight brightness value table is detected in the brother 2 step, and in the third step, the brightness level corresponding to the newly detected brightness level is detected. After the backlight of the LCD display unit is caused to emit light by the driving current, the fourth step to the eighth step When the change in the frame rate is not detected in the eighth step, the process proceeds to the seventh step. In the seventh step, the activation of the camera module by the user's key operation or a predetermined time elapses. And an eighth step of stopping the finder display of the LCD display unit, switching to a predetermined default display, and stopping the activation of the camera module when the stop is detected.

  In addition, in a mobile phone having a camera module that outputs an image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, an LCD display unit that supports a plurality of frame rates is provided. A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight; and when the camera module is activated and the LCD display unit is in a finder display state, the camera module A first step of detecting an imaging frame rate, a second step of detecting whether or not a camera light that is turned ON / OFF by a user when the camera module is activated, and a second step. Searches the backlight brightness value table when the camera light is turned off The predetermined brightness level when the camera light corresponding to the imaging frame rate of the camera module detected in the first step is turned off is detected, and the detected brightness level is detected by the backlight unit of the LCD display unit. When the lighting of the camera light is detected in the third step and the second step of instructing light emission by the driving current corresponding to the luminance level, the first step is performed by searching the backlight luminance value table. Detecting the predetermined luminance level when the camera light is lit corresponding to the imaging frame rate of the camera module detected in the step, and notifying the detected luminance level to a backlight unit of the LCD display unit; A fourth step for instructing light emission by a driving current corresponding to the level, and a user key operation or a predetermined time A fifth step of monitoring the stop of activation of the camera module by the step, and when the activation of the camera module is detected in the fifth step, the detection of the imaging frame rate of the camera module is continued, and the imaging frame rate A sixth step for detecting a change in the first and a second step when the change in the imaging frame rate is detected in the sixth step, and when the turn-off of the camera light is detected in the second step, A brightness level when the camera light is turned off corresponding to the frame rate detected in the sixth step is detected from a backlight brightness value table, and the LCD display unit is detected by a drive current corresponding to the newly detected brightness level. When the lighting of the camera light is detected in the second step, the backlight is turned on. The brightness level when the camera light is turned on corresponding to the frame rate detected in the sixth step is detected from the Crite brightness value table, and the LCD display unit is detected by the drive current corresponding to the newly detected brightness level. After the backlight is turned on, the processing from the fifth step to the sixth step is executed, and when the change in the frame rate is not detected in the sixth step, the process proceeds to the fifth step and the fifth step When the stop of activation of the camera module due to the user's key operation or the elapse of a predetermined time is detected, the viewfinder display of the LCD display unit is stopped and switched to a predetermined default display, and the activation of the camera module is stopped. And a backlight control method for a camera-equipped mobile phone.

  In addition, in a mobile phone having a camera module that switches an imaging frame rate that is an image capturing period according to an imaging environment and outputs image data and a backlight brightness adjustment function, an LCD display unit that supports a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the backlight and ON information or OFF information for controlling light emission of the backlight of the operation unit or stop of light emission are preset. First step of detecting the imaging frame rate of the camera module when the camera module is activated and the LCD display unit is in a finder display state, and the user turns on when necessary while the camera module is activated A second step of detecting whether the camera light to be turned off is on, When the turn-off of the camera light is detected in the step, the backlight brightness value table is searched and the predetermined value when the camera light is turned off corresponding to the imaging frame rate of the camera module detected in the first step A third step of detecting the luminance level, informing the backlight unit of the LCD display unit of the detected luminance level and instructing light emission by a drive current corresponding to the luminance level; and the backlight luminance value table And detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and notifying the detected ON information to the backlight unit of the operation unit The fourth step of instructing the backlight to emit light, and searching the backlight luminance value table The backlight information of the operation unit corresponding to the imaging frame rate of the camera module detected in step 1 is detected, the detected OFF information is notified to the backlight unit of the operation unit, and the backlight emits light. The imaging frame of the camera module detected in the first step by searching the backlight luminance value table when the lighting of the camera light is detected in the fifth step and the second step. A predetermined luminance level when the camera light is lit corresponding to a rate is detected, the detected luminance value level is notified to a backlight unit of the LCD display unit, and light emission by a driving current corresponding to the luminance level is instructed A sixth step, and the camera module detected in the first step by searching the backlight luminance value table; A seventh step of detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of Joule, informing the backlight unit of the operation unit of the detected ON information and instructing the backlight to emit light; The backlight brightness value table is searched to detect backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and the detected OFF information is used as the operation The eighth step of notifying the backlight unit of the unit and instructing the stop of the backlight emission, the instruction of the operation unit backlight emission in the fourth step or the seventh step, the fifth step or the eighth step After the instruction to stop the light emission of the operation unit backlight in the step, the camera is operated by a user key operation or a predetermined time. A ninth step of monitoring the stop of the activation of the module, and when detecting the activation of the camera module in the ninth step, the detection of the imaging frame rate of the camera module is continued, and the change of the imaging frame rate is detected. A tenth step to detect, and a transition to the second step when the change in the imaging frame rate is detected in the tenth step, and a third step when the turning off of the camera light is detected in the second step. The brightness level when the camera light is turned off corresponding to the imaging frame rate detected in the tenth step is detected from the backlight brightness value table, and the LCD is detected by the drive current corresponding to the newly detected brightness level. After causing the backlight of the display unit to emit light and executing the process of the fourth step or the fifth step Alternatively, when the lighting of the camera light is detected in the second step, the luminance level at the time of lighting the camera light corresponding to the imaging frame rate detected in the tenth step from the backlight luminance value table in the sixth step is determined. After the detection, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level, the sixth step or the seventh step is executed, and then the ninth step, The process of step 10 is executed, and when the change in the frame rate is not detected in the tenth step, the process proceeds to the ninth step, and in the ninth step, the camera module When the stop of the start is detected, the finder display on the LCD display unit is stopped and the predetermined default display is displayed. And an eleventh step of stopping the activation of the camera module.

  A backlight control program for a camera-equipped cellular phone according to the present invention is a cellular phone including a camera module that outputs an image data by switching an imaging frame rate that is an image capturing period according to an imaging environment, and a backlight luminance adjustment function. A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates, the camera module being activated and the LCD display unit being When in the finder display state, the first step of detecting the imaging frame rate of the camera module and the imaging frame rate of the camera module detected in the first step by searching the backlight luminance value table A second detecting the corresponding predetermined brightness level; A third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level; A fourth step of monitoring the stop of activation of the camera module over time, and when the camera module detects activation in the fourth step, the detection of the imaging frame rate of the camera module is continued, and the imaging A fifth step for detecting a change in the frame rate, and a luminance corresponding to the changed frame rate from the backlight luminance value table when the change in the imaging frame rate is detected in the fifth step. The level is detected, and the LC is detected by the driving current corresponding to the newly detected luminance level. After the backlight of the display unit is caused to emit light, the process from the fourth step to the fifth step is executed, and when the change in the frame rate is not detected in the fifth step, the process proceeds to the fourth step. In the fourth step, when it is detected that the user has stopped operating the camera module due to a key operation or a lapse of a predetermined time, the finder display on the LCD display unit is stopped and switched to a predetermined default display to start the camera module. The CPU executes the sixth step to stop.

  In addition, in a mobile phone having a camera module that switches an imaging frame rate that is an image capturing period according to an imaging environment and outputs image data and a backlight brightness adjustment function, an LCD display unit that supports a plurality of frame rates A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight and ON or OFF information for controlling light emission of the backlight of the key operation unit or stop of light emission. When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module and a first step of searching the backlight luminance value table Corresponding to the imaging frame rate of the camera module detected in A second step of detecting the luminance level, and a third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level. And a step of searching the backlight luminance value table and detecting ON / OFF information of the backlight of the key operation unit corresponding to the imaging frame rate of the camera module detected in the first step. And when the ON information is detected in the fourth step, the detected ON information is notified to the backlight unit of the key operation unit, and the backlight is instructed to emit light. When the backlight OFF information of the key operation unit is detected, the detected OFF information is notified to the backlight unit of the key operation unit. A sixth step for instructing the stop of backlight emission, a seventh step for monitoring a stop of activation of the camera module by a user's key operation or a lapse of a predetermined time, and the camera module being activated in the seventh step; When detecting the inside, the detection of the imaging frame rate of the camera module is continued, and an eighth step of detecting a change in the imaging frame rate and a change in the imaging frame rate in the eighth step are detected. The process proceeds to step 2, and the brightness level corresponding to the imaging frame rate changed from the backlight brightness value table is detected in the brother 2 step, and in the third step, the brightness level corresponding to the newly detected brightness level is detected. After the backlight of the LCD display unit is caused to emit light by the driving current, the fourth step to the eighth step When the change in the frame rate is not detected in the eighth step, the process proceeds to the seventh step. In the seventh step, the activation of the camera module by the user's key operation or a predetermined time elapses. When the stop is detected, the finder display on the LCD display unit is stopped and switched to a predetermined default display, and the eighth step of stopping the activation of the camera module is executed by the CPU.

  In addition, in a mobile phone having a camera module that outputs an image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, an LCD display unit that supports a plurality of frame rates is provided. A backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight; and when the camera module is activated and the LCD display unit is in a finder display state, the camera module A first step of detecting an imaging frame rate, a second step of detecting whether or not a camera light that is turned ON / OFF by a user when the camera module is activated, and a second step. Searches the backlight brightness value table when the camera light is turned off The predetermined brightness level when the camera light corresponding to the imaging frame rate of the camera module detected in the first step is turned off is detected, and the detected brightness level is detected by the backlight unit of the LCD display unit. When the lighting of the camera light is detected in the third step and the second step of instructing light emission by the driving current corresponding to the luminance level, the first step is performed by searching the backlight luminance value table. Detecting the predetermined luminance level when the camera light is lit corresponding to the imaging frame rate of the camera module detected in the step, and notifying the detected luminance level to a backlight unit of the LCD display unit; A fourth step for instructing light emission by a driving current corresponding to the level, and a user key operation or a predetermined time A fifth step of monitoring the stop of activation of the camera module by the step, and when the activation of the camera module is detected in the fifth step, the detection of the imaging frame rate of the camera module is continued, and the imaging frame rate A sixth step for detecting a change in the first and a second step when the change in the imaging frame rate is detected in the sixth step, and when the turn-off of the camera light is detected in the second step, A brightness level when the camera light is turned off corresponding to the frame rate detected in the sixth step is detected from a backlight brightness value table, and the LCD display unit is detected by a drive current corresponding to the newly detected brightness level. When the lighting of the camera light is detected in the second step, the backlight is turned on. The brightness level when the camera light is turned on corresponding to the frame rate detected in the sixth step is detected from the Crite brightness value table, and the LCD display unit is detected by the drive current corresponding to the newly detected brightness level. After the backlight is turned on, the processing from the fifth step to the sixth step is executed, and when the change in the frame rate is not detected in the sixth step, the process proceeds to the fifth step and the fifth step When the stop of activation of the camera module due to the user's key operation or the elapse of a predetermined time is detected, the viewfinder display of the LCD display unit is stopped and switched to a predetermined default display, and the activation of the camera module is stopped This step is executed by the CPU.

  In addition, in a mobile phone having a camera module that switches an imaging frame rate that is an image capturing period according to an imaging environment and outputs image data and a backlight brightness adjustment function, an LCD display unit that supports a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the backlight and ON information or OFF information for controlling light emission of the backlight of the operation unit or stop of light emission are preset. First step of detecting the imaging frame rate of the camera module when the camera module is activated and the LCD display unit is in a finder display state, and the user turns on when necessary while the camera module is activated A second step of detecting whether the camera light to be turned off is on, When the turn-off of the camera light is detected in the step, the backlight brightness value table is searched and the predetermined value when the camera light is turned off corresponding to the imaging frame rate of the camera module detected in the first step A third step of detecting the luminance level, informing the backlight unit of the LCD display unit of the detected luminance level and instructing light emission by a drive current corresponding to the luminance level; and the backlight luminance value table And detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and notifying the detected ON information to the backlight unit of the operation unit The fourth step of instructing the backlight to emit light, and searching the backlight luminance value table The backlight information of the operation unit corresponding to the imaging frame rate of the camera module detected in step 1 is detected, the detected OFF information is notified to the backlight unit of the operation unit, and the backlight emits light. The imaging frame of the camera module detected in the first step by searching the backlight luminance value table when the lighting of the camera light is detected in the fifth step and the second step. A predetermined luminance level when the camera light is lit corresponding to a rate is detected, the detected luminance value level is notified to a backlight unit of the LCD display unit, and light emission by a driving current corresponding to the luminance level is instructed A sixth step, and the camera module detected in the first step by searching the backlight luminance value table; A seventh step of detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of Joule, informing the backlight unit of the operation unit of the detected ON information and instructing the backlight to emit light; The backlight brightness value table is searched to detect backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and the detected OFF information is used as the operation The eighth step of notifying the backlight unit of the unit and instructing the stop of the backlight emission, the instruction of the operation unit backlight emission in the fourth step or the seventh step, the fifth step or the eighth step After the instruction to stop the light emission of the operation unit backlight in the step, the camera is operated by a user key operation or a predetermined time. A ninth step of monitoring the stop of the activation of the module, and when detecting the activation of the camera module in the ninth step, the detection of the imaging frame rate of the camera module is continued, and the change of the imaging frame rate is detected. A tenth step to detect, and a transition to the second step when the change in the imaging frame rate is detected in the tenth step, and a third step when the turning off of the camera light is detected in the second step. The brightness level when the camera light is turned off corresponding to the imaging frame rate detected in the tenth step is detected from the backlight brightness value table, and the LCD is detected by the drive current corresponding to the newly detected brightness level. After causing the backlight of the display unit to emit light and executing the process of the fourth step or the fifth step Alternatively, when the lighting of the camera light is detected in the second step, the luminance level at the time of lighting the camera light corresponding to the imaging frame rate detected in the tenth step from the backlight luminance value table in the sixth step is determined. After the detection, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level, the sixth step or the seventh step is executed, and then the ninth step, The process of step 10 is executed, and when the change in the frame rate is not detected in the tenth step, the process proceeds to the ninth step, and in the ninth step, the camera module When the stop of the start is detected, the finder display on the LCD display unit is stopped and the predetermined default display is displayed. The CPU is caused to execute the eleventh step of switching and stopping the activation of the camera module.

  As described above, according to the first embodiment of the present invention, the imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and the LCD display corresponding to the plurality of frame rates. A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the backlight of the unit is set in advance, and a luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means when the camera module is activated Is detected from the backlight luminance value table, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the detected luminance level, and the imaging frame rate detecting means detects a change in the imaging frame rate while the camera module is activated. When the brightness level corresponding to the changed imaging frame rate is backlit It is composed of LCD backlight control means which detects from the degree value table and causes the backlight of the LCD display unit to emit light by the drive current corresponding to the newly detected luminance level, so that a bright place such as under sunlight is dark The brightness of the backlight of the LCD display unit can be switched according to the usage environment such as the place.

  Thereby, in a dark place, the luminance value necessary for ensuring the visibility of the LCD can be made lower than that in a bright place such as under sunlight, so that the current consumption can be reduced.

  In addition, when the imaging frame rate changes while the camera module is running, the backlight of the LCD display unit can be made to emit light by the drive current corresponding to the luminance level corresponding to the changed imaging frame rate. Even if the imaging environment changes, the optimal lighting brightness of the LCD display unit corresponding to the change can be obtained.

  According to the second embodiment of the present invention, the imaging frame rate detecting means for detecting the imaging frame rate of the image data output from the camera module, and the backlight of the LCD display unit corresponding to the plurality of frame rates. A backlight luminance value table in which a predetermined luminance level for controlling luminance and ON or OFF information for controlling light emission of the backlight of the key operation unit or light emission stop are set in advance, and the camera module is activated At this time, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means and the ON / OFF information are detected from the backlight luminance value table, and the backlight of the LCD display unit is turned on by the driving current corresponding to the detected luminance level. The key operation unit is backlit according to the detected ON or OFF information. When the imaging frame rate detection function detects a change in the imaging frame rate while the camera module is running, the luminance level corresponding to the changed imaging frame rate and the ON or OFF information are displayed as the backlight luminance value. The backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level detected from the table, and the backlight of the key operation unit is caused to emit or stop emitting light according to the newly detected ON or OFF information. By configuring the backlight control means to be turned on, it is possible to switch the luminance of the backlight of the LCD display unit according to the ambient brightness and to turn on or off the backlight of the key operation unit.

  As a result, when the camera is activated, it is possible to turn off the backlight of the key operation unit that is not necessary when the imaging environment is bright. Therefore, the consumption of power can be further reduced compared to the power consumption reduction effect of the first embodiment. There is an effect of reducing electric power.

  According to the third embodiment, the imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and the brightness of the backlight of the LCD display unit are controlled corresponding to the plurality of frame rates. A backlight luminance value table in which a predetermined luminance level is set in advance for each camera light ON state and OFF state, and a camera corresponding to the imaging frame rate detected by the imaging frame rate detection means when the camera module is activated The brightness level when the light is on or off is detected from the backlight brightness value table, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the detected brightness level, and the imaging frame rate is activated while the camera module is activated. When the detection means detects a change in the imaging frame rate, it changes. An LCD backlight control means for detecting a luminance level corresponding to the imaging frame rate from the backlight luminance value table and causing the backlight of the LCD display unit to emit light by a drive current corresponding to the newly detected luminance level. Thus, the lighting brightness of the backlight of the LCD display unit can be switched according to the ambient brightness in response to the turning on and off of the camera light.

  In addition, even when the imaging environment with a high imaging frame rate is bright, if the camera light is lit, the power consumption of the LCD backlight can be finely controlled by setting the light emission luminance of the LCD backlight low. Compared with the first embodiment, the current consumption can be further reduced.

  Also, the lighting brightness of the LCD backlight can be switched even in an environment where the ambient brightness when the camera light is on cannot be accurately detected.

  According to the fourth embodiment, the imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and the backlight brightness of the LCD display unit are controlled in correspondence with the plurality of frame rates. A predetermined brightness level for controlling the backlight and ON information or OFF information for controlling light emission of the backlight of the key operation unit or stop of the light emission are separately set for the camera light ON state and the OFF state. The brightness value table and the brightness level of the LCD backlight corresponding to the imaging frame rate detected by the imaging frame rate detection means and the ON / OFF information of the operation unit backlight when the camera module is started up from the backlight luminance value table to the camera light Detected corresponding to the ON or OFF state of the brightness level detected The backlight of the LCD display unit emits light according to the corresponding drive current, and the backlight of the key operation unit emits light or stops light emission according to the detected ON or OFF information, and the imaging frame rate detection means captures images while the camera module is activated When a change in the frame rate is detected, the brightness level corresponding to the changed imaging frame rate and ON or OFF information are detected from the backlight brightness value table, and the LCD display unit is driven by the drive current corresponding to the newly detected brightness level. The backlight of the key operation unit is turned on or off by the newly detected ON or OFF information, and the camera light is turned off and turned on. Depending on the ambient brightness, the LCD display It is possible to turn on or off the backlight of the key operating section and at the same time switches the luminance, power consumption of the LCD backlight and the operation unit backlight is capable of further reducing compared to the third embodiment.

  When the imaging environment is bright and the camera light is OFF, unnecessary operation unit backlight emission is stopped, so that power consumption of the operation unit backlight can be reduced.

    Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a main configuration of a camera-equipped cellular phone according to the first embodiment, FIG. 2 is a diagram showing an example of an imaging frame rate of the present invention, and FIG. 3 is a backlight control process according to the first embodiment. FIG. 4 is a diagram showing an example of a backlight luminance value table according to the first embodiment, FIG. 5 is a diagram showing a main configuration of the camera-equipped mobile phone according to the second embodiment, and FIG. FIG. 7 is a diagram illustrating an example of a backlight luminance value table according to the second embodiment, FIG. 7 is a flowchart for explaining backlight control processing according to the second embodiment, and FIG. 8 is a camera-equipped mobile phone according to the third embodiment. FIG. 9 is a diagram illustrating a main configuration of the telephone, FIG. 9 is a flowchart illustrating backlight control processing according to the third embodiment, FIG. 10 is a diagram illustrating an example of a backlight luminance value table according to the third embodiment, and FIG. Is the fourth fruit FIG. 12 is a flowchart for explaining a backlight control process according to the fourth embodiment, and FIG. 13 is an example of a backlight luminance value table according to the fourth embodiment. FIG. 14 is a diagram showing a lighting operation of the camera light unit.

First, the configuration of the first embodiment will be described with reference to FIG.
A cellular phone 10 shown in FIG. 1 includes an antenna 101, a radio unit 102, a camera unit 103, an LCD display unit 104, an LCD backlight unit 105, an operation unit 106, a control unit 107, and an audio processing unit 108. And a receiver 109 and a microphone 110.

The control unit 107 has a control function for controlling the entire mobile phone, and includes a CPU 111, a memory 112, and a timer 113.
The mobile phone 10 communicates with a base station (not shown) via the wireless unit 102 and the antenna 101 under the control of the control unit 107. Radio section 102 selects a signal frequency desired to be received by antenna 101, performs frequency conversion, amplifies, demodulates, and outputs received data to control section 107.

  The control unit 107 processes the received data and outputs an audio signal to the audio processing unit 108. The audio processing unit 108 converts the audio signal into an analog signal and outputs audio from the receiver 109.

  Also, the audio input from the microphone 110 is converted into a digital signal by the audio processing unit 108, and the control unit 107 processes the signal into transmission data, modulates it by the radio unit 102, and modulates it with a prescribed frequency. Amplified as a carrier wave and transmitted from the antenna 101.

  The control unit 107 monitors the operation unit 106, detects and determines a user's key operation, and performs processing based on the key operation. The LCD display unit 104 performs various displays under the control of the control unit 107, and the LCD backlight unit 105 emits light with a drive current corresponding to the set luminance level value under the control of the control unit 107.

  The control unit 107 controls turning on / off of the LCD backlight unit 105 in accordance with display ON / OFF of the LCD display unit 104 and the like.

  The camera unit 103 images the subject under the control of the control unit 107 and outputs image data for one image to the control unit 107 for each imaging frame rate.

  The camera unit 103 switches the imaging frame rate according to the illuminance as shown in FIG. In the dark, since the light receiving time of the image sensor is lengthened to compensate for the lack of illuminance, the imaging frame rate is lowered, and the image data output cycle to the control unit 107 is lengthened.

  The control unit 107 converts the image data output by the camera unit 103 for each imaging frame rate into a display data format and causes the LCD display unit 104 to display the image data. When a camera image storage operation is detected from the operation unit 106, the image data output from the camera unit 103 is stored in the memory 112.

  Next, the backlight control processing will be described with reference to FIG. 3, FIG. 1, FIG. 2, and FIG.

  Normally, when the mobile phone 10 is being operated, the LCD display unit 104 displays information corresponding to the operation (LCD display unit ON state), and the LCD backlight unit 105 is also lit (LCD back-up). Here, a case where the LCD display unit 104 and the LCD backlight unit 105 are in the ON state and the user operates the operation unit 106 and starts the camera unit 103 will be described as an example.

  When the user performs a camera activation operation on the operation unit 106, the control unit 107 activates the camera unit 103 to enter a shooting state (step S301 in FIG. 3).

  The control unit 107 converts the image data for one image output from the camera unit 103 into a display data format for each imaging frame rate, sets the display data in the LCD display unit 104, and sets the display data from the default screen display to the camera unit 103. A viewfinder display for displaying the captured image is made (S302).

  The control unit 107 uses the timer 113 to count and detect the imaging frame rate of the camera unit 103 (S303). The counting of the imaging frame rate can be detected by, for example, counting the synchronization signal of the image data output from the camera unit 103 based on the reference clock in the control unit 107.

  The control unit 107 selects a backlight luminance level corresponding to the detected imaging frame rate, and sets the backlight luminance in the LCD backlight unit 105 (S304). The LCD backlight unit 105 emits light with a driving current corresponding to the backlight luminance value.

  The selection of the backlight luminance is performed by selecting a backlight luminance level corresponding to the imaging frame rate using a backlight luminance value table preset in the memory 112.

  In the backlight luminance value table, as shown in FIG. 4, the luminance level of the LCD backlight is set corresponding to a plurality of imaging frame rates.

  According to FIG. 4, when the imaging frame rate is 15 (frame / sec) or more, the luminance level value of the LCD backlight unit is 4, and when the frame rate is 10 to 14 (frame / sec), the luminance level value. Is 3 and the frame rate is 5 to 9 (frame / sec), the brightness level value is 2, and when the frame rate is 4 (frame / sec) or less, the brightness level value is set to 1.

  The brightness level of the LCD backlight in the backlight brightness value table is set to a high value when the imaging environment is bright (when the imaging frame rate is high), and when the imaging environment is dark (when the imaging frame rate is low). Set a lower brightness level than when bright.

  Therefore, when the imaging environment is dark, there is no reflected light to the LCD display unit 104, so that it is not affected by the brightness of the surroundings, and the brightness value necessary to ensure visibility is bright under sunlight. It can be set to a low value compared to.

  The LCD backlight unit 104 emits light from a drive current corresponding to the set backlight brightness level. If the brightness level value is low, the light emission brightness is low and the current consumed is small.

  The control unit 107 monitors the activation state of the camera unit 103 (activation stop of the camera unit 103) (S305). When the camera unit 103 is activated, the timer 113 counts the imaging frame rate of the camera unit 103. And the detection of the imaging frame rate is continued (S306).

  The control unit 107 compares the imaging frame rate detected in step S306 with the imaging frame rate detected in the previous time (in step S303), and the imaging frame rate detected in step S306 changes with respect to the imaging frame rate detected in step S303. It is determined whether or not (S307).

  If there is a change in the determination in step S307, the control unit 107 proceeds to step S304, selects a backlight luminance level corresponding to the imaging frame rate detected this time from the backlight luminance value table, and the LCD backlight unit 105. To repeat the processing of step S305 to step S307. The LCD backlight unit 105 emits light with a driving current corresponding to the newly set backlight luminance level.

  If there is no change in the imaging frame rate in step S307, the process proceeds to step S305, and the next change in the imaging frame rate is monitored. As a result, it is possible to switch the luminance of the backlight even when the shooting environment (brightness) during activation of the camera changes.

  In step S305, the control unit 107 terminates the camera mode when a user performs a camera termination operation (camera mode stop operation) using the operation unit 106 or when no user operation is performed while the camera is activated and a certain time elapses. When detected, the conversion of the image data from the camera unit 103 to the display data format is finished, the default screen is displayed on the LCD display unit 104, the finder display is stopped (S308), and the camera unit 103 is turned off. Set and stop imaging (S309).

Next, the configuration of the second embodiment will be described with reference to FIG.
The mobile phone shown in FIG. 5 is the same as that of the first embodiment shown in FIG. 1 except that the configuration of the backlight is different.

  In the first embodiment (FIG. 1), only the LCD backlight unit 105 is configured. On the other hand, in the second embodiment (FIG. 5), the LCD backlight unit 105 and the operation unit backlight are used. The unit 114 is configured.

  The control unit 107 separately controls brightness control of the LCD backlight unit 105 and ON / OFF control of light emission of the operation unit backlight unit 114. Since other configurations are the same as those of the first embodiment, description of the configurations is omitted.

  In addition, the backlight luminance value table predetermined in the memory 112 is used to stop the luminance level of the LCD backlight corresponding to the imaging frame rate and the operation unit backlight emission or emission as shown in FIG. ON / OFF information is set. Note that the brightness level of the backlight may be used instead of the light emission ON / OFF information.

  As shown in FIG. 6, the backlight brightness value table is turned off (turned off) when the image is bright (when the imaging frame rate is high) and is dark (when the imaging frame rate is low). The operation unit backlight unit 514 is turned on (lighted).

  Considering the operability of the user, it is not necessary to illuminate the operation unit when it is bright, but the operability is improved by illuminating the operation unit when it is dark.

  The operation in the second embodiment is the same as the operation in the first embodiment. The control unit 107 detects the imaging frame rate and detects the imaging backlight rate table 105 based on the backlight luminance value table. Along with the setting of the luminance level according to the imaging frame rate, the operation unit backlight unit 114 is turned ON / OFF.

  Next, the backlight control process will be described with reference to FIG. 7 together with FIGS. 2, 5, and 6.

  When the user performs a camera activation operation on the operation unit 106, the control unit 107 activates the camera unit 103 to enter a shooting state (step S401 in FIG. 7).

  The control unit 107 converts the image data for one image output from the camera unit 103 into a display data format for each imaging frame rate, sets the display data in the LCD display unit 104, and sets the display data from the default screen display to the camera unit 103. A viewfinder display for displaying the captured image is made (S402).

  The control unit 107 uses the timer 113 to count and detect the imaging frame rate of the camera unit 103 (S403). The counting of the imaging frame rate can be detected by, for example, counting the synchronization signal of the image data output from the camera unit 103 based on the reference clock in the control unit 107.

Control unit 107 selects the brightness level of the LCD backlight corresponding to the detected imaging frame rate from the backlight luminance value table and sets the selected and the brightness level on the LCD backlight unit 105 (S404).

  Subsequently, the control unit 107 searches the backlight luminance value table for ON / OFF information of the operation unit backlight corresponding to the imaging frame rate detected in step S403 (S405), and when the ON information is detected, the operation unit back is detected. Backlight ON (lighted) is set in the light unit 114 (S406), and when OFF information is detected, the backlight OFF (off) is set in the operation unit backlight unit 114 (S407).

  The brightness value level of the LCD backlight and the ON / OFF information of the operation unit backlight are selected based on the backlight brightness value table preset in the memory 112 and the LCD backlight brightness level corresponding to the imaging frame rate and the operation unit. This is done by selecting backlight ON / OFF information.

  In the backlight luminance value table, as shown in FIG. 6, the luminance level of the LCD backlight and the ON / OFF information of the operation unit backlight are set corresponding to a plurality of imaging frame rates.

  According to FIG. 6, when the imaging frame rate is 15 (frame / sec) or more, the brightness level value of the LCD backlight is 4, the ON / OFF information of the operation unit backlight is OFF, and the frame rate is 10 to 14 ( In the case of (frame / sec), the luminance level value is 3, the ON / OFF information of the operation unit backlight is OFF, and when the frame rate is 5 to 9 (frame / sec), the luminance level value is 2, and the operation unit backlight When the light ON / OFF information is ON and the frame rate is 4 (frame / sec) or less, the value of the luminance level is set to 1, and the ON / OFF information of the operation unit backlight is set to ON.

  The backlight luminance value in the backlight luminance value table is set to a high value when the imaging environment is bright (when the imaging frame rate is high), and bright when the imaging environment is dark (when the imaging frame rate is low). The brightness level is set lower than the case.

  The ON / OFF information of the operation unit backlight is set to OFF when the imaging environment is bright (when the imaging frame rate is high), and is set to ON when the imaging environment is dark (when the imaging frame rate is low).

  Therefore, when the imaging environment is dark, there is no reflected light to the LCD display unit 104, so that it is not affected by the brightness of the surroundings. It can be set to a low value compared to the bright case of.

  The LCD backlight unit 104 emits light from a drive current corresponding to the set backlight brightness level. If the brightness level value is low, the light emission brightness is low and the current consumed is small.

  In addition, when the imaging environment is bright, unnecessary lighting of the operation unit backlight can be prevented, so that current consumption can be further suppressed.

  The control unit 107 monitors the activation state of the camera unit 103 (S408). When the camera unit 103 is activated, the timer 113 continues to count the imaging frame rate of the camera unit 103 and detects the imaging frame rate. (S409).

  The control unit 107 compares the imaging frame rate detected in step S409 with the imaging frame rate detected in the previous time (in step S403), and the imaging frame rate detected in step S409 changes with respect to the imaging frame rate detected in step S403. It is determined whether or not (S410).

  If there is a change in the determination in step S410, the control unit 107 proceeds to step S404, selects a backlight luminance level corresponding to the imaging frame rate detected this time in step S404 from the backlight luminance value table, and displays the LCD backlight. After setting the light unit 105 to emit light, the processing in steps S405 to S410 is executed.

  If there is no change in the imaging frame rate in step S410, the process proceeds to step S408, and the next change in the imaging frame rate is monitored. As a result, it is possible to switch the luminance of the backlight even when the shooting environment (brightness) during activation of the camera changes.

  In step S408, the control unit 107 terminates the camera mode when a user performs a camera termination operation (camera mode stop operation) using the operation unit 106, or when no user operation is performed while the camera is activated and a certain time elapses. When detected, the conversion of the image data from the camera unit 103 into the display data format is finished, the default screen is displayed on the LCD display unit 104, the finder display is stopped (S411), and the camera unit 103 is turned off. Set and stop imaging (S412).

  As a result, when the camera unit is bright when the camera unit is activated, unnecessary illumination of the operation unit backlight can be turned off (extinguish), so that further reduction of current consumption can be achieved as compared with the first embodiment. An effect occurs.

Next, the configuration of the third embodiment will be described with reference to FIG.
The mobile phone 10 shown in FIG. 8 has the same configuration as that of the first embodiment shown in FIG. 1 except that the camera light unit 115 and the backlight luminance value table of the memory 112 are different.

  The control unit 107 sets different luminance levels for the LCD backlight unit 105 when the camera light unit 115 is in the ON state and when it is in the OFF state. Since other configurations are the same as those of the first embodiment, description of the configurations is omitted.

  In the backlight luminance value table, as shown in FIG. 10, the luminance level of the LCD backlight corresponding to each imaging frame rate is registered corresponding to the ON state and the OFF state of the camera light 115.

  According to FIG. 10, when the camera light 115 is ON, the brightness level for setting the LCD backlight unit 105 when the imaging environment is bright (when the imaging frame rate is high) is when the camera light 115 is OFF. Compared to, a lower level is registered.

  The control unit 107 has a control function for controlling the entire mobile phone, and includes a CPU 111, a memory 112, and a timer 113.

  The control unit 107 monitors the operation unit 106, detects and determines a user's key operation, and performs processing based on the key operation. The LCD display unit 104 performs various displays under the control of the control unit 107, and the LCD backlight unit 105 emits light with a drive current corresponding to the set luminance level value under the control of the control unit 107.

  The control unit 107 controls turning on / off of the LCD backlight unit 105 in accordance with the display state (ON / OFF or the like) of the LCD display unit 104.

The control unit 107 detects a user operation and controls turning on / off of the camera light unit 115. Further, the camera light unit 115 performs weak lighting and strong lighting with different luminances under the control of the control unit 107. Weak lighting is used to illuminate the surroundings, and strong lighting is used for the camera flash.
As shown in FIG. 14A, the camera light unit 115 turns on the camera light (lights on the weak spot) after the camera is activated by the user operation, and turns on the flash (strongly lights) when the shutter is pressed. As shown in B), the flash may be turned on (strongly lit) when the shutter is pressed.

  The camera unit 103 images the subject under the control of the control unit 107 and outputs image data for one image to the control unit 107 for each imaging frame rate.

  The camera unit 103 switches the imaging frame rate according to the illuminance as shown in FIG. In the dark, the light receiving time of the image sensor is lengthened to compensate for the lack of illuminance, so that the imaging frame rate is lowered and the image data output cycle to the control unit 107 is lengthened.

  The control unit 107 converts the image data output by the camera unit 103 for each imaging frame rate into a display data format and causes the LCD display unit 104 to display the image data. When a camera image storage operation is detected from the operation unit 106, the image data output from the camera unit 103 is stored in the memory 112.

  The operation in the third embodiment is similar to the operation in the first embodiment, in which the control unit 107 detects the imaging frame rate, and the operation state (ON / OFF) of the camera light unit 115 corresponding to the detected imaging frame rate. ) Is detected from the backlight luminance value table and set in the LCD backlight unit 105.

  Next, the backlight control process will be described with reference to FIGS.

  Normally, when the mobile phone 10 is being operated, the LCD display unit 104 displays information corresponding to the operation (LCD display unit ON state), and the LCD backlight unit 105 is also lit (LCD back-up). Here, a case where the LCD display unit 104 and the LCD backlight unit 105 are in the ON state and the user operates the operation unit 106 and starts the camera unit 103 will be described as an example.

  When the user performs a camera activation operation on the operation unit 106, the control unit 107 activates the camera unit 103 to enter a shooting state (step S501 in FIG. 9).

  The control unit 107 converts the image data for one image output from the camera unit 103 into a display data format for each imaging frame rate, sets the display data in the LCD display unit 104, and sets the display data from the default screen display to the camera unit 103. A viewfinder display for displaying the captured image is made (S502).

  The control unit 107 counts and detects the imaging frame rate of the camera unit 103 by the timer 113 (S503). The counting of the imaging frame rate can be detected by, for example, counting the synchronization signal of the image data output from the camera unit 103 based on the reference clock in the control unit 107.

The control unit 107 determines whether or not the camera light unit 115 is turned on (S503). If the determination result is turned off, the backlight luminance in the camera light OFF state corresponding to the imaging frame rate detected in step S503 is determined. The level is selected from the backlight luminance value table, and the backlight luminance level is set in the LCD backlight unit 105.
The LCD backlight unit 105 emits light with a driving current corresponding to the set backlight luminance level when the camera light is turned off.

When the determination result of the camera light in step S504 is on, the control unit 107 selects a backlight luminance level in the camera light ON state corresponding to the imaging frame rate detected in step S503 from the backlight luminance value table. The backlight brightness level is set in the LCD backlight unit 105.
The LCD backlight unit 105 emits light with a driving current corresponding to the set backlight luminance level when the camera light is turned on.

  The selection of the backlight luminance value is performed by selecting a backlight luminance level corresponding to the imaging frame rate using a backlight luminance value table preset in the memory 112.

  As shown in FIG. 10, in the backlight luminance value table, the luminance level of the LCD backlight when the camera light is in the ON state and the OFF state is set corresponding to a plurality of imaging frame rates.

  According to FIG. 10, when the imaging frame rate is 15 (frame / sec) or more, the value of the luminance level of the LCD backlight unit when the camera light is off is 4, and the LCD backlight unit when the camera light is on. When the brightness level value is 2, the frame rate is 10 to 14 (frame / sec), the brightness level value when the camera light is off is 3, the brightness level value when the camera light is on is 2, When the frame rate is 5 to 9 (frame / sec), the brightness level value is 2 when the camera light is off, the brightness level value is 2 when the camera light is on, and the frame rate is 4 (frame / sec). In the following cases, the value of the brightness level when the camera light is off is set to 1, and the value of the brightness level when the camera light is on is set to 1.

  The backlight luminance value in the backlight luminance value table is set to a high value when the imaging environment is bright (when the imaging frame rate is high), and bright when the imaging environment is dark (when the imaging frame rate is low). The brightness level is set lower than the case, but when the camera light unit 115 is turned on, the camera light unit 115 is turned off even when the imaging frame rate is high. A lower luminance level is set in advance.

  Therefore, when the camera light 115 is turned off and the imaging environment is dark, there is no reflected light to the LCD display unit 104, so that the brightness level necessary for ensuring visibility is not affected by ambient brightness. It can be set to a lower value than when the imaging environment is bright, such as under sunlight.

  Further, when the camera light 115 is lit, it can be assumed that the imaging environment is dark, so the LCD backlight is illuminated.

  The LCD backlight unit 104 emits light from a drive current corresponding to the set backlight brightness level. If the brightness level value is low, the light emission brightness is low and the current consumed is small.

  The control unit 107 monitors the activation state of the camera unit 103 and determines whether or not the camera unit 103 is in a stopped state (camera mode stopped) (S506). If the camera unit 103 is in the stopped state, the process proceeds to step S511. The timer 113 continues to count the imaging frame rate of the camera unit 103 and continues to detect the imaging frame rate (S507).

  The control unit 107 compares the imaging frame rate detected in step S507 with the imaging frame rate detected in the previous time (in step S504), and the imaging frame rate detected in step S507 changes with respect to the imaging frame rate detected in step S503. It is determined whether or not (S508).

  If there is a change in the determination in step S508, the control unit 107 proceeds to step S504 and determines again whether or not the camera light 115 is turned on (S504).

  When the determination result of the camera light in step S504 is in the off state, the backlight luminance level value when the camera light corresponding to the imaging frame rate detected this time in step S507 is in the OFF state is the backlight luminance in FIG. A value is selected from the value table and set in the LCD backlight unit 105 (S505). The LCD backlight unit 105 emits light with a driving current corresponding to the newly set backlight luminance level.

  If the determination result of the camera light in step S504 is in the lit state, the backlight luminance level value in the camera light ON state corresponding to the frame rate detected this time in step S507 is the backlight luminance value table shown in FIG. And set in the LCD backlight unit 105 (S509). The LCD backlight unit 105 emits light with a driving current corresponding to the newly set backlight luminance level. Thereafter, the processing from step S506 to step S508 is executed.

  If there is no change in the imaging frame rate in step S508, the process proceeds to step S506, and the next change in the imaging frame rate is monitored. This makes it possible to switch the luminance of the backlight even when the shooting environment (brightness, camera light on / off) when the camera is activated changes.

  In step S506, the control unit 107 terminates the camera mode when a user performs a camera termination operation (camera mode stop operation) using the operation unit 106 or when no user operation is performed during camera activation and a certain time elapses. When detected, the conversion of the image data from the camera unit 103 to the display data format is finished, the default screen is displayed on the LCD display unit 104, the finder display is stopped (S510), and the camera unit 103 is turned off. Set and stop imaging (S511).

  As described above, when the LCD backlight is controlled with different brightness corresponding to the imaging frame rate, the brightness level is set in consideration of the operation state (lighted and turned off) of the camera light unit 115 operated by the user as necessary. Therefore, LCD backlight control suitable for the imaging environment is possible.

  Further, when the camera light is turned on, the LCD backlight is illuminated with a predetermined luminance in consideration of the dark imaging environment, so that the user operability is improved.

Next, the configuration of the fourth embodiment will be described with reference to FIG.
The mobile phone 10 shown in FIG. 11 has the same configuration as that of the third embodiment shown in FIG. 8 except that the configuration of the backlight and the backlight luminance value table of the memory 112 are different.

  In the third embodiment (FIG. 8), the backlight is configured only by the LCD backlight unit 105, whereas in the fourth embodiment (FIG. 11), the LCD backlight unit 105 and the operation unit are configured. The backlight unit 114 is configured.

  The control unit 107 controls the brightness control of the LCD backlight unit 105 and the ON / OFF control of the light emission of the operation unit backlight unit 114 for each state (ON / OFF) of the camera light unit 115. Since the other configuration is the same as that of the third embodiment, description of the configuration is omitted.

  As shown in FIG. 13, the backlight luminance value table previously set in the memory 112 has an LCD backlight luminance level corresponding to a plurality of imaging frame rates, and an operation unit backlight ON / OFF (lighting / extinguishing). ) Is set for each camera light state (ON / OFF). The ON / OFF setting of the operation unit backlight may be the luminance level of the operation unit backlight).

  According to FIG. 13, when the camera light is OFF, when the imaging frame rate is 15 (frames / sec) or more, the brightness level value of the LCD backlight is 4, and the ON / OFF information of the operation unit backlight is OFF, when the frame rate is 10-14 (frame / sec), the luminance level value is 3, ON / OFF information of the operation unit backlight is OFF, and when the frame rate is 5-9 (frame / sec), the luminance When the level value is 2, the operation unit backlight ON / OFF information is ON, and the frame rate is 4 (frame / sec) or less, the luminance level value is 1, and the operation unit backlight ON / OFF information is ON. Is set.

  When the camera light is ON, when the imaging frame rate is 15 (frame / sec) or higher, the brightness level value of the LCD backlight is 2, the ON / OFF information of the operation unit backlight is ON, and the frame rate. Is 10-14 (frames / sec), the brightness level value is 2, the operation unit backlight ON / OFF information is ON, and when the frame rate is 5-9 (frames / sec), the brightness level value is 2. When the operation unit backlight ON / OFF information is ON and the frame rate is 4 (frame / sec) or less, the luminance level value is set to 1, and the operation unit backlight ON / OFF information is set to ON. .

  The brightness level of the LCD backlight is set high when the camera light unit 115 is off and the imaging environment is bright (when the imaging frame rate is high), and when the imaging environment is dark (the imaging frame rate is low). When the camera light unit 115 is in a lit state, the camera light is turned off even if the imaging frame rate is high and bright. The brightness level is set lower than in the case where

  The operation unit backlight ON / OFF setting is set to OFF when the camera light is OFF and the imaging environment is bright (when the imaging frame rate is high). When the environment is dark (when the imaging frame rate is low), it is set to ON in consideration of user operability. When the camera light is on, it is assumed that the imaging environment is dark, and the operation unit backlight unit 114 is set to be illuminated regardless of the imaging frame rate.

  The operation in the fourth embodiment is similar to the operation in the third embodiment. The control unit 107 detects the imaging frame rate, and detects the imaging frame rate detected based on the backlight luminance value table shown in FIG. In accordance with the setting of the brightness level corresponding to the LCD backlight unit 105, the operation unit backlight unit 114 is turned ON / OFF.

  When the camera light 115 is OFF, the operation unit backlight 114 is caused to emit light only when the imaging environment is dark (the imaging frame rate is low), and when the camera light 115 is ON, regardless of the detected imaging frame rate. The operation unit backlight unit 114 is caused to emit light.

  Such a setting for the operation unit backlight does not require illumination of the operation unit when the imaging environment is bright, but the user operability is improved by illumination of the operation unit when the imaging environment is dark.

  In addition, when the imaging environment is dark and the camera light needs to be turned on, the operability is improved by illuminating the operation unit in consideration of the dark surroundings.

  Next, the backlight control process will be described with reference to FIGS. 11 and 13 together with FIG.

  When the user performs camera activation (camera mode setting) operation on the operation unit 106, the control unit 107 activates the camera unit 103 to enter a shooting state (step S601 in FIG. 12).

  The control unit 107 converts the image data for one image output from the camera unit 103 into a display data format for each imaging frame rate, sets the display data in the LCD display unit 104, and sets the display data from the default screen display to the camera unit 103. A viewfinder display for displaying the captured image is made (S602).

  The control unit 107 counts and detects the imaging frame rate of the camera unit 103 by the timer 113 (S603). The counting of the imaging frame rate can be detected by, for example, counting the synchronization signal of the image data output from the camera unit 103 based on the reference clock in the control unit 107.

  The control unit 107 determines whether or not the camera light unit 115 is turned on (S604). If the determination result is turned off, the backlight in the camera light OFF state corresponding to the imaging frame rate detected in step S603 is displayed. The luminance level is selected from the backlight luminance value table, and the backlight luminance level is set in the LCD backlight unit 105 (S605).

  Thereby, the LCD backlight unit 105 emits light with a driving current corresponding to the set backlight luminance level when the camera light is turned off.

  After setting the luminance for the LCD backlight 105 in step S605, the control unit 107 determines from the backlight luminance value table shown in FIG. 13 that the operation unit backlight when the camera light 115 corresponding to the imaging frame rate detected in step S603 is OFF. The ON / OFF setting is searched (S606). When the ON setting is detected, the backlight ON (lit) is set in the operation unit backlight unit 114 (S607), and when the OFF setting is detected, the operation unit backlight unit 114 is set. The backlight is turned off (turned off) (S608).

  When the determination result of the camera light in step S604 is on, the control unit 107 selects from the backlight luminance value table the backlight luminance level when the camera light is on corresponding to the imaging frame rate detected in step S603. Then, the backlight luminance level is set in the LCD backlight unit 105 (S612).

  Thereby, the LCD backlight unit 105 emits light with a driving current corresponding to the set backlight luminance level when the camera light is turned on.

  After setting the luminance for the LCD backlight 105 in step S612, the control unit 107 detects the operation unit backlight when the camera light 115 corresponding to the imaging frame rate detected in step S603 is ON from the backlight luminance value table shown in FIG. ON / OFF setting is searched (S613). When ON setting is detected, backlight ON (lighting) is set in the operation unit backlight unit 114 (S614). When OFF setting is detected, operation unit backlight unit 114 is set. The backlight is turned off (turned off) (S615).

  The control unit 107 sets ON (lights) for the operation unit backlight 114 in step S607, sets OFF (extinguishes) for the operation unit backlight 114 in step S608, or sets ON (lights) for the operation unit backlight 114 in step S614. After the setting of the operation unit backlight 114 to OFF (extinguishment) in step S615, the operation state monitoring of the camera unit 103 is continued to detect whether or not the camera mode is finished (S609).

  When the detection result in step S609 is continuing the camera mode, the count by the timer 113 is continued and the detection of the imaging frame rate of the camera unit 103 is continued (S610).

  The control unit 107 compares the imaging frame rate detected in step S610 with the imaging frame rate detected in the previous step S603, and the imaging frame rate detected in step S610 changes with respect to the imaging frame rate detected in step S603. It is determined whether or not there is (S611).

  In step S611, if there is no change in the imaging frame rate, the process proceeds to step S609. If there is a change in the imaging frame rate, the process proceeds to step S604, and it is determined whether the camera light unit 115 is turned on again. (S604).

  When the determination result of the camera light in step S604 is OFF, the brightness level of the LCD backlight when the camera light is OFF corresponding to the imaging frame rate newly detected in step S610 is selected from the backlight brightness value table. The LCD backlight unit 105 is set (S605). The LCD backlight unit 105 emits light with a driving current corresponding to the newly set backlight luminance level. Thereafter, the control unit 107 executes the processes of steps S606 to S611.

  When the determination result of the camera light in step S604 is on, the control unit 107 displays the luminance level of the LCD backlight when the camera light corresponding to the imaging frame rate newly detected in step S610 is ON. And set in the LCD backlight unit 114 (S612). Accordingly, the LCD backlight unit 114 emits light with a driving current corresponding to the newly set backlight luminance level. Thereafter, the processing from step S613 to step S11 is executed.

  When the change in the frame rate is not detected in the comparison between the imaging frame rate detected in step S603 and the imaging frame rate detected in step S610 in step S611, the control unit 107 proceeds to step S609, and from step S609 to step S609. The process of S611 is executed.

  In step S609, the control unit 107 terminates the camera mode when a user performs a camera end operation (camera mode stop operation) using the operation unit 106 or when there is no user operation during camera activation and a certain time elapses. When detected, the conversion of the image data from the camera unit 103 into the display data format is finished, the default screen is displayed on the LCD display unit 104, the finder display is stopped (S615), and the camera unit 103 is turned off. Set and stop imaging (S616).

  The selection of the LCD backlight luminance level and the operation unit backlight ON / OFF information is performed using the backlight luminance value table (FIG. 13) preset in the memory 112 and the LCD backlight luminance level and operation corresponding to the imaging frame rate. This is done by selecting the part backlight ON / OFF information.

  When the camera light 115 is off and the imaging environment is dark, there is no reflected light to the LCD display unit 104, so that the brightness value necessary for ensuring visibility is not affected by the surrounding brightness. It can be set to a lower value than in a bright case such as under light.

  Therefore, the LCD backlight unit 104 emits light from the drive current corresponding to the set backlight brightness level. If the brightness level value is low, the light emission brightness is low and the current consumed is small. In addition, when the imaging environment is bright, unnecessary lighting of the operation unit backlight can be prevented, so that current consumption can be further suppressed.

  Further, since the operation unit backlight 114 emits light only when the imaging environment is dark when the camera light 115 is turned off, power consumption by the operation unit backlight 114 when the imaging environment is bright is reduced.

  Further, when the camera light is on, the operation unit backlight 115 emits light regardless of the imaging frame rate assuming that the imaging environment is dark, so that the operability for the user is improved.

  In this way, the change in the next imaging frame rate is monitored, and when the change in the imaging frame rate is detected, the brightness level of the LCD backlight unit corresponding to the newly detected frame rate and the lighting / Since the turn-off is controlled, the backlight luminance can be switched even when the shooting environment (brightness, camera light on / off) when the camera is activated changes.

  This makes it possible to turn off the unnecessary operation unit backlight when the camera unit is bright when the camera unit is started up, so that an effect of further reducing current consumption occurs compared to the third embodiment. To do.

  By monitoring the change in the imaging frame rate, the luminance of the backlight can be switched even when the shooting environment (brightness, camera light on / off) when the camera is activated changes.

It is a figure which shows the main structures of the mobile telephone with a camera of the 1st Embodiment of this invention. It is a figure which shows an example of the imaging frame rate of this invention of this invention. It is a flowchart explaining the backlight control processing of the 1st Embodiment of this invention. It is a figure which shows an example of the backlight luminance value table of the 1st Embodiment of this invention. It is a figure which shows the main structures of the mobile telephone with a camera of the 2nd Embodiment of this invention. It is a figure which shows an example of the backlight luminance value table of the 2nd Embodiment of this invention. It is a flowchart explaining the backlight control processing of the 2nd Embodiment of this invention. It is a figure which shows the main structures of the mobile telephone with a camera of the 3rd Embodiment of this invention. It is a flowchart explaining the backlight control processing of the 3rd Embodiment of this invention. It is a figure which shows an example of the backlight luminance value table of the 3rd Embodiment of this invention. It is a figure which shows the main structures of the mobile telephone with a camera of the 4th Embodiment of this invention. It is a flowchart explaining the backlight control processing of the 4th Embodiment of this invention. It is a figure which shows an example of the backlight luminance value table of the 4th Embodiment of this invention. It is a figure which shows the lighting operation of the camera light part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mobile phone 101 Antenna 102 Radio | wireless part 103 Camera part 104 LCD display part 105 LCD backlight part 106 Operation part 107 Control part 108 Audio | voice processing part 109 Receiver 110 Microphone 111 CPU
112 memory 113 timer 114 operation unit backlight unit 115 camera light unit

Claims (25)

In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module A camera-equipped cellular phone comprising: an imaging frame rate detecting means for detecting the backlight; and a backlight control means for controlling the luminance of the backlight in accordance with the imaging frame rate detected by the imaging frame rate detecting means. Backlight control method. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module A camera having an imaging frame rate detecting means for detecting the image and an LCD backlight control means for controlling the luminance of the backlight of the LCD display unit in accordance with the imaging frame rate detected by the imaging frame rate detecting means. Backlight control method for mobile phones In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module Imaging frame rate detection means for detecting the image, LCD backlight control means for controlling the luminance of the backlight of the LCD display unit according to the imaging frame rate detected by the imaging frame rate detection means, and the backlight of the operation unit A backlight control method for a camera-equipped mobile phone, comprising: an operation unit backlight control unit configured to control light emission or stop of light emission. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module An imaging frame rate detection means for detecting the backlight, a backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates, and the imaging LCD backlight control means for detecting the brightness level corresponding to the imaging frame rate detected by the frame rate detection means from the backlight brightness value table and controlling the backlight of the LCD display section, Backlight for mobile phone with camera Your system. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module An imaging frame rate detecting means for detecting the backlight, a backlight luminance value table for presetting a predetermined luminance level for controlling the luminance of the backlight of the LCD display unit corresponding to a plurality of frame rates, When the camera module is activated, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means is detected from the backlight luminance value table, and the LCD display is based on the drive current corresponding to the detected luminance level. The backlight of the When the imaging frame rate detection means detects a change in the imaging frame rate while the module is activated, the luminance level corresponding to the changed imaging frame rate is detected from the backlight luminance value table, and this newly detected A backlight control method for a camera-equipped mobile phone, comprising: an LCD backlight control unit that causes the backlight of the LCD display unit to emit light by a driving current corresponding to the luminance level. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module Imaging frame rate detection means for detecting the brightness of the backlight of the LCD display unit corresponding to a plurality of frame rates and light emission of the key operation unit backlight or stop of light emission A backlight luminance value table in which ON or OFF information for control is set in advance, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means, and the ON or OFF information are stored in the backlight. Detected from the light brightness value table and detected LCD backlight control means for controlling the backlight of the LCD display unit according to the brightness level, and operation unit backlight control for controlling light emission of the key operation unit backlight or stop of light emission based on the detected ON or OFF information. A backlight control method for a camera-equipped mobile phone. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, the imaging frame rate of the image data output by the camera module Imaging frame rate detection means for detecting the brightness of the backlight of the LCD display unit corresponding to a plurality of frame rates and light emission of the key operation unit backlight or stop of light emission A backlight luminance value table in which ON or OFF information for control is set in advance, the luminance level corresponding to the imaging frame rate detected by the imaging frame rate detection means when the camera module is activated, and the ON Or OFF information on the backlight brightness value table The backlight of the LCD display unit is caused to emit light by a drive current corresponding to the detected luminance level, and the backlight of the key operation unit is caused to emit light or stop light according to the detected ON or OFF information, When the imaging frame rate detection unit detects a change in the imaging frame rate while the camera module is activated, the backlight luminance value table indicates the luminance level and the ON or OFF information corresponding to the changed imaging frame rate. The backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level, and the backlight of the key operation unit is caused to emit light based on the newly detected ON or OFF information. Backlight control means for stopping light emission; The backlight control method for a camera-equipped mobile phone, characterized by. The backlight brightness level set in advance in the backlight brightness value table is set lower when the imaging environment is dark and the imaging frame rate is low than when the imaging environment is bright and the imaging frame rate is high. 8. The backlight control method for a camera-equipped mobile phone according to claim 4 or 7. The backlight ON or OFF information set in advance together with the backlight luminance level of the backlight luminance value table is set as backlight OFF information when the imaging environment is bright and the imaging frame rate is high, and the imaging 8. A backlight control method for a camera-equipped mobile phone according to claim 6, wherein backlight ON information is set when the environment is dark and the imaging frame rate is low. 8. The backlight control method for a camera-equipped mobile phone according to claim 4, wherein the brightness value level and ON / OFF information set in advance in the backlight brightness value table can be arbitrarily set by a user. . In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a backlight of an LCD display unit corresponding to a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the camera module is set in advance, and when the camera module is activated and the LCD display unit is in a finder display state, the imaging frame of the camera module A first step of detecting a rate; and a second step of searching the backlight luminance value table and detecting a predetermined luminance level corresponding to the imaging frame rate of the camera module detected in the first step. And the luminance level detected in the second step is the LC A third step of notifying the backlight unit of the display unit and instructing light emission by a driving current corresponding to the luminance level; and a fourth step of monitoring the stop of activation of the camera module by the user's key operation or a predetermined time A fifth step of detecting a change in the imaging frame rate by continuing detection of the imaging frame rate of the camera module when detecting that the camera module is being activated in a fourth step; When the change in the imaging frame rate is detected in the step, the process proceeds to the second step, the brightness level corresponding to the changed frame rate is detected from the backlight brightness value table, and the newly detected brightness level is supported. After the backlight of the LCD display unit is caused to emit light by the driving current, the fourth step to the fifth step are performed. Step 5 is executed, and when the change in the frame rate is not detected in the fifth step, the process proceeds to the fourth step. In the fourth step, the camera module is activated by the user's key operation or the elapse of a predetermined time. A mobile phone with a camera, comprising: a sixth step of stopping the finder display of the LCD display unit and switching to a predetermined default display when the stop of the camera module is detected. Backlight control method. In a mobile phone equipped with a camera module that outputs image data by switching the imaging frame rate, which is the image capture period according to the imaging environment, and a backlight brightness adjustment function, the LCD display unit can be used for multiple frame rates. A backlight luminance value table that presets a predetermined luminance level for controlling the luminance of the light and ON or OFF information for controlling light emission of the backlight of the key operation unit or stop of the light emission, When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module and a detection by detecting the backlight luminance value table in the first step A predetermined amount corresponding to the imaging frame rate of the camera module A second step of detecting a luminance level; and a third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level. A fourth step of searching the backlight luminance value table and detecting backlight ON / OFF information of the key operation unit corresponding to the imaging frame rate of the camera module detected in the first step; When the ON information is detected in the fourth step, the detected ON information is notified to the backlight unit of the key operation unit and the backlight is instructed to emit light, and the key is used in the fourth step. When the backlight OFF information of the operation unit is detected, the detected OFF information is notified to the backlight unit of the key operation unit. A sixth step for instructing the stop of light emission, a seventh step for monitoring a stop of activation of the camera module by a user's key operation or elapse of a predetermined time, and the camera module being activated in the seventh step When the detection of the imaging frame rate is detected in the eighth step, and when the change of the imaging frame rate is detected in the eighth step, the detection of the imaging frame rate of the camera module is continued. , The luminance level corresponding to the changed imaging frame rate is detected from the backlight luminance value table in the step of brother 2, and the driving corresponding to the newly detected luminance level is detected in the third step. After the backlight of the LCD display unit is caused to emit light by current, the processing from the fourth step to the eighth step When the change in the frame rate is not detected in the eighth step, the process proceeds to the seventh step. In the seventh step, the start of the camera module is stopped by the user's key operation or the elapse of a predetermined time. And an eighth step of stopping the finder display on the LCD display unit, switching to a predetermined default display, and stopping the activation of the camera module when detected. Control method. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a backlight of an LCD display unit corresponding to a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the camera module is set in advance, and when the camera module is activated and the LCD display unit is in a finder display state, the imaging frame of the camera module A first step of detecting a rate; and a second step of searching the backlight luminance value table and detecting a predetermined luminance level corresponding to the imaging frame rate of the camera module detected in the first step. And the luminance level detected in the second step is the LC A third step of notifying the backlight unit of the display unit and instructing light emission by a driving current corresponding to the luminance level; and a fourth step of monitoring the stop of activation of the camera module by the user's key operation or a predetermined time A fifth step of detecting a change in the imaging frame rate by continuing detection of the imaging frame rate of the camera module when detecting that the camera module is being activated in a fourth step; When the change in the imaging frame rate is detected in the step, the process proceeds to the second step, the brightness level corresponding to the changed frame rate is detected from the backlight brightness value table, and the newly detected brightness level is supported. After the backlight of the LCD display unit is caused to emit light by the driving current, the fourth step to the fifth step are performed. Step 5 is executed, and when the change in the frame rate is not detected in the fifth step, the process proceeds to the fourth step. In the fourth step, the camera module is activated by the user's key operation or the elapse of a predetermined time. When the stop of the camera is detected, the finder display of the LCD display unit is stopped, the display is switched to a predetermined default display, and the sixth step of stopping the activation of the camera module is executed by the CPU. program. In a mobile phone equipped with a camera module that outputs image data by switching the imaging frame rate, which is the image capture period according to the imaging environment, and a backlight brightness adjustment function, the LCD display unit can be used for multiple frame rates. A backlight luminance value table that presets a predetermined luminance level for controlling the luminance of the light and ON or OFF information for controlling light emission of the backlight of the key operation unit or stop of the light emission, When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module and a detection by detecting the backlight luminance value table in the first step A predetermined amount corresponding to the imaging frame rate of the camera module A second step of detecting a luminance level; and a third step of notifying the backlight unit of the LCD display unit of the luminance level detected in the second step and instructing light emission by a driving current corresponding to the luminance level. A fourth step of searching the backlight luminance value table and detecting backlight ON / OFF information of the key operation unit corresponding to the imaging frame rate of the camera module detected in the first step; When the ON information is detected in the fourth step, the detected ON information is notified to the backlight unit of the key operation unit and the backlight is instructed to emit light, and the key is used in the fourth step. When the backlight OFF information of the operation unit is detected, the detected OFF information is notified to the backlight unit of the key operation unit. A sixth step for instructing the stop of light emission, a seventh step for monitoring a stop of activation of the camera module by a user's key operation or elapse of a predetermined time, and the camera module being activated in the seventh step When the detection of the imaging frame rate is detected in the eighth step, and when the change of the imaging frame rate is detected in the eighth step, the detection of the imaging frame rate of the camera module is continued. , The luminance level corresponding to the changed imaging frame rate is detected from the backlight luminance value table in the step of brother 2, and the driving corresponding to the newly detected luminance level is detected in the third step. After the backlight of the LCD display unit is caused to emit light by current, the processing from the fourth step to the eighth step When the change in the frame rate is not detected in the eighth step, the process proceeds to the seventh step. In the seventh step, the start of the camera module is stopped by the user's key operation or the elapse of a predetermined time. A backlight control program for a camera-equipped cellular phone that, when detected, causes the CPU to execute an eighth step of stopping the finder display on the LCD display unit, switching to a predetermined default display, and stopping activation of the camera module. In a mobile phone equipped with a camera module that outputs image data by switching an imaging frame rate that is an image capture period according to an imaging environment and a backlight luminance adjustment function, the user turns on as needed while the camera module is activated , A camera light to be turned off, an imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and a backlight brightness of the LCD display unit corresponding to a plurality of frame rates A predetermined luminance level for the backlight is set in advance corresponding to ON / OFF of the camera light, and ON / OFF of the camera light is detected, and the imaging frame rate detecting means detects ON of the camera light corresponding to the imaging frame rate Or an LCD backlight control means for detecting the brightness level corresponding to OFF from the backlight brightness value table and controlling the brightness of the backlight of the LCD display section, Backlight control method. In a mobile phone equipped with a camera module that outputs image data by switching an imaging frame rate that is an image capture period according to an imaging environment and a backlight luminance adjustment function, the user turns on as needed while the camera module is activated , A camera light to be turned off, an imaging frame rate detection means for detecting the imaging frame rate of the image data output from the camera module, and a backlight brightness of the LCD display unit corresponding to a plurality of frame rates A backlight luminance value table in which a predetermined luminance level is set in advance corresponding to ON / OFF of the camera light, and ON / OFF of the camera light is detected when the camera module is activated, and the imaging The imaging frame rate detected by the frame rate detection means The brightness level corresponding to ON or OFF of the corresponding camera light is detected from the backlight brightness value table, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the detected brightness level, and the camera When the imaging frame rate detection means detects a change in the imaging frame rate while the module is activated, the backlight luminance value is set to the luminance level according to ON or OFF of the camera light corresponding to the changed imaging frame rate. A backlight for a camera-equipped cellular phone, comprising: an LCD backlight control unit that detects the backlight of the LCD display unit with a drive current corresponding to the newly detected brightness level. control method. In a mobile phone equipped with a camera module that outputs image data by switching an imaging frame rate that is an image capture period according to an imaging environment and a backlight luminance adjustment function, the user turns on as needed while the camera module is activated A camera light to be turned off, an imaging frame rate detecting means for detecting the imaging frame rate of the image data output by the camera module when the camera module is activated, and an LCD display unit corresponding to the plurality of frame rates A predetermined brightness level for controlling the brightness of the backlight and ON / OFF information for controlling the light emission of the backlight of the key operation unit or the stop of the light emission correspond to ON / OFF of the camera light in advance. The backlight brightness value table to be set and the camera ON / OFF of the light is detected, and the brightness level according to the ON / OFF of the camera light corresponding to the imaging frame rate detected by the imaging frame rate detection means and the backlight of the key operation unit ON / OFF LCD backlight control means for detecting information from the backlight luminance value table and controlling the backlight of the LCD display unit according to the detected luminance level, and the backlight of the key operation unit according to the detected ON or OFF information A backlight control system for a camera-equipped mobile phone, comprising: an operation unit backlight control unit configured to control light emission or light emission stop. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capture period according to an imaging environment and a backlight luminance adjustment function, the user turns on as needed while the camera module is activated, The camera light to be turned off, the imaging frame rate detecting means for detecting the imaging frame rate of the image data output from the camera module, and the backlight brightness of the LCD display unit are controlled in correspondence with a plurality of frame rates. A predetermined luminance level and ON / OFF information for controlling light emission of the backlight of the key operation unit or stop of light emission in advance corresponding to ON or OFF of the camera light. Table and the camera light when the camera module is activated The brightness level of the LCD backlight and the ON / OFF information of the operation unit backlight according to the ON / OFF of the camera light corresponding to the imaging frame rate detected by the imaging frame rate detection means by detecting ON / OFF Is detected from the backlight luminance value table, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the detected luminance level, and the backlight of the key operation unit is turned on by the detected ON or OFF information. When the imaging frame rate detection means detects a change in the imaging frame rate while the camera module is activated, depending on ON or OFF of the camera light corresponding to the changed imaging frame rate The LCD display backlight The luminance level and the ON / OFF information of the key operation unit are detected from the backlight luminance value table, and the luminance of the backlight of the LCD display unit is controlled according to the newly detected luminance level and newly detected. Backlight control method for a camera-equipped mobile phone, comprising: backlight control means for emitting or stopping the backlight of the key operation unit according to the ON or OFF information. The brightness level of the backlight of the LCD display unit set in advance in the backlight brightness value table corresponds to ON / OFF of the camera light, and the imaging environment when the camera light is OFF is dark and the imaging frame The brightness level of the backlight when the rate is low is set lower than the brightness level of the backlight when the imaging environment is bright and the imaging frame rate is high, and the imaging environment is bright when the camera light is on. The luminance level of the backlight when the imaging frame rate is high is set lower than the luminance level of the backlight when the imaging environment is bright when the backlight is OFF and the imaging frame rate is high. The mobile phone with a camera according to claim 15 to 18. Backlight control system of the machine. The ON information or OFF information of the backlight of the operation unit set in advance together with the backlight luminance level of the backlight luminance value table corresponds to ON / OFF of the camera light, and when the camera light is OFF The backlight of the operation unit when the imaging environment is bright and the imaging frame rate is high is set to OFF, and the backlight of the operation unit when the imaging environment is dark and the imaging frame rate is low is set to ON. 19. The backlight control method for a camera-equipped cellular phone according to claim 17, wherein the backlight control method is used. The brightness value level of the backlight of the LCD display unit and the ON information or OFF information of the operation unit, which are set in advance in the backlight luminance value table corresponding to ON / OFF of the camera light, can be arbitrarily set by the user. 19. The backlight control method for a camera-equipped cellular phone according to claim 15, wherein the backlight control method is used. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a backlight of an LCD display unit corresponding to a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the camera module is set in advance, and when the camera module is activated and the LCD display unit is in a finder display state, the imaging frame of the camera module A first step of detecting a rate, a second step of detecting whether or not a camera light that is turned on and off as needed by the user while the camera module is activated, and the camera in the second step When detecting the turn-off of the light, the backlight brightness value table is searched to Detecting the predetermined brightness level when the camera light corresponding to the imaging frame rate of the camera module detected in the step is turned off, and notifying the detected brightness level to the backlight section of the LCD display section. When the lighting of the camera light is detected in the third step for instructing light emission by the driving current corresponding to the luminance level and the second step, the backlight luminance value table is searched and detected in the first step. The predetermined luminance level when the camera light is lit corresponding to the imaging frame rate of the camera module is detected, and the detected luminance level is notified to the backlight unit of the LCD display unit, and the luminance level is supported. The fourth step of instructing light emission by the driving current to be performed, and the user's key operation or the elapse of a predetermined time The fifth step of monitoring the stop of the activation of the camera module, and when detecting the activation of the camera module in the fifth step, the detection of the imaging frame rate of the camera module is continued, and the imaging frame rate A sixth step of detecting a change, and when the change of the imaging frame rate is detected in the sixth step, the process proceeds to the second step, and when the turning off of the camera light is detected in the second step, the back A luminance level when the camera light is turned off corresponding to the frame rate detected in the sixth step is detected from the light luminance value table, and the LCD display unit is detected by the drive current corresponding to the newly detected luminance level. When the backlight is turned on and lighting of the camera light is detected in the second step, the backlight is The brightness level when the camera light is turned on corresponding to the frame rate detected in the sixth step is detected from the brightness value table, and the LCD display unit is detected by the drive current corresponding to the newly detected brightness level. After the backlight is turned on, the processing from the fifth step to the sixth step is executed, and when the change in the frame rate is not detected in the sixth step, the process proceeds to the fifth step and the fifth step When the stop of activation of the camera module due to the user's key operation or the elapse of a predetermined time is detected, the viewfinder display of the LCD display unit is stopped and switched to a predetermined default display, and the activation of the camera module is stopped. And a backlight control method for a camera-equipped mobile phone. In a mobile phone equipped with a camera module that outputs image data by switching the imaging frame rate, which is the image capture period according to the imaging environment, and a backlight brightness adjustment function, the LCD display unit can be used for multiple frame rates. A backlight luminance value table that presets a predetermined luminance level for controlling the luminance of the light and ON information or OFF information for controlling light emission of the backlight of the operation unit or stop of the light emission, When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module, and when the camera module is activated, the user turns ON / OFF as necessary A second step of detecting whether or not the camera light to be turned on, When the camera light is detected to be turned off, the predetermined value when the camera light is turned off corresponding to the imaging frame rate of the camera module detected in the first step by searching the backlight luminance value table is determined. A third step of detecting the luminance level, informing the backlight unit of the LCD display unit of the detected luminance level and instructing light emission by a drive current corresponding to the luminance level; and the backlight luminance value table And detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and notifying the detected ON information to the backlight unit of the operation unit And a fourth step for instructing the backlight to emit light, and the backlight luminance value table is searched for the first step. Detecting backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in step, and notifying the detected OFF information to the backlight unit of the operation unit and stopping the backlight emission When the lighting of the camera light is detected in the fifth step and the second step, the backlight luminance value table is searched and the imaging frame rate of the camera module detected in the first step is detected. A predetermined luminance level when the corresponding camera light is lit is detected, the detected luminance value level is notified to the backlight unit of the LCD display unit, and light emission by a driving current corresponding to the luminance level is instructed. And the camera module detected in the first step by searching the backlight luminance value table. A seventh step of detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the image, notifying the detected ON information to the backlight unit of the operation unit, and instructing the backlight to emit light; The backlight brightness value table is searched to detect backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and the detected OFF information is used as the operation The eighth step of notifying the backlight unit of the unit and instructing the stop of the backlight emission, the instruction of the operation unit backlight emission in the fourth step or the seventh step, the fifth step or the eighth step After the instruction to stop the light emission of the operation unit backlight in the step, the camera modi A ninth step for monitoring the stop of the activation of the camera module, and when detecting that the camera module is being activated in the ninth step, the detection of the imaging frame rate of the camera module is continued, and the change of the imaging frame rate The tenth step of detecting the change of the imaging frame rate, and when the change of the imaging frame rate is detected in the tenth step, the process proceeds to the second step, and when the turning off of the camera light is detected in the second step, the third step In step, the luminance level when the camera light is turned off corresponding to the imaging frame rate detected in the tenth step is detected from the backlight luminance value table, and the drive current corresponding to the newly detected luminance level is used to detect the luminance level. After the backlight of the LCD display unit emits light and the processing of the fourth step or the fifth step is executed, there is When the lighting of the camera light is detected in the second step, the luminance level at the time of lighting the camera light corresponding to the imaging frame rate detected in the tenth step from the backlight luminance value table in the sixth step is determined. After the detection, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level, the sixth step or the seventh step is executed, and then the ninth step, The process of step 10 is executed, and when the change in the frame rate is not detected in the tenth step, the process proceeds to the ninth step, and in the ninth step, the camera module When the start stop is detected, the finder display on the LCD display is stopped and switched to a predetermined default display. A camera control mobile phone backlight control method, comprising: an eleventh step of stopping activation of the camera module. In a mobile phone having a camera module that outputs image data by switching an imaging frame rate that is an image capturing period according to an imaging environment and a backlight luminance adjustment function, a backlight of an LCD display unit corresponding to a plurality of frame rates A backlight luminance value table in which a predetermined luminance level for controlling the luminance of the camera module is set in advance, and when the camera module is activated and the LCD display unit is in a finder display state, the imaging frame of the camera module A first step of detecting a rate, a second step of detecting whether or not a camera light that is turned on and off as needed by the user while the camera module is activated, and the camera in the second step When detecting the turn-off of the light, the backlight brightness value table is searched to Detecting the predetermined brightness level when the camera light corresponding to the imaging frame rate of the camera module detected in the step is turned off, and notifying the detected brightness level to the backlight section of the LCD display section. When the lighting of the camera light is detected in the third step for instructing light emission by the driving current corresponding to the luminance level and the second step, the backlight luminance value table is searched and detected in the first step. The predetermined luminance level when the camera light is lit corresponding to the imaging frame rate of the camera module is detected, and the detected luminance level is notified to the backlight unit of the LCD display unit, and the luminance level is supported. The fourth step of instructing light emission by the driving current to be performed, and the user's key operation or the elapse of a predetermined time The fifth step of monitoring the stop of the activation of the camera module, and when detecting the activation of the camera module in the fifth step, the detection of the imaging frame rate of the camera module is continued, and the imaging frame rate A sixth step of detecting a change, and when the change of the imaging frame rate is detected in the sixth step, the process proceeds to the second step, and when the turning off of the camera light is detected in the second step, the back A luminance level when the camera light is turned off corresponding to the frame rate detected in the sixth step is detected from the light luminance value table, and the LCD display unit is detected by the drive current corresponding to the newly detected luminance level. When the backlight is turned on and lighting of the camera light is detected in the second step, the backlight is The brightness level when the camera light is turned on corresponding to the frame rate detected in the sixth step is detected from the brightness value table, and the LCD display unit is detected by the drive current corresponding to the newly detected brightness level. After the backlight is turned on, the processing from the fifth step to the sixth step is executed, and when the change in the frame rate is not detected in the sixth step, the process proceeds to the fifth step and the fifth step When the stop of activation of the camera module due to the user's key operation or the elapse of a predetermined time is detected, the viewfinder display of the LCD display unit is stopped and switched to a predetermined default display, and the activation of the camera module is stopped. A backlight control program for a camera-equipped mobile phone that causes the CPU to execute the above steps. In a mobile phone equipped with a camera module that outputs image data by switching the imaging frame rate, which is the image capture period according to the imaging environment, and a backlight brightness adjustment function, the LCD display unit can be used for multiple frame rates. A backlight luminance value table that presets a predetermined luminance level for controlling the luminance of the light and ON information or OFF information for controlling light emission of the backlight of the operation unit or stop of the light emission, When the camera module is activated and the LCD display unit is in the finder display state, a first step of detecting the imaging frame rate of the camera module, and when the camera module is activated, the user turns ON / OFF as necessary A second step of detecting whether or not the camera light to be turned on, When the camera light is detected to be turned off, the predetermined value when the camera light is turned off corresponding to the imaging frame rate of the camera module detected in the first step by searching the backlight luminance value table is determined. A third step of detecting the luminance level, informing the backlight unit of the LCD display unit of the detected luminance level and instructing light emission by a drive current corresponding to the luminance level; and the backlight luminance value table And detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and notifying the detected ON information to the backlight unit of the operation unit And a fourth step for instructing the backlight to emit light, and the backlight luminance value table is searched for the first step. Detecting backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in step, and notifying the detected OFF information to the backlight unit of the operation unit and stopping the backlight emission When the lighting of the camera light is detected in the fifth step and the second step, the backlight luminance value table is searched and the imaging frame rate of the camera module detected in the first step is detected. A predetermined luminance level when the corresponding camera light is lit is detected, the detected luminance value level is notified to the backlight unit of the LCD display unit, and light emission by a driving current corresponding to the luminance level is instructed. And the camera module detected in the first step by searching the backlight luminance value table. A seventh step of detecting ON information of the backlight of the operation unit corresponding to the imaging frame rate of the image, notifying the detected ON information to the backlight unit of the operation unit, and instructing the backlight to emit light; The backlight brightness value table is searched to detect backlight OFF information of the operation unit corresponding to the imaging frame rate of the camera module detected in the first step, and the detected OFF information is used as the operation The eighth step of notifying the backlight unit of the unit and instructing the stop of the backlight emission, the instruction of the operation unit backlight emission in the fourth step or the seventh step, the fifth step or the eighth step After the instruction to stop the light emission of the operation unit backlight in the step, the camera modi A ninth step for monitoring the stop of the activation of the camera module, and when detecting that the camera module is being activated in the ninth step, the detection of the imaging frame rate of the camera module is continued, and the change of the imaging frame rate The tenth step of detecting the change of the imaging frame rate, and when the change of the imaging frame rate is detected in the tenth step, the process proceeds to the second step, and when the turning off of the camera light is detected in the second step, the third step In step, the luminance level when the camera light is turned off corresponding to the imaging frame rate detected in the tenth step is detected from the backlight luminance value table, and the drive current corresponding to the newly detected luminance level is used to detect the luminance level. After the backlight of the LCD display unit emits light and the processing of the fourth step or the fifth step is executed, there is When the lighting of the camera light is detected in the second step, the luminance level at the time of lighting the camera light corresponding to the imaging frame rate detected in the tenth step from the backlight luminance value table in the sixth step is determined. After the detection, the backlight of the LCD display unit is caused to emit light by the drive current corresponding to the newly detected luminance level, the sixth step or the seventh step is executed, and then the ninth step, The process of step 10 is executed, and when the change in the frame rate is not detected in the tenth step, the process proceeds to the ninth step, and in the ninth step, the camera module When the start stop is detected, the finder display on the LCD display is stopped and switched to a predetermined default display. A camera control backlight control program for causing a CPU to execute an eleventh step of stopping activation of the camera module.

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