JP2006098098A - Cellular phone having moisture sensing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellular phone equipped with a moisture sensor. <P>SOLUTION: In the cellular phone equipped with a CCD camera part 21, the CCD camera part 21 is constituted of a CCD camera having sensitivity up to a near infrared region and a visible light cutting filter is provided to the invalid pixel region of the CCD imaging element of the CCD camera part 21 while a near infrared light cutting filter is provided to the valid pixel region of the CCD imaging element of the CCD camera part 21. The image of the valid pixel region photographed by the CCD camera part 21 is displayed on a display device and water content is calculated on the basis of the output from the imaging element of the invalid pixel region and the calculation result is displayed on a display part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile phone having a camera function.

  Various types of liquid crystal displays having a liquid crystal sub-display on the back and mobile phones with camera functions have been put into practical use. In recent years, mobile phones have been proposed not only as communication devices but also as those capable of receiving radio and having a built-in TV tuner and capable of displaying TV broadcasts on a liquid crystal display (for example, see Patent Document 1).

  As described above, in the mobile phone, not only the communication function but also various added values are noticed by the user, and can be differentiated from other models.

  In addition, when selecting cosmetics and pharmaceuticals, it is an important factor to grasp the moisture content contained in the skin. In recent years, there has been a desire to easily know the moisture content of one's own skin from the improvement of health orientation. Therefore, if a moisture sensor capable of measuring the moisture content of the skin is provided in the mobile phone, the user can freely measure the moisture content of his / her skin at any time, which is optimal for skin care.

  By the way, the applicants already photographed with a CCD camera in a first state that includes a CCD camera, a visible light transmission filter, and an infrared light transmission filter, and the lens of the CCD camera is covered with the visible light transmission filter. Including the measurement area based on the image data of the visible light image and the image data of the infrared light image captured by the CCD camera in the second state where the lens of the CCD camera is covered with the infrared light transmission filter. A water content measuring device for calculating a water content distribution has been proposed (see Patent Document 2).

And it can comprise so that a user may recognize distribution of the moisture content of a measurement area by connecting this apparatus to a display using the above-mentioned moisture content measuring device.
JP 2004-104207 A JP 2002-98633 A

  However, the device described in Patent Document 2 described above requires a mechanism for switching between a visible light transmission filter and an infrared transmission filter, and the device is large and difficult to mount on a mobile phone.

  This invention makes it a subject to provide the mobile telephone provided with the moisture sensor in view of the above-mentioned conventional request.

  According to the present invention, in a mobile phone equipped with a CCD camera, the CCD camera is composed of a CCD camera having sensitivity up to the near-infrared region, and the wavelength of the near-infrared light in the effective pixel region of the CCD image sensor of the CCD camera. A filter having a pass band in the band and a pass blocking band in the visible light wavelength range is provided, and the water content is calculated based on the output from the imaging device in the non-effective area.

  According to the present invention, a second filter having a pass band in the wavelength range of near infrared light and a pass band in the wavelength range of visible light is provided in the effective pixel area of the CCD image pickup device of the CCD camera. An image of the effective pixel area captured by the camera can be displayed on the display device, and the water content can be calculated based on the output from the image sensor in the non-effective area, and the result can be displayed on the display unit. .

  Further, the present invention includes a camera light source in the vicinity of the CCD camera, and when the CCD camera and the light source measure water content, disturbance light is incident between the measured part, the CCD camera, and the light source. It is preferable to provide means for preventing disturbance light incidence to be prevented.

  According to the present invention described above, in a mobile phone having a camera function, the pixel allocation of the pixel area of the CCD camera can be used effectively, and image data can be used separately for moisture content measurement and display, so A moist state can be easily checked.

  Further, by providing disturbance light incident preventing means for preventing the incidence of disturbance light, measurement noise can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a folding-type camera-equipped cellular phone 1 according to an embodiment of the present invention. The cellular phone 1 includes a first housing 2 and a second housing 3, and the first housing 2 and the second housing 3 are connected via a hinge 4. The first casing 2 and the second casing 3 are configured to be foldable as shown in FIGS. 2 and 3 by freely moving around the hinge 4 as an axis.

  As shown in FIG. 1, the mobile phone 1 includes a first display unit 5 in a first housing 2. The first display unit 5 is arranged so as to be located inside when the mobile phone 1 is folded. The first display unit 5 is composed of a liquid crystal display or the like, and displays an image based on image data given through a first display driver unit 43 described later. In addition, the upper portion of the first display unit 5 is provided with a speaker 6 used during a call or the like.

  The second housing 3 includes an input button group 7 including keys for inputting numbers and characters, a function button group 8 for performing various settings / function switching in the mobile phone 1, an ON / OFF power A multi-guide button 13 composed of a power button 9 for switching off and a four-way button for selecting and determining up / down / left / right on the function selection screen and a determination button is provided so that the user can operate. Furthermore, the second casing 3 includes a microphone 14 for calling at the bottom. As shown in FIG. 3, a shutter button 10 that is operated to activate the shutter function is provided on the lower side surface of the second housing 3. An antenna 25 is provided on the upper part of the second housing 3.

  As shown in FIG. 2, the light unit 22 and the camera unit 21 are arranged in order from the hinge 4 side on the back surface of the first display unit 5 of the first housing 2.

  The second display unit 20 is arranged so as to be positioned outside the housing when the mobile phone 1 is folded, and is configured by a liquid crystal display or the like. Here, the displayable area of the second display unit 20 is smaller than that of the first display unit 5, but may be larger or the same size. The second display unit 20 displays image data obtained by photographing through a second display driver unit 44, which will be described later, and the measured moisture content of the skin.

  Thus, each of the first display unit 5 and the second display unit 20 is configured such that the display screen is directed to the outside on the side facing the outside of the first casing 2 or the second casing 3 in the opened state. Is provided. In particular, the second display unit 20 is provided so that the display screen faces the outside on the side facing the outside of either the first casing 2 or the second casing 3 in a folded state.

  When displaying these images, the image data and measurement data sent from the second display driver unit 44 to the second display unit 20 are displayed so that the direction of the hinge 4 is upward when displayed. The second display unit 20 displays the image so that the direction of the hinge 4 is upward, so that when the user uses the cellular phone 1 in a folded state, the user uses the hinge upward. The orientation of the second housing 3 does not change whether the user opens or closes the mobile phone 1.

  The CCD camera unit 21 includes an imaging lens and an image sensor of a CCD image sensor. The CCD camera unit 21 is composed of a high-sensitivity CCD camera having sensitivity up to the near-infrared region in order to measure not only photographing but also water content of the skin as will be described later. As shown in the sensitivity characteristic diagram of FIG. 6, the CCD camera unit 21 has a sensitivity up to the near-infrared region as compared with the conventional CCD camera, and has a sensitivity up to a water absorption wavelength peripheral band of 900 nm to 1200 nm. . The water content can be detected by detecting the change in the amount of light in this band. FIG. 7 is a diagram showing the relationship between the reflectance (%) and the incident wavelength (nm). From FIG. 7, it can be seen that the absorption wavelengths of water are 1.45 μm and 1.95 μm, but the peripheral wavelength band also changes as the water content increases. Therefore, if the CCD camera unit 21 having sensitivity up to the near infrared region is used, the water content can be detected.

  The CCD camera unit 21 enters the CCD image sensor 29 with the light reflected by the subject and incident on the photographing lens. As shown in FIG. 2, the CCD camera unit 21 is provided on the back surface of the first display unit 5 and between the hinge 4 and the second display unit 20 when the mobile phone 1 is folded. . Furthermore, in this embodiment, as shown in FIG. 3, the CCD camera unit 21 is provided on the second casing 2 in a flat state without unevenness. When taking a picture with the camera unit 21 with the cellular phone 1 opened, the user takes a picture with the second casing 3. As will be described later, when measuring the moisture content of the skin, the skin is photographed with the CCD camera unit 21 in close contact with the skin.

  The light unit 22 is used as an auxiliary light source when the CCD camera unit 21 performs normal imaging, and is used as a light source for measurement when measuring the moisture content of the skin. This light unit uses a light bulb having a broadband spectral characteristic from the visible light region to the near infrared region. FIG. 8 shows an example of an emission spectrum of a halogen bulb that can be used as a light portion. FIG. 8 shows spectral characteristics when the electric power of the bulb is constant.

  On the back of the input button group 7 and the function button group 8 of the second housing 3 are an antenna part 25 and a helical part that can be raised and lowered, a battery part (not shown) for storing a battery, and a speaker for ringing ( (Not shown).

  Next, the internal configuration of the mobile phone 1 of this embodiment will be described with reference to FIG. 4 which is a block diagram. The cellular phone 1 includes first and second display units 5 and 20, a shutter button 10, a CCD camera unit 21, a light unit 22, an antenna unit 25, a radio unit 50, a communication control unit 51, first and second memories 42 and 48. , First and second display driver units 43 and 44, first and second backlights 45 and 46, a control unit 40 for controlling the function of each unit, an image processing unit 41, first and second operation button groups 47 and 24, and an open / close detection unit 49.

  The control unit 40 configured by a microprocessor or the like controls functions of each unit, such as a shutter operation function, a backlight function, an auxiliary light source function, and a display function. The image processing unit 41 includes an amplification unit, an A / D (analog / digital) conversion unit, and a signal processing unit which are not shown. The amplifying unit receives and amplifies an electric signal from the camera unit 21 and outputs the amplified signal to the A / D conversion unit. The A / D converter converts the electric signal (analog) converted by the amplifier into a digital signal and outputs image data. The image data is given to the first memory 42.

  The CCD camera unit 21 and the image processing unit 41 are imaging units that receive reflected light from a subject, convert it into an electrical signal, and output it as image data in units of frames. The first memory 42 temporarily stores image data of a plurality of frames given continuously under the control of the control unit 40. For example, when input new image data is input and stored, image data that has already been stored for a long time among the plurality of image data stored in the first memory 42 is erased or input. Overwritten with new image data.

  The control unit 40 transmits a control signal to the first and second display driver units 43 and 44, reads out the image data stored in the first memory 42, and sends the image data to the first and second display driver units 43 and 44, respectively. give. The first and second display driver units 43 and 44 are arranged in accordance with the data to be displayed on the first and second display units 5 and 20, that is, according to the data read from the first memory 42. A drive voltage is applied to each of the pixel electrodes 5 and 20.

  The first and second backlights 45 and 46 are composed of light emitting diodes or the like as light emitting elements, and irradiate the first and second display portions 5 and 20 with light to increase the brightness of the display image. Control of turning on and off the first and second backlights 45 and 46 and brightness adjustment are performed by the control unit 40. The first and second backlights 45 and 46 can be independently controlled. When an image is displayed on the first display unit 5, the first backlight 45 is displayed on the second display unit 20. When displayed, the second backlight 46 is controlled to be lit.

  The first operation button group 47 includes the input button group 7 and the function button group 8 of the second casing 3 described above.

  The shutter button 10 is pressed for a shutter operation. When the shutter button 10 is pressed, a shutter instruction 56 is given to the control unit 40. When the control unit 40 receives the shutter instruction 56, the control unit 40 reads out the image data that the user desires to save from among the plurality of image data continuously written and temporarily stored in the first memory 42, and the second Write to memory 48 and store. Thereby, the image data desired by the user is stored in the second memory 48.

  When the function button group 8 is operated to select the mode for measuring the moisture content of the skin, the information is given to the control unit 40 from the first operation button group 47, and the control unit 40 detects the moisture content. It becomes the control action. When the skin moisture content measurement mode is pressed, when the shutter button 10 is pressed, the moisture content of the object to be measured is measured as will be described later.

  The open / close detection unit 49 detects whether or not the mobile phone 1 is folded. A detection switch (not shown) is provided inside the hinge 4 to detect the open / closed state, and a detection signal 53 corresponding to the detected state (open state or closed state) is output to the control unit 40. . The control unit 40 can determine whether the mobile phone 1 is folded (closed state) or in an open state based on the detection signal 53 input from the detection switch.

  The antenna unit 25, the radio unit 50, and the communication control unit 51 transmit and receive voice data, character data, image data, and the like according to the control of the control unit 40 when performing radio communication with a base station (not shown) via radio waves. . The received data is stored in the second memory 48 by the control unit 40.

  The control unit 40 switches the display unit that displays an image based on the image data temporarily stored in the first memory based on the detection result of the open / close detection unit 49. When the open / close detection unit 49 detects that the cellular phone 1 is folded, the control unit 40 outputs the image data from the first memory 42 to the second display driver unit 44, and the second display unit 20 displays an image. When the open / close detection unit 49 detects that the mobile phone 1 is not folded (opened), the control unit 40 outputs the image data from the first memory 42 to the first display driver unit 43, An image is displayed on the first display unit 5.

  As described above, the cellular phone 1 according to the present invention measures the water content using the CCD camera unit 21 provided in the cellular phone 1. For this reason, the CCD camera unit 21 has sensitivity up to the near-infrared region, and has sensitivity up to the water absorption wavelength peripheral band of 900 nm to 1200 nm.

  As shown in FIG. 9, in the CCD camera unit 21, the CCD image pickup device 29 forms a pixel region 29a by arranging a plurality of light receiving elements in an area. As described above, each pixel is composed of a high-sensitivity CCD having sensitivity up to the water absorption wavelength peripheral band of 900 nm to 1200 nm.

  Normally, a CCD camera does not use all information captured by a CCD image sensor as an image, and some peripheral pixel data is not used as image data used for a display device or the like. For this reason, the pixel region 29a of the CCD camera unit 21 is composed of an effective pixel region 29b and a surrounding non-effective pixel region 29c, and each pixel in both pixel regions is composed of a sensor having the same sensitivity. The water content measuring device of the present invention makes good use of the pixel distribution of the pixel region 29a of the CCD camera unit 21 and uses image data for water content measurement and display.

  For this reason, a near-infrared cut filter having a pass-stop band in the near-infrared wavelength region and a pass-band in the visible light wavelength region is provided on the effective pixel region 29b used as display image data. A visible light cut filter having a pass band in the near-infrared wavelength region and a pass-stop band in the visible light wavelength region is provided on the non-effective pixel region 29c used as data for measuring the water content. Yes.

  As described above, a near-infrared cut filter is provided on the front surface of the light receiving unit of the CCD of the high-sensitivity CCD camera unit 21 with different transmission characteristics, that is, on the effective pixel region 29b, and on the non-effective pixel region 29c. If a visible light cut filter is provided, an image can be taken in the central effective pixel region 29b, and the water content can be detected in the peripheral pixels.

  When measuring the moisture content of the skin, as shown in FIG. 5, the CCD camera unit 21 is brought into close contact with the skin 30, the shutter button 10 is pressed, and the light from the light unit 22 is irradiated onto the skin 30. The CCD camera unit 21 receives the reflected light. In this embodiment, a protective cover 21a is provided in front of the CCD camera unit 21 and the light unit 22 as shown in FIG. The skin moisture content is measured with the skin 30 in close contact with the protective cover 21a. In this embodiment, a light unit 22 and a CCD camera unit 21 are disposed at a position recessed from the protective cover 21a in order to block ambient light. The light emitted from the light unit 22 is reflected by the skin and returns to the light receiving unit of the CCD camera unit 21. The moisture content of the skin is determined from the amount of light received by the light receiving unit. By disposing the light unit 22 and the CCD camera unit 21 at a deep position, the optical path can be measured without being affected by disturbance light.

  For example, as shown in FIG. 10 (a), the CCD camera unit 21 of the mobile phone 1 is brought into close contact with a part of the palm, and the shutter button 10 is pressed so that a part of the palm (a region surrounded by a square in the figure). The CCD camera unit 21 takes a picture with one exposure. In this exposure, in order to reduce noise such as natural light, photographing is performed with the CCD camera unit 21 as close to the palm as possible. At this time, the palm is irradiated with light from the lamp 22 provided in the CCD camera unit 21, and the reflected light is guided to the pixel region 29 a in the CCD camera unit 21. As shown in FIG. 7B, the pixel area 29a is given display image data by visible light that has passed through the near-infrared cut filter to the effective pixel area 29b, and the non-effective pixel area 29c has visible light. Image data for water content detection that has passed through the light cut filter is provided.

  All the image data of the non-effective pixel area 29c and the effective pixel area 29b imaged by the CCD camera unit 21 are given to the first memory 42 and stored therein. The image data stored in the first memory 42 is taken into the control unit 40 under the control of the control unit 40, and a predetermined process is performed. The control unit 40 includes a memory in which a program for controlling operations is written, a work memory for capturing image data, and the like. These memories may be provided inside or outside the control unit 40, and are appropriately selected as necessary.

  The control unit 40, among the image data picked up by the CCD camera unit 21 for detecting the water content, has a wavelength in the visible light region cut by the visible light cut filter and receives the wavelength in the near infrared region, and the non-effective pixel region 29c. As described later, the water content is calculated based on the image data.

  Further, the control unit 40 takes in the image data of visible light transmitted through the near-infrared cut filter received by the effective pixel region 29b in order to display the captured image on the first and second display units 5 and 20, 1. Give to 2nd display parts 5 and 20. On the first and second display units 5 and 20, an image of the effective pixel region 29b captured by the CCD camera unit 21 is displayed. In addition, the first and second display units 5 and 20 are configured to display the measured moisture content in a superimposition or by dividing the image area of the first and second display units 5 and 20.

  Next, an example of a method for calculating the water content will be described. In the present invention, the control unit 40 calculates the water content using a water content calculation formula corresponding to the measurement target. For this reason, the calculation unit data as described later is stored in the control unit 40.

  As described above, since the water content calculation formula corresponding to the measurement target is used, the teaching data is measured for each measurement target, and the water content calculation formula is obtained from the measurement data by multiple regression. In general, quantitative analysis using near-infrared light in a multi-wavelength band can be expressed as follows using a multiple regression equation.

C = K ₀ + K ₁ × log (1 / R ₁ )
+ K ₂ × log (1 / R ₂ )
+ K ₃ × log (1 / R ₃ )
+ ...
+ K _n × log (1 / R _n )
Here, C is the water content, K _n is a constant obtained by multiple regression, log (1 / R _n ) is the absorbance in the measurement wavelength band, and R _n is the reflectance in the measurement wavelength band.

  In the present invention, since the wavelength band to be used is only one band of about 900 nm to 1200 nm, the above formula is as follows.

C = K ₀ + K ₁ × log (1 / R ₁ )
Here, C is the water content, K ₀ and K ₁ are constants obtained by multiple regression, log (1 / R ₁ ) is the absorbance in the 900 nm to 1200 nm band, and R ₁ is the reflectance in the 900 nm to 1200 nm band.

  Calculate the absorbance from the reflectance at the time of measurement of the finger data with known moisture content, determine the constant by multiple regression from the relationship between the moisture content and the absorbance, obtain the moisture content calculation formula, and use this calculation formula data as the control unit 40.

  In addition, the reflectance calculation method can derive | lead-out a reflectance with a simple formula from an actual measurement value by measuring the standard reflecting plate which has a known reflectance beforehand. For example, when the reflectance of the actual measurement value is obtained using a standard reflector having a reflectance of 95% and 5%, the following equation is obtained.

R = 0.05 + (0.95-0.05) × (Data−DB) / (DW−DB)
Here, R is the reflectance of the object, Data is the object measurement data, DB is the standard reflector measurement data with a reflectance of 5%, and DW is the measurement data of the standard reflector with a reflectance of 95%.

  The water content can be calculated from the reflectance thus calculated by applying the above multiple regression equation.

  In the present invention, since the water content calculation formula can be expressed by a simple primary formula, depending on the measurement object, a conversion table between the object measurement data and the water content is created and the table is stored in the memory. Thus, the water content can be easily measured.

  Next, a method for measuring the moisture content of the skin using the moisture content measuring device according to the present invention will be described with reference to FIG. 11 and FIG. The example shown in FIG. 11 and FIG. 12 shows a case where the measured representative moisture content of the skin is displayed.

  As shown in FIGS. 11 and 12, a part of the palm (area surrounded by a square in the figure) is photographed by the CCD camera unit 21 by one exposure (see FIG. 10A). In this exposure, the lens of the CCD camera unit 21 is photographed as close to the palm as possible in order to reduce noise such as natural light. At this time, the palm is irradiated with light from a lamp provided in the CCD camera unit 21, and the reflected light is guided to the pixel region 29 a in the CCD camera unit 21. As shown in FIG. 11 (b), the pixel area 29a is given display image data by visible light that has passed through the near-infrared cut filter to the effective pixel area 29b, and the non-effective pixel area 29c is visible. Image data for water content detection that has passed through the light cut filter is given, and all image data including valid and invalid are stored in the first memory 42 (step S1). Then, the control unit 40 extracts near-infrared light receiving pixel data from the non-effective pixel region 29c that has passed through the visible light cut filter from the first memory 42 (step S2). In addition, the control unit 40 controls the first and second display units 5 and 20 to display an image based on the image data, that is, the image of the palm portion in the effective pixel region 29b.

  Subsequently, the control unit 40 calculates the water content for each near-infrared light receiving pixel data based on the reflectance calculated and stored in advance and the above-described calculation formula (step S3). And the control part 40 calculates statistical values, such as an average value, from the moisture content data for every calculated pixel (step S4). In this example, the average water content is obtained from the average value of all the pixel data, and the maximum value data with the largest water content and the minimum value data with the smallest water content are obtained. And as shown in FIG.11 (c), each data of a visible image and water content statistics is displayed on the display screen 40 of the 1st, 2nd display parts 5 and 20 together (step S5), and water content Whether or not to end the measurement operation is determined (step S6). If not, the process returns to step S1 to repeat the above-described operation.

  Next, another method for measuring the moisture content of the skin using the moisture content measuring device according to the present invention will be described with reference to FIG. 13 and FIG. The example shown in FIGS. 13 and 14 shows a case where the distribution of the measured moisture content of the skin is calculated and displayed.

  As shown in FIGS. 13 and 14, a part of the palm (area surrounded by a square in the figure) is photographed by the CCD camera unit 21 by one exposure (see FIG. 13A). In this exposure, the lens of the CCD camera unit 21 is photographed as close to the palm as possible in order to reduce noise such as natural light. At this time, the palm is irradiated with light from a lamp provided in the CCD camera unit 21, and the reflected light is guided to the pixel region 29 a in the CCD camera unit 21. Then, as shown in FIG. 13B, the pixel area 29a is given display image data by visible light that has passed through the near-infrared cut filter to the effective pixel area 29b, and the non-effective pixel area 29c is visible. Image data for water content detection that has passed through the light cut filter is given, and all image data including valid and invalid are stored in the first memory 42 (step S11). Then, the control unit 40 extracts near-infrared light receiving pixel data from the non-effective pixel region 29c that has passed through the visible light cut filter from the first memory 42 (step S12). In addition, the control unit 40 controls the first and second display units 5 and 20 to display an image based on the image data, that is, the image of the palm portion in the effective pixel region 29b.

  Subsequently, the control unit 40 calculates the water content for each near-infrared light receiving pixel data based on the reflectance calculated and stored in advance and the above-described calculation formula (step S13). And the control part 40 calculates | requires the pixel position while calculating | requiring the maximum value data with most moisture content and the minimum value data with the least moisture content of water content from the calculated moisture content data for every pixel (step S14).

  In the case of skin or the like, since the photographing range is narrow, there is no problem even if the water content distribution inclination direction is regarded as one direction. As shown in FIG. 13C, when the upper right pixel portion has the maximum water content and the pixel portion located diagonally to the lower left of the pixel portion has the minimum water content, as shown in FIG. It can be considered that the water content changes in an oblique direction. Therefore, the control unit 40 determines the water content distribution inclination direction from the positions of the maximum water content pixel and the minimum water content pixel (step S15). Subsequently, using the water content data around the visible image, the water content corresponding to the visible image is calculated by linear interpolation in the water content distribution inclination direction (step S16).

  Thereafter, a water content distribution map is created from the water content corresponding to the calculated visible image pixel (step S17). Then, the generated moisture content distribution map and the visible image are displayed on the display screen 40 of the first and second display units 5 and 20 (step S18), and it is determined whether or not to end the moisture content measurement operation (step S18). Step S19) If not finished, the process returns to Step S11 and the above-described operation is repeated. In addition, you may comprise so that the moisture content of a representative position may be displayed with a moisture content distribution map.

  As described above, the moisture content measuring apparatus of the present invention provides a visible light cut filter in the non-effective pixel data portion that is normally excluded without switching the filter, and performs moisture measurement using the pixel data in this region. Therefore, a visible image and water | moisture content measurement can be performed by one imaging | photography.

  As described above, in order to accurately measure the moisture content of the skin, it is preferable that the CCD camera unit 21 is brought into close contact with the skin to eliminate external noise. For this reason, as shown in FIG. 15 and FIG. 16, when there are irregularities such as steps between the CCD camera unit 21 and the housing 2, as shown in FIG. 17, the light unit 22 and the CCD camera unit 21. A light-shielding adapter 21b is attached so as to cover the skin, and the moisture content of the skin is measured with the adapter 21b in close contact with the skin 30. With this configuration, the light emitted from the light unit 22 is reflected by the skin and returns to the light receiving unit of the CCD camera unit 21. And the moisture content of skin is calculated | required from the light quantity which the light-receiving part received. At this time, the optical path is not affected by disturbance light by the light blocking adapter 21b.

  In the above-described embodiment, the folding type mobile phone has been described. However, if the mobile phone has a camera function, the shape of the mobile phone is not affected. The invention is applicable.

It is a front view which shows the mobile telephone concerning embodiment of this invention. It is a front view of the folded state of the mobile phone concerning an embodiment of this invention. It is a side view of the folded state of the mobile phone concerning an embodiment of this invention. It is a block diagram which shows the internal circuit structure of the mobile telephone concerning embodiment of this invention. It is a side view of the folded state of the principal part of the state which is measuring the moisture content of skin using the mobile telephone concerning embodiment of this invention. It is a figure which shows the sensitivity characteristic of a CCD camera. It is a characteristic view which shows the relationship between a reflectance (%) and incident wavelength (nm). It is a characteristic view which shows the example of the emission spectrum of the halogen bulb which can be used as a light part. It is a schematic diagram which shows the pixel area | region of the image pick-up element part of the CCD camera used for this invention. It is a model diagram which shows the relationship between imaging | photography of the mobile telephone concerning embodiment of this invention, and the pixel area of a CCD camera. It is a schematic diagram which shows the case where the moisture content of skin is measured and the representative moisture content of skin is displayed. It is a flowchart which shows operation | movement in the case of measuring the moisture content of skin and displaying the representative moisture content of skin. It is a schematic diagram which shows the case where the moisture content of skin is measured and the distribution moisture content of skin is displayed. It is a flowchart which shows operation | movement in the case of measuring the moisture content of skin and displaying the distribution moisture content of skin. It is a front view of the folded state of the mobile phone concerning other embodiments of this invention. It is a side view of the folded state of the mobile phone concerning other embodiments of this invention. It is a side view of the folded state of the principal part of the state which is measuring the moisture content of skin using the mobile telephone concerning other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 1st housing | casing 3 2nd housing | casing 4 Hinge 5 1st display part 6 Speaker 7 Input button group 8 Function button group 9 Power button 13 Multi guide button 10 Shutter button 21 CCD camera part 22 Light part 25 antenna

Claims (3)

In a mobile phone equipped with a CCD camera, the CCD camera is composed of a CCD camera having sensitivity up to the near-infrared region, and a pass band in the wavelength region of near-infrared light in the effective pixel region of the CCD image sensor of the CCD camera. And a filter having a pass blocking band in the wavelength range of visible light, and calculating the water content based on the output from the imaging device in the non-effective region, a mobile phone having a moisture sensor function. An effective pixel area of the CCD image pickup device of the CCD camera is provided with a second filter having a pass blocking band in the near-infrared light wavelength band and a pass band in the visible light wavelength band. 2. The moisture according to claim 1, wherein the image of the pixel region is displayed on the display device, the water content is calculated based on the output from the imaging device in the non-effective region, and the result is displayed on the display unit. A mobile phone having a sensor function. A light source for the camera is provided in the vicinity of the CCD camera, and when the water content is measured by the CCD camera and the light source, disturbance light incidence is prevented between the measured part and the CCD camera and the light source. 3. The mobile phone having a moisture sensor function according to claim 1, further comprising a prevention unit.

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