JP2005333521A - Mobile terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a mobile terminal which requires neither independent driver circuit nor new space, is small and thin, and enables photographing under low luminance. <P>SOLUTION: This mobile terminal has a photographing portion for photographing the image of an object, and a display unit composed of organic EL devices having an information display function and an illuminating function at photographing by the photographing portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile terminal such as a mobile phone provided with an imaging device, and more particularly to a mobile terminal using a display device made of an organic EL element for displaying images and characters.

  Smaller and thinner imaging devices than ever before are now mounted on portable terminals, which are small and thin electronic devices such as mobile phones and PDAs (Personal Digital Assistants). Information can also be transmitted between each other.

  These portable terminals are generally provided with a display unit for displaying information. In recent years, there is a display unit using a display device (hereinafter referred to as an organic EL display device) composed of an organic electroluminescence element (hereinafter referred to as an organic EL device). An organic EL element has a property of emitting light when a light-emitting layer of a thin organic compound is sandwiched between electrodes and energized between the electrodes. A large number of these organic EL elements are arranged on a plane to constitute an organic EL display device, and a figure, a character, etc. are displayed by selectively emitting light.

  Since this organic EL display device is a self-luminous element, there is an advantage that an illumination light source corresponding to the front light of the reflective LCD and the backlight of the transmissive LCD can be eliminated.

  In addition, there has been disclosed a device that uses this organic EL element as a strobe device of a camera instead of a conventional xenon tube and is used as a light emitting unit (for example, see Patent Document 1).

On the other hand, there is a built-in light source for illuminating a subject in preparation for shooting under low brightness using an imaging device mounted on a portable terminal. As a cellular phone having a built-in light source for illumination, a cell phone using a light-emitting diode used for an incoming lamp that emits light when an incoming call is used as a light source for illumination at the time of photographing is disclosed (for example, see Patent Document 2).
JP 2002-116481 A JP 2003-333155 A

  However, the strobe device of the camera described in Patent Document 1 has an advantage that the color temperature can be made variable. However, a driving circuit for driving the light emitting unit is required as in the conventional case, and is incorporated in the camera. Requires a space for housing the drive circuit.

  Moreover, what uses the light emitting diode used for the incoming lamp described in Patent Literature 2 as a light source for illumination at the time of photographing requires a space for placing the incoming lamp, It is not effective in promoting the reduction in size and thickness.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a portable terminal capable of photographing under low luminance, which includes a light source for illumination while maintaining a small and thin shape without requiring an independent drive circuit or a new space. It is intended to obtain.

  The above problem is solved by the following means.

  1) A portable terminal comprising: an imaging unit that captures a subject image; and a display unit that includes an information display function and an organic EL element that has an illumination function during imaging by the imaging unit.

2) having a recording unit for recording the subject image obtained by the imaging unit;
The portable terminal according to 1), wherein the display unit is used as a light source for illumination when shooting a subject image to be recorded in the recording unit.

  3) Having a recording unit that records the subject image obtained by the imaging unit, and using the display unit as a light source for illumination when displaying a preview image and capturing a subject image recorded in the recording unit Terminal.

  4) The mobile terminal according to 3), wherein the luminance when the display unit is used as a light source for illumination is higher when shooting an image for recording in the recording unit than when displaying a preview image.

  5) The portable terminal includes a plurality of display units for displaying information, and a display unit including at least one organic EL element is disposed on a surface on the opening side of the imaging unit. Any mobile device.

  6) An optical member is arranged on the front surface of the display unit made of the organic EL element arranged on the surface on the opening side of the imaging unit, and the optical member makes the viewing angle narrower than that of the other display unit. 5) A portable terminal.

  7) The mobile terminal according to 6), wherein the optical member is an optical member formed in a Fresnel lens shape or a microlens array shape.

  That is, the present inventor uses an information display unit composed of organic EL elements as a light source for illumination at the time of photographing, so that no illumination member, drive circuit and new space are required, that is, a small size. The present inventors have found that a portable terminal capable of photographing under low luminance while being thin can be obtained, and the present invention has been achieved.

  According to the first aspect of the present invention, a portable device capable of photographing under low luminance is provided, which does not require an independent drive circuit or a new space, and has a light source for illumination while maintaining a small and thin shape. A terminal can be obtained.

  According to claim 2, it is possible to suppress power consumption.

  According to the third aspect of the present invention, a portable terminal that can easily monitor a subject before photographing can be provided.

  According to the fourth aspect, it is possible to monitor the subject before photographing, and to suppress the power consumption.

  According to the fifth aspect of the present invention, there is obtained a portable terminal capable of photographing under a low luminance and having a light source for illumination while maintaining a small and thin shape without requiring an independent drive circuit or a new space. be able to.

  According to the sixth aspect, the viewing angle of the display unit composed of the organic EL element can be narrowed, and when the display unit is used as an illumination light source, the illumination light can be efficiently collected on the subject side. it can.

  According to the seventh aspect, the illumination light can be efficiently collected on the subject side while being thin.

  Hereinafter, the present invention will be described in detail with reference to embodiments, but the present invention is not limited thereto.

  FIG. 1 is an external view of a mobile phone T which is an example of a mobile terminal according to the present invention.

  In the cellular phone T shown in the figure, an upper casing 1 as a case having one display portion D1 and a lower casing 2 having an operation button P are connected via a hinge 3. An imaging device S (hereinafter sometimes referred to as a camera module) that is an imaging unit is built in the lower portion of the other display unit D2 in the upper housing 1, and the imaging device S is an outer surface of the upper housing 1. It is arranged to capture light from the side. That is, the mobile phone T includes two display units D1 and D2, and the display unit D2 is disposed on the same surface on the opening side of the imaging device S. In the present invention, the display unit D2 disposed at least on the surface on the opening side of the imaging device S is a display unit configured by an organic EL element.

  The display unit D1 displays various information when the portable terminal is opened as shown in the figure, and the display unit D2 displays information when the portable terminal is folded.

  Below the display portion D1 of the upper housing 1, an arcuate opening 4 and an operation member 5 are arranged to be exposed from the opening 4. By moving the operation member 5 upward in the figure within the opening 4, the focus position at the time of macro photography is set.

  It should be noted that the position of the imaging device may be disposed above or on the side of the display unit D2 in the upper casing 1, and the mobile phone is of course not limited to a folding type.

  FIG. 2 is a block diagram illustrating a schematic internal configuration example of the mobile terminal illustrated in FIG. 1. In the following drawings, in order to avoid duplication of explanation, the same reference numerals are given to the same functional members.

  In the figure, the mobile phone T includes an antenna 11, a radio unit 12, a signal processing unit 13, a control unit 14, a voice synthesis processing unit 15, a speaker 16, a voice synthesis processing unit 17, a microphone 18, The display control unit 19, the display unit D 1, the display control unit 20, the display unit D 2, the image recording memory 21, the ROM 22, the camera module S that is an imaging unit, and the operation unit P are configured. Yes.

  The radio unit 12 modulates and demodulates a mobile phone radio signal exchanged with a base station (not shown). The signal processing unit 13 separates the signal demodulated by the radio unit 12 into a reception control signal and an audio signal, and outputs the reception control signal to the control unit 14 or processes the transmission signal from the control unit 14. The control unit 14 controls the operation of each unit of the mobile phone T by the control program data (program executable by the computer) for the entire mobile phone T stored in the ROM 22.

  The voice synthesis processing unit 15 synthesizes the voice signal from the control unit 14 and outputs the voice signal from the speaker 16. The voice synthesis processing unit 17 converts voice input from the microphone 18 into a voice signal and outputs the voice signal to the control unit 14. The operation unit P outputs an operation command signal to the control unit 14 using a key panel or the like.

  The imaging unit S includes a lens group, an imaging device, and peripheral circuits thereof. The imaging signal photoelectrically converted by the imaging device is A / D converted into pixel data and output to the control unit 14. The control unit 14 performs predetermined image processing and compression processing on the pixel data after the A / D conversion, and stores the image data in the image recording memory 21 serving as a recording unit. The image recording memory 21 may be a flash memory built in and fixed to the mobile phone T or may be a removable memory that can be inserted and removed.

  The display control unit 19 converts the display signal from the control unit 14 into a signal that can be displayed on the display unit D1 and outputs the signal to the display unit D1, and the display unit D1 performs display according to the signal from the display control unit 19. The display control unit 20 converts the display signal from the control unit 14 into a signal that can be displayed on the display unit D2 and outputs the signal to the display unit D2, and the display unit D2 performs display according to the signal from the display control unit 20.

  As described with reference to FIG. 1, in this example, the display unit D <b> 2 disposed on the surface of the imaging device S on the opening side is configured by a display unit configured with organic EL elements. In addition, you may comprise the display part D1 with an organic EL element.

  Below, an organic EL element is demonstrated easily.

  FIG. 3 is a diagram in which a unit of a display unit composed of organic EL elements is extracted.

  In the figure, a display unit D2 configured by two-dimensionally arranging a plurality of organic EL elements is electrically connected to the display control unit 20 by a heat seal 31. For this connection, a flexible printed circuit board or the like may be used. An image or character can be displayed by controlling the light emission of each organic EL element by a signal based on the image signal from the display control unit 20, specifically, a scanning signal and a data signal. .

  FIG. 4 is a schematic diagram showing a cross section of a display unit composed of organic EL elements.

  As shown in the figure, the display unit composed of an organic EL element is obtained by laminating an anode layer 42, an organic layer 43, and a cathode layer 44 on a translucent substrate 41.

  The anode layer 42 is made of a conductive material having a work function of 4 eV (electron volt) or more and a transmittance of 40% or more, such as indium tin oxide (ITO), indium zinc oxide (IZO), gold, tin oxide, and zinc oxide. It is a layer in which a transparent electrode is formed.

  The organic layer 43 includes a single layer or a plurality of layers of an organic compound or complex including a light emitting layer, such as a hole transport layer in contact with the anode layer 42, a light emitting layer formed of a light emitting material, an electron transport layer in contact with the cathode layer 44, and the like. It will be. Further, a lithium fluoride layer, an inorganic metal salt layer, or a layer containing them may be formed at an arbitrary position.

  The cathode layer 44 is a layer on which a reflective electrode made of a metal material having a work function of less than 4 eV (electron volts) and a reflectivity of 60% or more such as aluminum, sodium, lithium, magnesium, calcium, and silver is formed. .

  The substrate 41 is a substrate for a solid substrate such as glass or quartz, or polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyetherimide, polyetheretherketone as a substrate. , Flexible substrates such as polyphenylene sulfide, polyarylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC), and cellulose acetate propionate (CAP) are used.

  In addition, since the organic compound which comprises an organic EL element deteriorates with a water | moisture content or oxygen in air | atmosphere, it seals and is used from the outside atmosphere. This sealing member is omitted in FIG.

  FIG. 5 is an equivalent circuit diagram in which one pixel of the organic EL element constituting the display unit is extracted. In the figure, 50 is an organic EL element, 51 is a switching transistor, 52 is a driving transistor, 53 is a capacitor, 55 is a scanning line, 56 is a data line, and 57 is a power supply line.

  As shown in the figure, when a voltage is applied to the drain of the switching transistor 51 via the data line 56 and a voltage is applied to the gate of the switching transistor 51 via the scanning line 55, the switching transistor 51 is turned on, and the capacitor 53 In addition, a charge is accumulated in the gate and a voltage is applied to the gate of the drive transistor 52. As a result, the drive transistor 52 is turned on, and the organic EL element 50 is energized from the power supply line 57 according to the potential of the data line to emit light. Thereafter, even if the voltage application to the scanning line is cut off, the drive transistor 52 is kept on for a predetermined time and the organic EL element 50 continues to emit light due to the charge charged in the capacitor 53.

  The above is the sequence for causing one pixel of the organic EL element to emit light. The display unit for displaying information includes a plurality of such organic EL elements arranged two-dimensionally, and sequentially controls the voltage application of the data lines and the scanning lines as described above to the individual organic EL elements, whereby images and characters are displayed. Can be displayed. Although this example has been described with the active matrix system, the present invention can also be applied to a passive matrix system.

  Further, the amount of light emission, that is, the luminance is controlled by controlling the data line 56. For example, when light emission is to be performed with high luminance, the capacitor 53 is sufficiently charged, and both ends of the capacitor 53 are connected. The amount of light emission is increased by controlling the data line 56 so that the voltage is increased and the amount of current supplied to the organic EL element is increased.

  In addition, the voltage of the power supply line may be made variable so that the amount of current supplied to the organic EL element is increased.

  FIG. 6 is a diagram illustrating an example of a color arrangement pattern of organic EL elements arranged two-dimensionally. G (green), B (blue), and R (red) arranged in a matrix as shown in FIG. 6A, and a staggered arrangement as shown in FIG. Used.

  The present invention uses a display unit composed of the organic EL elements as described above, and when performing normal display, displays information by color images or characters in three colors of R, G, and B, and When shooting a subject, the chromaticity diagram, for example, the CIE 1931 chromaticity coordinate has an x value in the range of 0.2 to 0.45 and a y value in the range of 0.2 to 0.42, that is, white. While controlling the light emission amounts of the three colors, the light emission amount is increased and used as an illumination light source. Hereinafter, the case of using white as an illumination light source by increasing the light emission amount will be referred to as an illumination mode.

  Below, the operation | movement outline at the time of imaging | photography using the imaging part of the portable terminal which has a display part comprised with the above organic EL elements is demonstrated.

  FIG. 7 is a flowchart illustrating an example of an outline of the operation when the photographing mode using the imaging unit is set among various functions of the mobile terminal.

  In the flowchart, first, it is determined whether or not the shooting mode is set (step S101), and when it is determined that the shooting mode is set (step S101; Yes), the imaging device is turned on, and the imaging unit (camera module) is connected. A subject image being captured by the imaging unit, that is, a preview image (also referred to as a through image) is displayed on the display unit (corresponding to the display unit D1 in the case of the mobile phone shown in FIG. 1) arranged on the opposite surface. (Step S102). This preview image is used for monitoring the subject and is a substitute for the finder function.

  Thereafter, it is determined again whether or not it is a shooting mode (step S103). If the shooting mode is canceled (step S103; No), the process returns to step S101, and if it is a shooting mode (step S103; Yes), the release function is activated. It waits for the assigned button (for example, any of the operation buttons P shown in FIG. 1) to be turned on (step S104). When the button to which the release function is added is turned on (step S104; Yes), it is determined whether the subject brightness is equal to or lower than a predetermined brightness value from the relationship between the accumulation time of the image sensor and the gain at the time of obtaining the preview image (step S105). ).

When the subject luminance is equal to or lower than the predetermined luminance value (step S105; Yes), the display unit (corresponding to the display unit D2 in the case of the mobile phone shown in FIG. 1) arranged on the surface on the imaging unit side is displayed in the illumination mode. Driving is performed to emit light, and the exposure time (charge accumulation time) at the time of photographing is determined from the relationship between the accumulation time and the gain at this time (step S106). The light emission luminance in this illumination mode is preferably 1000 cd / m ² or more.

  Thereafter, the charge of the image sensor is cleared, and charge accumulation for photographing is started (step S107). When the exposure time (charge accumulation time) determined in step S106 is reached, charge accumulation is stopped (step S108), and illumination mode driving of the display unit arranged on the surface on the imaging unit side is stopped (step S109).

  On the other hand, if the subject brightness exceeds a predetermined brightness value in step S105 (step S105; No), the exposure time (charge storage time) at the time of shooting is determined from the relationship between the storage time of the image sensor at the time of preview and the gain ( Step S110) After clearing the charge of the image sensor, charge accumulation for photographing is started (Step S111). When the exposure time (charge accumulation time) determined in step S110 is reached, charge accumulation is stopped (step S112).

  That is, when the subject brightness is equal to or lower than the predetermined brightness value, the display unit disposed on the surface on the imaging unit side is driven in the illumination mode as an illumination light source to emit light for photographing, and the subject brightness is set to a predetermined value. When the luminance value is exceeded, steady light imaging with ambient light is performed.

  Thereafter, the electric charge accumulated in the image sensor is read (step S120), and predetermined image processing is performed on the pixel data after A / D conversion to obtain image data, and then compression processing is performed (step S121). Next, the compressed image data is stored in an image recording memory (see FIG. 2).

  This completes the shooting of one image, and the process returns to step S101.

  If it is determined in step S101 that the shooting mode has been released (step S101; No), the shooting mode is terminated (step S130), and a transition is made to another mode.

  Thus, by using the display unit arranged on the surface of the imaging unit on the opening side as an illumination light source, an independent drive circuit and a new space are not required, and a small and thin shape is maintained. A portable terminal capable of photographing under low luminance can be obtained. Further, when this display unit is used for illumination, unnecessary consumption of the power source can be suppressed by taking a subject image to be recorded in the recording unit. Although this example has been described with still image shooting, it can also be applied to moving image shooting.

  FIG. 8 is a flowchart illustrating another example of an outline of the operation when the photographing mode using the imaging unit is set among various functions of the mobile terminal. In the flow shown in the figure, the same parts as those in FIG. 7 are denoted by the same reference numerals, description thereof is omitted, and different parts will be described.

  In the flowchart, it is first determined whether or not the shooting mode has been set (step S201). If it is determined that the shooting mode has been set (step S201; Yes), the imaging device is turned on and the imaging unit (camera module) is set. The subject image being picked up by the image pickup unit, that is, the preview image, is displayed on the display unit (in the case of the mobile phone shown in FIG. 1, the display unit D1 is equivalent) arranged on the opposite surface (step S202).

Next, it is determined whether the subject luminance is equal to or lower than a predetermined luminance value from the relationship between the accumulation time of the image sensor at the time of obtaining the preview image and the gain (step S203). When the subject luminance is equal to or lower than the predetermined luminance value (step S203; Yes), the display unit (corresponding to the display unit D2 in the case of the mobile phone shown in FIG. 1) disposed on the surface on the imaging unit side is illuminated with a small amount of light. Drive in the mode to emit light (step S204). The light emission luminance in the small light quantity illumination mode is preferably about 500 cd / m ² .

  On the other hand, when the subject brightness exceeds the predetermined brightness value (step S203; Yes), the process jumps to step S204.

  After that, it is determined again whether or not the shooting mode is set (step S205). If the shooting mode is canceled (step S205; No), the process returns to step S201. If the shooting mode is set (step S205; Yes), the release function is activated. It waits for the assigned button (for example, any of the operation buttons P shown in FIG. 1) to be turned on (step S206). When the button to which the release function is added is turned on (step S206; Yes), it is determined again whether the subject brightness is equal to or less than a predetermined brightness value from the relationship between the accumulation time of the image sensor and the gain when the preview image is acquired (step S206). S207).

When the subject luminance is equal to or lower than the predetermined luminance value (step S207; Yes), the display unit (corresponding to the display unit D2 in the case of the mobile phone shown in FIG. 1) arranged on the surface on the imaging unit side is displayed with a large amount of light. Drive in illumination mode to emit light and determine exposure time. The light emission luminance in the large light amount illumination mode is preferably 1000 cd / m ² or more.

  Thereafter, the operations are the same as steps S107 to S109 and steps S120 to S122 described in FIG. Further, when the subject luminance exceeds a predetermined luminance value (step S207; No), the operation is the same as that in steps S110 to S112 described in FIG.

  In this way, the display unit arranged on the surface of the imaging unit on the opening side is used as a light source for illumination, and is illuminated with a small amount of light when displaying a preview image, and illuminated with a large amount of light when shooting. Thus, in addition to the above-described effects, it is possible to provide a portable terminal that can easily monitor a subject before photographing while suppressing power consumption. This example has been described with still image shooting as well, but can also be applied to moving image shooting. In addition, the description has been made with illumination with a small amount of light when displaying a preview image, and illumination with a large amount of light when shooting. However, even if the illumination with the same amount of light is used when displaying a preview image and when shooting, it deviates from the present invention. is not.

  FIG. 9 is a schematic diagram illustrating a cross section of the periphery of the display unit disposed on the surface of the imaging unit on the opening side. In the figure, 61 is a casing (corresponding to the upper casing in the case of the portable terminal shown in FIG. 1), S is an imaging device as an imaging unit, and 64 is a display unit that displays information composed of organic EL elements. is there.

  FIG. 6A shows a microlens array 63 arranged on the surface of the display unit 64 on the light emitting unit side corresponding to each pixel. The microlens array 63 may be formed by molding using a mold, or may be formed using a heat melting method or the like. In the drawing, the microlens array 63 is disposed inside the translucent dustproof plate 62, but the dustproof plate may be eliminated and the microlens array 63 may be disposed in the housing 61.

  FIG. 6B shows a case where a convex lens 65 is arranged on the light emitting portion side surface of the display portion 64. The convex lens 65 is preferably formed by molding with a mold.

  FIG. 4C shows a display unit 64 in which a Fresnel lens 66 is arranged on the light emitting unit side surface. The Fresnel lens 66 is formed by a mold.

  By doing in this way, the viewing angle of the display part comprised by the organic EL element can be made into a narrow angle, and the display part is made into the light source for illumination by making it an angle close | similar to the angle of view of the imaging device S desirably. The illumination light can be efficiently gathered on the subject side when used as an object. Further, when the microlens array is used and when the Fresnel lens is used, the illumination light can be efficiently collected on the subject side while being thinner.

  FIG. 10 is an external view of another example of a mobile phone which is an example of a mobile terminal according to the present invention. A cellular phone Q shown in the figure has an imaging device S as an imaging unit and a single display unit D3. The imaging device S is arranged so as to photograph the surface direction of the paper. The display unit D3 displays information composed of organic EL elements, and when shooting using the imaging device S, the display unit D3 is controlled in the illumination mode, as described above, for illumination. It is used as a light source. In the case of such an arrangement, it is preferable to arrange a reflection finder 67 formed on a convex mirror.

  As described above, the display unit configured to display information including the organic EL element, the imaging unit that captures the subject image, and the recording unit that records the subject image, and the display unit during operation of the imaging unit. By using as a light source for illumination, it is possible to obtain a small and thin portable terminal capable of photographing under low luminance without requiring an illumination member, a drive circuit and a new space.

  In addition, when using the display part which performs the information display comprised with the organic EL element as an illumination light source, you may use the display part whole surface for illumination, but only a predetermined part area | region is used for illumination. Of course, it may be used as.

1 is an external view of a mobile phone T that is an example of a mobile terminal according to the present invention. FIG. It is a block diagram which shows the example of a schematic internal structure of the portable terminal shown in FIG. It is the figure which extracted the unit of the display part comprised with the organic EL element. It is a schematic diagram which shows the cross section of the display part comprised with the organic EL element. It is the equivalent circuit diagram which extracted one pixel of the organic EL element which comprises a display part. It is a figure which shows the example of the color arrangement pattern of the organic EL element arrange | positioned two-dimensionally. It is a flowchart which shows the example of an operation | movement outline when it sets to the imaging | photography mode which uses an imaging part among the various functions of a portable terminal. It is a flowchart which shows the other example of the operation | movement outline when it sets to the imaging | photography mode which uses an imaging part among the various functions of a portable terminal. It is a schematic diagram which shows the cross section of the display part periphery arrange | positioned at the surface by the side of the opening part of an imaging part. It is an external view of the other example of the mobile telephone which is an example of the portable terminal which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper housing | casing 2 Lower housing | casing 3 Hinge 11 Antenna 12 Radio | wireless part 13 Signal processing part 14 Control part 15 Speech synthesis processing part 16 Speaker 17 Speech synthesis processing part 18 Microphone 19 Display control part 20 Display control part 21 Image recording memory 22 ROM
D1 display unit D2 display unit S imaging device T mobile phone

Claims (7)

An imaging unit for capturing a subject image;
A portable terminal comprising: an organic EL element having an information display function and an illumination function at the time of photographing by the imaging unit. A recording unit that records the subject image obtained by the imaging unit;
The portable terminal according to claim 1, wherein the display unit is used as a light source for illumination when a subject image to be recorded in the recording unit is captured. A recording unit that records the subject image obtained by the imaging unit;
The portable terminal according to claim 1, wherein the display unit is used as a light source for illumination when a preview image is displayed and when a subject image recorded in the recording unit is captured. The mobile terminal according to claim 3, wherein brightness when the display unit is used as an illumination light source is higher when an image to be recorded in the recording unit is captured than when a preview image is displayed. 2. The portable terminal includes a plurality of display units for displaying information, and a display unit including at least one organic EL element is disposed on a surface of the imaging unit on the opening side. The portable terminal of any one of -4. An optical member is arranged on the front surface of the display unit made of the organic EL element arranged on the opening side surface of the image pickup unit, and the viewing angle is narrower than that of the other display unit by the optical member. The mobile terminal according to claim 5, wherein The mobile terminal according to claim 6, wherein the optical member is an optical member formed in a Fresnel lens shape or a microlens array shape.

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