JP2006280011A - Portable apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a portable apparatus including a display device that makes display with high luminance and in low power consumption. <P>SOLUTION: An LED display panel 9 is provided in a display window formed on a surface of a case storing electronic parts. In the LED display panel 9, a plurality of light emitting diodes 8 are arranged in matrix. A display control apparatus performs display control of the light emitting diodes 8 of the LED display panel 9. Thus, a matrix arrangement of the light emitting diodes 8 provided in the portable apparatus makes display with high luminance and low power consumption. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable device such as a cellular phone provided with a display device, and more particularly to a portable device that reduces power consumption of the display device and improves luminance when the display device is turned on.

  2. Description of the Related Art Conventionally, there is a mobile phone described in Patent Document 1 as a mobile phone provided with a display device for notifying incoming information. This cellular phone is a two-fold type cellular phone, in which a character display unit is provided as an incoming call information display unit on the back surface of a display-side casing provided with a main display unit. When there is an incoming call, the LED symbol (light emitting diode) as a backlight provided inside the phone symbol is lit to emit light to notify the incoming call.

  In this prior art, the light emission of the light emitting diode is used as a backlight, and it is necessary for the user to shine the character display portion with high brightness in order to confirm the incoming call at a remote location. It was necessary to pass a high current through. That is, this conventional technique has a problem that a large amount of power is required even if the character display unit cannot be illuminated with high brightness or even if it can be illuminated with high brightness.

  Another conventional technique is disclosed in Patent Document 2. This prior art is a two-fold type mobile phone, in which a display means including a liquid crystal display device or the like is provided as an auxiliary display section on the back surface of a display-side casing provided with a main display section. The display means digitally displays a numerical value of the call time and displays an hourglass in an analog manner.

  However, this conventional device also uses a light emitting diode as a backlight, and the transmittance of the liquid crystal display device is as low as 10% or less, so that it cannot be displayed with high brightness as in the above-described conventional technology. Even if it is possible to display with high brightness, there is a problem that a large amount of power consumption is required.

JP 2002-51135 A JP 2001-136247 A

  An object of the present invention is to obtain a portable device having a display device capable of high-luminance display with low power consumption.

  The display device of the portable device according to the present invention can display various displays such as characters and images with high luminance.

  A first portable device of the present invention is an LED that is arranged in a display window formed on the surface of a housing that houses electronic components, and a plurality of light emitting diodes (LEDs) that project toward the outside in a matrix arrangement on a plane. A display panel, a display control device for controlling display of the light emitting diodes of the LED display panel based on the input display data, a main control device for outputting the display data to be displayed on the LED display panel to the display control device, A camera that captures an image of a subject; a camera operation unit that performs an imaging operation of the camera; and a battery that supplies power to the LED display panel, the display control device, and the main control device. The light emitting diode is arranged so as to project light in the direction in which the camera is directed, and the display control device is used for shooting operation of the camera. Moving to control lighting of the light emitting diode.

  In addition, a second portable device of the present invention includes a hinge that connects one end of an operation-side housing having an operation unit and one end of a display-side housing having a main display portion so as to be openable and closable, An LED display panel in which a plurality of light emitting diodes (LEDs) arranged on a display window formed on the surface of the casing other than the surface on which the main display unit is provided and projecting toward the outside are arranged in a matrix on a plane, and an input A display control device for controlling the display of the light emitting diodes of the LED display panel based on the display data, a main control device for outputting the display data to be displayed on the LED display panel to the display control device, and a camera for imaging a subject A camera operation unit that performs imaging operation of the camera, and a battery that supplies power to the LED display panel, the display control device, and the main control device, and the LED display panel includes the camera The light emitting diode in the direction in which the camera is directed at the operation is disposed so as to throw light, the display control unit controls lighting of the light emitting diode in conjunction with the photographing operation of the camera.

  According to the first portable device of the present invention, a light-emitting diode arranged in a matrix enables a display with low power consumption and high luminance. Further, the LED display panel can be made to function as a flash in conjunction with the camera photographing operation.

  Further, according to the second portable device of the present invention, the light emitting diodes arranged in a matrix in the two-fold type portable device enable display with high power consumption with low power consumption. Further, the LED display panel can be made to function as a flash in conjunction with the camera photographing operation.

  FIG. 1 is a perspective view showing Embodiment 1 in which the present invention is applied to a two-fold type mobile phone, and FIG. 1 (a) is a front view of the two-fold type mobile phone in an opened state. FIG. 1 (b) is a perspective view seen from the back side.

  In the figure, reference numeral 1 denotes an operation side housing having an operation section in which a plurality of operation keys 2 are arranged, and one end side is connected to one end of the display side housing 4 by a hinge 3. On the other end side of the operation side housing 1, a microphone 5 used by the user for a call is provided. On the other hand, as shown in FIG. 1 (a), a main display section 6 for displaying characters and images is provided on the front side of the display side housing 4. The main display unit 6 is a liquid crystal display (LCD). A receiver 7 that outputs the voice of the other party is provided on the other end of the display-side housing 4. Further, as shown in FIG. 1B, an LED display panel 9 in which a plurality of light emitting diodes (LEDs) 8 are arranged in a matrix is provided on the back side of the display side housing 4. The LED display panel 9 is mounted on a display window formed on the back surface of the display-side housing 4 and has 153 light emitting diodes 8 arranged in n rows × m columns, 9 rows and 17 columns in the illustrated example. The light emitting diodes 8 are mounted at a pitch of 3.2 mm, and the size of the display portion of the LED display panel 9 is about 2.4 inches (53.9 mm × 28.3 mm). Therefore, the LED display panel 9 occupies substantially the entire area of the back surface of the display-side housing 4 and can display a high luminance on a relatively large screen.

  FIG. 2 shows a state in which the two-fold type mobile phone according to Embodiment 1 of the present invention is closed. In the figure, reference numeral 10 denotes a side key arranged on the side surface of the display side housing 4, which can be operated with the operation side housing 1 and the display side housing 4 closed. The side key 10 is a key for switching display contents of the LED display panel 9 and for turning on / off the display.

  Next, a circuit configuration of the two-fold type mobile phone according to Embodiment 1 of the present invention will be described.

  FIG. 3 is a block diagram of a two-fold type portable telephone according to the first embodiment. In the figure, reference numeral 11 denotes an antenna for wireless communication, which receives radio waves received from a call partner and inputs them to the wireless unit 12. The radio unit 12 amplifies and frequency-converts the input signal and inputs it to the baseband IC 13. A baseband IC 13 as a main control device controls the entire mobile phone and operates according to a program stored in the memory unit 14. The memory unit 14 stores various data and data to be processed by the baseband IC 13 in addition to a program for operating the baseband IC 13.

  When there is an incoming call, the baseband IC 13 sounds a speaker via the sound unit 15 to notify the user of the incoming call. And the receiver 7 is used to make a call. The user's voice is taken into the mobile phone through the microphone and transmitted via the acoustic unit 15, baseband IC 13, radio unit 12, and antenna 11.

  Reference numeral 17 denotes an operation unit including the operation keys 2 and the side keys 10. Reference numeral 18 denotes an RTC (real time clock), which outputs accurate time information. The power supply control unit 19 supplies the power generated by the battery 20 to each unit, and supplies the power input from the charging terminal 21 to the battery 20 to charge the battery 20. The battery 20 is housed in the operation side housing 1. Reference numeral 22 denotes an infrared communication means for performing short-range data communication, and reference numeral 23 denotes a camera (not shown in FIGS. 1 and 2) built in the mobile phone.

  An LED display panel 9 includes a control microcomputer 24, an X direction control driver 25, a Y direction control driver 26, and light emitting diodes 8 arranged in a matrix of 9 rows and 17 columns. The control microcomputer 24, the X direction control driver 25, and the Y direction control driver 26 function as a display control device that controls the display of the light emitting diode 8.

  The portable device according to the present invention has light emitting diodes 8 arranged in a matrix on the surface of a portable device casing, and can display a high luminance with low power consumption. FIG. 4 shows a display example in which an image is displayed on the LED display panel 9 according to the present invention. FIG. 4 (a) is an example in which a pattern such as a figure or a pattern is displayed. For example, it is displayed when a mobile phone receives a call or during a call. The pattern displayed on the LED display panel 9 can be scrolled in the horizontal direction and the vertical direction, the display can be blinked, or can be displayed with gradation. Therefore, since the display with high brightness and high impact can be performed, the user can notice the incoming call even when the mobile phone is received at a position away from the user.

  Such a display pattern is stored in the memory unit 14 of FIG. 3, and when the baseband IC 13 detects an incoming call, the display pattern data is read from the memory unit 14 and transferred to the control microcomputer 24. The control microcomputer 24 that has received the display pattern data drives the X direction control driver 25 and the Y direction control driver 26 based on the data, and displays patterns such as figures and patterns on the light emitting diodes 8 arranged in a matrix.

  The display pattern can be created by the user by key input using the operation key 2 and registered in the memory unit 14, or a display pattern received from the outside can be registered in the memory unit 14.

  FIG. 4B shows an example in which time is displayed on the LED display panel 9. In the figure, 22:35 is displayed. This display is, for example, displayed by operating the side key 10 when the user wants to know the current time.

  In FIG. 3, if the user presses the side key 10 of the operation unit 17, the baseband IC 13 detects the pressing of the side key 10. The baseband IC 13 reads the current time from the RTC 18 and converts this time data into display pattern data stored in the memory unit 14 in the baseband IC 13. The display pattern data converted by the baseband IC 13 is transferred to the control microcomputer 24. The control microcomputer 24 drives the X direction control driver 25 and the Y direction control driver 26 to display time on the light emitting diodes 8 arranged in a matrix. Display the pattern.

  Since the side key 10 can be operated with the two-fold type cellular phone closed, the user can immediately confirm the time when the user wants to know the current time.

  Next, FIG. 4C shows an example in which characters are displayed on the LED display panel 9. The illustrated example is an example in which “FIG.” Is displayed. As the characters to be displayed on the LED display panel 9, it is possible to register the character pattern input by the user with the operation key 2 in the memory unit 14, or register the character pattern received from the outside in the memory unit 14. You can also.

  That is, when the user operates the operation key 2 or the side key 10 of the operation unit 17, the baseband IC 13 detects this and reads a character pattern corresponding to the key operation from the memory unit 14. The read character pattern is transferred to the control microcomputer 24. The control microcomputer 24 drives the X direction control driver 25 and the Y direction control driver 26 to display the character pattern on the light emitting diodes 8 arranged in a matrix. .

  Here, the present invention is characterized in that a display with high luminance is achieved with low power consumption, and is generally compared with the power consumption and luminance of a liquid crystal display device (LCD) conventionally used. To do.

First, in the case of the LED display panel of the present invention, when the light emitting diodes are arranged in a matrix of 9 rows and 17 columns at a pitch of 3.2 mm, the size is about 2.4 inches (53.9 mm × 28.3 mm). The luminance is about 400 cd / m ² , and power consumption at that time is sequentially scanned and turned on. Therefore, when a current of 20 mA is passed through one light emitting diode, 20 mA × 9 lamps gives 180 mA. Furthermore, since the control unit consumes about 10 mA of power, a total of about 190 mA is consumed.

On the other hand, the brightness of the LCD is generally 200 cd / m ² , but when trying to obtain a brightness of 400 cd / m ² on a 2.4-inch screen, a current of 60 mA is passed through four light emitting diodes used as a backlight. There is a need. Since the consumption current of the LCD main body is 10 mA, the total is 4 lamps × 60 mA + 10 mA, and 250 mA is the power consumption.

  That is, when the display by the LED display panel 9 of the present invention is compared with the display of the LCD, it can be said that the LED display panel 9 is excellent in luminance, power consumption, and visibility from a distance, although the resolution is inferior.

  As described above, according to Embodiment 1 of the present invention, a display device with low power consumption and high luminance can be obtained.

  Further, since the battery 20 having a relatively heavy weight is accommodated in the operation-side casing 1 and the LED display panel 9 is provided in the display-side casing 4, the LED display panel 9 is placed in the same operation-side casing 1 as the battery 20. Compared with the case where it is provided, the weight balance is improved and the operability is improved.

  Further, since the time display pattern and the character pattern can be displayed on the LED display panel 9 by operating the side key 10, the display is easily performed with the operation side casing 1 and the display side casing 4 being closed. Can be made.

  Next, a second embodiment of the present invention will be described.

  FIG. 5 is a perspective view showing Embodiment 2 in which the present invention is applied to a two-fold type mobile phone. In the second embodiment, the operation side casing 1 and the display side casing 4 can be opened and closed by the hinge 3, and the display side casing 4 is perpendicular to the axis of the hinge 3 by the rotation shaft 27. Is configured to be rotatable around the axis.

  FIG. 5B shows a normal state, and the main display unit 6 faces the operation side case 1 when the operation side case 1 and the display side case 4 are closed. In this normal state, the user can operate the operation key 2 while looking at the main display section.

  FIG. 5A shows a state in which the display-side housing 4 is rotated by 90 ° about the rotation shaft 27.

  FIG. 5 (c) shows a state in which the display-side housing 4 is further rotated and rotated 180 °. In this state, the user can operate the operation key 2 while looking at the LED display panel 9.

  Therefore, in the second embodiment, the operation key 2 can be operated while viewing the display on the LED display panel 9.

  Next, a third embodiment of the present invention will be described.

  FIG. 6 is a perspective view showing Embodiment 3 in which the present invention is applied to a camera-equipped mobile phone. In FIG. 6, a camera 23 is provided on the back side of the display-side housing 4. The camera 23 is arranged in the direction in which the light emitting diode 8 projects light. Further, an optical sensor 29 that detects ambient brightness is provided in the vicinity of the camera 23.

  In the third embodiment, the light emitting diode 8 of the LED display panel 9 is used as a flash when the camera 23 is photographed. That is, the light emitting diode 8 is caused to emit light in conjunction with an operation of a shutter button (not shown) of the camera 23. The light emitting diodes 8 are arranged in a matrix of 9 rows and 17 columns, and nine light emitting diodes 8 emit light simultaneously at the maximum.

  In general, when the light emitting diode 8 is used as a flash, it emits white light. However, by emitting light of another light emission color, for example, red, blue, etc., it is possible to enjoy photographing different from the natural color according to the user's preference.

  In addition, when the LED display panel 9 is used as a flash, a maximum of nine light emitting diodes 8 can be turned on in the third embodiment, but when the surrounding brightness is bright, the light emitting diodes 8 to be turned on are turned on. The number may be limited. As a means for limiting the number of light-emitting diodes 8 to be lit, the user may set and input the number of light-emitting diodes 8 by operating the operation keys 2, and the detection output of the optical sensor 29 for detecting ambient brightness. The baseband IC 13 may automatically set based on the above.

  Next, a fourth embodiment of the present invention will be described.

  FIG. 7 is a perspective view showing Embodiment 4 in which the LED display panel can be replaced. In FIG. 7, reference numerals 91 and 92 denote LED display panels, which can be attached to and detached from the display window 30 provided on the back side of the display side housing 4. The LED display panels 91 and 92 are electrically connected to the mobile phone body via the connection connector 31 by being attached to the display window 30.

  That is, the LED display panels 91 and 92 are, for example, LED display panels in which light emitting diodes 8 having different emission colors are arranged in a matrix. For example, one LED display panel 91 emits monochromatic light in a matrix arrangement. The other LED display panel 91 emits another monochromatic light emitting diode 8 or the light emitting diodes 8 emitting two or more colors are arranged in a matrix.

  Therefore, the user can enjoy the display by wearing the favorite LED display panels 91 and 92. In the fourth embodiment, since the LED display panels 91 and 92 are detachably attached to the display window 30, they can be easily replaced in the case of failure.

  Next, a fifth embodiment of the present invention will be described.

  FIG. 8 shows a structure in which a lattice plate matching the arrangement of the light emitting diode is provided on the light emitting diode of the LED display panel 9, and the lattice plate can be replaced with another lattice plate having a different lattice shape. It is a perspective view which shows the form 5. In FIG. 8, 32a and 32b are lattice plates in which lattice holes are formed in accordance with the arrangement of the light emitting diodes 8 arranged in a matrix, and are selectively attached to the display window 30. The lattice plate 32a has a circular lattice hole shape, and the lattice plate 32b has a rectangular lattice hole shape.

  Further, a diffusion sheet 33 that diffuses light is mounted on the lattice plates 32 a and 32 b incorporated in the display window 30, and a transparent window 34 is mounted on the display window on the diffusion sheet 33. Therefore, the light projected by the light emitting diode 8 is projected to the outside through the lattice holes of the lattice plate 32a or 32b, the diffusion sheet, and the window.

  In the fifth embodiment, since the lattice plates 32a and 32b having different lattice hole shapes can be appropriately replaced, the dot shape of the image displayed on the LED display panel 9 can be changed. The shape of the lattice holes is round and rectangular in this embodiment, but may be other shapes such as a star shape.

  Further, in the fifth embodiment, the diffusion sheet 33 is provided on the lattice plates 32a and 32b, and the light emitted from the light emitting diode 8 is diffused and then projected to the outside. The display is soft overall and smooth.

  Next, a sixth embodiment of the present invention will be described.

  FIG. 9 is a perspective view showing the sixth embodiment in which the window 34 can be replaced with another window 34 of a different color. In FIG. 9, the windows 34a and 34b are colored differently, and any one of the windows 34a and 34b is disposed on the diffusion sheet 33 and attached to the display window 30 as appropriate.

  Therefore, since the windows 34a and 34b can be replaced, even if the light emitting diode 8 is a single color light emitting element, it is possible to display different colors.

  Next, a seventh embodiment of the present invention will be described.

  FIG. 10 is a perspective view showing Embodiment 7 in which the diffusion sheet 33 can be replaced with another diffusion sheet 33 of a different color. In FIG. 10, the diffusion sheets 33a and 33b are colored differently, and one of the diffusion sheets 34a and 34b is appropriately disposed on the lattice plate 32 and attached to the display window 30.

  Therefore, similarly to the sixth embodiment, the diffusion sheets 33a and 33b can be replaced. Therefore, even if the light emitting diode 8 is a single color light emitting element, it is possible to display different colors and transmit the light. By replacing the diffusion sheets 33a and 33b having different sizes, the light-emitting diode 8 can be dimly lit or clearly lit.

  Although the embodiments of the present invention have been described above, the mobile device of the present invention can be used in various forms of utilization by utilizing low power consumption and high luminance display.

  FIG. 11 shows an example thereof, in which a time pattern is displayed on the LED display panel 9 of the mobile phone mounted on the charging holder.

  In FIG. 11, reference numeral 35 denotes a charging holder for charging the battery 20 of the mobile phone, to which a connection cord 36 for connecting to an external power source is connected. The mobile phone mounted on the charging holder 35 displays a time pattern on the LED display panel 9.

  That is, in FIG. 3, the user sets in advance a setting for displaying a clock during charging by operating the operation key 2 of the operation unit 17. This setting is stored in the memory unit 14 by the baseband IC 13.

  When a mobile phone is mounted on the charging holder 35 and external power is supplied to the charging terminal 21, the power supply control unit 19 detects this and starts charging the battery 20 and charging the baseband IC 13. Notify that there is.

  When the baseband IC 13 knows that the setting during charging is a setting for displaying the time pattern on the LED display panel 9 by referring to the memory unit 14, the baseband IC 13 reads the current time data from the RTC 18.

  The read time data is converted into display pattern data stored in the memory unit 14 in the baseband IC 13 and transferred to the control microcomputer 24 that controls the LED display panel 9. The control microcomputer 24 that has received the display pattern data causes the LED display panel 9 to turn on the clock display pattern via the X direction control driver 25 and the Y direction control driver 26. The baseband IC 13 reads the current time data from the RTC 106 at regular intervals and updates the time display on the LED display panel 9.

  In this usage example, the time display is performed on the LED display panel 9 when the mobile phone is mounted on the charging holder 35. However, other displays such as character display may be performed.

  Next, FIG. 12 shows another usage example, and is a diagram showing a usage example in which compatibility fortune-telling is performed using two mobile phones.

  FIG. 12 shows the back side of the display-side housings 4a and 4b of two mobile phones, and 8a and 8b are light-emitting diodes arranged in a matrix and 9a and 9b LED display panels. As an example of this use, each mobile phone is provided with infrared communication means 22a and 22b as short distance data communication means.

  The operation will be described below with reference to FIG.

  That is, the two mobile phones are set to the compatibility fortune-telling mode by the respective users operating the operation keys 2. When the baseband IC 13 of each mobile phone recognizes the compatibility fortune-telling mode, the baseband IC 13 activates the compatibility fortune-telling program stored in the memory unit 14. After that, when the two mobile phones are brought close to a distance where infrared communication is possible and each user operates the communication start key, the baseband IC 13 transmits information such as the date of birth and blood type stored in the memory unit 14 by infrared communication. It transmits to the other party's mobile phone via the means 22a. Similarly, the counterpart mobile phone device that has received the data via the infrared communication means 22b returns information such as the date of birth and blood type stored in the memory unit 14 via the infrared communication means 22b.

  The baseband ICs 13 in the two mobile phones compare the information of the other party with their own information, calculate the compatibility according to the program stored in the memory unit 14, and transfer the display pattern data as a result to the control microcomputer 24 To do. The control microcomputer 24 that has received the display pattern data causes the LED display panels 9a and 9b to display the display pattern via the X direction control driver 25 and the Y direction control driver 26. In the display example of FIG. 12, the two LED display panels 9a and 9b are combined to display one heart mark to indicate the degree of compatibility. However, other marks, figures, characters and the like may be used. In addition, the two LED display panels 9a and 9b can be blinked in synchronization.

  Moreover, FIG. 13 is a figure which shows the usage example as a crime prevention bell.

  When the user presses the emergency alert button by operating the key 17 due to an accident or the like, or when calling the police or the fire department, the baseband IC 13 performs a speaker via the sound unit 111 according to the program of the memory unit 14. The emergency buzzer sound is made to sound at 112 and the LED display panel 9 is turned on. Display pattern data of “SOS” as shown in FIG. 13 is stored in the memory unit 14, and the baseband IC 13 transfers the display pattern data to the control microcomputer 24. The control microcomputer 201 that has received the display pattern data causes the LED display panel 9 to light up the pattern at the time of the emergency alarm via the X direction control driver 25 and the Y direction control driver 26.

  Therefore, in this usage example, a high-luminance alarm display can be performed together with an alarm sound.

  The portable device according to the present invention can be used in the fields of portable wireless terminals such as cellular phones, portable information terminals and the like.

1 is a perspective view showing Embodiment 1 in which the present invention is applied to a two-fold type mobile phone. FIG. 3 is a perspective view showing a state in which the two-fold type mobile phone according to Embodiment 1 is closed. FIG. 2 is a block diagram of a two-fold type mobile phone according to the first embodiment. It is the figure which showed the example of a display which displayed the image on the LED display panel by this invention. It is a perspective view which shows Embodiment 2 which applied this invention to the two fold type | mold mobile phone. It is a perspective view which shows Embodiment 3 which applied this invention to the mobile telephone with a camera. It is a perspective view which shows Embodiment 4 which enabled replacement | exchange of the LED display panel. It is a perspective view which shows Embodiment 5 which provided the grid plate matched with arrangement | positioning of this light emitting diode on the light emitting diode of an LED display panel. It is a perspective view which shows Embodiment 6 which enabled exchange of the window to another window of a different color. It is a perspective view which shows Embodiment 7 which enabled exchange of the diffusion sheet to another diffusion sheet of a different color. It is a perspective view which shows the usage example made to display a time pattern on the LED display panel of the portable apparatus mounted in the charge holder. It is a figure which shows the usage example which performed compatibility fortune-telling using two mobile telephones. It is a figure which shows the usage example as a crime prevention bell.

Explanation of symbols

1 operation side housing, 3 hinge, 4 display side housing, 6 main display section, 8 light emitting diode, 9 LED display panel, 13 baseband IC, 17 operation section, 20 battery, 23 camera, 24 control microcomputer, 25 X direction control Driver, 26 Y direction control driver, 29 Optical sensor.

Claims (5)

An LED display panel in which a plurality of light emitting diodes (LEDs) arranged in a display window formed on the surface of a housing containing electronic components and projecting light toward the outside are arranged in a matrix on a plane;
A display control device for controlling the display of the light emitting diode of the LED display panel based on the input display data;
A main controller that outputs the display data to be displayed on the LED display panel to the display controller;
A camera that images the subject;
A camera operation unit for imaging the camera;
A battery for supplying power to the LED display panel, the display control device, and the main control device;
The LED display panel is arranged so that the light emitting diode projects in a direction in which the camera is directed when the camera is operated.
The portable display device, wherein the display control device controls lighting of the light emitting diode in conjunction with a photographing operation of the camera. A hinge for connecting the one end of the operation side housing having the operation portion and the one end of the display side housing having the main display portion so as to be opened and closed
A plurality of light emitting diodes (LEDs) arranged on a display window formed on the surface of the housing other than the surface on which the main display portion of the display-side housing is provided, and projecting toward the outside are arranged in a matrix on a plane. An LED display panel;
A display control device for controlling the display of the light emitting diode of the LED display panel based on the input display data;
A main controller that outputs the display data to be displayed on the LED display panel to the display controller;
A camera that images the subject;
A camera operation unit for imaging the camera;
A battery for supplying power to the LED display panel, the display control device, and the main control device;
The LED display panel is arranged so that the light emitting diode projects in a direction in which the camera is directed when the camera is operated.
The portable display device, wherein the display control device controls lighting of the light emitting diode in conjunction with a photographing operation of the camera.   3. The portable device according to claim 1, wherein the display control device controls display of the light emission color of the light emitting diode to white or another light emission color. 4.   3. The portable device according to claim 1, wherein the display control device controls lighting of a predetermined number of the light emitting diodes. 4. The portable device according to any one of claims 1 and 2, further comprising an optical sensor that detects ambient brightness,
The display control device controls lighting of a number of the light emitting diodes according to the brightness detected by the optical sensor.

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