Patent Abstract:
A compact and lightweight display device having an image pickup function and a two-way communication system which can shoot an image of a user as an object and display an image at the same time without degrading image quality by disposing a semi-transmitting mirror or the like which blocks an image on the display screen (display plane). The display device having the image pickup function includes a display panel capable of transmitting visible light at least and arranging display elements which can be controlled by voltage or current, and an image pickup device disposed around the display panel. The image pickup device is input with data of an image of a user or the like by a reflector, or equipped with a fiberscope bundling optical fibers.

Full Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a display device having an image pickup function which can display an image and shoot an image of an object at the same time. More particularly, the invention relates to a two-way communication system which can shoot an image of a user as an object while displaying an image of the other party. 
     2. Description of the Related Art 
     In recent years, with the advance in speed of telecommunication networks, what is called a two-way communication system such as a videophone system and a video conference has been developed, in which two parties can communicate while viewing an image of each other. 
     According to the two-way communication system, it is possible to shoot an image of an object (user, for example) and to display an image of the other party at the same time. 
     For example, an image-pickup display device having a special screen which turns to be transparent or opaque according to an incident angle of light, and an image pickup device and a projector display device each disposed in the rear of the screen is disclosed (see Patent Document 1 for example). According to such an image pickup display device, two parties can catch each other&#39;s eyes when their images are projected by the projector display device which is disposed in the opaque direction of the screen. 
     However, according to the Patent Document 1, it requires a special screen as well as an image pickup device and a projector display device, leading to a large and heavyweight device. Therefore, such a device cannot be applied to a portable electronic device. 
     In addition, an image pickup display device having multiple small semi-transmitting mirrors each slanted slightly is disclosed (see Patent Document 2 for example). Alternatively, an image pickup display device having multiple total reflection mirrors each slanted slightly in a spaced relationship so as to serve as semi-transmitting mirrors are disclosed (see Patent Document 3 for example). Such image pickup display devices are downsized by slantingly disposing semi-transmitting mirrors. 
     However, according to the image pickup display device in each of the above Patent Documents, semi-transmitting mirrors are disposed over an entire display screen (display plane) of the display device, and users look at the display screen (display plane) through the semi-transmitting mirrors. Therefore, quality of the display screen (display plane) which is viewed by a user is inevitably degraded. 
     [Patent Document 1] Japanese Patent Laid-Open No. Hei 6-030406 
     [Patent Document 2] Japanese Patent Laid-Open No. Hei 5-145912 
     [Patent Document 3] Japanese Patent Laid-Open No. Hei 5-292493 
     SUMMARY OF THE INVENTION 
     In view of the foregoing problems, the invention provides a compact and lightweight display device having an image pickup function and a two-way communication system which can shoot an image of an object (user, for example) and display an image at the same time without degrading image quality by disposing a semi-transmitting mirror or the like which blocks an image on the display screen (display plane). 
     In addition, the invention provides a compact and lightweight display device having an image pickup function and a two-way communication system which can display an image and shoot an image of a user as an object while securing an eye focus of the user who is viewing the displayed image. 
     The invention provides a display device having an image pickup function including a display panel capable of transmitting visible light at least and arranging display elements which can be controlled by voltage or current, and an image pickup device disposed around the display panel (upper side or lower side, or the like). The image pickup device according to the invention is input with data of an image of a user (hereinafter referred to as image data) or the like by a reflector, or equipped with a fiberscope bundling optical fibers. 
     It is also possible to input image data condensed by an optical system such as a lens to the image pick up device through reflection by a reflector. Alternatively, image data reflected by a reflector can be input to the image pickup device after being condensed by an optical system or the like. By disposing the reflector or the lens in this manner, the position of the image pickup device and in particular, a direction of the lens of the image pickup device can be controlled. 
     According to the invention, the image pickup device can be disposed around the display panel by using a reflector as well as an optical system typified by a lens. Therefore, further downsizing of the device can be achieved as compared to the structure in which the image pickup device is disposed in the rear (on the back) of the display panel. 
     As a reflector, a structure of forming a highly reflective film over a part of a substrate formed with depressions and projections in the display panel can be used. By forming such a reflector over the substrate of the display panel, the device can be further downsized. Note that the reflector may be a small mirror or a semi-transmitting mirror, and they may be single or multiple. 
     The lens may have a function to condense image data. For example, a microlens can be used. In addition, a light emitting element or a liquid crystal element can be used as a display element. 
     The display panel is constructed so as to display various images including a still image or a moving image by controlling the luminance of each pixel so that a user can view the images. 
     As an embodiment of the display panel, there is the one having light emitting elements whose emission such as luminance or lighting period can be controlled by voltage or current. It is more preferable that the pixel is formed by using a light-emitting element which includes a pair of light-transmitting electrodes and a light-emitting material sandwiched between them. The light emitting material is preferably the one which generates electroluminescence which allows other relevant materials to be sandwiched between the pair of the electrodes additionally. 
     The light emitted from the pixel includes light within the visible light spectrum. The display panel may be formed either by arranging pixels of the same emission color, or by arranging pixels of the specified emission color in the specified area, what is called an area color display panel. Further, it may be formed by arranging pixels of a plurality of different emission colors so as to perform a multi-color display as well. Alternatively, it may be formed by arranging pixels of white emission. It is also possible to form the display panel so that a user can recognize the emission of the pixels through a colored layer (color filter or a color conversion layer). 
     It is preferable that a laminate of the pair of the electrodes and the light-emitting material sandwiched between them as the components constituting the light-emitting element are formed by using light-transmitting materials or formed to be thin enough to maintain light transmissivity. A display panel which is fabricated by using a pair of light-transmitting electrodes in this manner and emits light from light emitting elements to the both screen sides is hereinafter referred to as a dual emission display panel. 
     For example, as a material to form the pair of the electrodes, a light-transmitting conductive film material including indium oxide, zinc oxide or tin oxide (ITO, ITSO, IZO or ZnO), aluminium including alkali metal or alkaline earth metal, silver, other metal materials or a metal material including alkali metal or alkaline earth metal is used. The pair of the electrodes are formed by using the above material. In the case of using a non light-transmitting material for the pair of the electrodes, they are preferably formed to be thin enough to transmit visible light (100 nm or less, or more preferably, 20 to 50 nm). 
     According to the invention, by forming one of the pair of electrodes constituting the light-emitting element by using a light-transmitting conductive film material and the other electrode by using the aforementioned metal material so as to control the film thickness of each electrode, the ratio of light emitted from each electrode to outside can be controlled to be different. That is, the electrode formed by using the light-transmitting conductive film material can emit light at a higher luminance than the other electrode formed by using the metal material. 
     According to another embodiment of the display panel, a display panel having liquid crystal elements (liquid crystal panel) whose molecular arrangement can be controlled by voltage can be provided, in which image display is controlled by light from a light source. 
     In addition, when using liquid crystal elements and using a non-light transmitting electrode, the display panel can have light transmissivity by forming an opening thereon. 
     According to the invention, the display device having an image pickup function can be fabricated in thinner size and lighter weight by forming light emitting elements or liquid crystal elements in the pixels over a flat substrate. 
     The image pickup device can shoot an image of an object through the display panel. That is, the image pickup device is disposed so as to shoot an image of the object by receiving the light that has passed through the display panel or through both the display panel and the substrate mounting the display panel. 
     The image pickup device has a solid-state image pickup element. Specifically, it is desirable that the image pickup device has a camera (image pickup device) including a light-receiving portion formed by using an optical sensor of a CCD (Charge Coupled Device) type or a CMOS (Complementary MOS) type. 
     By using the display device having an image pickup function of the invention, the two-way communication system can be provided that two parties can communicate with each other through wire transmission or radio transmission while viewing an image of each other on the display screen (display plane). In addition, according to the two-way communication system of the invention, at least one party is required to have the display device having an image pickup function which can shoot an image of himself as an object while displaying an image of the other party on the display panel. Similarly, in light of the other party, he can view an image of his interlocutor (user) on the display panel while shooting an image of himself 
     In addition, the display panel can display an image of the other party, an image of the user himself, text, figures, and graphic symbols. Furthermore, in two-way communication system by two people or more, an image of the user can be displayed on the display panel in addition to the image of the other side. 
     According to the invention, by forming a light-transmitting display panel, light from pixels is emitted not only to one screen side which is viewed by a user but also to the opposite screen side. In that case, it is concerned that unnecessary light for an object might be input to the image pickup device. Then, it is more preferable that the image pickup device is provided with a correction device in which a deviation in color or luminance of an image is corrected corresponding to the light transmissivity of the display panel, and a correction device in which the glare caused by light reflecting on the display panel is eliminated from an image. 
     According to the invention, by implementing a quite lightweight and thin display panel and an image pickup device, a compact and lightweight display device having an image pickup function can be provided. In particular, since the image pickup device can be disposed around the display panel by using a reflector as well as an optical system typified by a lens, further downsizing of the device can be achieved as compared to the structure in which the image pickup device is disposed in the rear of the display panel. 
     According to the structure of the invention, it is possible to shoot an image of an object (user, for example) and to display an image of the other party to be viewed by the user on a display screen (display plane) at the same time without disposing anything which interrupts the user&#39;s view between the display panel and the user. In addition, as an image displayed on the display panel, multi-window display for each image of the user and the other party can be performed. 
     Furthermore, it is also possible for a user to shoot an image of himself while seeing the displayed image of himself on the display panel. At this time, a high-quality image can be shot while securing an eye focus of the user even if he is viewing his own image. 
     In addition, when shooting an image of the other party and displaying the image on the display panel of the other party, each of the shooter and the other party can view the same image while shooting. At this time, the normal display is performed on the display panel of the shooter side while the inversion display is performed on the display panel of the other party. That is, the image is displayed in a mirror projection manner on the display panel of the other party. 
     According to the invention, a display device having an image pickup function and a two-way communication system is provided, in which image shooting and image display can be performed at the same time while securing an eye focus of the user who is viewing the displayed image. In particular, when two parties use the similar display devices having an image pickup function of the invention, they can communicate while catching each other&#39;s eyes. 
     The two-way communication system of the invention includes a display panel which can shoot an image as described above, in which it is possible to display an image of the user on the display panel in addition to an image of the other party while shooting an image of the user as an object. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A and 1B  each illustrates a portable phone of the invention. 
         FIGS. 1C and 1D  each illustrates an enlarged view of the portable phone of the invention. 
         FIG. 2A  illustrates a videophone system of the invention. 
         FIGS. 2B and 2C  each illustrates an enlarged view of the videophone system of the invention. 
         FIGS. 3A and 3B  each illustrates a videophone system of the invention. 
         FIGS. 4A to 4E  each illustrates a cross-sectional diagram of a dual emission display panel. 
         FIGS. 5A and 5B  each illustrates a cross-sectional diagram of a dual emission display panel. 
         FIG. 6A  illustrates image corrections of the invention. 
         FIG. 6B  illustrates a flow chart for image corrections of the invention. 
         FIG. 7  illustrates a graph of a simulation result. 
         FIG. 8A  illustrates a portable phone of the invention. 
         FIG. 8B  illustrates a configuration diagram of a controller. 
         FIGS. 9A and 9B  each illustrates a view of an electronic apparatus of the invention. 
         FIG. 10  illustrates a diagram of a portable phone of the invention. 
         FIG. 11A  illustrates a cross-sectional diagram of a liquid crystal panel of the invention. 
         FIGS. 11B and 11C  each illustrates a top plan view of the liquid crystal panel of the invention. 
         FIG. 12  illustrates a cross-sectional diagram of a liquid crystal display panel of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Embodiment modes of the invention are described below with reference to the accompanying drawings. Note that like components are denoted by identical numerals as of the first embodiment and will be explained in no more details 
     Embodiment Mode 1 
     Described in this embodiment mode is a portable phone having a dual emission display panel as an example of a display device having an image pickup function. Note that dual emission display panel herein defined is a display panel including a pair of light-transmitting electrodes, in which light from light emitting elements are emitted to both screen sides. It may simply be referred to as a dual emission panel. 
       FIG. 1A  illustrates an overall view of a portable phone.  FIG. 1B  illustrates a cross-sectional view of a dual emission panel corresponding to a display panel.  FIGS. 1C and 1D  each illustrates an enlarged view of a display panel. 
     The portable phone shown in  FIG. 1A  includes a dual emission display panel  100  and a first housing  101  surrounding and sandwiching an edge of the dual emission panel  100 . The first housing  101  includes an audio output portion  102 , an antenna  104  or the like. A second housing  105  including an audio input portion  106 , an operating key  107  or the like is connected to the first housing  101  with a hinge  108 . An image pickup device  110  corresponding to an image pickup device is disposed at the bottom of the dual emission panel  100 . 
     As shown in  FIG. 1B , the dual emission panel  100  includes first and second substrates  111  and  112  each having light transmissivity and an area having an EL layer (EL layer area)  113  sandwiched between them. Therefore, light is emitted in both directions of the substrates (as shown by arrows). 
     The first housing  101  can be formed thin since the dual emission panel  100  is quite thin. Therefore, in this embodiment mode, the image pickup device  110  is disposed not in the first housing  101 , but in the hinge  108  in a rotatable manner. At this time, a lens included in the image pickup device  110  is disposed so as to face either side of the dual emission panel  100 , the user side or the opposite side of the user. That is, the rotation angle of the image pickup device may be 180 to 250 degrees. 
     When carrying out two-way communication, the image pickup device  110  may be set so as to face the dual emission panel  100 . At this time, the lens of the image pickup device  110  cannot be recognized by a user. In addition, when shooting an image of the user as an object, the lens of the image pickup device  110  may be set to face the user side while it may be set to face the opposite side when shooting an image of people or things in the opposed side of the user. 
     Note that the image pickup device  110  may be set to face either the user side or the opposite side thereof even in carrying out two-way communication. In particular, when two-way communication is carried out with the image pickup device  110  facing the opposite side, a two-way communication can be carried out including a third party, in addition to the user and the other party, who is communicating directly with the user while viewing an image displayed on the dual emission panel. That means, by implementing the dual emission panel, two-way communication can be carried out including the third person while being recognized by the other two parties. 
     When the image pickup device  110  cannot be disposed in the first housing  101  owing to the thinner shape of the dual emission panel  100 , image data can be received by disposing the image pickup device  110  in the hinge  108  or in the second housing  105  as shown in this embodiment mode. 
     According to this embodiment mode, a thinner portable phone can be fabricated by disposing the image pickup device  110  not in the rear of the display panel  100 , but around the dual emission panel  100 , for example, at the bottom of the dual emission panel  100  as shown in  FIG. 1B . Specifically, the first housing  101  can be formed thin by using the dual emission panel  100  and disposing the image pickup device  110  in the hinge  108  or the second housing  105 . Image data from outside is input to the image pickup device  110  after being reflected by a reflector or the like. 
     Note that the dual emission panel  100  may be either an active matrix type or a passive matrix type. In the case of the passive matrix display panel, higher light transmissivity can be obtained as compared to the active matrix display panel. 
       FIGS. 1C and 1D  each illustrates an enlarged view of a dual emission panel with one mode of a specific reflector. Each of them shows a structure of the second substrate  112  formed with depressions and projections, on part of which a reflector is formed. Note that a region of the substrate for forming depressions and projections may correspond to a pixel portion at least. 
     Specific shapes of depressions and projections of the substrate are described now with reference to  FIG. 1C . In the cross-sectional diagram, a length of an area having depressions and projections is denoted by L while a width thereof is denoted by D. Only one side of the substrate is formed with depressions and projections while the other side thereof has a flat surface. Specifically, the opposite side of the EL layer of the substrate has depressions and projections while the side having the EL layer has a flat surface. This second substrate  112  is attached to the first substrate  111  as a sealing substrate. In addition, each of the depressions and projections alternately includes a surface a which is parallel to the flat surface and a surface b which makes an angle of 135 degrees with the surface a. The width D of the depressions and projections is smaller by degrees in a farther place from the image pickup device  110 , and the surfaces a and b are formed in stages. A reflector is formed over the surface b. This reflector may be formed of a metal film by vapor deposition or sputtering. 
     According to such a substrate having depressions and projections, image data is input to the image pickup device  110 , and the image displayed on the dual emission panel  100  can be recognized from either side of the first substrate  111  or the second substrate  112 . At this time, image data reflected by the reflector is input to the image pickup device  110  through the second substrate  112 . Specifically, the image data is input to the image pickup device  110  by the reflector formed on the surface b of the substrate having depressions and projections, and the image displayed on the dual emission panel  100  can be recognized from the second substrate  112  side as well through the light-transmitting surface a. 
     Note that although  FIG. 1C  shows an example in which image data is input to the image pickup  110  after being reflected by the reflector at an angle of approximately 90 degrees assuming that the surface a makes an angle of 135 degrees with the surface b, the invention is not limited to this. That is, an angle made by the surfaces a and b, an angle at which an object is reflected or the like can be set by taking account of the position of the image pickup device  110 , the state of an object, intensity of external light, material of the substrate or the like. 
       FIG. 1D  illustrates depressions and projections having a different structure from that in  FIG. 1C . In the cross-sectional diagram, a length of an area having depressions and projections is denoted by L while a width thereof is denoted by d. Only one side of the substrate is formed with depressions and projections while the other side thereof has a flat surface. Specifically, the opposite side of the EL layer of the substrate has depressions and projections while the side having the EL layer has a flat surface. This second substrate  112  is attached to the first substrate  111  as a sealing substrate. In addition, each of the depressions and projections alternately includes a surface c which is parallel to the flat surface, a surface d which makes an angle of 135 degrees with the surface c and a surface e which makes a right angle with the surface c. The width D of the area having depressions and projections is larger by degrees in a farther place from the image pickup device  110 . A reflector is formed over the surface d. This reflector may be formed of a metal film by vapor deposition or sputtering. 
     According to such a substrate having depressions and projections, image data is input to the image pickup device  110 , and the image displayed on the dual emission panel  100  can be recognized from either side of the first substrate  111  or the second substrate  112 . At this time, image data reflected by the reflector is input to the image pickup device  110  through something outside the second substrate  112 , for example through air. Specifically, the image data is input to the image pickup device  110  by the reflector formed on the surface d of the substrate having depressions and projections, and the image displayed on the dual emission panel  100  can be recognized from the second substrate  112  as well through the light-transmitting surface c. 
     Note that although  FIG. 1D  shows an example in which image data is input to the image pickup  110  after being reflected by the reflector at an angle of approximately 90 degrees assuming that the surface c makes an angle of 135 degrees with the surface d, the invention is not limited to this. That is, an angle made by the surfaces c and d, an angle at which an object is reflected or the like can be set by taking account of the position of the image pickup device  110 , the state of an object, intensity of external light, material of the substrate or the like. 
     Although the above description is the case of processing the second substrate  112 , the first substrate  111  may be processed alternatively. When using a dual emission panel in particular, a first image data from the first substrate  111  side and a second image data from the second substrate  112  side can be each input to the lens of the image pickup device  110  by processing both of the first and second substrates  111  and  112  as shown in  FIG. 10  so that each reflector on the first substrate  111  and the second substrate  112  is disposed alternately. As a reflector for this case, a half mirror coated with multiple dielectric thin film layers is preferably used. As a result, only a part of the first and second image data passes through the reflector whereas the rest is input to the image pickup device  110  after being reflected. 
     In addition, in  FIG. 10 , the second image data reflected on the first substrate  111  and the first image data reflected on the second substrate  112  are input to the image pickup device  110  through the substrate respectively. In this case, the shapes and positions between the first substrate  111  or the second substrate  112  and the image pickup device  110  may be designed by taking account of a refraction factor between air and the substrate. 
     Note that the dual emission panel includes an EL layer sandwiched between first and second electrodes (corresponding to a cathode and anode of a light emitting element) each having light transmissivity. Therefore, light is emitted to both screen sides of the panel. Thus, circular polarizing plates may be disposed appropriately so as to prevent diffusion of external light due to a highly reflective wiring such as a signal line or a scan line. 
     In addition, when performing a black display on the dual emission panel, a polarizing plate or a circular polarizing plate may be disposed outside of the first substrate  111  and the second substrate  112  (opposite side of an EL layer) as needed although a case where the display screen (display plane) is relatively dark as compared to the external light can be disregarded. For example, a pair of polarizing plates may be disposed in crossed nicols, or a circular polarizing plate including a ¼ lambda plate and a polarizing plate may be disposed in crossed nicols to enhance contrast. 
     Alternatively, a polarizing plate or a circular polarizing plate may be disposed inside the first substrate  111  and the second substrate  112  (the EL layer side). In this case, an opening is formed in the polarizing plate or the circular polarizing plate at the corresponding position to the reflector in order to obtain reflection by the reflector. 
     The pair of the polarizing plates may be disposed with their optical axes (absorption axes and transmission axes thereof) moved in some measure to come off crossed nicols so as to enhance contrast while securing enough light transmissivity. 
     Furthermore, it is also possible to apply an anti-glare treatment for reducing the glare (caused by light reflecting on the panel) by forming minute concavity and convexity on the surface of the panel to diffuse the reflected light or an anti-reflective coating using an anti-reflection film. In addition, a hard-coat treatment may be also applied against external shocks and scratches. 
     The dual emission panel according to this embodiment mode integrates a pixel portion having an EL layer, a signal line driver circuit portion and a scan line driver circuit portion as driver circuit portions. Note that the pixel portion and the driver circuit portions are not necessarily integrated. The signal line driver circuit portion and the scan line driver circuit portion may be formed by IC chips and connected to the pixel portion by bump bonding as well. In particular, the signal line driver circuit portion may be formed by an IC chip, and connected to a wiring through an ACF (Anisotropic Conductive Film) or an FPC (Flexible Printed Circuit) board, or by using COF (Chip On Film) or TAB (Tape Automated Bonding). 
     The signal line driver circuit portion and the scan line driver circuit portion are connected to external circuits through a connection terminal such as an ACF (Anisotropic Conductive Film) or an FPC (Flexible Printed Circuit) board, and signals are input therethrough. The external circuits include a power source circuit, a controller, an interface (I/F) portion or the like. 
     By implementing the quite lightweight and thin display panel and the image pickup device as described above, a small and compact portable phone having a shooting function can be provided. In addition, since there is no need to dispose anything which interrupts the user&#39;s view between the dual emission panel and the user, it is possible to shoot an image of a user as an object and to display an image to be viewed by the user on a display screen (display plane) at the same time. 
     As a reflector in this embodiment mode, multiple small mirrors may be disposed as well. 
     The portable phone in this embodiment mode can be applied to a two-way communication system which is used for two-way communication. When carrying out two-way communication, image display and image shooting can be performed at the same time while securing an eye focus of the user who is viewing the displayed image. 
     Note that the image pickup device  110  may be set to face either the user side or the opposite side thereof even in carrying out two-way communication. For example, when two-way communication is carried out with the image pickup device  110  facing the opposite side, two-way communication can be carried out including a third party, in addition to the user and the other party, who is directly communicating with the user while recognizing an image displayed on the dual emission panel. That means, by implementing the dual emission panel, two-way communication can be carried out including the third person while being recognized by other two parties. 
     Besides the two-way communication, a user can shoot an image of himself while seeing the displayed image of himself on the display panel. At this time, a high-quality image can be shot while securing an eye focus of the user even if he is viewing his own image. 
     Embodiment Mode 2 
     Described in this embodiment mode is a portable phone having a dual emission display panel as an example of a display device having an image pickup function, which has a different structure from that in Embodiment Mode 1. 
     As shown in  FIG. 8A , the first housing  101  in this embodiment mode includes a fiberscope  115  for image data input. That is, a lens (objective lens) of the fiberscope  115  is disposed in the rear (on the back) of the dual emission panel  100  in the first housing  101 . The fiberscope  115  is led out to the second housing  105  through the hinge  108  so as to be connected to the image pickup device  110 . Note that the image pickup device  110  may be disposed in the first housing  101  as well. That is, a fiberscope for transmitting an image to the image pickup device  110  through a lens may be used as shown in  FIG. 8A . In addition, the diameter, the number of lenses, or the position of the fiberscope  115  may be set appropriately. 
     The second housing  105  includes a wiring board such as a printed wiring board  150  mounted with the image pickup device  110 , a controller  151 , a power supply circuit  152 , an I/F (interface)  154  or the like. Various signals and power supply voltages supplied to the I/F  154  are supplied to the controller  151  and the power supply circuit  152 . 
       FIG. 8B  illustrates a configuration of the controller  151 . The controller  151  includes an A/D converter  155 , a PLL (Phase Locked Loop)  156 , a control signal generating circuit  157 , an SRAM 1  (Static Random Access Memory)  158  and an SRAM 2   159 , a control signal generating circuit  160  for the image pickup device  110  and an image processing circuit  153 . Although SRAMs are used in this embodiment mode, SDRAMs (Synchronous DRAMs) and DRAMs (Dynamic Random Access Memories) can be used instead if high-speed data writing or reading can be performed. 
     Video signals supplied through the I/F (interface)  154  are serial-to-parallel converted in the A/D converter  155 , and input to the control signal generating circuit  157  as video signals corresponding to each color of RGB. Based on the various signals supplied through the I/F  154 , Hsync signals, Vsync signals, clock signals (CLK) and alternating voltages (AC Cont) are generated in the A/D converter  155 , and then input to the control signal generating circuit  157 . 
     The PLL  156  has a function to adjust the frequency of various signals supplied through the interface  154  to match the operating frequency of the control signal generating circuit  157  in phase. Although the operating frequency of the control signal generating circuit  157  is not necessarily equal to the frequency of various signals supplied through the interface  154 , they are adjusted in the PLL  156  so as to be synchronized with each other. 
     The video signals input to the control signal generating circuit  157  are once written into the SRAM 1   158  and the SRAM 2   159  and stored therein. The control signal generating circuit  157  reads out video signals bit by bit which correspond to all the pixels among the signals for all bits stored in the SRAM 1   158  and the SRAM 2 , and then supplies them to a signal line driver circuit of the dual emission panel  100 . 
     In addition, the control signal generating circuit  157  supplies data for each bit regarding an emission period of a light emitting element to a scan line driver circuit of the dual emission panel  100 . 
     Image data from the fiberscope  115  is input to the image pickup device  110 , and then processed in the image processing circuit  153 . The signals processed in the image processing circuit  153  are input to the interface  154 , and then input to the image pickup device  110  through the control signal generating circuit  160  for the image pickup device  110 . 
     The power supply circuit  152  also supplies a predetermined power supply voltage to the signal line driver circuit, the scan line driver circuit and the pixel portion of the dual emission panel  100 . 
     According to this embodiment mode, the image pickup device can be disposed around the display panel (upper side, lower side or the like). Therefore, downsizing of the device can be achieved. 
     The portable phone in this embodiment mode can be applied to a two-way communication system. When carrying out two-way communication, image display and image shooting can be performed at the same time while securing an eye focus of a user who is viewing the displayed image. 
     Note that the image pickup device  110  may be set to face either the user side or the opposite side thereof even in carrying out two-way communication. For example, when two-way communication is carried out with the image pickup device  110  facing the opposite side, two-way communication can be carried out including a third party, in addition to the user and the other party, who is directly communicating with the user while recognizing an image displayed on the dual emission panel. That means, by implementing the dual emission panel, two-way communication can be carried out including the third person while being recognized by two other parties. 
     Besides the two-way communication, a user can shoot an image of himself while seeing the displayed image of himself on the display panel. At this time, a high-quality image can be shot while securing an eye focus of the user even if he is viewing his own image. 
     Embodiment Mode 3 
     Described in this embodiment mode is a videophone system having a dual emission display panel as an example of a display device having an image-pickup function. 
       FIG. 2A  illustrates an overall view of a videophone system which includes a display panel  207  having a first substrate  200 , a second substrate  201  and an EL layer area  202  sandwiched between them, and an image pickup device  203  disposed at the bottom of the display panel  207 . 
     When a user  205  faces the display panel  207  which displays an image of the other party  206 , they can communicate while catching each other&#39;s eyes. 
     In the image pickup device  203 , a microlens for condensing image data which is reflected by a reflector is disposed in conformity with the size of the display panel  207  as a lens of the image pickup device. 
       FIGS. 2B and 2C  each illustrates an enlarged view of the display panel  207 . Each figure shows a structure of the second substrate formed with depressions and projections as in  FIGS. 1C and 1D , on part of which a reflector is formed. Through the reflector, image data of the user  205  is input to the image pickup device. 
     As a reflector, multiple small mirrors or half mirrors may be disposed. 
     Since the image pickup device is not required to be disposed in the rear of the display panel  207  in the videophone system as described above, further downsizing can be achieved. 
       FIG. 3A  illustrates a videophone system having a different structure from that in  FIG. 2A , in which a lens  208  and a reflector  209  are disposed in the rear of the second substrate  201 . For example, a microlens may be used as the lens  208  while a mirror may be used as the reflector  209 . 
     Referring to a cross-sectional diagram of the videophone system shown in  FIG. 3B , the lens  208  condenses image data of a user and input it to the reflector  209 . The image data is then input to an image pickup device  210  from the reflector  209 . 
     At this time, the shooting range can be widened as compared to the sizes of the lens  208  and the reflector  209  by adjusting a focus of the lens  208 . Therefore, a size of the videophone system such as a depth in particular is not increased even when the lens  208  having a relatively small size compared to the display panel and the reflector  209  having about the same size as the lens  208  are disposed in the rear of the display panel. 
     By using an optical system for condensing image data of an object in this manner, downsizing of a videophone system is achieved. 
     By implementing the quite lightweight and thin display panel and the image pickup device as described above, a compact and lightweight portable videophone can be provided. In addition, since there is no need to dispose anything which interrupts the user&#39;s view between the dual emission panel and the user, it is possible to shoot an image of an object (user, for example) and to display an image to be viewed by the user on a display screen (display plane) at the same time. 
     The videophone in this embodiment mode can be applied to a two-way communication system which is used for two-way communication. When carrying out two-way communication, image display and image shooting can be performed at the same time while securing an eye focus of a user who is viewing the displayed image. 
     Embodiment Mode 4 
     Described in this embodiment mode is a method for fabricating a display device having an image pickup function, and in particular, a method for fabricating a substrate having depressions and projections. 
     As shown in  FIG. 4A , a metal mold  300  having depressions and projections is formed first. For example, when forming the substrate having depressions and projections as shown in  FIG. 1C , an angle of the projection is formed to have 135 degrees. An angle made by the projection with a surface having no depressions nor projections is denoted by atan (d/L). Alternatively, a metal mold having depressions and projections as shown in  FIG. 1D  may be prepared as well. An organic material may be poured into the metal mold  300  to form the second substrate having depressions and projections. In addition, the second substrate having depressions and projections may be formed by whittling away a substrate using the metal mold  300 . 
     In this manner, a second substrate  301  having depressions and projections as shown in  FIG. 4B  is formed. As the second substrate  301 , a glass substrate made of barium borosilicate glass or alumino borosilicate glass, a quartz substrate, an SUS substrate or the like may be used. Alternatively, a synthetic resin substrate having flexibility such as a plastic substrate typified by PET (Polyethylene Terephthalate), PES (Polyether Sulfone) or PEN (Polyethylene Naphthalate) and an acrylic substrate can be used as long as it can withstand the processing temperatures during the manufacturing steps although it generally has a lower heat resistance temperature as compared to other substrates. Note that in the case using a substrate formed of an organic material such as synthetic resin, the second substrate may be formed by pouring the material into the metal mold  300 . Meanwhile in the case of using a glass substrate, a quartz substrate, an SUS substrate or the like, the second substrate may be formed by whittling the substrate away using the metal mold  300 . 
     Subsequently, a mirror surface processing is applied by forming a metal film on the depressions and projections only in one direction as shown in  FIG. 4C . Specifically, the metal film is formed by applying vapor deposition or sputtering in one direction. At this time, an electric field may be applied in order to control the deposition direction of the metal film. 
     Then, a second substrate  301  is cut off as shown in  FIG. 4D  with respect to the surface having no depressions nor projections at an angle of atan (d/L). 
     The second substrate  301  formed like the above manner is used as a sealing substrate. That is, as shown in an enlarged cross-sectional diagram of a pixel in  FIG. 4E , the second substrate  301  having depressions and projections is attached onto the pixel portion  306  by a sealant. The pixel portion  306  includes a switching transistor  304  and a driving transistor  305  formed on the first substrate  303 , a first electrode  307  of a light emitting element connected to a first electrode of the driving transistor  305 , an EL layer  308  formed over the first electrode  307 , a second electrode  309  of the light emitting element formed over the EL layer  308  and a protective film  310  formed over the second electrode  309 . 
     The image data is input to the image-pickup device  311  after being reflected by a reflector  302  disposed on the second substrate. Note that since image data is input from a light emitting area as well, image corrections as described in Embodiment Mode 6 are preferably performed. In addition, the size of the depressions and projections of the second substrate in actuality is quite large relatively to the size of one pixel. 
     Described now is the EL layer  308 . In the EL layer  308 , an HIL (Hole Injection Layer), an HTL (Hole Transporting Layer), an EML (EMmitting Layer), an ETL (Electron Transporting layer) and fan EIL (Electron Injection Layer) are laminated in this order from the anode side. Typically, CuPc is used for the HIL, a-NPD is used for the HTL, BCP is used for the ETL and BCP:Li is used for the EIL. 
     In addition, in the case of performing a full color display, materials each emitting red (R), green (G) or blue (B) light may be selectively deposited as the EL layer  308  by vapor deposition using a deposition mask or by ink-jet printing. Specifically, CuPc or PEDOT is used for the HIL, a-NPD is used for the HTL, BCP or Alq 3  is used for the ETL and BCP:Li or CaF 2  is used for the EIL. As for the EML, for example, Alq 3  doped with dopant corresponding to each emission color of RGB (DCM and the like for R, and DMQD and the like for G) may be used. Note that the invention is not limited to the laminate structure of the aforementioned EL layer  308 . 
     The specific laminate structure of the EL layer  308  is described now. In the case of forming the EL layer  308  for red emission for example, CuPc having a thickness of 30 nm and a-NPD having a thickness of 60 nm are sequentially deposited. Then, by using the same mask, Alq 3  having a thickness of 40 nm which is doped with DCM 2  and rubrene as a red EML, BCP having a thickness of 40 nm as an ETL and BCP having a thickness of 1 nm which is doped with Li as an EIL are sequentially deposited. In the case of forming the EL layer  308  for green emission for example, CuPc having a thickness of 30 nm and a-NPD having a thickness of 60 nm are sequentially deposited. Then, by using the same mask, Alq 3  having a thickness of 40 nm which is doped with coumarin  545 T as a green EML, BCP having a thickness of 40 nm as an ETL and BCP having a thickness of 1 nm which is doped with Li as an EIL are sequentially deposited. In the case of forming the EL layer  308  for blue emission for example, CuPc having a thickness of 30 nm and a-NPD having a thickness of 60 nm are sequentially deposited. Then, by using the same mask, bis[2-(2-hydroxyphenyl)-benzoxazolato]zinc:Zn(PBO) 2  having a thickness of 10 nm as a blue EML, BCP having a thickness of 40 nm as an ETL, and BCP having a thickness of 1 nm which is doped with Li as an EIL are sequentially deposited. 
     As described above, CuPc and a-NPD can be used in common to form the EL layer for each color over the entire pixel portion. In addition, the same mask can be used for each color EML for each color in such a manner that a mask is moved after forming the red EML to form the green EML, and then, it is moved again to form the blue EML. The laminate order of the EL layer for each color may be set appropriately. 
     In addition, in the case of white light emission, a full color display may be performed by additionally providing color filters, or color filters and color conversion layers. The color filters and the color conversion layers are formed on the second substrate, and the first substrate and second substrate may be attached to each other. 
     The first electrode  307  and the second electrode  309  may be formed by using light-transmitting materials. Therefore, light from the light emitting element is emitted in the both directions of the first substrate  303  and the second substrate  301 . That is, the light emitted from the light emitting element can be recognized from either side of the first substrate  303  or the second substrate  301 . In other words, the light emitted from the light emitting element can be recognized even in an area having no reflector of the second substrate  301 , namely in the light-transmitting area. In addition, an image of an object disposed on the first substrate  303  side is input to the image pickup device  311  after being reflected on the reflector of the second substrate  301 . 
     Materials for forming the first electrode  307  and the second electrode  309  of the light emitting element may be selected by taking account of its work function. In this embodiment mode, the first electrode  307  and the second electrode  309  are assumed to be an anode and a cathode respectively. 
     As for the anodic material, it is preferable to use a metal having a large work function (4.0 eV or more), an alloy, an electrically conductive compound, a mixture of them or the like. Specifically, indium tin oxide (ITO), indium zinc oxide (IZO) in which 2 to 20% of zinc oxide (ZnO) is mixed with indium oxide, gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium (Pd), nitride metal materials (TiN) or the like can be used. 
     As for the cathodic material, it is preferable to use a metal having a small work function (3.8 eV or less), an alloy, an electrically conductive compound, a mixture of them or the like. For example, elements that belong to the first group or the second group of a periodic table, namely alkali metals such as Li and Cs, and alkaline earth metals such as Mg, Ca and Sr, alloys including these elements (Mg:Ag, Al:Li), chemical compounds including these elements (LiF, CsF, CaF 2 ) and in addition, transition metals including rare earth metals can be used. However, since the cathode is required to have light transmissivity, it is formed extremely thin by using these metals or an alloy including these metals, and laminated with a metal such as ITO (including alloys). These anode and cathode may be formed by vapor deposition, sputtering or the like. 
     According to the pixel structure described above, either the first electrode  307  or the second electrode  309  can be used as an anode or a cathode. For example, it is possible that the driving transistor has an N-type polarity, the first electrode is the cathode, and the second electrode is the anode. 
     In addition, the protective film  310  is deposited by sputtering or CVD to block out moisture and oxygen. It is possible to fill nitrogen or place a drying agent in the space provided between the protective film  310  and the second substrate  301  at this time. Furthermore, a hygroscopic organic material may be filled in the space instead. 
     In addition, when disposing a polarizing plate or a circular polarizing plate as shown in  FIG. 5A , a first polarizing plate (first circular polarizing plate)  315  is disposed outside the first substrate  303  (opposite side of the light emitting element) while a second polarizing plate (second circular polarizing plate)  316  is disposed on the side having the light emitting element on the second substrate  301  having depressions and projections. At this time, an opening is formed on each of the first polarizing plate  315  or the second polarizing plate  316  in order to input image data to the reflector. The opening is formed in every pixel, and it is preferable that the opening is formed at least in an area facing the reflector. The number, the shape or the position of the openings may be designed appropriately. 
     Alternatively as shown in  FIG. 5B , a planarizing film  317  may be formed by using acrylic or an organic material such as polyimide over the second substrate  301  having depressions and projections, and the second polarizing plate  316  may be disposed outside the planarizing film  317  (the opposite side of the light emitting element). In this case, each of the first polarizing plate  315  and the second poalrizing plate  316  is not required to have an opening, however, it may be formed in an area facing the reflector. 
     In  FIGS. 5A and 5B , the first polarizing plate  315  and the second planarizing plate  316  are disposed in crossed nicols. Alternatively, in the case of using a circular polarizing plate including a ¼ lambda plate and a polarizing plate, these polarizing plates are disposed to be in crossed nicols. However, they may come off the crossed nicols within a range of 10 degrees. 
     By disposing the polarizing plate or the circular polarizing plate in the above manner, contrast of the display panel can be enhanced. 
     The display panel fabricated in this manner is quite thin and light, therefore, downsizing of the panel can be achieved. 
     Such a display device having an image pickup function can be implemented with other embodiment modes described above. That is, the display device having an image pickup function fabricated as in this embodiment mode can be mounted on a portable phone or a videophone system. 
     Embodiment Mode 5 
     Described in this embodiment mode is an example of forming a display device having an image pickup function by using a display panel (liquid crystal panel) having liquid crystal elements. 
     As shown in  FIG. 11A , a P-channel driving TFT  401  disposed over a light-transmitting substrate  400  has a crystalline semiconductor film which is applied crystallization by laser irradiation or heat treatment, or by using catalysis of metal elements such as nickel or titanium. A gate electrode and a gate line are formed over the semiconductor layer with a gate insulating layer interposed therebetween, and the semiconductor layer under the gate electrode corresponds to a channel forming region. Impurity elements such as boron are added to the semiconductor layer in a self-aligned manner by using the gate electrode as a mask, thus impurity regions of a source region and a drain region are obtained. A first insulating layer is formed so as to cover the gate electrode, and contact holes are formed in the first insulating layer on the impurity regions. The contact holes are formed with wirings which function as a source wiring and a drain wiring. Note that influences of concavity and convexity of a source wiring, a drain wiring and other wirings are reduced and a constant voltage is applied to a liquid crystal layer  404 . Therefore, a planarizing film  402  is preferably formed by using an organic material. 
     A pixel electrode  403  is disposed so as to be electrically connected to the drain electrode. Over the pixel electrode  403 , an orientation film (not shown) is disposed, and then processed by rubbing. In this embodiment mode, the pixel electrode  403  is formed of a light-transmitting conductive film such as ITO. 
     As in Embodiment Mode 4, the second substrate formed with the reflector  302  is prepared as an opposed substrate  406  of the liquid crystal panel. The opposed substrate  406  is formed with a polarizing plate (second polarizing plate)  407 , a color filter  408  and an opposed electrode  409  in this order. Over the opposed electrode  409 , an orientation film (not shown) is disposed, and then processed by rubbing. 
     The first substrate  400  is attached to the second substrate  406  with the liquid crystal layer  404  injected between them. The liquid crystal layer  404  is desirably injected in vacuum. Alternatively, the liquid crystal layer  404  may be dropped on the first substrate  400 , and then the second substrate  406  may be attached thereto. When using a large substrate in particular, dropping is more suitable than injection to fill the liquid crystal layer  404 . Subsequently, a polarizing plate (first polarizing plate)  410  is formed in the first substrate  400  side. 
     In such a liquid crystal display panel, an opening area  405  is formed so as to transmit image data. The image data is input to an image pickup device  411  after passing through the opening area  405  and being reflected by the reflector  302 . Therefore, it is preferable that the opening area is formed in every pixel in order to increase light-transmittancy. The shape or the number of the opening areas may be designed appropriately. For example, multiple small opening areas may be formed in every pixel. Furthermore, the number or the area of the opening areas can be reduced by enhancing a sensitivity of the image pickup device  411  or performing image corrections. 
     In the opening area  405 , an opening (also referred to as an opening area) is formed in the non-light transmitting film. Therefore, an opening portion is formed by patterning each of the opposed electrode  409 , the color filter  408  and the polarizing plates  407  and  410 .  FIG. 11B  illustrates a top plan view of the liquid crystal panel, in which the opposed electrode  409  and the opening area  405  are formed at an intersection of a signal line  412  and a scan line  413 . FIG  11 C includes polarizing plates  407  and  410 . An opening is formed corresponding to the opening area  405 . Note that  FIG. 11A  is a cross-sectional diagram of each of the top plan views in  FIGS. 11B and 11C  taken along a line A-A′. 
     In addition, the opening may be formed even when the pixel electrode  403  is formed by a light-transmitting conductive film (such as ITO). A part of the liquid crystal layer  404  corresponding to the opening is a light-transmitting area since it includes no opposed electrode  409  or no pixel electrode  403 , and no voltage is applied thereto. 
     Furthermore, it is also possible to form a light-transmitting conductive film in the opening area  405 . At this time, the light-transmitting conductive film may be input an electronic signal which is different from the pixel electrode  403  and the opposed electrode  409 , thereby controlling molecules in the liquid crystal layer  404  in order to maintain the light-tranmissivity all the time. In addition, a lambda/2 plate may be disposed on the polarizing plate within the opening area  405 . 
     By forming the opening in the opening area  405  to obtain light-transmisisvity in this manner, a display device having an image pickup function can be provided by using a liquid crystal panel. 
     In addition, as a liquid crystal material, TN (Twist Nematic) liquid crystal, STN (Super Twist Nematic) liquid crystal or non-twist mode nematic liquid crystal using double refraction can be used. Alternatively, a liquid crystal material which requires no polarizing plate such as polymer dispersed liquid crystal (PDLC) or guest-host (GH) mode liquid crystal can used, in which ferroelectric liquid crystal, nematic liquid crystal, cholesteric liquid crystal or the like is dispersed in polymer. 
     As for the liquid crystal panel, either a light-transmitting liquid crystal panel, a reflective liquid crystal panel or a semi-light transmitting liquid crystal panel can be used. In particular, in the case of fabricating a light-transmitting liquid crystal panel, the pixel electrode  403  is formed of a light-transmitting conductive film. Therefore, the pixel electrode is not required to have an opening. Meanwhile in the case of fabricating a reflective liquid crystal panel, the pixel electrode is formed of a reflective conductive film. Therefore, the pixel electrode is required to have an opening. 
       FIG. 12  illustrates a liquid crystal display panel in which the position of the second polarizing plate  407  is different. Over the second substrate having depressions and projections, a planarizing film  415  is formed by using an organic light-transmitting material such as acryl or polyimide. Then, the second polarizing plate  407  is disposed over the planarizing film  415 . Note that the liquid crystal layer area  416  in  FIG. 12  includes the driving TFT  401 , the planarizing film  402 , the pixel electrode  403 , the liquid crystal layer  404 , the opposed electrode  409  and the color filter  408  each formed over the first substrate  400 . 
     In addition, an opening area may be formed in the display panel having light emitting elements shown in Embodiment Mode 4 as well. For example, an opening may be formed in the first electrode or the second electrode of the light emitting element, or in the polarizing plate or the circular polarizing plate which is disposed appropriately. 
     The display panel fabricated in this manner is quite thin and light, therefore, downsizing of the panel can be achieved. 
     Such a display device having an image pickup function can be implemented with other embodiment modes described above. That is, the display device having an image pickup function fabricated as in this embodiment mode can be mounted on a portable phone or a videophone system. 
     Embodiment Mode 6 
     Described in this embodiment mode is a method for correcting an image that is shot by the image pickup device described in Embodiment Modes 1 to 5 with reference to  FIGS. 6A and 6B . 
       FIG. 6A  illustrates an image pickup device  701 , a display panel (dual emission panel for example)  705 , a user, a correction A in which a deviation in color or luminance of an image is corrected corresponding to the light transmissivity of the panel and a correction B in which the glare caused by light reflecting on the display panel is eliminated from an image. 
       FIG. 6B  illustrates a flow chart showing a two-way communication system between two parties. Described below is the case where each of the two parties has the identical two-way communication device. 
     In two-way communication, two parties communicate with each other through image pickup devices  701   a  and  701   b , communication circuits  702   a  and  702   b , image processing circuits  706   a  and  706   b , display panel external circuits  704   a  and  704   b , display panels  705   a  and  705   b  and communication circuits  702   a  and  702   b . Each of the image processing circuits  706   a  and  706   b  has a function to perform the correction A and a function to perform the correction B, and each of them is controlled by the display panel external circuits  704   a  and  704   b.    
     Each of the image pickup devices  701   a  and  701   b  shoots an image of the two parties through the display panels  705   a  and  705   b . At this time, the correction A in which a deviation in color or luminance of an image is corrected corresponding to the light transmissivity of the panel is performed. Also, the correction B in which the glare caused by light reflecting on the display panel is eliminated from an image of the two parties is performed. As a result, correction of the images of the two parties are completed. Either the correction A or the correction B can precede or they may be performed at the same time. In addition, each of the correction A and the correction B may be performed by using the same correction circuit. The circuit for performing the correction A may be disposed either between the communication circuits  702   a  and  702   b  and the display panel external circuit  704  or between the display panel external circuit  704  and the display panel  705 . Furthermore, in addition to the function to perform the correction B, a function for processing an image corresponding to a lens or focus may be performed, in which filtering process such as blurring and shrinking is applied to a component of the light emission from the display panels  705   a  and  705   b.    
     Such corrected images are transmitted through the communication circuits  702   a  and  702   b.    
     The images transmitted from the communication circuits  702   a  and  702   b  are input to the display panel external circuits  704   a  and  704   b  respectively, and then displayed on the display panels  705   a  and  705   b . Specifically, video signals of corrected images a and b are input to signal lines disposed in the display panels  705   a  and  705   b.    
     By using the corrected images a and b as described above, communication can be performed with high accuracy. 
     The method for correcting the images in this embodiment mode can be freely implemented with other Embodiment Modes described above. Thus, highly accurate two-way communication system can be provided. 
     Embodiment Mode 7 
     Examples of an electronic apparatus having the display panel mounting the substrate formed with depressions and projections or mounting a fiberscope of the invention include a digital camera, an audio device such as a car audio set, a notebook personal computer and an image reproducing device provided with a recording medium such as a home game player or the like. Specific examples of these electronic apparatuses are shown in  FIGS. 9A and 9B . They show an operative example of electronic device/apparatus in  FIG. 9 . 
       FIG. 9A  illustrates a notebook personal computer which includes a-main body  2201 , a housing  2202 , a display portion  2203 , a keyboard  2204 , an external connecting port  2205 , a pointing mouse  2206 , an image pickup device  2207  inside the housing  2202  or the like. The display panel of the invention mounting the substrate formed with depressions and projections or mounting a fiberscope can be used in the display portion  2203 . Thus, a two-way communication system using notebook personal computers can be provided. 
       FIG. 9B  illustrates a mobile computer which includes a main body  2301 , a display portion  2302 , a switch  2303 , an operating switch  2304 , an infrared port  2305 , an image pickup device  2307  inside the housing  2306  or the like. The display panel of the invention mounting the substrate formed with depressions and projections or mounting a fiberscope can be used in the display portion  2302 . Thus, a two-way communication system using mobile computers can be provided. 
     In above described electronic apparatuses, by applying the display panel of the invention mounting the substrate formed with depressions and projections or mounting a fiberscope to the above electronic apparatuses, a two-way communication system in which two parties can communicate while catching each other&#39;s eyes can be provided. 
     Any one of Embodiment Modes as described above can be applied to the electronic apparatuses of this Embodiment Mode. 
     Embodiment 
     Embodiment 1 
     Described in this embodiment is a simulation result of a shooting range in the case of using the second substrate having depressions and projections shown in  FIG. 1C . 
     Referring to  FIG. 7 , X-axis denotes a shootable width (mm) while Y-axis denotes a distance from the shooting position, namely a distance between the display panel and an object (mm). In addition, a range in which an image can be input to the image pickup device through reflection by multiple reflectors is denoted by lines (line 1 to line 61). 
       FIG. 7  includes a shootable area A and a non-shootable area B. Each of the shootable area A and the non-shootable area B can be set by appropriately determining an angle, the shape, the number of reflectors, the position of the image pickup device, an optical system or the like. 
     Generally, an object to be shot is positioned to face the display portion. Therefore, the shootable area A desirably takes up the largest areas in front of the display surface as possible. Meanwhile, the non-shootable area B may desirably around the display panel, namely around the display portion. In addition, the non-shootable area B desirably performs an image-connecting processing and an interpolation processing by using the shootable area A. 
     An image passed through the shootable area A is inverted by a reflector and a range of the shootable area A varies according to the direction, resulting in variations in resolution of an image. For preventing this, filtering such as an image inverting processing is desirably performed. Furthermore, image correction for preventing a glare caused by light reflecting on the panel is desirably performed. 
     This application is based on Japanese Patent Application serial no. 2003-275185 filed in Japan Patent Office on 16th, July, 2003, the contents of which are hereby incorporated by reference. Although the invention has been fully described by way of Embodiment Modes and Embodiments with reference to the accompanying drawings, it is to be understood that various changes and modifications will be apparent to those skilled in the art. Therefore, unless such changes and modifications depart from the scope of the invention hereinafter defined, they should be constructed as being included therein.

Technology Classification (CPC): 7