JP4515161B2 - Display device with imaging function and bidirectional communication system - Google Patents

Description

  The present invention relates to a display device with an imaging function capable of simultaneously displaying an image and capturing a subject, and more particularly to a display device with an imaging function capable of simultaneously capturing and displaying a user as a subject. The present invention also relates to a two-way communication system that allows a user to view an imaging screen of a conversation partner while imaging a user as a subject.

  In recent years, with the speeding up of communication networks, so-called interactive interactive systems have been developed, such as videophone systems and videoconferencing systems, in which conversations are made while communicating with each other while viewing images.

  In a two-way interactive system, a mechanism for simultaneously capturing a user (subject) and displaying an image has been devised.

  For example, a display / imaging device including a special screen that becomes transparent and opaque depending on an incident angle of light, an imaging device and a projection display device behind the screen is disclosed (for example, see Patent Document 1). .) In this display / imaging device, the projection display device is arranged in the direction of the opaque field of view of the screen to display the projected image, thereby enabling the line of sight of the interlocutors to be matched.

  However, according to the patent document, a special screen is required, and it is necessary to use an imaging device and a projection display device, and it is not possible to avoid an increase in size and weight of the device. It could not be applied to portable electronic devices.

  In addition, a bidirectional interactive system that matches the line of sight with a conversation person is disclosed (for example, see Patent Document 2). This interactive interactive system includes a display means having a monitor for displaying an image of a partner to interact with, a position defining means for defining the position of the conversation person with respect to the monitor screen, an imaging unit for imaging the conversation person itself, A support mechanism for setting the imaging unit at a predetermined position between the conversation person and the monitor is provided. In particular, the imaging unit is located within the line-of-sight matching region defined by the position specified by the position specifying unit and the parallax angle at which the lines of sight between the interrogators are determined to match, and blocks a part of the partner monitor image. There are certain installations.

  However, in the two-way interactive system of the patent document, a camera as an image pickup unit is arranged on the entire surface of the monitor (display screen) so that the user is always aware of the presence of the camera. In addition, when the camera blocks a part of the monitor image, a part of the screen becomes invisible.

  In addition, a display device with an imaging function that can image a subject simultaneously with display without removing the line of sight of the subject viewing the display image is disclosed (for example, see Patent Document 3). This display device is composed of display means having a display screen, a pinhole portion drilled on the display screen, and an imaging unit having the pinhole portion as a line of sight of the optical path. With this configuration, it is possible to capture an image of a user who is simultaneously viewing the display screen while displaying an image on the display screen.

However, in the display device with an imaging function of the same patent document, a part of the display screen is lost even if it has a small diameter by opening a pinhole, so a high-definition and high-quality image is displayed. Can not do it. In addition, since there is a limit to reducing the diameter of the pinhole, when the display screen is small like a mobile phone, a pixel defect portion due to the pinhole becomes relatively large. Therefore, it is impossible for the user to completely wipe out the uncomfortable feeling.
Japanese Patent Laid-Open No. 6-30406 (page 2, FIG. 2) JP-A-9-130768 (page 10-11, FIG. 1) JP 2001-231019 (pages 7-8, FIG. 5)

  Therefore, the present invention can reduce the size and weight of the device, and can provide a picture quality by disposing a camera on the display screen to block the image, or by piercing a pinhole portion so that a part of the image is lost. It is an object of the present invention to provide a display device with an imaging function and a bidirectional communication system capable of simultaneously capturing a user and displaying an image as a subject without lowering the image quality.

  In addition, the present invention can reduce the size and weight of the device, and can display the image and capture the image at the same time without removing the line of sight of the subject viewing the display image, and bidirectional communication. The purpose is to provide a system.

  The present invention is a display device with an imaging function including a display unit formed by arranging self-luminous pixels that can transmit at least visible light and can be controlled by voltage or current, and an imaging unit.

  The display means can display various images such as still images and moving images by controlling the light emission of each pixel so that the user can visually recognize the images. As a preferable form of this pixel, it is formed of an element capable of controlling light emission such as luminance and lighting time by voltage or current. More preferably, a mode in which a pixel is formed using a light-emitting element in which a light-emitting substance is interposed between a pair of translucent electrodes is recommended. This light-emitting substance is preferably a substance that exhibits electroluminescence, and does not prevent other related substances in addition to this substance from intervening between the pair of electrodes.

  As a display means applied to the present invention, a light emitting element in which a luminescent substance is interposed between a pair of electrodes is arranged in a matrix on a light-transmitting flat plate capable of transmitting at least visible light. It is preferable to form. By forming the display means on the flat substrate, it is possible to reduce the thickness and weight.

  The light emitted from the pixels includes light in the visible light band, and pixels that emit light in the same emission color may be arranged to form display means, or pixels of a specific emission color may be formed in specific areas. So-called area color type display means arranged may be formed, or display means capable of realizing multicolor display by arranging a plurality of pixels having different emission colors. Further, the display means may be formed by arranging white light emitting pixels. Further, in the configuration of the display means, the user may be able to visually recognize the light emission of the pixel through the colored layer (color filter).

  The pair of electrodes that are constituent elements of the light-emitting element and the layer containing a light-emitting substance interposed therebetween are preferably formed using a light-transmitting material or a thickness that can maintain the light-transmitting property. For example, as a material for forming a pair of electrodes, a light-transmitting conductive film material (ITO, ITSO, IZO, ZnO) containing indium oxide, zinc oxide, or tin oxide, aluminum containing alkali metal or alkaline earth metal, silver In addition, organic compound materials containing other metal materials, alkali metals or alkaline earth metals are selected. The pair of electrodes is preferably formed using these materials and thinned to such an extent that the visible light can be transmitted (in the case of a metal material, the thickness is 100 nm or less, preferably about 20 to 50 nm).

  In the present invention, when one of the pair of electrodes constituting the light-emitting element is formed using a transparent conductive film material and the other is formed of the above-described metal material and the film thickness is controlled, the light-emitting substance emits light. It is possible to vary the rate at which the light is emitted to the outside. That is, the ratio of the emitted light intensity can be increased on the one electrode side formed using the transparent conductive film material than on the other electrode side formed of the metal material.

  In the present invention, a light-emitting element having such a light-transmitting property is formed over a substrate having a light-transmitting property, so that the display means has a self-luminous property and can transmit visible light.

  In the present invention, the imaging means is disposed on the back surface of the display means and is disposed at a position that cannot be directly recognized by the user. The imaging means can image a subject through the display means. In other words, the imaging unit is arranged to receive the light transmitted through the display unit or the display unit and the substrate on which the display unit is disposed, and image the subject.

  As the image pickup means, it is preferable to use a camera in which the light receiving part is formed by a CCD (CCD: charge coupled device) type or CMOS (Complementary MOS) type photosensor. The imaging means is arranged on the back of the display means. In this case, the optical sensor of the light receiving unit does not necessarily have to face the user who is the subject, and an optical system such as a lens and a mirror is not necessary. Alternatively, external light may enter the optical sensor.

  In the present invention, the display means is formed of a self-luminous light-emitting element and has a translucent structure, so that light emission from the light-emitting element is not only on one surface side visually recognized by the user, It may be radiated also to the side where the imaging means is arranged. In that case, it is preferable that the imaging unit is provided with a correction unit that performs a luminance correction according to the transmittance of the display unit and a correction that subtracts the reflection due to light emission from the display unit.

  When one of the pair of electrodes constituting the light-emitting element is formed using a transparent conductive film material and the other is formed of the above-described metal material and the film thickness is controlled, light when the light-emitting substance emits light In the case of using display means configured to vary the ratio of radiating to the outside, the imaging means is preferably arranged on the electrode side formed of a metal material.

  With the above configuration, when the user is opposed to the display screen, it is possible to simultaneously perform imaging of the user who is the subject and visual recognition of the displayed image. That is, it is possible to simultaneously display and capture an image without removing the line of sight of the user who is the subject viewing the display image. In particular, by using the same interactive interactive apparatus of the present invention for a conversation person and a partner, it is possible to communicate with the partner and the line of sight.

  In the present invention, the image pickup means is arranged behind the display means and on the line of sight of the conversation person. Then, the conversation person can take a picture while viewing his / her video displayed on the display device and simultaneously aligning his / her line of sight with the imaging device. Here, on the line of sight includes being on the same vector line as the direction of the line of sight, and matching the line of sight includes matching the line of sight after the light on the line of sight undergoes optical conversion such as reflection or refraction. For example, the method includes reflecting light by a reflector and matching the line of sight between the conversation person and the other party.

  The two-way communication system of the present invention includes the above-described displayable image display device of the present invention, and displays a call destination image on a display means, and at the same time, can capture a user who is a subject.

  The two-way communication system of the present invention is a two-way communication system in which both senders and receivers can communicate by wire or wireless while viewing images of the other party on the display screen. And a display device with an imaging function capable of capturing an image of a user who is a subject at the same time as displaying an image of a called party on a display means. It is what. It is possible to display the image of the other party and characters, figures, and symbols on the display screen.

  According to the present invention, there is provided a display device with an imaging function that can be reduced in size and weight without using a complicated optical system or an optical system having a long optical path by mounting a dual emission display panel and an imaging unit. Can do. That is, according to the configuration of the present invention, when the user faces the display screen, it is possible to simultaneously perform imaging of the user who is the subject and visual recognition of the displayed image. Then, it is possible to simultaneously display and capture an image without removing the line of sight of the subject viewing the display image. In particular, by using the same interactive interactive apparatus of the present invention for a conversation person and a partner, it is possible to communicate with the partner and the line of sight. In addition, according to the present invention, it is possible to provide a display device with an imaging function and a bidirectional communication system that can simultaneously display and capture an image without removing the line of sight of a subject viewing the display image.

  Embodiments of the present invention will be described below with reference to the drawings. However, the present invention can be implemented in many different modes, and those skilled in the art can easily understand that the modes and details can be variously changed without departing from the spirit and scope of the present invention. Is done. Therefore, the present invention is not construed as being limited to the description of this embodiment mode. Note that in the drawings used for describing the embodiments, the same portions or portions having similar functions are denoted by the same reference numerals in different drawings, and redundant description is omitted.

(Embodiment 1)
In this embodiment, a videophone device is described as one mode of a display device with an imaging function.

  FIG. 1A is a perspective view of a videophone device, which includes a display unit (double-sided emission type panel) 10 and an imaging device (imaging unit) 11 arranged behind the display unit 10. An image of the other party is displayed on the first display surface 12 of the display means. As the display surface of the display means 10, the first display surface 12 and the second display surface opposite to the first display surface 12 can be used. In the present embodiment, the image of the other party is displayed on the first display surface 12. For example, when displaying the other party's image on the second display surface, a circuit for inverting the image may be provided.

  The conversation person 13 is on the first display surface 12 side and visually recognizes the first display surface so as to match the line of sight of the other party's video. Further, in the imaging means 11, specifically, the photographing lens 14 is arranged so as to be on the line of sight of the conversation person 13. At this time, the image pickup means 11 is in a range of a distance that allows the conversation person 13 to pick up an image, and needs to be focused on the conversation person.

  FIG. 1B shows a top view of the videophone device, and shows a display means 10, an imaging means 11, and a first display surface 12. When the conversation person 13 faces the front of the first display surface 12, the other conversation person can match the line of sight of the conversation person 13 in the image captured by the imaging unit 11.

  By using such a videophone device, a conversation person can have a conversation with his / her line of sight. In addition, since a conversation person who has a conversation while looking at the display means does not have an image pickup means in front of the display means, it is not necessary to recognize the image pickup means in the field of view. You can have a good conversation. In particular, even if the display means of the videophone device is enlarged, it is not necessary to arrange the image pickup means in front of the display screen, and the image pickup means can be arranged so that the line of sight of the interlocutor and the other party is matched.

  In the display device with an imaging function of this embodiment mode, display means that is light-transmitting and formed by arranging self-luminous pixels, or a light-emitting substance is interposed between a pair of electrodes, and at least one electrode By using a display means that is formed by arranging light-emitting elements that can radiate light from the outside and can transmit external light on a light-transmitting substrate, it is lighter and thinner than conventional technologies. Can be achieved. Specifically, when a display unit is used in which light-emitting elements having a light-emitting substance interposed between a pair of electrodes are arranged in a matrix on a light-transmitting flat plate capable of transmitting at least visible light. good.

In the case of a videophone device in which the display means and the image pickup means are separated as described above, the arrangement of the image pickup means can be freely designed according to the use form of the conversation person.

  In the present embodiment, the videophone device in which the display unit and the imaging unit are separated is shown, but an integrated videophone device can also be configured.

  Also, a bidirectional communication system can be constructed by installing such a videophone device on the conversation party side and the other party side and connecting them with a wired or wireless communication line.

  In the present embodiment, it is not always necessary that the photographing lens in the image pickup means is arranged on the line of sight of the conversation person. You may arrange | position so that it may fit. For example, by arranging a reflector such as a mirror between the display means and the imaging means, the conversation person and the other party can talk with each other in line of sight.

(Embodiment 2)
In this embodiment, a mobile phone is described as one embodiment of a display device with an imaging function.

  2A is an enlarged view of the display means (display panel), FIG. 2B is a perspective view of the mobile phone, and FIG. 2C is an overall view of the mobile phone.

  In the display panel 100 in FIG. 2A, a pixel portion 101, a signal line driver circuit portion 102 which is a driver circuit portion, and a scan line driver circuit portion 103 are integrally formed. The signal line drive circuit unit 102 and the scanning line drive circuit unit 103 are connected to an external circuit via a connection terminal 105, for example, an anisotropic conductive film (ACF) or a flexible printed circuit board (FPC). And a signal is input. The external circuit has a power supply circuit, a controller, and the like.

  The display panel 100 can be either an active matrix type or a passive matrix type. In the case of the passive matrix type, it is easy to increase the aperture ratio and high translucency compared to the active matrix type.

  In the display panel, a first electrode and a second electrode (corresponding to a cathode and an anode of a light-emitting element) provided as a pair of electrodes have a light-transmitting property, so that reflection of external light is reduced. Therefore, it can be set as the structure which does not provide the circularly-polarizing plate for preventing scattering of external light. Depending on the structure of the display panel, it is necessary to prevent reflection of external light. In that case, a circularly polarizing plate may be provided as appropriate.

  Even when the display panel performs black display (when an OFF signal is input), the display panel is held in the case of the mobile phone as in this embodiment, so that the back surface of the display panel is black or has a similar color tone. Therefore, a clear black display with high contrast can be performed.

  Moreover, you may provide a polarizing plate in a display panel as needed. For example, when using a linearly polarized polarizing plate, if it is placed in a crossed Nicols state on both sides of the display panel, it will be impossible to see the back side (for example, a third party). The problem is solved if the axes are arranged with the axes shifted. As a more preferable form, a means for making the angle of the pair of polarizing plates variable is provided, and when imaging is not performed, the polarizing plate is adjusted to a crossed Nicol position, and when imaging is performed, if necessary, It is recommended to shift the optical axis from the cross Nicos state. Moreover, you may arrange | position a polarizing plate or a circularly-polarizing plate on both surfaces or one side of a double emission panel.

  Further, an antireflection film may be provided by performing an antiglare treatment that diffuses reflected light by unevenness on the surface and reduces reflection, or an antireflection treatment that performs a heat treatment. In addition, a hard coat treatment may be applied to protect from external impacts.

  FIG. 2B shows a mode in which the imaging unit 111 is arranged at a position behind the display panel 100 as shown in FIG.

  The imaging unit 111 is installed at a predetermined position of the first housing 112. As the imaging means 111, for example, a CCD type or CMOS type camera may be used. Integrated circuit parts and chip parts (resistors, capacitors, coils, etc.) for controlling the imaging means are arranged on a wiring board (a board forming a circuit such as a printed board) installed in the first casing 112 or the third casing 115. ) Has been implemented. Further, an image processing circuit and the like are provided on the wiring board, and an external circuit for driving the display panel is provided. The video processing circuit includes a circuit that corrects display color and luminance deviation, and performs correction such that a transmission deviation component is subtracted from the video. Specifically, the correction can be performed with reference to the means described in the seventh embodiment.

  As one mode of the display panel 100, a signal line driver circuit and a scan line driver circuit can be integrally formed on a substrate. However, an IC chip is mounted on a wiring substrate, and a signal line driver circuit or a scan line driver is mounted. A circuit may be externally attached.

  The first casing 112 and the display panel 100 are sandwiched between the second casings 114 and fixed in the casing. An audio output unit 113 is provided on the second housing 114 side.

  As shown in FIG. 2C, the third housing 115 includes an operation button 116, a voice input unit 117, and the like, and the first and second housings 112 on the display panel side via hinges (hinges). , 114.

  In the mobile phone shown in this embodiment mode, the imaging device is on the back side of the display panel, and the imaging lens is on the conversation person's line of sight when the user (dialogue and partner) faces the display panel. Has been placed. As a result, a conversation or the like can be performed in a state where the line of sight of the conversation person and the line of sight of the other party are matched. Of course, as the configuration of the imaging means, an optical system may be configured by appropriately combining optical components such as lenses and mirrors.

(Embodiment 3)
In this embodiment, one mode of a mobile phone including a dual emission display panel and an imaging unit will be described.

  FIG. 3 shows a first housing diagram and a cross-sectional view corresponding to A-A ′ in the mobile phone according to the present embodiment.

FIG. 3A illustrates a dual emission display panel 100 in which a light-transmitting pixel is provided in a first housing 112, and a mirror 120, an imaging unit 111, an IC, and the like on the back side of the panel. The form provided with the mounted wiring board (circuit board) 123 is shown.
That is, the imaging unit 111 is provided on the wiring board, the lens unit of the imaging unit 111 faces the mirror, and the mirror 120 displays an image of a user or the like via the display panel 100. That is, the mirror 120 needs to capture the imaging range of the imaging unit 111 and the range of the user or the like via the dual emission display panel. Therefore, the arrangement of the mirror 120 is an intersection of the extension line of the lens unit of the imaging unit 111 and the extension line of the user, for example, the extension line of the eye line, and forms 30 to 80 degrees from the extension line of the lens unit. Like that. At this time, the user's image may be displayed on the mirror 120 in a state of being condensed by a lens or the like. As a result, the arrangement of the mirror 120 can be made closer to the dual emission display panel 100, and the mobile phone can be miniaturized.

  The mirror 120 is preferably attached to be rotatable. That is, the mirror 120 is controlled by a switching circuit provided on the circuit board 123, and the optical path of the imaging unit 111 is switched by a mechanical or electromagnetic control unit. This can also be performed by the user switching with a switching button provided on the surface of the housing.

  The mirror 120 only needs to rotate at an angle that allows at least the light transmitted through the dual emission display panel 100 to be received and transmitted to the imaging means. For example, the angle may be 45 degrees with respect to the dual emission display panel 100 and 45 degrees from the straight line of the imaging unit 111. The mirror arranged in this way reflects the light from the dual emission display panel 100 so that the imaging means 111 can read an image. By using such a mobile phone having the dual emission display panel 100, the mirror 120, and the imaging means 111, communication can be achieved while looking at each other's images.

  FIG. 3B shows a state in which the direction of the mirror 120 is switched by the switching button. This state is referred to as a digital camera mode because shooting is mainly performed instead of bidirectional communication for displaying the other party. In the digital camera mode, shooting can be performed from the imaging surface 121. At this time, the mirror 120 is in a state of, for example, 45 degrees with respect to the imaging surface 121, that is, 45 degrees from the extended line of the lens unit.

In the present invention, photographing may be performed using the dual emission display panel 100 as an imaging surface.

  Thus, by using a dual emission display panel provided with translucent pixels, communication can be achieved while looking at each other's images, and by incorporating means for switching the optical path during imaging, the first is achieved. The camera can be photographed from both the housing 112 side and the second brother 114 side, and can be used as a camera-equipped mobile phone capable of photographing still images and moving images.

(Embodiment 4)
In this embodiment mode, a mobile phone which has a dual emission display panel and has a function different from that of Embodiment Mode 3 will be described.

  FIG. 4 shows a mobile phone equipped with reading means (barcode reader) as means for reading information such as a barcode. FIG. 4A shows the back of the mobile phone. The imaging unit 111 disposed behind the dual emission display panel 100 provided in the first housing 112 and a third housing 115 connected via a hinge (hinge). The mobile phone is equipped with a reading means for inputting information on an object to be read, for example, a barcode 150. In this case, a part or the whole of the double-sided emission panel is used as a light source, the barcode 150 is held over the display surface, and information is read by the imaging unit 111. Since the dual emission panel 100 has translucency, information can be input by the imaging unit 111.

  The reading target is not limited to a bar code, and may be a sign that identifies various types of information using optically readable characters, symbols, figures, codes, and patterns. Further, as shown in FIG. 4B, biometric information 151 such as a fingerprint or a palm print may be read. FIG. 4B shows a front surface of a mobile phone, a dual emission display panel 100 provided in the first housing 112 and the second housing 114, and an imaging unit disposed behind the panel 100. 111 and a third casing 115 connected via a hinge (hinge), and the third casing 115 includes an operation button 116, a voice input unit 117, and the like. Biological information 151 such as a fingerprint or a palm print is placed over the display surface of the dual emission display panel 100, and the information is read by the imaging means 111. At this time, a part or the whole of the dual emission display panel can be used as a light source, and reading can be performed even in a dark place.

  Thus, by providing the mobile phone with a function of reading information, security can be improved and unauthorized use by users other than users can be prevented. In addition, the accuracy of identity recognition can be increased compared to the case where identity recognition is performed using a password or the like. When the cellular phone of this embodiment is provided with a cache function, security and reliability can be improved.

(Embodiment 5)
In this embodiment mode, a structure of a dual emission display panel applicable to Embodiment Modes 1 to 4 will be described.

  FIG. 5 is a cross-sectional view of a pixel portion of a dual emission display panel. Note that the driving transistor described in this embodiment mode is described using an example in which a thin film transistor (TFT) including a polycrystalline silicon film formed over an insulating substrate is used; however, a thin film transistor including an amorphous silicon film and single crystal silicon are described. A MOS transistor having the above may be used. Further, although the polarity of the driving TFT is described in the case of the p-channel type, it is needless to say that the n-channel type may be used.

  As shown in FIG. 5, the driving TFT 301 provided on the substrate 300 having an insulating surface has impurity regions to be a source region and a drain region formed by adding an impurity element such as boron to a semiconductor film. A semiconductor film that has been subjected to crystallization treatment by laser irradiation or heating or crystallization treatment using a catalytic action of a metal element such as nickel or titanium is used. A gate electrode and a gate line (scanning line) are provided on the semiconductor film via a gate insulating film, and the portion is configured to be a channel formation region. A first insulating film is provided so as to cover the gate electrode, and a contact hole is formed in the first insulating film over the impurity region. The wiring formed in the contact hole functions as a source wiring (signal line) and a drain wiring. A video signal is input to the signal line, and light is emitted from the light emitting element with luminance corresponding to the video signal. A first electrode 311 is provided so as to be electrically connected to the drain electrode. Then, a second insulating film is provided so as to cover the first electrode 311, and an opening is formed on the first electrode 311 which is the second insulating film. A layer 312 having an organic compound (hereinafter referred to as an organic compound layer (EL layer)) 312 is provided in the opening, and a second electrode 313 is provided so as to cover the organic compound layer 312. A self-luminous pixel that can be controlled by applying voltage or current to the first electrode 311 and the second electrode 313 can be formed.

  The organic compound layer 312 is laminated in the order of HIL (hole injection layer), HTL (hole transport layer), EML (light emitting layer), ETL (electron transport layer), and EIL (electron injection layer) in this order from the anode side. . Typically, CuPc is used as HIL, α-NPD is used as HTL, BCP is used as ETL, and BCP: Li is used as EIL.

In the case of full color display, a material that emits red (R), green (G), and blue (B) light is selected as the organic compound layer 312 by an evaporation method using an evaporation mask or an inkjet method, respectively. It may be formed automatically. Specifically, CuPc or PEDOT is used as HIL, α-NPD is used as HTL, BCP or Alq _{3 is used} as ETL, and BCP: Li or CaF ₂ is used as EIL. Further, for example, EML may be Alq ₃ doped with a dopant corresponding to each emission color of R, G, and B (DCM in the case of R, DMQD in the case of G). In addition, it is not limited to the laminated structure of the said organic compound layer.

More specifically, in the case of forming the organic compound layer 312 that emits red light, for example, after forming 30 nm of CuPc and 60 nm of α-NPD, using the same mask, Alq ₃ to which DCM ₂ and rubrene are added is formed to 40 nm as a red light emitting layer, BCP is formed to 40 nm as an electron transport layer, and BCP to which Li is added is formed 1 nm as an electron injection layer. When forming the organic compound layer 312 that emits green light, for example, after forming CuPc to 30 nm and α-NPD to 60 nm, coumarin 545T is added as a green light-emitting layer using the same vapor deposition mask. The formed Alq ₃ is formed to 40 nm, BCP is formed to 40 nm as the electron transport layer, and BCP doped with Li is formed to 1 nm as the electron injection layer. In the case of forming the organic compound layer 312 that emits blue light, for example, CuPc is formed to 30 nm and α-NPD is formed to 60 nm, and then the bis [2- (2-hydroxy) is formed as the light emitting layer using the same mask. Phenyl) benzoxazolate] zinc: Zn (PBO) ₂ is formed to 10 nm, BCP is formed to 40 nm as an electron transport layer, and BCP to which Li is added is formed to be 1 nm as an electron injection layer.

  As described above, among the organic compound layers 312 of the respective colors, common CuPc and α-NPD can be formed on the entire surface of the pixel portion. The mask can also be shared by each color. For example, after forming the red organic compound layer, the mask can be shifted to form the green organic compound layer, and the mask can be shifted again to form the blue organic compound layer. . What is necessary is just to set the order of the organic compound layer of each color to form suitably.

  In the case of white light emission, a full color display may be performed by separately providing a color filter or a color filter and a color conversion layer. The color filter and the color conversion layer may be attached after being provided over the second substrate.

  The first electrode and the second electrode may be formed using a light-transmitting material. The materials for the first electrode and the second electrode are selected in consideration of the work function. For example, the case where the first electrode is an anode and the second electrode is a cathode will be described.

  As the anode material, it is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a high work function (work function of 4.0 eV or more). Specific examples of the anode material include ITO (indium tin oxide), IZO (indium zinc oxide) in which 2 to 20% 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), or metal nitride (TiN), etc. Can be used.

On the other hand, it is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a low work function (work function of 3.8 eV or less) as the cathode material. Specific examples of the cathode material include elements belonging to Group 1 or Group 2 of the element periodic rule, that is, alkali metals such as Li and Cs, and alkaline earth metals such as Mg, Ca, and Sr, and alloys containing these (Mg : Ag, Al: Li) and compounds (LiF, CsF, CaF ₂ ), as well as transition metals including rare earth metals. However, since the anode and the cathode need to have a light-transmitting property, these metals or an alloy containing these metals are formed very thin, and are formed by lamination with a metal (including an alloy) such as ITO. These anode and cathode can be formed by vapor deposition, sputtering, or the like.

  Depending on the pixel configuration, either the first electrode or the second electrode can be an anode or a cathode. For example, the polarity of the driving TFT 301 can be an n-channel type, the first electrode 311 can be a cathode, and the second electrode 313 can be an anode.

  After that, a passivation film 314 containing nitrogen is formed by a sputtering method or a CVD method to prevent moisture and oxygen from entering. In the space formed at this time, nitrogen may be sealed and a desiccant may be further disposed. Further, the side surface of the display means may be covered with the first electrode, the second electrode, and other electrodes. Thereafter, the sealing substrate 315 is attached.

  In order to display a more beautiful black display, a polarizing plate or a circular polarizing plate is preferably provided. However, since it is necessary for the imaging apparatus to have a light-transmitting property that can recognize a conversation person, for example, a polarizing plate or a circularly polarizing plate may be provided only on one display surface of a dual emission display panel. Alternatively, a first polarizing plate and a second polarizing plate can be provided on both display surface sides of the dual emission display panel, respectively. If the optical axis (respective absorption axis or transmission axis) is slightly shifted from the crossed Nicols state, the first polarizing plate and the second polarizing plate are made to be compatible with each other and having a black display. Good.

  In the dual emission display panel of the present invention thus formed, the first electrode 311 and the second electrode 313 are translucent. The imaging means is arranged on the line of sight of the interlocutor via the dual emission display panel. The conversation person and the image pickup means may be arranged via a dual emission display panel, and the first display means (display surface) side or the second display means (display surface) side of the dual emission display panel. In any case, the imaging means may be arranged. As a result, it is possible to communicate with the eyes lined up. In addition, it is possible to take an image with the imaging means while displaying on the dual emission display panel.

  In the pixel structure shown in FIG. 5, light is emitted in both directions (first display surface and second display surface) through the light emitting layer. Therefore, even if the imaging means is arranged on the first display surface side of the dual emission display panel and the dialogue person is arranged on the second display surface side, the conversation person is arranged on the first display surface side, The image pickup means may be arranged on the display surface side of 2. In this embodiment mode, when a conversation person is arranged on the second display surface side, a circuit that inverts a displayed image may be provided. At this time, it is only necessary to arrange the imaging means so that the line of sight of the interlocutor and the other party matches, and it is not always necessary to arrange the imaging means on the line of sight of the interlocutor via the dual emission display panel. For example, a reflector such as a mirror may be arranged so that the line of sight of the interlocutor and the other party is matched.

  In addition, since light is emitted in both directions, the color and brightness may be shifted, and it may be impossible to recognize the detailed facial expression of the conversation person captured by the imaging means. In that case, information obtained by subtracting the video information displayed on the dual emission display panel may be input to the imaging means. Since the video information of the dual emission display panel is held in the video memory, correction may be made so that the video information of the dual emission display panel is subtracted from the input memory of the imaging means. For example, the correction may be performed as in Embodiment 7 shown below.

  By using such a display device having a dual emission type display panel that can be imaged, it is possible to have a conversation with the line of sight of the other party. Moreover, a bidirectional communication system can be provided by using such a display device capable of imaging.

(Embodiment 6)
In this embodiment mode, a structure of a dual emission display panel which is different from that in Embodiment Mode 5 will be described with reference to FIGS.

  FIG. 6A illustrates a dual emission display panel in which a first region where a light emitting layer is provided and a second region where no light emitting layer is provided are formed in one pixel, that is, an opening of a second insulating film. The pixel configuration is shown.

  The first electrode 403 having a light-transmitting property and in contact with the organic compound layer 404 including the light-emitting layer provided in the first region is electrically connected to the p-channel driving TFT 401 formed over the insulating surface 400. Has been. A second electrode 405 having a light-transmitting property is provided over the organic compound layer 404, and a current flows between the first electrode 403 and the second electrode 405. The direction of the arrow from the organic compound layer 404 Light is emitted in both directions.

  Thus, when light is emitted in both directions, as described in Embodiment 5, the first electrode and the second electrode are made of a light-transmitting conductive film such as ITO, a metal, or an alloy containing these metals. Thus, a film formed so as to be thin enough to transmit light can be used.

  In order to protect the organic compound layer from moisture and oxygen, a passivation film 406 may be provided, and the space may be filled with nitrogen or a desiccant may be provided. Thereafter, sealing is performed with a sealing substrate 407.

  The organic compound layer, the driving TFT, the first electrode 403, the second electrode 405, and the like can be manufactured similarly to Embodiment Mode 5. Since the first electrode 403 has a light-transmitting property, it may be formed over the first region and the second region, but at least the first electrode 403 is formed in the first region. Just do it. On the other hand, since the organic compound layer is colored, it is formed only on the first electrode 403 in the first region. For example, when the organic compound layer is formed by an evaporation method, the size of the opening of the metal mask is set so that the organic compound layer is evaporated only on the first electrode 403.

  In the pixel structure illustrated in FIG. 6A, the first region is a light-emitting region and the second region is a transmissive region; however, the first region can be a transmissive region and the second region can be a light-emitting region. .

In addition, by making the work function of the first electrode smaller than that of the second electrode, the polarity of the driving TFT 401 can be an n-channel type. Even in this case, the first electrode and the second electrode need to have translucency.

  FIG. 6B shows a pixel structure in which light is emitted upward unlike FIG. 6A. An organic compound layer 504 having a light emitting layer provided in the first region is connected to a first electrode 503 connected to a p-channel type driving TFT 501 formed on the insulating surface 500. Since light is emitted upward, the first electrode 503 does not need to have a light-transmitting property and can be shared with the source wiring or the drain wiring of the driving TFT. In the case where the first electrode 503 is shared with a source wiring or a drain wiring of the driving TFT, a first metal layer containing titanium, a second metal layer containing titanium nitride or tungsten nitride, and a third metal containing aluminum. It is preferable to use a stacked layer of the metal layer and a fourth metal layer containing titanium nitride.

  Since the first electrode 503 has a non-light-transmitting property, it is formed only in the first region. The organic compound layer 504 including the light-emitting layer is formed only over the first electrode 503. After that, a second electrode 505 having a light-transmitting property is formed.

  In order to protect the organic compound layer from moisture and oxygen, a passivation film 506 may be provided, and the space may be filled with nitrogen or a desiccant may be provided. Thereafter, sealing is performed with a sealing substrate 507.

  A current flows between the first electrode 503 and the second electrode 505, and light is emitted from the organic compound layer 504. At this time, since the first electrode 503 including a metal material reflects light and the second electrode 505 transmits light, the second region emits light in the second electrode direction, and the first region In, light is not emitted and has translucency.

  The first electrode 503, the organic compound layer 504, and the second electrode 505 can be manufactured similarly to Embodiment Mode 5. However, in the pixel structure illustrated in FIG. 6B, the second electrode needs to have a light-transmitting property. Therefore, a light-transmitting material, a metal, or an alloy thereof is formed thin, and a light-transmitting material is stacked thereover. Further, since light is emitted to the second electrode side, the transmittance of the first electrode does not have to be as small as the transmittance of the second electrode.

  In the pixel structure illustrated in FIG. 6B, the first region is described as a light-emitting region and the second region is a light-transmitting region, but the first region is a light-transmitting region and the second region is a light-emitting region. You can also. Further, by making the polarity of the driving TFT 401 an n-channel type and making the work function of the first electrode larger than that of the second electrode, the light emission direction can be reversed. In this case, since the first electrode has a light-transmitting property, it may be formed in the second region.

  In the pixel configuration in FIG. 6B, light emitted from the organic compound layer 504 does not enter the imaging device, and color shift and luminance shift are less likely to occur.

  FIG. 6C is an enlarged view of a pixel portion having the pixel structure of this embodiment mode. In the pixel configuration shown in FIGS. 6A and 6B, a light emitting region and a transmissive region are formed. The light emitting region and the transmissive region may be arranged so as to be aligned for each row of red (R), green (G), and blue (B). However, as shown in FIG. It is preferable to arrange the transmission regions alternately.

  Compared with Embodiment Mode 5, in FIG. 6B, there is only one light emission direction from the first region, display is performed using the first region, and no light is emitted from the other regions. Therefore, there is a concern that the light emitting area is halved as shown in FIG. Therefore, a reflective film having a metal or a film having a colored resin may be provided in the light emitting region at a position facing the light emission direction. In particular, it is preferable to form a concavo-convex shape in the reflective film to effectively use light.

In the present embodiment, it is possible to perform shooting by the imaging unit using the second region that is not light-emitted and has high translucency, and the recognition accuracy of the conversation by the imaging unit is improved.

(Embodiment 7)
In this embodiment, a video correction method in the imaging unit described in Embodiments 1 to 6 will be described with reference to FIG.

  FIG. 7A shows an imaging device 701, a panel (for example, a dual emission panel) 705, and a conversation person. Correction of color and luminance according to the transmittance of the panel: A and reflection by self-light emission of the panel Correction: Subtract B.

  FIG. 7B shows a flowchart of a bidirectional interactive system between a conversation person and a partner. Hereinafter, a case where the conversation person and the other party have equivalent interactive apparatuses will be described.

  The bidirectional communication includes imaging devices 701a and 701b, communication circuits 702a and 702b, video processing circuits 706a and 706b, panel external circuits 704a and 704b, and panels 705a and 705b, and communication circuits 702a and 702b. Communicating between the interlocutor and the other party. The video processing circuits 706a and 706b have a correction: A function and a correction: B function, and are controlled by the panel external circuits 704a and 704b.

  The imaging devices 701a and 701b capture the conversation person and the other party through the panels 705a and 705b, respectively. At this time, a correction A for correcting a color shift or luminance shift according to the transmittance of the panel is performed. In addition, correction B is performed to subtract the self-luminous component from the panels 705a and 705b on the images of the conversation person and the other party. As a result, the corrected video of the conversation person and the corrected video of the other party are obtained. The order in which correction A and correction B are performed may be performed at the same time, whichever comes first. Further, the correction A and the correction B may be performed using the same correction circuit. A circuit for performing the correction A may be provided between the communication circuits 702a and 702b and the panel external circuits 704a and 704b, or between the panel external circuit and the panel. Further, the image processing function corresponding to the lens and the focus may be subtracted after performing a filter process such as reduction or blurring on the self-luminous components from the panels 705a and 705b in addition to the function of performing the correction B.

  Such corrected video is transmitted / received via the communication circuits 702a and 702b.

  Images received from the communication circuits 702a and 702b are input to the panel external circuits 704a and 704b, respectively, and displayed on the panels 705a and 705b. Specifically, the corrected video signals of video a and video b are input to signal lines provided on the panels 705a and 705b.

  Using the video corrected as described above, high-precision bidirectional communication can be performed.

  The video correction method of this embodiment can be combined with any of Embodiments 1 to 6.

(Embodiment 8)
In the above embodiment mode, the display panel having self-luminous pixels has been described. However, the present invention may be any display panel having translucency. Therefore, for example, a light-transmitting liquid crystal display panel can be used. Note that a transmissive liquid crystal display panel or a transflective liquid crystal display panel can be used as the light-transmitting liquid crystal display panel.

In order to ensure higher translucency, a polarizing plate or the like is not mounted on the panel or a polarizing plate having an opening is mounted on the panel. The opening provided in the polarizing plate can be formed in part of the pixel or in a dot shape over the entire pixel. In the translucent liquid crystal panel, the opening of the polarizing plate may be formed in accordance with the opening of the pixel electrode.
For example, in FIG. 3, a translucent liquid crystal display panel in which a polarizing plate having an opening is mounted as the dual emission display panel 100, and a translucent in which the polarizing plate or the like is not mounted as the imaging surface 121. A liquid crystal display panel having can be used.

Further, a liquid crystal display panel having such translucency and a dual emission display panel may be used in combination. For example, in FIG. 3, a mobile phone in which a dual emission display panel 100 and a light-transmitting liquid crystal display panel in which no polarizing plate or the like is mounted as the imaging surface 121 can be provided.

The figure which shows the video telephone apparatus of this invention. The figure which shows the mobile telephone of this invention. The figure which shows the mobile telephone of this invention. The figure which shows the mobile telephone of this invention. The figure which shows the cross section of the dual emission type panel of this invention. The figure which shows the cross section of the dual emission type panel of this invention. The figure which shows the flowchart for a correction | amendment of this invention.

Claims (18)

And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a pair of translucent electrodes, and self-luminous pixels having translucency are arranged adjacent to each other on a translucent substrate,
The display device with an imaging function, wherein the imaging means is capable of imaging a subject through the light-transmitting self-luminous pixel . And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light-emitting substance interposed between a pair of light-transmitting electrodes, and a light-emitting element having a light-transmitting property is disposed adjacent to the light-transmitting substrate .
The display device with an imaging function, wherein the imaging means is capable of imaging a subject through the light-emitting element having translucency . And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light emitting element interposed between a pair of electrodes and a light emitting element capable of transmitting external light adjacent to the light transmitting substrate.
Of the pair of electrodes, one electrode has a light-transmitting property, and the other electrode has a metal material having a thickness capable of transmitting visible light,
The display device with an imaging function, wherein the imaging means is capable of imaging a subject through a light emitting element capable of transmitting the external light . In claim 2 or 3,
The display device with an imaging function, wherein the light-emitting substance is a substance that exhibits electroluminescence. In any one of Claims 1 thru | or 4,
Wherein the brightness correction according to the transmittance of the display means, said correction means for performing a correction of subtracting the reflection of light emitted from the display unit, the image pickup function-equipped display device, characterized in that provided in the image pickup means . In any one of Claims 2 thru | or 5,
One pixel of the adjacent light emitting element includes a light emitting region in which the light emitting substance is provided between a pair of light transmitting electrodes and a light transmission in which no light emitting substance is provided between the pair of light transmitting electrodes. The area is placed adjacent to the
The display unit with an imaging function, wherein the imaging unit is capable of imaging a subject through the light emitting region and the transmission region of the light emitting element having translucency. In any one of Claims 3 thru | or 5,
In one pixel of the light emitting element arranged adjacent to each other, a light emitting region in which the light emitting substance is provided between a pair of electrodes and a transmission region in which the light emitting substance is not provided between the pair of electrodes are arranged adjacent to each other. ,
The display device with an imaging function, wherein the imaging means is capable of imaging a subject through the light emitting region and the transmissive region of a light emitting element capable of transmitting the external light. And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a pair of translucent electrodes, and self-luminous pixels having translucency are arranged adjacent to each other on a translucent substrate,
The imaging means can image a subject through the light-transmitting self-luminous pixel, and can display the image of the called party on the display means and simultaneously image the subject. Two-way communication system. And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light-emitting substance interposed between a pair of light-transmitting electrodes, and a light-emitting element having a light-transmitting property is disposed adjacent to the light-transmitting substrate .
The bidirectional means characterized in that the imaging means is capable of imaging a subject through the light-emitting element having translucency, and is capable of imaging the subject at the same time as displaying a call destination image on the display means. Communication system. And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light emitting element interposed between a pair of electrodes and a light emitting element capable of transmitting external light adjacent to the light transmitting substrate.
Of the pair of electrodes, one electrode has a light-transmitting property, and the other electrode has a metal material having a thickness capable of transmitting visible light,
The imaging means is capable of imaging a subject through a light-emitting element that can transmit the outside light, and can display the image of a call destination on the display means and simultaneously image the subject. Communication system. In claim 9 or 10 ,
The two-way communication system, wherein the luminescent substance is a substance that develops electroluminescence. In any one of Claims 8 thru | or 11 ,
Two-way communication system in which a luminance correction corresponding to the transmittance of the display means, the correction means for performing a correction of subtracting the reflection of light emitted from the display unit, characterized in that provided in the imaging unit. A bidirectional communication system in which both senders and receivers can communicate with each other by wired or wireless while viewing images of the other party on the display screen,
And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a pair of translucent electrodes, and self-luminous pixels having translucency are arranged adjacent to each other on a translucent substrate,
The imaging means is capable of imaging a subject through the light-transmitting self-luminous pixel , and displays a call destination image on the display means, and at the same time capable of imaging the subject. Is provided on at least one of the sender and receiver sides. A bidirectional communication system in which both senders and receivers can communicate with each other by wired or wireless while viewing images of the other party on the display screen,
And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light-emitting substance interposed between a pair of light-transmitting electrodes, and a light-emitting element having a light-transmitting property is disposed adjacent to the light-transmitting substrate .
The imaging means is capable of imaging a subject through the translucent light emitting element , and displays a call destination image on the display means, and at the same time, a display device with an imaging function capable of imaging the subject. A two-way communication system, which is provided on at least one side of a sender / receiver. A bidirectional communication system in which both senders and receivers can communicate with each other by wired or wireless while viewing images of the other party on the display screen,
And Table shows means,
Imaging means provided on one side of the display means,
The display means includes a light emitting element interposed between a pair of electrodes and a light emitting element capable of transmitting external light adjacent to the light transmitting substrate.
Of the pair of electrodes, one electrode has a light-transmitting property, and the other electrode has a metal material having a thickness capable of transmitting visible light,
The imaging unit is capable of imaging a subject through a light-emitting element that can transmit the external light, and displays a call destination image on the display unit, and at the same time, a display device with an imaging function capable of imaging the subject. The bidirectional communication system is provided on at least one side of the sender / receiver. In claim 14 or 15 ,
The two-way communication system, wherein the luminescent substance is a substance that develops electroluminescence. In any one of Claims 13 thru | or 16 ,
Two-way communication system in which a luminance correction corresponding to the transmittance of the display means, the correction means for performing a correction of subtracting the reflection of light emitted from the display unit, characterized in that provided in the imaging unit. In any one of Claims 13 thru | or 17 ,
An interactive communication system characterized in that an image , characters, figures, and symbols of the subject can be displayed on the display screen.

Images