KR20130036677A - Two way display device and method for displaying thereof - Google Patents

Abstract

PURPOSE: A double sided display device and a displaying method thereof are provided to allow users to watch the same or different images in multiple directions using one display device. CONSTITUTION: At least one image is received(S1210). A mixed image, in which a first image and a second image are mixed, is generated(S1220). The first image is outputted in a first direction of a display device. The second image is outputted in the second direction of the display device(S1240). [Reference numerals] (AA) Start; (BB) End; (S1210) Receiving image data; (S1220) Generating a mixed data in which a first image and a second image are mixed; (S1230) Generating a reverse mixed image by reversing the right and left of the second image arranged on an even line among the mixed images; (S1240) Outputting the reverse mixed image(outputting the first image through a first display screen and outputting the reversed second image through a second display screen);

Description

Two-way display device and method for displaying approx}

The present invention relates to a display device, and more particularly, to a double-sided display device and a display method thereof capable of viewing a normal image on both sides of the display device.

Organic Light Emitting Diode (hereinafter referred to as OLED) sms The electrons and holes are injected into the light emitting layer from the electron injection electrode (cathode electrode) and the hole injection electrode (anode electrode), respectively. It is a device that emits light when the combined exciton falls from the excited state to the ground state.

Due to this principle, unlike LCD, which is conventionally used as a thin display device, it does not require a separate light source, and thus has the advantage of reducing the volume and weight of the device. As a result, it is emerging as a next-generation display device. Accordingly, such OLED displays are being applied to small-sized electronic products requiring high definition, such as mobile communication terminals, personal digital assistants (PDAs), camcorders, and digital cameras. In addition, since the manufacturing process is relatively simple and the production cost is significantly lower than that of the existing LCD, it is expected that the LCD will be replaced by most display devices.

According to the size of these OLEDs, various driving methods are used. Typically, medium- and large-sized OLED displays have an active matrix driving method (AM method), and active matrix driving methods and passive (Passive) methods in small OLED displays. ) Matrix driving method (PM method) is used in combination.

Referring to the display device in more detail, as shown in FIG. 1, the transparent first electrode 20, the organic emission layer 30, and the opaque second layer are disposed on the substrate 10 to be used as the display surface on which light is emitted. The electrode 40 is formed to form a basic light emitting device, and a protective cap 60 having an absorbent 50 for protecting the organic light emitting layer 30 which is weak to moisture is fixed by an adhesive.

In such a display device, an electrode formed on either the front or the rear is composed of a transparent electrode, and an electrode formed on the other is composed of an opaque electrode to emit light of the organic material to only one side.

That is, conventionally, due to the characteristics of the display device, the user can watch an image only in one direction of the module. As a result, the user can only watch the image in one direction of the display device.

In an embodiment according to the present invention, a double-sided display device for viewing an image on both sides of the display device is provided.

In addition, in an embodiment according to the present invention, to provide a double-sided display device and a display method thereof so that a normal image can be viewed instead of the reversed image in both directions of the display device.

 Technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above are clearly understood by those skilled in the art to which the embodiments proposed from the following description belong. Could be.

According to an embodiment of the present invention, a display method of a double-sided display device includes: receiving at least one image; Generating a mixed image in which a first image and a second image are mixed using the received at least one image; And outputting the first image in a first direction of the display apparatus and outputting the second image in a second direction of the display apparatus.

In addition, the double-sided display device includes a display panel including a first display screen formed on the first surface and a second display screen formed on the second surface; An image receiver configured to receive an image to be displayed on the display panel; A mixed image generator configured to generate a mixed image in which a first image and a second image are mixed using at least one image received through the image receiving unit; And provide the generated mixed image to the display panel, thereby outputting a first image included in the mixed image to the first display screen, and outputting the second image to the second display screen. It includes a control unit.

According to an embodiment of the present invention, by using one display device, the same image or different images can be viewed in a plurality of directions, respectively, and the screen size appears when viewing a plurality of images by using a conventional PIP or POP function. You can solve the problem.

In addition, by outputting an inverted image in which the left and right are inverted to the rear of the display apparatus, viewers watching the rear side may also view a normal image.

In addition, since the plurality of electrodes constituting the display element are all transparent, the display device can be used as a mirror in a state where no image is output.

1 is a view showing a display device according to the prior art.
2 and 3 are views for explaining the configuration of the display panel according to an embodiment of the present invention.
4 is a diagram illustrating a configuration of a display apparatus according to an exemplary embodiment of the present invention.
FIG. 5 is a detailed configuration diagram of the control unit shown in FIG. 4.
6 and 7 are views for explaining a viewing method of a double-sided display device according to an embodiment of the present invention.
8 through 11 are diagrams for describing an image processing process, according to an exemplary embodiment.
12 is a flowchart illustrating a step-by-step display method of the double-sided display device according to an embodiment of the present invention.

Hereinafter, a transparent display device according to the present invention will be described in detail with reference to the accompanying drawings.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. The terms may be used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The term and / or may include a combination of a plurality of related items or any item of a plurality of related items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

2 and 3 are views for explaining the configuration of the display panel according to an embodiment of the present invention.

Referring to FIG. 2, the double-sided display apparatus according to the present invention may include a display panel 100.

The display panel 100 outputs an image to the front of the screen as light is transmitted in both directions, and also outputs the image to the rear of the screen.

For example, the first user 200 positioned at the front of the display panel 100 may watch an image displayed at the front of the display panel 100. In addition, at the same time, the second user 300 positioned opposite to the first user 200, that is, the second user 300 positioned at the rear of the display panel 100, is located at the rear of the display panel 10. You can watch the video displayed on.

Such a display panel 100 may be an organic light emitting diode (OLED) or the like.

The OLED may be driven in a passive matrix manner, and the light transmittance may be sufficiently high since the TFT is not required, and the OLED may be used as the display panel 100.

Alternatively, as in an active matrix OLED, even in the case of using a TFT, when the TFT is manufactured using a transparent material such as a multi-composition oxide semiconductor, it is possible to sufficiently increase the light transmissivity.

Referring to FIG. 3, an example of a cross section of a display panel 100 using an OLED is disclosed.

Referring to FIG. 3, the transparent display panel 100 includes a first transparent substrate 110, a second transparent substrate 120, a first transparent substrate 110, and a second transparent substrate 120. ) Between the image layer 130, the first polarization filter 140 formed on the first transparent substrate 110, and the second polarization filter 150 formed on the second transparent substrate 120. Include.

The image layer 130 positioned between the first transparent substrate 110 and the second transparent substrate 120 may be referred to as an organic cell.

Here, the first transparent substrate 110 and the second transparent substrate 120 may have a property of transmitting light.

The image layer 130 may include an anode 131, a hole transport layer 132, an emission layer 133, an electron transport layer 134, and a cathode 135. Can be.

Here, when a voltage is applied to the cathode 135 and the anode 131, a gradation current is supplied, and electrons generated from the cathode 135 move to the emission layer 133 through the electron transport layer 134.

In addition, holes generated from the anode 131 move to the light emitting layer 133 through the hole transport layer 132.

In this case, in the emission layer 133, electrons supplied from the electron transport layer 134 and holes supplied from the hole transport layer 132 collide with each other to recombine. Light is generated in the light emitting layer 133 by the collision of electrons and holes.

The brightness of the light generated in the light emitting layer 133 may be proportional to the magnitude of the gradation current supplied to the anode 131.

In this structure, when light is generated in the light emitting layer 133, light may be emitted toward the first transparent substrate 110 or light may be emitted toward the second transparent substrate 120.

In this case, both the anode 131 and the cathode 132 are formed of a transparent material, and thus light generated in the light emitting layer 133 is transmitted to both the first transparent substrate 110 and the second transparent substrate 120. To be possible.

Accordingly, the user may view the image even through the first transparent substrate 110, or may view the image through the second transparent substrate 120.

A first polarization filter 110 having a first polarization direction is formed on the first transparent substrate 110, and a second polarization filter 120 having a second polarization direction is formed on the second transparent substrate 120. do.

The first polarization filter 110 and the second polarization filter 120 may have the same polarization direction. Alternatively, a non-transparent material may be formed on the odd line or the even line to block the output of the image.

The first and second polarization filters 110 and 120 may use a film-type patterned retarder (FPR) film attached to a display device to display a stereoscopic image.

In addition, in the above description, although the display panel 100 includes the first transparent substrate 110 and the second transparent substrate 120, the first transparent substrate 110 and the second transparent substrate 120 may be different from each other. Ordinary substrates may be used.

3 illustrates an example of the display panel 100, and the present invention is not limited to FIG. 3.

4 is a diagram illustrating a configuration of a display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the display device includes a tuner 110, a demodulator 120, an external device interface 130, a network interface 140, a storage 150, a user input interface 160, The controller 170, the voice output unit 180, and the display panel 100 described above are included.

The tuner 110 selects an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal.

For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the selected RF broadcast signal is an analog broadcast signal, it is converted into an analog baseband image or voice signal (CVBS / SIF). That is, the tuner 110 may process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal CVBS / SIF output from the tuner 110 may be directly input to the controller 170.

Also, the tuner 110 can receive RF carrier signals of a single carrier according to an Advanced Television System Committee (ATSC) scheme or RF carriers of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Meanwhile, the tuner 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna and converts them into intermediate frequency signals or baseband video or audio signals. I can convert it. In this case, although the tuner 110 is illustrated as being configured in one drawing, a plurality of tuners 110 may be configured to receive rf broadcast signals transmitted through different channels at the same time.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation.

For example, when the digital IF signal output from the tuner 110 is an ATSC scheme, the demodulator 120 performs 7-VSB (7-Vestigal Side Band) demodulation. Also, the demodulation unit 120 may perform channel decoding. To this end, the demodulator 120 includes a trellis decoder, a de-interleaver, and a reed solomon decoder to perform trellis decoding, deinterleaving, Solomon decoding can be performed.

For example, when the digital IF signal output from the tuner 110 is a DVB scheme, the demodulator 120 performs COFDMA (Coded Orthogonal Frequency Division Modulation) demodulation. Also, the demodulation unit 120 may perform channel decoding. For this, the demodulator 120 may include a convolution decoder, a deinterleaver, and a reed-solomon decoder to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulation unit 120 may perform demodulation and channel decoding, and then output a stream signal TS. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The demodulator 120 can be provided separately according to the ATSC system and the DVB system. That is, it can be provided as an ATSC demodulation unit and a DVB demodulation unit.

The stream signal output from the demodulator 120 may be input to the controller 170. After performing demultiplexing, image / audio signal processing, and the like, the controller 170 outputs an image to the display panel 100 and outputs an audio to the audio output unit 180.

The external device interface unit 130 may transmit or receive data with the connected external device. To this end, the external device interface unit 130 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 130 may be connected to the external device 190 such as a digital versatile disk (DVD), a Blu-ray, a game device, a camera, a camcorder, a computer (laptop), or the like by wire or wireless. . The external device interface unit 130 transmits an image, audio or data signal input from the outside to the controller 170 through the connected external device 190. In addition, the controller 170 may output an image, audio, or data signal processed by the controller 170 to a connected external device. To this end, the external device interface unit 130 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The network interface unit 140 provides an interface for connecting to a wired / wireless network including an internet network. The network interface unit 140 may include an Ethernet terminal for connection with a wired network, and for connection with a wireless network, a WLAN (Wi-Fi) or a Wibro (Wireless). Broadband, Wimax (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA) communication standards, and the like may be used.

The network interface unit 140 may receive content or data provided by the Internet or a content provider or a network operator through a network. That is, it can receive contents and related information such as movies, advertisements, games, VOD, broadcasting signals, etc., provided from the Internet, a content provider, and the like through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received. It may also transmit data to the Internet or content provider or network operator.

In addition, the network interface unit 140 is connected to, for example, an Internet Protocol (IP) TV, and receives the video, audio, or data signals processed by the set-top box for IPTV so as to enable bidirectional communication. The signal processed by the controller 170 may be transmitted to the set-top box for the IPTV.

The storage unit 150 may store a program for processing and controlling each signal in the controller 170, or may store a signal-processed video, audio, or data signal.

In addition, the storage unit 150 may perform a function for temporarily storing an image, audio, or data signal input to the external device interface unit 130. In addition, the storage unit 150 may store information about a predetermined broadcast channel through a channel storage function such as a channel map.

The storage unit 150 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg, SD or XD memory), It may include at least one type of storage medium such as RAM, ROM (EEPROM, etc.).

4 illustrates an embodiment in which the storage unit 150 is provided separately from the control unit 170, but the scope of the present invention is not limited thereto. That is, the storage unit 150 may be included in the control unit 170.

The user input interface unit 160 transmits a signal input by the user to the controller 170 or transmits a signal from the controller 170 to the user.

For example, the user input interface unit 160 may be configured such as power on / off, channel selection, screen setting, etc. from a remote control device according to various communication methods such as an RF (Radio Frequency) communication method and an infrared (IR) communication method. The user input signal may be received or a signal from the controller 170 may be transmitted to the remote controller.

In addition, the user input interface unit 160 may transmit a user input signal input from a sensing unit (not shown) that senses a user's gesture to the controller 170 or may transmit a signal from the controller 170 to the sensing unit ( (Not shown). Here, the sensing unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, and the like.

The controller 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner 110, the demodulator 120, or the external device interface unit 130, and outputs a video or audio signal. You can create and output.

The image signal processed by the controller 170 may be input to the display panel 100 and displayed as an image corresponding to the image signal. In addition, the image signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

The voice signal processed by the controller 170 may be sound output to the voice output unit 180. In addition, the voice signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

In addition, the controller 170 may control overall operations of the double-sided display device. For example, the controller 170 may control the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 170 may control the duplex display apparatus by a user command or an internal program input through the user input interface unit 160.

In particular, the controller 170 may use the images provided through the tuner 110, the network interface unit 140, the external device interface unit 130, and the storage unit 150, and include a mixed image including a plurality of images. Create

In this case, the controller 170 may generate the mixed image by overlapping and mixing the same image. Alternatively, the controller 170 may generate the mixed image by mixing a plurality of different images.

Thereafter, the controller 170 generates an inverted mixed image in which only the images included in the even lines are inverted left and right in the generated mixed image. This is to output a normal image which is not reversed later from the rear of the display device.

The display panel 100 converts an image signal, a data signal, an OSD signal, a control signal, or an image signal, a data signal, a control signal received from the external device interface unit 130 processed by the controller 170, and a driving signal. Create In particular, the display panel 100 forms a first display screen on a first side (front side) and a second display screen on a second side (back side).

In this case, the display panel 100 may be divided into an additional display method and a single display method.

In the standalone display method, a normal image may be realized by the display panel 180 alone without an additional display, for example, glasses.

On the other hand, the additional display method, it is possible to implement a normal image by using an additional display in addition to the display panel 100. The additional display may be polarized glasses.

The voice output unit 180 receives a signal processed by the controller 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs the voice. The voice output unit 180 may be implemented by various types of speakers.

On the other hand, a block diagram of the double-sided display device shown in Figure 4 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the double-sided display apparatus 100 that is actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

Hereinafter, an image display process of the double-sided display device configured as described above will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 5, the control unit 170 according to an embodiment of the present invention may include a demultiplexer 210, an image processor 220, an OSD generator 240, a mixer 245, and frame rate conversion. The unit 250 and the formatter 260 may be included. In addition, the audio processor 230 and a data processor may be further included.

The demultiplexer 210 demultiplexes an input stream. For example, when an MPEG-2 TS is input, it may be demultiplexed and separated into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer 210 may be a stream signal output from the tuner 110, the demodulator 120, or the external device interface unit 130.

The image processor 220 may perform image processing of the demultiplexed image signal. To this end, the image processor 220 may include an image decoder 225 and a scaler 235.

The image decoder 225 decodes the demultiplexed image signal, and the scaler 235 performs scaling to output the resolution of the decoded image signal on the display 180.

The video decoder 225 may include a decoder of various standards. For example, the image decoder 225 may include at least one of an MPEG-2 decoder, an H.264 decoder, an MPEC-C decoder (MPEC-C part 3), an MVC decoder, and an FTV decoder.

The scaler 235 generates a mixed image in which a plurality of images are mixed using the images to display the images on both sides.

That is, the scaler 235 mixes the images for each line, and mixes the first image to be displayed on the first display screen of the display panel 100 and the second image to be displayed on the second display screen. Create This will be described in more detail below.

The OSD generator 240 generates an OSD signal according to a user input or itself. For example, a signal for displaying various types of information on a screen of the display panel 100 as a graphic or text may be generated based on a user input signal. The generated OSD signal may include various data such as a user interface screen, various menu screens, widgets, and icons.

The mixer 245 may mix the OSD signal generated by the OSD generator 240 and the decoded image signal processed by the image processor 220. The mixed video signal is provided to the frame rate converter 250.

The frame rate converter 250 converts the frame rate of the input video. For example, a 60Hz frame rate is converted to 120Hz or 240Hz. When converting a frame rate of 60 Hz to 120 Hz, it is possible to insert the same first frame or insert a third frame predicted from the first frame and the second frame between the first frame and the second frame. When converting a frame rate of 60 Hz to 240 Hz, it is possible to insert three more identical frames or three predicted frames.

The frame rate converter 250 may output the input frame rate as it is without additional frame rate conversion.

The formatter 260 receives the mixed signal, that is, the OSD signal and the decoded image signal, from the mixer 245 and inverts the image formed on the even lines left and right, so that only the image formed on the even lines is included. Produces a mixed image that is inverted left and right. In this case, the formatter 260 may be referred to as an inverted mixed image generator.

6 is a view for explaining a viewing method of a double-sided display device according to a first embodiment of the present invention.

Referring to FIG. 6, the double-sided display device may further include an additional device for selectively viewing only the image corresponding to the corresponding direction among the mixed image mixed as described above, more preferably, the reverse mixed image in which the even lines are inverted left and right. Can be. In this case, the additional device may include a first polarizing glasses 610 and a second polarizing glasses 620.

The first and second polarization glasses 610 and 620 are required when the first polarization filter 140 and the second polarization filter 150 included in the display panel 100 have a specific polarization direction.

In general, any one of the first and second polarizing glasses 610 and 620 required for viewing a stereoscopic image includes a third polarizing filter for selectively accepting only a left eye image formed in an odd line in the displayed mixed image; And a fourth polarizing filter for selectively receiving only the right eye image formed on the even lines.

However, in the exemplary embodiment of the present invention, the first polarized glasses 610 are attached to the first polarized glasses 610 by attaching only a third polarized filter for selectively accepting only images corresponding to odd lines among the mixed images. The final image combining the image formed on the odd line is output to the user wearing the.

On the contrary, only the fourth polarization filter is attached to the second polarizing glasses 620 to selectively receive only the image corresponding to the even lines among the mixed images, so that the even number of users may wear the second polarizing glasses 620. The final image combined with the image formed on the line is output.

Since the principles of the first polarizing glasses 610, the second polarizing glasses 620, and the principles of the polarizing filters are well known in the art, a detailed description thereof will be omitted. However, in the past, a polarizing filter for the left eye and a polarizing filter for the right eye were respectively attached to one polarizing glasses, but in the present invention, only the left polarizing filter is attached to one polarizing glasses and only the right polarizing filter is attached to the other polarizing glasses. .

7 is a view for explaining a viewing method of a double-sided display device according to a second embodiment of the present invention.

Referring to FIG. 7, in the first polarization filter 140 attached to the first surface of the display panel 100, a transmission material for transmitting an image is formed on an Nth line, and an image is output on an N + 1th line. An impermeable material is formed to block this. It is preferable that said N is odd.

In other words, an odd line 141 of the first polarization filter 140 is formed with a transmission material for transmitting an image corresponding to the odd line of the mixed image, and the even line 142 is an even line of the mixed image. A non-transparent material is formed to block the output of the image corresponding to.

Accordingly, through the first polarization filter 140 as described above, the final image combining only the image formed on the odd line among the mixed images is output.

On the contrary, referring to FIG. 7, in the second polarization filter 150 attached to the second surface of the display panel 100, a transmissive material is formed on an N + 1th line to transmit an image, and on the Nth line. An impermeable material is formed to block the output of the image. It is preferable that said N is odd.

In other words, an odd line 151 of the second polarization filter 150 is formed with a non-transparent material for blocking output of an image corresponding to the odd line of the mixed image, and the even line 152 has the mixed image. A transmissive material is formed for transmitting the image corresponding to the even lines of.

Accordingly, through the second polarization filter 150 as described above, the final image combining only the image formed on the even lines among the mixed images is output.

Hereinafter, the mixed image generation process, the inverted mixed image generation process, and the final image output process will be described in more detail.

8 to 11 are views for explaining an image processing process according to an exemplary embodiment of the present invention, and FIG. 12 is a flowchart for explaining a display method of a double-sided display apparatus according to an exemplary embodiment of the present invention step by step.

8 to 11, a display method of the double-sided display device illustrated in FIG. 12 will be described.

Referring to FIG. 12, first, an image to be output through the display panel 100 is received (step 1210).

In this case, in operation 1210, only one image may be received through any one means of the tuner 110, the external device interface unit 130, the network interface unit 140, and the storage unit 150. Alternatively, a plurality of images may be received through a plurality of means.

That is, in order to output the same image through the first display screen and the second display screen of the double-sided display device, only one image is received in step 1210, and different images are output through the first and second display screens, respectively. To do so, a plurality of images are received in step 1210.

Referring to FIG. 8, in operation 1210, only (a) the image 810 may be received, and (b) only the image 820 may be received. Alternatively, (a) the image 810 and (b) All the images 820 may be received. Hereinafter, a case of receiving only the (a) image 810 or receiving both the (a) image 810 and (b) the image 820 will be described as an example.

Next, when an image is received as described above, a mixed image in which a first image and a second image are mixed is generated using the received image (step 1220).

In the above, when only (a) the image 810 is received, the first image to be displayed on the first display screen and the second image to be displayed on the second display screen using the received (a) image 810. Create a mixed image in which two images are mixed.

In this case, the mixed image is formed by mixing the first image and the second image for each line. In other words, an image corresponding to a specific line of the first image is disposed on odd lines of the mixed image, and an image corresponding to a specific line of the second image is disposed on even lines of the mixed image.

In addition, when generating a mixed image using only one image as described above, the mixed image is generated by overlapping the single image by line.

For example, when the received image has three lines, as shown in FIG. 9 (a), the image corresponding to the first line of the received image is the first line and the first image of the mixed image. 2 lines are placed. Thereafter, an image corresponding to the second line of the received image is disposed on the third line and the fourth line of the mixed image. Similarly, the image corresponding to the third line of the received image is disposed on the fifth and sixth lines of the mixed image, and the first mixed image 910 arranged as described above is generated. Accordingly, when the received image has three lines, the mixed image is six lines, which is twice the received image.

In contrast, in the case where the mixed image is generated using the (a) image 810 and the (b) image 820, as shown in (b) of FIG. 9, first, the (a) image 810 An image corresponding to the first line is disposed on the first line of the mixed image, and (b) an image corresponding to the first line of the image 820 is disposed on the second line of the mixed image. Similarly, (a) an image corresponding to the second and third lines of the image 810 is disposed on the third line and the fifth line of the mixed image, respectively, and (b) the second and the third line of the image 820. An image corresponding to the third line is disposed on the fourth and sixth lines of the mixed image, and the second mixed image 920 arranged as described above is generated.

In other words, the image to be displayed on the first display screen per line is disposed on odd lines of the mixed image, and the image to be displayed on the second display screen is disposed on even lines of the mixed image.

When the mixed image is generated as described above, an inverted mixed image in which left and right of an image formed on a specific line is inverted is generated (operation 1230).

That is, when the first mixed image is generated in operation 1220, the image 1011 disposed on the odd line of the first mixed image is maintained in the original state, and the image 1012 disposed on the even line is applied to the image 1012. The arranged image 1012 inverts the left and right, thereby generating the first inverted mixed image 1010 in which only the image arranged on the even line is inverted left and right.

In addition, when the second mixed image is generated in operation 1220, the image 1021 disposed on the odd line of the second mixed image may be kept in the original state, and the image 1022 disposed on the even line may be Inverting the left and right, thereby generating a second inverted mixed image 1020 in which only the images arranged on the even lines are inverted.

In other words, since the second image displayed through the rear surface of the double-sided display device displays an abnormal image in which the left and right sides are reversed, the image corresponding to the even lines to be displayed through the rear surface is inverted from side to side, so that the final image is reversed. To be reversed and output.

In operation 1240, the first inverted mixed image 1010 or the second inverted mixed image 1020 generated as described above is output.

In other words, when the first inverted mixed image 1010 is output, only the image 1110 corresponding to the odd line of the first inverted mixed image 1010 is output through the front side of the double-sided display device, and the rear side is displayed. Only an image 1120 corresponding to an even line of the first inverted mixed image 1010 is output through the image. In this case, the image 1110 displayed through the front surface of the received image (a) is displayed as it is, the image 1120 displayed through the rear surface (a) the left and right of the image 810 is inverted The reversed image is displayed. That is, since the reversed image is displayed as described above, the user located at the rear of the display apparatus can normally watch the original image in which the reversed image is reversed.

In addition, when the second inverted mixed image 1020 is output, only an image 1130 corresponding to an odd line of the second inverted mixed image 1020 is output through the front side of the double-sided display device, and through the rear side. Only outputs the image 1140 corresponding to the even line of the second inverted mixed image 1020. In this case, the image 1130 displayed through the front surface of the received image (a) is displayed as it is, the image 1120 displayed through the rear surface (b) the left and right of the image 820 is inverted The reversed image is displayed. That is, since the reversed image is displayed as described above, the user located at the rear of the display apparatus can normally watch the original image in which the reversed image is reversed.

According to the embodiment of the present invention as described above, by providing a double-sided display device, by using one display device, it is possible to watch the same image or different images in a plurality of directions, respectively, the existing PIP or POP function This can solve the screen size problem that appears when viewing a plurality of images.

In addition, by outputting an inverted image in which the left and right are inverted to the rear of the display device, viewers viewing the rear surface can also view the normal image.

In addition, since the plurality of electrodes constituting the display element are all transparent, the display device can be used as a mirror in a state where no image is output.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

Claims (18)

Receiving at least one image;
Generating a mixed image in which a first image and a second image are mixed using the received at least one image; And
And outputting the first image in a first direction of the display apparatus and outputting the second image in a second direction of the display apparatus. The method of claim 1,
And the mixed image is generated using one image corresponding to the same channel or a plurality of images corresponding to different channels. The method of claim 1,
And displaying different images corresponding to the same channel or different images corresponding to different channels in the first and second directions of the display apparatus. The method of claim 2,
The mixed image is an image obtained by mixing the one or a plurality of images for each line.
The first image is formed on odd lines of the mixed image, and the second image is formed on even lines of the mixed image. The method of claim 2,
And generating an inverted mixed image inverting the generated mixed image. 6. The method of claim 5,
Generating the inverted mixed image,
Selectively inverting only images formed on even lines from the mixed image,
And the inverted image is a second image to be output in a second direction of the display apparatus. 6. The method of claim 5,
The outputting step,
Outputting the first image in a first direction of the display apparatus;
And outputting an inverted image in which the second image is inverted left and right in the second direction of the display apparatus. 8. The method of claim 7,
A first polarizing filter is attached to the first surface of the display device, a second polarizing filter is attached to the display method of the two-sided display device. The method of claim 8,
A non-transparent material is formed in the first polarization filter at a position corresponding to the even lines of the mixed image.
And a non-transparent material is formed in the second polarizing filter corresponding to the odd lines of the mixed image. A display panel including a first display screen formed on the first surface and a second display screen formed on the second surface;
An image receiver configured to receive an image to be displayed on the display panel;
A mixed image generator configured to generate a mixed image in which a first image and a second image are mixed using at least one image received through the image receiving unit; And
Providing the generated mixed image to the display panel, thereby outputting a first image included in the mixed image to the first display screen, and controlling the second image to be output to the second display screen Duplex display device including a control unit. The method of claim 10,
The mixed image generator,
And duplex mixing the one image received through the image receiving unit for each line to generate the mixed image. The method of claim 10,
Wherein the image receiver comprises:
First and second image receiving unit for receiving images of different channels, respectively,
The mixed image generator,
And a first image and a second image received through the first and second image receivers, for each line to generate the mixed image. The method of claim 10, wherein
The first image is disposed on an odd line of the mixed image,
And a second image disposed on even lines of the mixed image. The method of claim 13,
And a reverse mixed image generator configured to store the mixed image generated by the mixed image generator and generate an inverted mixed image in which left and right inverted second images formed on even lines are stored from the stored mixed image. The method of claim 14,
And a second image inverted left and right through the inverted mixed image unit on a second display screen of the display panel. The method of claim 14,
The first surface is the front of the display device,
And the second surface is a rear surface of the display device. The method of claim 13,
The display panel includes:
A first polarizing filter attached to the first surface;
And a second polarization filter attached to the second surface. 18. The method of claim 17,
A non-transparent material is formed in the first polarization filter at a position corresponding to the even lines of the mixed image.
And a non-transparent material formed on the second polarization filter corresponding to the odd lines of the mixed image.

Images