KR20130064155A - Display apparatus for stereo-scopic image including parallax barrier and mobile terminal including the same - Google Patents

Abstract

By placing a light emitting element in front of the light-blocking portion of the parallax barrier, it compensates for the reduction in brightness due to the barrier, improves current consumption and contrast, as well as stereoscopic images using the parallax barrier to solve the problem of reduced resolution. Display device. A display device according to a first embodiment disclosed in the present specification includes a display panel; And a mask configured to alternately arrange a light transmitting part and a light blocking part so that the viewer's left and right eyes see different pixels on the display panel, thereby causing a stereoscopic effect due to binocular disparity, and the light blocking part of the mask. It includes a parallax barrier including a light emitting element disposed in front.

Description

Display Apparatus For Stereo-Scopic Image Including Parallax Barrier And Mobile terminal Including The Same}

The present invention relates to a stereoscopic image display device having a parallax barrier and a mobile terminal having the display device.

A terminal can be divided into a mobile or portable terminal and a stationary terminal depending on whether the terminal is movable or not. The mobile terminal may be further classified into a handheld terminal and a vehicle mount terminal according to whether a user can directly carry it.

As the functions of such terminals are diversified, they are implemented in the form of a multimedia player having complex functions such as photographing and photographing of movies, reproduction of music and video files, games, and broadcasting reception . Further, in order to support and enhance the function of the terminal, it may be considered to improve the structural and software parts of the terminal.

On the other hand, various methods have been proposed for the technology related to the stereoscopic image display apparatus using binocular disparity. One of the typical methods is to install a lenticular lens or a parallax barrier at a predetermined distance on a two-dimensional image panel so that different image information can be recognized on both left and right sides of the viewer to have a three-dimensional effect. to be.

A stereoscopic image display device using a lenticular lens arranges left and right images in a stripe shape on the focal plane of a lens called a lenticular screen having a semi-cylindrical shape. Make the video visible. The width of one lens is determined by the width of the pixel of the indicator, which allows two pixels corresponding to the left and right images to enter. In this case, the pixel effect on the left side of the lens is visible only to the right eye, and the pixel on the right side is visible only to the left eye, thereby separating the left and right images.

A stereoscopic image display apparatus using a parallax barrier is a technique of arranging thin stripe-shaped vertical slits for transmitting or blocking light at regular intervals, and then alternately arranging left and right images at appropriate intervals before or after them. Therefore, when viewed through this slit at a specific point in time, the left and right images are geometrically separated to feel a three-dimensional effect. In other words, by installing a striped parallax barrier that functions as a special glasses in front of the monitor screen, the user can recognize the stereoscopic image without wearing glasses.

The present invention is to solve such a problem, by arranging the light emitting element in front of the light blocking portion of the parallax barrier, to compensate for the reduction in brightness due to the barrier, as well as to improve the power consumption and contrast, as well as to reduce the resolution It is a technical problem to provide a stereoscopic image display apparatus using a parallax barrier for solving the problem.

In addition, the present invention is to solve such a problem, by arranging the light emitting element in front of the light blocking portion of the parallax barrier, to compensate for the reduction in brightness due to the barrier, as well as to improve the current consumption and contrast (contrast) It is a technical object of the present invention to provide a mobile terminal including a stereoscopic image display apparatus using a parallax barrier for solving a problem of lowering the resolution.

According to an aspect of the present invention, there is provided a display apparatus including a display panel; And a mask configured to alternately arrange a light transmitting part and a light blocking part so that the viewer's left and right eyes see different pixels on the display panel, thereby causing a stereoscopic effect due to binocular disparity, and the light blocking part of the mask. It includes a parallax barrier including a light emitting element disposed in front.

On the other hand, the mobile terminal according to the second embodiment disclosed herein for solving the other technical problem is a display panel; And a mask configured to alternately arrange a light transmitting part and a light blocking part so that the viewer's left and right eyes see different pixels on the display panel, thereby causing a stereoscopic effect due to binocular disparity, and the light blocking part of the mask. The display unit may include a parallax barrier including a light emitting device disposed at a front side thereof.

According to the present invention, by controlling the brightness of the light emitting device to gray tone, it is possible to increase the brightness of the three-dimensional image display that the user experiences. In addition, according to the present invention, by controlling the brightness of the light emitting device in units of pixels, current consumption improvement and contrast improvement, such as local dimming, may be obtained. In addition, according to the present invention, by controlling the color of the light emitting device it is possible to improve the resolution degradation due to the barrier.

1 is a block diagram illustrating a mobile terminal 100 according to the present invention.
2A and 2B are perspective views showing the appearance of a mobile terminal 100 according to the present invention.
3 is a schematic diagram of a stereoscopic image display apparatus using a parallax barrier method according to the prior art.
4 is a schematic diagram of a parallax barrier according to the prior art.
5 is a schematic diagram of a stereoscopic image display apparatus using a parallax barrier method according to an embodiment of the present invention.
6 is a schematic configuration diagram of a stereoscopic image display device having a parallax barrier according to the present invention.
7A is a conceptual diagram illustrating an operation example of a stereoscopic image display device having a parallax barrier according to the present invention.
7B is a conceptual diagram illustrating another operation example of a stereoscopic image display device having a parallax barrier according to the present invention.
8 is a flowchart illustrating an operation control process of the display apparatus according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigator, have. However, it should be understood that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless it is applicable only to a mobile terminal. It will be easy to see.

Description of FIGS. 1 to 2B? General description of the mobile terminal

1 is a block diagram illustrating a mobile terminal 100 according to the present invention. 1, a mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, A controller 160, an interface unit 170, a controller 180, and a power supply unit 190. The components shown in Fig. 1 are not essential, so that a mobile terminal having more or fewer components can be implemented.

Hereinafter, the components 110 to 190 of the mobile terminal 100 will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, and a location information module 115.

The broadcast receiving module 111 receives broadcast signals and broadcast related information from an external broadcast management server through a broadcast channel. Here, the broadcast-related information means information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast-related information can also be provided through a mobile communication network. In this case, the broadcast-related information may be received by the mobile communication module 112. The broadcast signal and the broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. Such wireless signals may include various types of data depending on a voice call signal, a video call signal, a text message, or a multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be embedded in the mobile terminal 100 or externally. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used.

The position information module 115 is a module for acquiring the position of the mobile terminal 100, and a representative example thereof is a Global Position System (GPS) module.

1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal and a video signal, and may include a camera 121, a microphone 122, and the like. The camera 121 processes image frames such as still images and moving images obtained by the image sensor in the video communication mode or the photographing mode. The image frame processed by the camera 121 can be displayed on the display unit 151. [ The image frame may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ More than two cameras 121 may be provided depending on the use environment.

The microphone 122 processes the sound signal input from the outside in the communication mode, the recording mode, the voice selection mode, and the like as electrical voice data. The voice data processed by the microphone 122 in the communication mode can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 and output. The microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated when an external sound signal is input.

The user input unit 130 generates input data for controlling the operation of the mobile terminal 100 by a user. The user input unit 130 may include a key pad, a dome switch, a touch pad (static pressure and static electricity), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as presence or absence of a user, the open / close state of the mobile terminal 100, position, orientation, acceleration, deceleration, And generates a sensing signal. For example, when the mobile terminal 100 is in the form of a slide phone, the sensing unit 140 may detect whether the slide phone is opened or closed. The sensing unit 140 may sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like.

The sensing unit 140 may include a proximity sensor 141. The sensing unit 140 may include a touch sensor (not shown) for sensing a touch operation with respect to the display unit 151.

The touch sensor may have the form of a touch film, a touch sheet, a touch pad, or the like. The touch sensor may be configured to convert a pressure applied to a specific portion of the display portion 151 or a change in capacitance generated at a specific portion of the display portion 151 into an electrical input signal. The touch sensor may be configured to detect a touch pressure as well as a touched position and area.

When the touch sensor and the display unit 151 have a mutual layer structure, the display unit 151 can be used as an input device in addition to the output device. The display unit 151 may be referred to as a 'touch screen'.

If there is a touch input via the touch screen, signals corresponding thereto are sent to a touch controller (not shown). The touch controller processes the signals transmitted from the touch sensor, and then transmits data corresponding to the processed signals to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched.

In the case where the touch screen is electrostatic, it can be configured to detect the proximity of the sensing object by a change of the electric field along the proximity of the sensing target. Such a touch screen may be classified as proximity sensor 141. [

The proximity sensor 141 refers to a sensor that detects the presence or absence of an object to be sensed without mechanical contact using an electromagnetic force or infrared rays. The proximity sensor 141 has a longer life than the contact type sensor and its utilization is also high. Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor.

Hereinafter, for convenience of explanation, a proximity action is referred to as " proximity touch " while an object to be sensed does not touch the touch screen, and an action of touching the sensing object on the touch screen is called & touch ".

The proximity sensor 141 detects the presence or absence of a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, The information corresponding to the presence / absence of proximity touch and the proximity touch pattern can be output to the touch screen.

The output unit 150 generates an output related to visual, auditory, tactile, and the like. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal 100 operates in the call mode, the display unit 151 displays a UI (User Interface) or a GUI (Graphic User Interface) related to the call. When the mobile terminal 100 operates in the video communication mode or the photographing mode, the display unit 151 displays the photographed image, the received image, the UI, the GUI, and the like.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT-LCD), an organic light emitting diode (OLED), a flexible display display, a 3D display, and an e-ink display.

At least one display (or display element) included in the display unit 151 may be configured to be transparent or light transmissive so that the display can see the outside through it. This can be referred to as a transparent display. A typical example of such a transparent display is TOLED (Transparent OLED). The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 in the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. [ For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from each other or positioned integrally with one another, and may be located on different surfaces.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice selection mode, a broadcast reception mode, and the like. The sound output module 152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events generated in the mobile terminal 100 include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying occurrence of an event by vibration, in addition to a video signal or an audio signal. Since the video signal or the audio signal may also be output through the display unit 151 or the audio output module 152, the display unit 151 and the audio output module 152 may be classified as part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 154. The intensity, pattern, and the like of the vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through the jetting or suction port, grazing to the skin surface, contact of the electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects due to endothermic or reproducing a sense of cold using a heat generating element.

The haptic module 154 may not only deliver a haptic effect through direct contact, but may also be configured to allow the user to feel the haptic effect through a muscle sense such as a finger or an arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input and output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data related to vibrations and sounds of various patterns that are output upon touch input on the touch screen.

The memory 160 may be a flash memory, a hard disk, a multimedia card micro type, a card type memory (e.g., SD or XD memory), a random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM) And may include at least one storage medium. The mobile terminal 100 may operate in association with a web storage that performs storage functions of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, the interface unit 170 may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, Input / output ports, video I / O ports, earphone ports, and the like.

The identification module is a chip for storing various information for authenticating the usage right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module Universal Subscriber Identity Module (USIM)). A device equipped with an identification module (hereinafter referred to as "identification device") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit 170 may be a path through which the power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle or various command signals input from the cradle by the user, (Not shown). The various command signals or power supplied from the cradle may also act as a signal for recognizing that the mobile terminal 100 is correctly mounted in the cradle.

The controller 180 controls the overall operation of the mobile terminal 100. For example, control and processing related to voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [ The control unit 180 may perform pattern selection processing for selecting handwriting input and drawing input on the touch screen as characters and images, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

The various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be applied to various types of application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays Microprocessors, microprocessors, and other electronic units for performing other functions, as will be appreciated by those skilled in the art. In some cases, the embodiments described herein may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code may be implemented in a software application written in a suitable programming language. Such software code may be stored in the memory 160 and executed by the controller 180.

Hereinafter, a method of processing user input to the mobile terminal 100 will be described.

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100, and may include a plurality of operation units. The operating units may also be referred to as manipulating portions and may be employed in any manner as long as they are operated in a tactile manner by the user's tactile sense.

Various kinds of time information can be displayed on the display unit 151. [ Such visual information can be displayed in the form of letters, numbers, symbols, graphics, icons, and the like, and can be formed as a three-dimensional stereoscopic image. At least one of a character, a number, a symbol, a graphic, and an icon may be displayed in a predetermined arrangement for inputting time information, thereby being implemented as a keypad. Such a keypad may be referred to as a so-called " soft key ".

The display unit 151 may operate as an entire area or may be divided into a plurality of areas and operated. In the latter case, the plurality of areas can be configured to operate in association with one another. For example, an output window and an input window may be displayed on the upper and lower portions of the display unit 151, respectively. The output window and the input window are areas allocated for outputting or inputting information, respectively. In the input window, a soft key with a number for inputting a telephone number may be output. When the soft key is touched, the number corresponding to the touched soft key is displayed in the output window. When the operating unit is operated, a call connection to the telephone number displayed in the output window may be attempted, or the text displayed in the output window may be entered into the application.

The display unit 151 or the touch pad may be configured to detect touch scrolling. The user can move the cursor or the pointer positioned on the displayed object, for example, the icon, on the display unit 151 by scrolling the display unit 151 or the touch pad. Further, when the finger is moved on the display unit 151 or the touch pad, the path along which the finger moves may be visually displayed on the display unit 151. [ This will be useful for editing the image displayed on the display unit 151. [

One function of the mobile terminal 100 may be executed in response to a case where the display unit 151 and the touch pad are touched together within a predetermined time range. In the case of being touched together, there may be a case where the user clamps the main body of the mobile terminal 100 using the thumb and index finger. At this time, one function of the mobile terminal 100 to be executed may be activation or deactivation for the display unit 151 or the touch pad, for example.

2A and 2B are perspective views showing an appearance of a mobile terminal 100 according to the present invention. FIG. 2A shows a front side and one side of the mobile terminal 100, and FIG. 2B shows a rear side and the other side of the mobile terminal 100. FIG.

Referring to FIG. 2A, the mobile terminal 100 includes a bar-shaped terminal body. However, the mobile terminal 100 is not limited thereto, and may be realized in various forms such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are movably coupled to each other.

The terminal body includes a case (a casing, a housing, a cover, and the like) that forms an appearance. In the embodiment, the case may be divided into a front case 101 and a rear case 102. A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injection molding of a synthetic resin or may be formed to have a metal material such as stainless steel (STS), titanium (Ti) or the like.

The display unit 151, the sound output unit 152, the camera 121, the user input unit 130 (see FIG. 1), the microphone 122, the interface 170, can do.

The display unit 151 occupies a main portion of the front case 101. [ The audio output unit 152 and the camera 121 are located in a region adjacent to one end of the display unit 151 and the first user input unit 131 and the microphone 122 are located in a region adjacent to the other end. The second user input unit 132 and the interface 170 may be located on the sides of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100. [ The user input unit 130 may include a plurality of operation units 131 and 132.

The first or second operating units 131 and 132 can receive various commands. For example, the first operation unit 131 can receive commands such as start, end, scroll, and the like. The second operation unit 132 can receive commands such as adjusting the size of the sound output from the sound output unit 152, switching to the touch selection mode of the display unit 151, and the like.

Referring to FIG. 2B, a rear camera 121 'may be additionally mounted on the rear surface of the terminal body, that is, the rear case 102. The rear camera 121 'has a photographing direction opposite to that of the front camera 121 (see FIG. 2A), and may be configured to have pixels different from those of the front camera 121.

For example, the front camera 121 may be configured to have a low pixel, and the rear camera 121 'may be configured to have a high pixel. Accordingly, when the front camera 121 is used during a video call, the size of the transmission data may be reduced when the user's face is photographed and transmitted to the counterpart in real time. On the other hand, the rear camera 121 'can be used for the purpose of storing a high-quality image.

Meanwhile, the cameras 121 and 121 'may be installed in the terminal body so as to be rotated or popped up.

The flash 123 and the mirror 124 may be further positioned adjacent to the rear camera 121 '. The flash 123 emits light toward the subject when the user photographs the subject with the rear camera 121 '. The mirror 124 illuminates the user's face when the user photographs himself (self-photographing) using the rear camera 121 '.

A rear sound output unit 152 'may be additionally disposed on the rear surface of the terminal body. The rear sound output unit 152 ′ may perform a stereo function together with the front sound output unit 152 (see FIG. 2A), and may perform a speakerphone function during a call.

In addition to the antenna for communication, an antenna 116 for receiving broadcast signals may be additionally provided on the side surface of the terminal body. The antenna 116 constituting a part of the broadcast receiving module 111 (see FIG. 1) can be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the mobile terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the main body of the terminal or may be detachable from the outside of the main body of the terminal.

The rear case 102 may further include a touch pad 135 for sensing a touch. The touch pad 135 may be of a light transmission type like the display unit 151 (see FIG. 2A). In addition, a rear display unit for outputting visual information may be additionally mounted on the touch pad 135. In this case, information output from both the front display unit 151 and the rear display unit may be controlled by the touch pad 135.

The touch pad 135 operates in correlation with the display unit 151. [ The touch pad 135 may be located parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

Hereinafter, a display apparatus according to an exemplary embodiment disclosed herein will be described. The following display apparatus may be implemented as the display unit 151 of the mobile terminal 100.

3 is a schematic diagram of a stereoscopic image display apparatus using a parallax barrier method according to the prior art.

The stereoscopic image display device illustrated in FIG. 3 includes a display panel 200 and a parallax barrier 300. The parallax barrier 300 is disposed to successively alternate the light blocking unit 310 and the light transmitting unit 320, and the parallax barrier 300 is disposed in front of the display panel 200. The display panel 200 includes a right eye image pixel 210 that provides an image of a right eye and a left eye image pixel 220 that provides an image of a left eye. The viewer sees an image displayed on the display panel 200 through the light transmitting part 320 of the barrier 300. The left eye and the right eye see another area of the display panel 200 even though the same light transmitting part 320 passes through the same. do. That is, the viewer may feel a stereoscopic feeling by viewing different images displayed on the left eye image pixel and the right eye image pixel through the light transmitting unit 320, respectively.

4 is a schematic diagram of a parallax barrier according to the prior art. In the parallax barrier 300 illustrated in FIG. 4, the light blocking unit 310 and the light transmitting unit 320 are alternately arranged alternately in a vertical stripe shape. The parallax barrier 300 illustrated in FIG. 4 is a two-view parallax barrier having the same width of the light blocking unit 310 and the light transmitting unit 320.

When the display device is set to view a stereoscopic image, the light blocking unit 310 blocks light to provide a viewer with a stereoscopic effect according to binocular parallax. However, in the case where the stereoscopic image is set not to be viewed, the light blocking unit 310 provides the same environment as that of the display which enables to view only the general image, for example, because the light is blocked by being rotated by 90 degrees.

Due to the operation of the parallax barrier as described above, a decrease in transmittance by the light blocking unit 310 may occur. As a result, the brightness of the display panel 200 drops to 50% as compared with the case of viewing a normal image instead of a stereoscopic image, and a resolution decrease occurs. In addition, as the user views the image with reduced brightness and contrast, the user may feel less stereoscopic feeling and increase eye fatigue. In addition, there is a disadvantage that the current consumption may be increased by increasing the brightness of backlights to compensate for the brightness of the display panel 200.

5 is a schematic diagram of a stereoscopic image display apparatus using a parallax barrier method according to an embodiment of the present invention.

The stereoscopic image display device illustrated in FIG. 5 includes a display panel 200 and a parallax barrier 300. The parallax barrier 300 is disposed to successively alternate the light blocking unit 310 and the light transmitting unit 320, and the parallax barrier 300 is disposed in front of the display panel 200. The display panel 200 includes a right eye image pixel 210 that provides an image of a right eye and a left eye image pixel 220 that provides an image of a left eye. Here, the parallax barrier 300 further includes a light emitting device disposed in front of the light blocking unit 310. The light emitting device may completely cover the light blocking unit 310 of the parallax barrier 300 so that the light blocking unit 310 is not exposed to the observer's view. In addition, the light emitting device may cover only the light blocking part 310 of the parallax barrier 300 so that the observer's view toward the light transmitting part 320 may not be disturbed by the light emitting device.

The light emitting device may be set to emit light only when the display device is set to watch a stereoscopic image. That is, when the display apparatus is set to watch a general image instead of a stereoscopic image, the display apparatus may be set not to emit light. In addition, the light emitting device may be a light emitting device having a fixed brightness and color or a light emitting device having a changed brightness or color. In addition, the light emitting device may emit light with a color lighter than that of the light blocking unit 310. For example, when the light blocking unit 310 is black, the light emitting device may emit light of gray color.

6 is a schematic configuration diagram of a stereoscopic image display device having a parallax barrier according to the present invention.

Referring to FIG. 6, the stereoscopic image display apparatus includes a display panel driver 250, a display panel 200, a barrier driver 350, and a parallax barrier 300.

The display panel driver 250 controls the display panel 200 to display a stereoscopic image signal appropriately in the form of the parallax barrier 300. The display panel driver 250 controls the display panel driver 250 to display a stereoscopic image image at any point of time through the light transmitting unit 320.

The display panel 200 displays a stereoscopic image signal of multiple views under the control of the display panel driver 250. In this case, the display panel 200 may be a flat panel display panel, for example, a liquid crystal display, a plasma display, an OLED display, or the like.

The barrier driver 350 controls the driving of the parallax barrier 300 when a request for switching from the normal image mode to the stereoscopic image mode occurs or vice versa. That is, when a request for switching from the normal image mode to the stereoscopic image mode occurs, the barrier driver 350 blocks the light by the light blocking unit 310 so that the user's left and right eyes see different images. It causes the three-dimensional effect by parallax. On the contrary, when a request for switching from the stereoscopic image mode to the normal image mode occurs, the barrier driver 350 does not block the light by the light blocking unit 310 so that the left and right eyes of the user see the same image. Do not cause three-dimensional effect caused by parallax.

The parallax barrier 300 includes a light transmitting part 320 and a light blocking part 310 to selectively transmit a stereoscopic image displayed on the display panel 200. The light transmitting part 320 and the light blocking part 310 are repeatedly arranged alternately with each other.

In the parallax barrier 300 included in the display device according to an exemplary embodiment of the present disclosure, the light transmitting part 320 and the light blocking part 310 are alternately arranged, and the observer is disposed through the light blocking part 310. A left eye and a right eye each have a different pixel to cause a stereoscopic effect due to binocular parallax, and a light emitting element 330 disposed in front of the light blocking unit 310 of the mask.

In addition, the barrier driver 350 controls the brightness or the color of the light emitting device 330. In addition, the barrier driver 350 may control the brightness of the light emitting device 330 in gray tones. Accordingly, the observer's perceived brightness with respect to the display panel 200 may be increased. In addition, the barrier driving unit 350 may control the color of the light emitting device 330 to improve the resolution degradation due to the light blocking unit 310.

In addition, the barrier driver 350 may control the brightness or the color of the light emitting device 330 in units of pixels. When the brightness is controlled on a pixel-by-pixel basis, a similar effect to local dimming may be obtained by dividing the backlight unit into a plurality of regions and processing luminance (brightness) in association with an image signal. Accordingly, the current consumption can be improved and there is an advantage of contrast improvement. In addition, when the color is controlled in units of pixels, the resolution degradation due to the light blocking unit 310 may be improved.

In addition, the barrier driver 350 may control the brightness or color of the light emitting device 330 to be an intermediate value of adjacent pixels on the display panel 200 corresponding to the light emitting device 330. To this end, the display panel driver 250 may output brightness or color information of adjacent pixels on the display panel 200 corresponding to the light emitting device 330 to the barrier driver 350. In addition, the barrier driver 350 controls the brightness or the color of the light emitting device 300 in units of pixels based on the brightness or the color information of the adjacent pixels output from the display panel driver 250, and then displays the display panel driver 250. Outputs the adjusted brightness or color information of the light emitting device 330, and the display panel driver 250 again controls the brightness and contrast of the display panel 200 based on the adjusted brightness or color information of the light emitting device 330. (contrast) or resolution can be compensated.

Hereinafter, an embodiment in which the brightness or the color of the light emitting device is controlled in units of pixels will be described in more detail with reference to FIGS. 7A and 7B.

7A is a conceptual diagram illustrating an operation example of a stereoscopic image display device having a parallax barrier according to the present invention.

Referring to FIG. 7A, reference numeral 200 schematically shows a display panel, and reference numeral 300 schematically shows a parallax barrier. The display panel 200 is divided into a grid in units of pixels, and pixels corresponding to the left image and pixels corresponding to the right image are alternately arranged in succession. The parallax barrier 300 includes a mask in which the light blocking unit 310 and the light transmitting unit 320 are alternately and continuously arranged as described above. In the parallax barrier 300, a light emitting device 332 which is controllable in units of pixels is disposed in front of the mask.

The viewer's left eye sees the L1 pixel on the display panel 200 through the adjacent light transmissive region 322 of the light emitting element 332, and the display panel (through the other adjacent light transmissive region 324 of the light emitting element 332). You will see the L2 pixel on 200). In addition, the observer's right eye sees the R1 pixel on the display panel 200 through the adjacent light transmissive region 322 of the light emitting element 332 and displays it through the other adjacent light transmissive region 324 of the light emitting element 332. You see the R2 pixel on the panel 200. Thus, adjacent pixels corresponding to the light emitting element 332 are L1 pixels, L2 pixels, R1 pixels, and R2 pixels.

The display panel driver 250 outputs brightness or color information of the adjacent pixels L1, L2, R1, and R2 to the barrier driver 350. The barrier driver 350 determines brightness or color information of the light emitting device 332 by referring to brightness or color information of the adjacent pixels L1, L2, R1, and R2. Brightness or color information of the light emitting device 332 may be determined as in Equation 1 below.

Here, w1, w2, w3, and w4 are weights, which are determined by the type of content displayed on the display panel 200, the position of the viewer's left and right eyes, or the position of adjacent pixels on the display panel 200. Can be. The sum of the weights may be 1, for example, when w1 = w2 = w3 = w4 = 0.25, the light emitting element 332 takes an intermediate value of brightness or color of adjacent pixels L1, L2, R1, and R2. Done.

7B is a conceptual diagram illustrating another operation example of a stereoscopic image display device having a parallax barrier according to the present invention.

Adjacent pixels corresponding to the light emitting element 332 include L1 pixels, L2 pixels, R1 pixels, and R2 pixels. To further expand this, the adjacent pixels corresponding to the light emitting element 332 may further include L0 and R0 pixels adjacent to the L1 and R1 pixels, and L3 and R3 pixels adjacent to the L2 and R2 pixels.

The display panel driver 250 outputs brightness or color information of the adjacent pixels L0 to L3 and R0 to R3 to the barrier driver 350. The barrier driver 350 determines brightness or color information of the light emitting device 332 with reference to the brightness or color information of the adjacent pixels L0 to L3 and R0 to R3. Brightness or color information of the light emitting device 332 may be determined as in Equation 1 below.

Here, W0 to W7 are weights and may be determined according to the type of content displayed on the display panel 200, the position of the left and right eyes of the observer, or the position of the adjacent pixels on the display panel 200. The sum of the weights may be equal to 1, for example, when w0 = w1 = w2 = w3 = w4 = w5 = w6 = w7 = 0.125, the light emitting element 332 may be configured to include adjacent pixels L0 to L3 and R0 to R3. It takes the middle value of brightness or color.

8 is a flowchart illustrating an operation control process of the display apparatus according to the present invention.

The display apparatus performs operation S110 of operating a stereoscopic image display. Accordingly, the light blocking unit 310 is driven to cause a three-dimensional effect by allowing the observer's left and right eyes to see different images.

Subsequently, the display apparatus acquires brightness or color of adjacent pixels on the display panel 200 corresponding to each light emitting device 330 (S120). As described above, the adjacent pixels may be pixels that may be viewed by an observer through the light transmitting region adjacent to the light emitting element 330, or pixels further including adjacent pixels.

Subsequently, the display apparatus calculates an optimal brightness, contrast, or resolution of the light emitting device 330 based on the brightness or color of adjacent pixels (S130). That is, the display apparatus determines the weight described above, and weights the weight according to the type of content displayed on the display panel 200, the position of the left and right eyes of the observer or the position of the adjacent pixels on the display panel 200. You can decide.

Subsequently, the display apparatus controls the brightness or the color of the light emitting device 330 based on the calculated brightness, contrast, or resolution (S140). The display apparatus controls the brightness or the color of the light emitting device 330 based on the brightness or the color of the adjacent pixels obtained in operation 120 and the weight determined in operation 130.

Subsequently, the display apparatus compensates for the brightness, the color, or the resolution of the display panel 200 by using the result of adjusting the brightness or the color (S150). As the brightness or color of the light emitting device 330 is adjusted, the observer may feel that the original image displayed by the entire display panel 200 is manipulated. Therefore, the display device may reproduce the feeling of the original image by compensating for the brightness, color, or resolution of the display panel 200 using the result of adjusting the brightness or color.

As such, the embodiments described above are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Mobile terminal: 100

Claims (11)

Display panel; And
The light transmitting part and the light blocking part are arranged alternately, and the mask which causes the viewer's left and right eyes to see different pixels on the display panel to cause a stereoscopic effect due to binocular disparity, and the front of the light blocking part of the mask And a parallax barrier comprising a light emitting element disposed in the display device. The display apparatus of claim 1, further comprising a barrier driver configured to control the brightness or the color of the light emitting device. The method of claim 2, wherein the barrier driving unit,
And a brightness of the light emitting device in gray tones. The method of claim 2, wherein the barrier driving unit,
Display device, characterized in that for controlling the brightness or color of the light emitting element in units of pixels. The method of claim 4, wherein the barrier driving unit,
And controlling the brightness or color of the light emitting device to be an intermediate value of adjacent pixels on the display panel corresponding to the light emitting device. The method of claim 5, wherein the median value,
And a display device according to the type of content displayed on the display panel. The method of claim 5, wherein the median value,
And a display device according to positions of the observer's left and right eyes. The method of claim 5, wherein the median value,
And a display device according to the position of the adjacent pixels. The display apparatus of claim 5, further comprising a display panel driver configured to output brightness or colors of adjacent pixels on the display panel corresponding to the light emitting element to the barrier driver. The method of claim 9, wherein the barrier driving unit,
Outputting the adjusted brightness or color of the light emitting device to the display panel driver;
The display panel driver,
And compensates for the brightness, contrast or resolution of the display panel based on the adjusted brightness or color of the light emitting device. In a mobile terminal having a display unit,
The display unit includes:
Display panel; And
The light transmitting part and the light blocking part are arranged alternately, and the mask which causes the viewer's left and right eyes to see different pixels on the display panel to cause a stereoscopic effect due to binocular disparity, and the front of the light blocking part of the mask A mobile terminal comprising a parallax barrier including a light emitting element disposed in the.

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