Patent Application
20130169770
This application claims priority from Korean Patent Application No. 10-2012-0000059, filed on Jan. 2, 2012 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
1. Field
Apparatuses consistent with exemplary embodiments relate to a security display apparatus, and more particularly to a security display apparatus which provides a secured image using a display apparatus capable of realizing a three-dimensional image.
2. Description of the Related Art
Generally, in the use of a display apparatus in a public place, people within a visible distance can see content displayed on a screen, bringing up the issue of invasion of privacy. Infringement of privacy is even more serious in display apparatuses used in public institutions for immigration inspections at airports or for an identity check.
In this respect, a display apparatus is required to have a secured display function.
One illustrative example of a display apparatus having a secured display function is an apparatus provided with an encoding/decoding function used to present a secured image. The display apparatus includes a display outputting an encoded image and exclusive glasses decoding the encoded image into a visible image.
The display apparatus with this configuration enables a user wearing the exclusive glasses to watch the secured image output from the display but presents an unrecognizable image to a user with the naked eye, thereby maintaining security.
However, such a display apparatus requires an encoding function embedded in the display and include the exclusive glasses having a decoding function, thus complicating the configuration and causing increase in product costs.
Further, as one illustrative example of a liquid crystal display (LCD) having a secured display function, there is a display apparatus having a structure in which a polarizing plate serving as an analyzer is omitted from a pair of polarizing plates disposed to face each other with an LCD panel interposed therebetween.
In this case, when watching an image displayed in the display apparatus, a user not wearing polarizing glasses sees a white screen but only a user wearing polarizing glasses serving as an analyzer can watch effective images, thereby maintaining security.
However, since the display apparatus does not include a polarizing plate for an analyzer, which is an essential component, a user inconveniently must wear the polarizing glasses even to watch images when security is not needed. Further, since the display apparatus involves a modification to a basic structure, such a configuration is not applied to display apparatuses already being used. In addition, the display apparatus allows a user wearing glasses with mere polarizing properties, such as sunglasses, to see content, thus providing lax security.
Accordingly, one or more exemplary embodiments provide a security display apparatus which is constructed to provide a secured image viewable only by a user wearing glasses with predetermined settings using a display apparatus capable of realizing a 3D image.
A security display apparatus according to an aspect of an exemplary embodiment permits a user to view a secured image using general glasses without involving a change to essential components or using exclusive glasses with a decoding function. Accordingly, the security display apparatus may have a compact structure and reduced manufacturing costs as compared with a conventional security display apparatus.
The above and/or other exemplary aspects and advantages will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings, in which:
Below, exemplary embodiments will be described in detail with reference to accompanying drawings so as to be easily realized by a person having ordinary knowledge in the art. One of skill in the art would understand that exemplary embodiments may be embodied in various forms without being limited to the embodiments specifically set forth herein. Descriptions of well-known parts are omitted for clarity and conciseness, and like reference numerals refer to like elements throughout.
Referring to
The present embodiment is described with respect to a display apparatus that realizes a 3D image using active shutter glasses as an illustrative example. In this case, shutter glasses 200 are provided as the 3D glasses.
The display 100 displays a 3D image including a left-eye image and a right-eye image. The display 100 displays left-eye and right-eye images in different spatially frames, and a user wearing the shutter glasses 200 may visually recognize separate images as 3D images by a left shutter 221 and a right shutter 225 opening and closing.
The display 100 includes an image signal reception unit 110 receiving an image signal from an image source, an image processor 120 processing a received image signal, a display unit 130 displaying an image, and a light receiving and emitting unit 140 receiving and emitting light for a control signal from and to a peripheral device.
The display 100 may be configured as a portable device which receives a 3D image signal from an image source and displays the signal, e.g., a television, a monitor, and a mobile phone.
The image processor 120 reverses a normal image input to realize a secured image to generate a reverse image. The reverse image may be generated by any one of an image board, a traffic control board (T-con board) and a logic board, which constitute the image processor 120, reversing the normal image with respect to a contrast ratio. Here, the input normal image is a two-dimensional (2D) image which is not divided into left-eye and right-eye images, different from in realizing a 3D image.
Further, the image processor 120 outputs one of a left-eye image and a right-eye image as a normal image and outputs the other thereof as a reverse image. For example, the image processor 120 outputs a left-eye image as the normal image, and a right-eye image as the reverse image.
The display unit 130 displays an image based on an image signal processed by the image processor 120. The display unit 130 may include a liquid crystal display (LCD) panel including a liquid crystal layer, an organic light emitting diode (OLED) display including a light emitting layer of an organic material and a plasma display panel (PDP), and a panel driver driving these panels.
The light receiving and emitting unit 140 generates light for a synchronizing signal and irradiates the light to the shutter glasses 200 so that the left shutter 221 and the right shutter 225 of the shutter glasses 200 open and close in synchronization with an image displayed on the display unit 130. Also, the light receiving and emitting unit 140 receives light for a control signal from the wireless control device 300.
The wireless control device 30 includes a device body 310 and a signal transmission unit 320 installed in the device body 310 and transmitting a control signal to the light receiving and emitting unit 140 of the display 100. Further, the wireless control device 300 may include a controller 350 controlling the signal transmission unit 320 and a battery unit 360 supplying electric power to the wireless control device 300. Here, the signal transmission unit 320 may include an infrared transmitter transmitting infrared light to perform infrared communication with the light receiving and emitting unit 140.
The shutter glasses 200 include a glasses body 210 and the left and right shutters 221 and 225 installed in the glasses body 210 and opening and closing in synchronization with left-eye and right-eye images displayed on the display 100. Further, the shutter glasses 200 may further include a mode setting unit 225 to set an image among left-eye and right-eye images for each of the left shutter 221 and the right shutter 225 to synchronize with to open and close.
Generally, to watch 3D images, the mode setting unit 229 sets the left shutter 221 to synchronize with a left-eye image and the right shutter 225 to synchronize with a right-eye image. In this case, the left shutter 221 is shut when a right-eye image is displayed on the display 100, and it transmits an image when a left-eye image is displayed. That is, the left shutter 221 blocks a right-eye image and transmits a left-eye image. The right shutter 225 operates in the other way. That is, the right shutter 225 blocks a left-eye image and transmits a right-eye image.
Further, in order to realize a secured display, the shutter glasses 200 as the 3D glasses filter a reverse image to view a normal image among images displayed on the display unit 130. To this end, the shutter glasses 200 are set by the mode setting unit 229 so that both the left shutter 221 and the right shutter 25 transmit only an image providing a normal image (left-eye image in
The shutter glasses 200 include a light receiving unit 230, an optical element 240, and a controller 250 controlling these components, which are installed in the glasses body 210, in addition to the glasses body 210 and the left and right shutters 221 and 225. Moreover, the shutter glasses 200 may include a shutter driver 220 driving the left and right shutters 221 and 225 and a battery unit 260.
The light receiving unit 230 receives light for a control signal irradiated from the display 100, converts the light into a control signal, and outputs the signal to the shutter driver 220. Here, the control signal may be a synchronizing signal for controlling the left and right shutters 221 and 225. The light receiving unit 230 includes a light receiving element 231 receiving incident light and a light collecting lens 235 collecting light entering the light receiving element 231. Here, the light receiving element 231 may include an infrared receiver receiving infrared light in a range of 790 to 890 nm.
The shutter driver 220 performs auto gain control on an input synchronizing signal to drive the left shutter 221 and the right shutter 225. The shutter driver 220 divides the synchronizing signal, delays divided synchronizing signals, or changes a phase of a signal. The left shutter 221 and the right shutter 225 may be provided as liquid crystal shutter glasses and open and close by drive of the shutter driver 220.
Hereinafter, a process of the security display apparatus realizing a secured image is described with reference to the drawings.
Referring to
Here, the normal image and the reverse image as the left-eye image and the right-eye image, respectively, may be configured in any one mode of 3D display modes. That is, the normal image and the reverse image may be realized as the left-eye image and the right-eye image in any one mode among a side-by-side mode, a top-and-bottom mode, a checker board mode, and a sequential frame mode.
In this case, a user wearing 3D glasses with settings for both the left shutter 221 and the right shutter 255 to transmit a left-eye image can see the left-eye image N1 as shown in
That is, referring to
Although the security display apparatus described with reference to
For example, shutter glasses as 3D glasses may include a glasses body and left and right shutters installed in the glasses body and opening and closing in synchronization with an image corresponding to a normal image displayed on the display among the left-eye and right-eye images. That is, the shutter glasses may be configured in a structure in which the left and right shutters transmit a normal image only without use of a mode setting unit.
Further, the security display apparatus may include polarizing glasses as 3D glasses. In this case, the display unit further includes a polarizing filter allowing the left-eye image and the right-eye image to have different polarizing properties. Here, the polarizing glasses transmit a certain polarized image corresponding to a normal image displayed on the display among the left-eye image and the right-eye image.
As described above, the security display apparatus according to the present embodiment displays a normal image as one of left-eye and right-eye images and a reverse image as the other thereof, so that only a user wearing 3D glasses enabling both eyes to satisfy requirements for seeing a normal image is allowed to watch a secured image.
Although a few exemplary embodiments have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the inventive concept, the scope of which is defined in the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2012-0000059 | Jan 2012 | KR | national |
