CN103096105A - Multiple-view device and control method, display apparatus and control method, and display system - Google Patents

Abstract

A multi-view device for use with a display device is provided. The apparatus includes: a lens that operates to selectively transmit or block light; a communication unit that communicates with a display device that is displaying a content image; and a controller that receives from the display device via the communication unit a The beacon signal, controls the operation of the glasses based on the received beacon signal, and changes the reception frequency of the beacon signal via the communication unit according to the use time of the multi-view device.

Description

Multi-view device, control method, display device, control method, and display system

technical field

Apparatus and methods consistent with the exemplary embodiments relate to a multi-view device synchronized with a display device displaying content images and a control method thereof, a display device and a control method thereof, and a display system including the display device and the multi-view device, and further Specifically, it relates to a multi-view device and a control method thereof, a display device and a control method thereof, and a display system that improve the operation configuration of the multi-view device and a display device corresponding to display intervals of content images.

Background technique

The display device processes an image signal received from an external image source, and displays an image on a display panel including liquid crystal based on the processed image signal. The display device scans scan lines including image information to the panel to display an image on the panel, and forms a single image frame as the scan lines are sequentially arranged in the panel.

Typically, a single display device displays a single content at any given time, however, depending on the required viewing environment, two-dimensional (2D) or three-dimensional (3D) content images may be displayed, or multiple content images may be provided to multiple users.

In the former case, for example, the viewing angle of each eye of the user is different, thereby enabling the user to recognize a 3D image of an object. Based on such a principle, a display device displays a left-eye image and a right-eye image, respectively, and a user views the left-eye image and the right-eye image through his/her left and right eyes, thereby recognizing a 3D image. In the latter case, for example, a display device respectively displays two or more different content images based on its principle of separately displaying left-eye and right-eye images, and a plurality of users can selectively view some content images, thereby identifying different content images by the user.

As such, in order for a user to view left and right eye images or a plurality of content images of a 3D image displayed in a display device, the display device includes a multi-view device for performing the above. In the case of a display system that displays 3D images, the multi-view device may include 3D glasses that selectively transmit and block light for each eye of the user.

Contents of the invention

The foregoing and/or other aspects may be achieved by providing a multi-view device for use in conjunction with a display device, the multi-view device comprising: a lens operable to selectively transmit or block light; a communication unit with which a content image is being displayed communication with the display device; and a controller that receives a beacon signal synchronized with the display period of the content image from the display device via the communication unit, controls the operation of the lens according to the received beacon signal, and changes the via The frequency at which the communication unit's beacon signal is received.

The controller may control the reception frequency according to a reception rate of the beacon signal in a preset time period, and may determine the reception rate of the beacon signal based on a packet error rate related to reception of the beacon signal via the communication unit.

The controller may increase the receiving frequency of the beacon signal when the packet error rate is greater than a predetermined threshold rate, and may decrease the receiving frequency of the beacon signal when the packet error rate is less than the predetermined threshold rate.

The controller may reduce the receiving frequency of the beacon signal by adjusting the receiving period of the beacon signal to be longer than a default value, and may increase the receiving frequency of the beacon signal by adjusting the receiving period of the beacon signal to be shorter than the default value.

The multi-view device may also include a battery that supplies power to the communication unit, wherein the controller may control the power supplied by the battery to the communication unit to enable or disable the communication unit and thereby control the reception frequency of the beacon signal.

The communication unit may receive beacon signals via radio frequency (RF) wireless communication.

The other aspect can be achieved by providing a display device including: a signal receiver that receives an image signal; a signal processor that processes the received image signal by using a preset image processing operation; a display unit based on The processed image signal displays a content image; a communication unit that communicates with at least one multi-view device that operates in synchronization with a display period of the content image; and a controller that outputs a search signal to search for the at least one multi-view device via the communication unit, and The display period of the content image synchronously transmits a beacon signal to at least one searched multi-view device via the communication unit, and changes the beacon based on a reception rate of a search signal for searching the at least one multi-view device in a preset time period The frequency at which the signal is sent.

If the multi-view device receives the search signal, the controller may receive a response packet in response to the search signal from at least one multi-view device, and if the multi-view device fails to receive the search signal within a preset time period, the controller may receive from at least one multi-view device A multi-view device receives request packets requesting a search signal, and may determine a reception rate based on the received number of response packets and the received number of request packets.

The reception rate may be adjusted in proportion to the received number of response packets and inversely proportional to the received number of request packets.

The controller may decrease the transmission frequency of the beacon signal when it is determined that the reception rate is greater than a predetermined threshold rate, and may increase the transmission frequency of the beacon signal when it is determined that the reception rate is less than the predetermined threshold rate.

The controller may reduce the transmission frequency of the beacon signal by adjusting the transmission period of the beacon signal to be longer than a default value, and may increase the transmission frequency of the beacon signal by adjusting the transmission period of the beacon signal to be shorter than the default value.

The communication unit may transmit the beacon signal via radio frequency (RF) wireless communication.

Another aspect may be achieved by providing a control method of a multi-view device used in conjunction with a display device, the method comprising: receiving from the display device a beacon signal synchronized with a display period of a content image displayed on the display device; The time of use of the view device changes the reception frequency of the beacon signal; and receiving the beacon signal at the changed reception frequency and operating the glasses of the multi-view device according to the received beacon signal.

The changing may include controlling the reception frequency according to a reception rate of the beacon signal in a preset time period, and the reception rate of the beacon signal may be determined based on a packet error rate related to reception of the beacon signal by the multi-view device pair.

The changing the receiving frequency of the beacon signal may include increasing the receiving frequency of the beacon signal if the packet error rate is greater than a predetermined threshold rate, and decreasing the receiving frequency of the beacon signal if the packet error rate is smaller than the predetermined threshold rate.

Increasing the reception frequency of beacon signals if the packet error rate is greater than a predetermined threshold rate may include: adjusting the reception period of beacon signals to be shorter than a default value, and reducing the reception frequency of beacon signals if the packet error rate is less than a predetermined threshold rate It may include: adjusting the receiving period of the beacon signal to be longer than the default value.

Another aspect may be achieved by a control method of a display apparatus, the method including: displaying a content image; outputting a search signal to search for at least one multi-view device operating in synchronization with a display cycle of the content image; changing the reception rate of the search signal for searching at least one multi-view device in the transmission frequency of the beacon signal synchronized with the display period of the content image; and transmitting the beacon signal to the at least one searched multi-view device according to the changed transmission frequency .

The outputting the search signal may include: if the multi-view device receives the search signal, receiving a response packet from at least one multi-view device in response to the search signal, and if the multi-view device fails to receive the search signal within a preset time period, then A request packet requesting a search signal is received, and a reception rate is determined based on the received number of response packets and the received number of request packets.

The reception rate may be adjusted in proportion to the received number of response packets and inversely proportional to the received number of request packets.

The changing the sending frequency of the beacon signal may include: reducing the sending frequency of the beacon signal when the receiving rate is determined to be greater than a predetermined threshold rate, and increasing the sending frequency of the beacon signal when the receiving rate is determined to be lower than the predetermined threshold rate.

If it is determined that the reception rate is greater than the predetermined threshold rate, reducing the transmission frequency of the beacon signal may include: adjusting the transmission period of the beacon signal to be longer than a default value, and if it is determined that the reception rate is less than the predetermined threshold rate, increasing the transmission frequency of the beacon signal may Including: Increase the sending frequency of beacon signals by adjusting the sending period of beacon signals to be shorter than the default value.

Another aspect may be achieved by providing a display system including: a display device that displays a content image; and a multi-view device that operates in synchronization with a display period of the content image, wherein the multi-view device includes: a lens , which operates to selectively transmit or block light; a communication unit, which communicates with the display device which is displaying the content image; and a controller, which receives a beacon signal synchronized with a display period of the content image from the display device via the communication unit, The operation of the lens is controlled according to the received beacon signal, and the reception frequency of the beacon signal is changed based on the reception rate of the beacon signal in a preset time period.

Another aspect may be achieved by providing a display system including: a display device that displays a content image; and at least one multi-view device that operates in synchronization with a display cycle of the content image, wherein the display device includes: A signal receiver that receives an image signal; a signal processor that processes the received image signal by using a preset image processing operation; a display unit that displays a content image based on the processed content image; a communication unit that communicates with the display of the content image at least one multi-view device that operates synchronously in a period communicates; and a controller that outputs a search signal to search for at least one multi-view device via a communication unit, sends to at least one searched multi-view device via a communication unit in synchronization with a display period of a content image The device transmits a beacon signal, and changes the transmission frequency of the beacon signal based on a reception rate of a search signal for searching at least one multi-view device for a preset period of time.

Description of drawings

The above and/or other aspects will become apparent and easier to understand through the following description of exemplary embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 illustrates an example of a display system according to a first exemplary embodiment;

FIG. 2 illustrates an example of a display system according to a second exemplary embodiment;

Fig. 3 is a block diagram of a display device and shutter glasses of the display system shown in Fig. 1;

Fig. 4 illustrates the signal transmission/reception relationship between the display device of Fig. 1 and Fig. 3 and the shutter glasses;

FIG. 5 illustrates a timing sequence in which the shutter glasses of FIGS. 1 and 3 receive a beacon packet from a display device;

FIG. 6 is a flowchart illustrating a control method of the shutter glasses in FIGS. 1 and 3;

7 illustrates a response of shutter glasses to a search signal received from a display device according to a third exemplary embodiment; and

FIG. 8 is a flowchart illustrating a control method of the display device shown in FIG. 7 .

Detailed ways

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings so as to be understood by those of ordinary skill in the art. The exemplary embodiments can be implemented in various forms without being limited to the exemplary embodiments set forth herein. Descriptions of well-known components are omitted for brevity, and like reference numerals refer to like components throughout.

FIG. 1 illustrates an example of a display system 1 according to the first exemplary embodiment.

As shown in the figure, the display system 1 according to the present exemplary embodiment includes: a display device 100 that processes an image signal received from an external source, and displays an image based on the processed image signal; The images displayed in the device 100 operate accordingly.

The multi-view apparatus 200 according to the present exemplary embodiment includes three-dimensional (3D) glasses 200 which selectively transmit or block light if an image displayed on the display apparatus 100 includes a 3D image. However, the inventive concept may be further applied to a case where the multi-view device 200 displays two or more different content images in addition to displaying a 3D image.

The display device 100 receives an image signal from an external image source (not shown). Display device 100 may receive image signals from various image sources including, but not limited to, a host computer including a central processing unit (CPU) (not shown) and a graphics card that generates image signals and locally provides an image signal; a server (not shown) that provides the image signal in a network; and a transmission device (not shown) used in conjunction with a broadcasting station that transmits a broadcast signal via electric waves or cables.

The display device 100 receives a 2D image signal corresponding to a two-dimensional (2D) image, or a 3D image signal corresponding to a 3D image from an external source, processes the 2D or 3D image, and displays the image. Unlike 2D images, 3D images include left-eye image frames intended to be viewed by the user's left eye and right-eye image frames intended to be viewed by the user's right eye. When receiving a 3D image signal, the display apparatus 100 alternately displays a left-eye image frame and a right-eye image frame based on the received 3D image signal.

The 3D glasses 200 may include shutter glasses, for example. If a 3D image is displayed on the display apparatus 100 , the shutter glasses 200 selectively open or block a field of view of the user's left or right eye based on which of the left-eye image frame and the right-eye image frame is currently displayed. Specifically, when a left-eye image frame is displayed in the display device 100 , the shutter glasses 200 open the field of view of the user's left eye and block the field of view of the user's right eye. On the contrary, when the right-eye image frame is displayed in the display apparatus 100 , the shutter glasses 200 open the field of view of the user's right eye and block the field of view of the user's left eye.

In order to ensure the mutual correspondence between the 3D images displayed on the display device 100 and the selective light transmission/blocking of the shutter glasses 200, the display device 100 generates and sends to the shutter glasses 200 a synchronization signal or a beacon signal, which corresponds to the image Display timing of frames. The shutter glasses 200 selectively transmit and block light based on the received beacon signal.

As mentioned above, the display system 1 may include a display device 100 including, but not limited to, a home television (TV). Specifically, in the display system 1 , the display device 100 includes a display panel (not shown) for displaying an image, and sends a beacon signal corresponding to the image to the shutter glasses 200 .

However, the display system 1 is not limited to the exemplary embodiment shown in FIG. 1 .

FIG. 2 illustrates an example of a display system 2 according to the second exemplary embodiment.

As shown in the figure, the display system 2 according to the present exemplary embodiment relates to a theater system such as a movie theater. The display system 2 includes: a display device 101 that displays a large-screen image on a screen S; a beacon signal transmitting device 102 that transmits a beacon signal corresponding to an image displayed by the display device 101; and 3D glasses 201 and 202 that communicate with Beacon signals transmitted by the beacon signal transmitting device 102 operate accordingly.

Similar to that described with reference to the first exemplary embodiment, the display device 101 may include a panel (not shown), and may also employ a projection type device configured to display a large screen and project an image onto the screen S. The projection type display device 101 is well known in the field of image technology, and thus, its detailed description will be omitted.

The beacon signal transmitting device 102 transmits a beacon signal to the outside, which is synchronized with the display timing of the 3D image displayed by the display device 101 . The beacon signal transmitting device 102 can transmit a beacon signal in up to four directions or in a single specific direction, and considering the range in which the display system 2 can be implemented and the transmittable range of a single beacon signal transmitting device 102, it can be implemented in A plurality of beacon signal transmitting devices 102 are provided in a location of .

The beacon signal sending device 102 can communicate with the display device 101 via a wired communication link or a wireless communication link, so that the generated beacon signal corresponds to the real-time display timing of the image.

Similar to the first exemplary embodiment, the 3D glasses 201 and 202 may include shutter glasses, for example. If there are multiple beacon signals in the implementation location, the 3D glasses 201 and 202 receive the beacon signal from the beacon signal transmitting device 102 that is closest to the 3D glasses and thus transmits the clearest beacon signal.

Hereinafter, detailed configurations of the display device 100 and the shutter glasses 200 according to the first exemplary embodiment will be described with reference to FIG. 3 . FIG. 3 is a block diagram of the display device 100 and shutter glasses 200 of the display system shown in FIG. 1 .

As shown in the figure, the display device 100 includes: a signal receiver 110 that receives an image signal; a signal processor 120 that processes the image signal received by the signal receiver 110 by using an image processing operation; a display unit 130 that based on the signal processing The image signal processed by the display device 120 displays an image thereon; the communication unit 140, which communicates with the shutter glasses 200; The beacon signal corresponding to the 3D image.

The shutter glasses 200 include: a glasses communication unit 210 that communicates with the display device 100 and receives a beacon signal from the display device 100; a glass 220 that selectively transmits and blocks light for each of the user's left eye and the user's right eye a battery 230, which supplies power to the components of the shutter glasses 200; and a glasses controller 240, which controls the glasses 220 based on the beacon signal.

Hereinafter, components of the display device 100 will be described.

The signal receiver 110 receives and transmits an image signal and/or image data to the signal processor 120 . The type of components implementing the signal receiver 110 may vary depending on the standard of the received image signal and the implementation type of the display device 100 . For example, signal receiver 110 may receive signals wirelessly from a broadcast station (not shown) via a radio frequency (RF) communication link, or via a radio such as, for example, composite video, component video, super video, SCART, high-definition multimedia interface (HDMI ), DisplayPort, Unified Display Interface (UDI), or a wired implementation of the Wireless High Definition standard to receive image signals. If the image signal includes a broadcast signal, the signal receiver 110 includes a tuner for tuning the broadcast signal by channel. Otherwise, the signal receiver 110 may receive image data packets from a server (not shown) via a network.

The signal processor 120 processes the image signal received via the signal receiver 110 in various possible ways. The signal processor 120 outputs the processed image signal to the display unit 130 to display an image thereon based on the image signal.

The image processing operations of the signal processor 120 may include, but are not limited to, at least one of the following: a decoding operation corresponding to the image format of the image data, a deinterleaving operation for converting the interleaved image data into progressive image data, scaling the image data to a preset Resolution scaling operations, noise reduction operations to improve image quality, detail enhancement operations, and frame refresh rate conversion operations.

The signal processor 120 may be provided as a system on chip (SOC) integrating the above-described operations, or an image processing board (not shown) formed of respective components that perform the above-described operations mounted in a printed circuit board, and installed in the display device 100 .

The display unit 130 displays an image thereon based on the image data received from the signal processor 120 . The display unit 130 may include, but is not limited to, at least one of the following: a liquid crystal display, a plasma display, a light emitting diode, an organic light emitting diode, a surface conduction electron emitter, a carbon nanotube, and a nanocrystal.

Depending on its implementation type, the display unit 130 may also include additional components. For example, if the display unit 130 includes a liquid crystal display, the display unit 130 includes a liquid crystal display (LCD) panel (not shown), a backlight unit (not shown) that emits light to the LCD panel, and a panel driving substrate (not shown) that drives the LCD panel. not shown).

The communication unit 140 transmits the beacon signal from the controller 150 to the shutter glasses 200 . The communication unit 140 is implemented according to an interactive RF wireless communication standard such as RF and Bluetooth, and is used to transmit and receive unrestricted signals and/or information and/or data of various natures, for example included in the display device 100 and the shutter glasses 200 Beacon signals for communication between.

The controller 150 generates a beacon signal synchronized with a timing sequence or a display period of a 3D image displayed on the display unit 130 and transmits the generated beacon signal to the shutter glasses 200 via the communication unit 14 .

Hereinafter, components of the shutter glasses 200 will be described.

The glasses communication unit 210 is implemented according to a communication standard related to the communication unit 140 , and transmits a beacon signal wirelessly received from the communication unit 140 to the glasses controller 240 . The glasses communication unit 210 can transmit data to the communication unit 140 in addition to receiving data from the communication unit 140 , and thus can perform interactive communication with the communication unit 140 .

The lens 220 selectively transmits and blocks light for each eye of the user based on control signals provided by the glasses controller 240 . Since the lens 220 selectively transmits light for each of the user's left eye and the user's right eye, the user can recognize the left-eye image and the image displayed on the display unit 130 with each of his/her left and right eyes, respectively. Right eye image.

The lens 220 may include, but is not limited to, a liquid crystal lens that operates to block light by using a predetermined voltage applied by the glasses controller 240 and to transmit light if the predetermined voltage is not applied. Alternatively, optics 220 may achieve variable light transmission that is dependent on the applied voltage level.

The battery 230 powers the components of the shutter glasses 200 to enable their operation. The battery 230 may comprise a primary cell or a secondary battery, and may preferably comprise a secondary battery chargeable via an external power source. The battery 230 is controlled by the glasses controller 240 so that the power output or the voltage level of the output to particular components can be controlled.

The glasses controller 240 drives the glasses 220 by selectively applying voltage to the glasses 220 based on the beacon signal received by the glasses communication unit 210 . The glasses controller 240 controls the glasses 220 to transmit light to the user's left eye and block light to the user's right eye in a vertical sync region where a left-eye image is displayed. The glasses controller 240 further controls the glass 220 to block light to the user's left eye and transmit light to the user's right eye in a horizontal synchronization area where the right eye image is displayed. The glasses controller 240 further controls the glasses 220 to block light to both eyes of the user when an image is scanned to the display unit 130 . The above description provides an example of controlling the lens 220 through the operation of the glasses controller 240, but does not limit the spirit of the inventive concept.

Hereinafter, a signal transmission/reception process performed between the display device 100 and the shutter glasses 200 for operating the shutter glasses 200 in synchronization with a display cycle of a 3D image displayed in the display device 100 will be described with reference to FIG. 4 . FIG. 4 illustrates a signal transmission/reception relationship between the display device 100 and the shutter glasses 200 .

As shown, the display device 100 and the shutter glasses 200 should be paired or associated with each other such that the shutter glasses 200 receive a beacon signal from the display device 100 and operate correspondingly to the beacon signal.

To associate the display device with the shutter glasses, the user uses the shutter glasses 200 to generate a pairing trigger event (operation 310 ). The trigger event may be generated by performing any one or more of various operations such as, for example, searching the display apparatus 100 within the communication range of the shutter glasses 200 .

The shutter glasses 200 transmit an inquiry packet requesting pairing to the display apparatus 100 (operation 320 ).

Upon receiving the inquiry packet, the display apparatus 100 transmits an inquiry response packet to the shutter glasses 200 in response to the inquiry packet received from the shutter glasses 200 (operation 330 ). The query response packet includes information on the manufacturer of the display device 100 and information on the output level at which the display device 100 transmits the packet.

The shutter glasses 200 complete pairing with the display apparatus 100 by receiving the inquiry response packet from the display apparatus 100 (operation 340 ). In this operation, the shutter glasses 200 may transmit an association notification packet to the display apparatus 100 in response to the receipt of the inquiry response packet, and the display apparatus 100 may then transmit a packet to the shutter glasses 200 in response to the receipt of the association notification packet, thereby completing the pairing.

The association notification packet sent by the shutter glasses 200 to the display apparatus 100 includes address information related to the shutter glasses 200 , the device type of the shutter glasses 200 , battery characteristics, and any other relevant information. The display device 100 and the shutter glasses 200 exchange feature information to complete pairing or association.

If the pairing is completed, the shutter glasses 200 wait for a preset time period from the completion of the pairing to receive a reconnection train packet (operation 350 ). If the reconnect serial packet is not received within a preset period of time, the shutter glasses 200 may transmit a packet requesting transmission of the packet to the display apparatus 100 .

The display apparatus 100 transmits a reconnect serial packet to the shutter glasses 200 (operation 360 ). The reconnect serial packet includes information enabling the shutter glasses 200 to receive the beacon packet. The reconnect serial packet includes the communication clock of the display device 100, the address of the display device 100, and period information related to the beacon packet.

The shutter glasses 200 complete the connection to the display apparatus 100 based on the received reconnection serial grouping information, and perform a synchronization operation corresponding to a display period of an image displayed in the display apparatus 100 (operation 370 ).

Once a reconnection tandem packet is received, the shutter glasses 200 ignore the next reconnection tandem packet. Since the display device 100 periodically transmits the reconnection serial packet at preset time intervals after the pairing is completed, if the shutter glasses 200 desire to reconnect to the display device 100, the shutter glasses 200 may receive the reconnection serial packet again, and execute Reconnection to the display device 100 without additional requests.

Based on the reconnection serial packet information, the shutter glasses 200 receive a beacon packet periodically transmitted from the display apparatus 100 (operation 380 and operation 390 ). The shutter glasses 200 operate the glasses 220 in synchronization with the display period of the 3D image of the display device 100 based on the beacon grouping.

The beacon packet may include, for example, one or more of the following: a display timing of an image based on a communication clock of the display device 100, a delay value with respect to a shutter operation timing of the lens 220 of each eye of the user, a time delay value displayed in the display device 100, The running time of the content image of , and/or the remaining running time calculated based on the current timing of the content image.

With the foregoing configuration, if the display apparatus 100 displays a 3D image having predetermined content, the shutter glasses 200 may operate in synchronization with the 3D image.

The aforementioned exemplary embodiments relate to the display system 1 of FIG. 1 , however the spirit of the inventive concept may be applied to the display system 2 of FIG. 2 . Specifically, the display system 2 may include an additional communication terminal (not shown) for pairing the display device 101 with each of the shutter glasses 201 and 202 .

The communication terminal is separated from the display device 101 to facilitate user access to the shutter glasses 201 and 202 , and the communication terminal stores therein operational characteristic information on the display device 101 to pair the display device 101 with each of the shutter glasses 201 and 202 .

For example, in operation 310, 320, 330, and 340 of FIG. In operations 350 , 360 , 370 , 380 , and 390 , packet transmission and reception may be performed between the display apparatus 101 and the shutter glasses 201 and 202 .

The effect of performing pairing with an additional communication terminal instead of the display device 101 is described below.

In a theater environment such as that shown in FIG. 2, a movie theater may include multiple locations adjacent to each other. Therefore, (i) there are a plurality of display devices 101 each displaying a different image, (ii) each beacon signal transmitting device 102 is installed to transmit a signal or packet corresponding to each of the display devices 101, and (iii) the aforementioned The devices are adjacent to each other.

If pairing is performed by using the beacon signal transmitting device 102, the shutter glasses 201 and 202 may be paired with the display apparatus 101 displaying an image that the user is not currently viewing instead of the display apparatus 101 displaying an image that the user is currently viewing. For example, this may occur when the user is in a corner of a movie theater relatively far from the beacon signal transmitting device 102, or when the signal received from another beacon signal transmitting device 102 placed outside the wall is relatively strong.

Therefore, if pairing is performed by using an additional communication terminal, even if a signal received from another beacon signal transmitting device 102 is relatively strong, the shutter glasses 201 and 202 can selectively receive signals from the corresponding beacon signal transmitting device 102. Reconnect serial packets and beacon packets.

FIG. 5 illustrates an example of timing at which the shutter glasses 200 receive a beacon packet b from the display device 100 .

The upper graph 410 of FIG. 5 is a timing diagram showing that the display device 100 transmits the beacon packet b. The horizontal axis in the figure refers to time. The display apparatus 100 periodically transmits the beacon packet b to the outside at regular preset intervals of time t1.

Since the shutter glasses 200 generally use an internal memory, whether or not the operation of the shutter glasses 200 can be guaranteed during display of content images becomes a problem. In particular, the shutter glasses 200 should minimize the power consumption of the battery 230 so as to maximize the operating time of the shutter glasses 200 .

In order to achieve the above situation, the shutter glasses 200 receive the beacon packet b according to the timing shown in the second graph 420 . The shutter glasses 200 receive the beacon packet b from the display apparatus 100 , but receive the beacon packet b at regular intervals of time t2 longer than the time period t1 (ie, the transmission time period adopted by the display apparatus 100 ). The interval t2 is not limited to a specific number as long as t2 is greater than t1. In some exemplary embodiments, t2 has a default value that is a multiple of t1. For example, if t1 is equal to 80 milliseconds, then t2 may be set to 560 milliseconds, which is seven times as long as t1 .

During the interval t2 measured from the first timing 421 of receiving the first beacon packet b until the second timing 422 of receiving the next beacon packet b, the shutter glasses 200 disable the glasses communication unit 210 by cutting off the power supplied from the battery 230, The glasses communication unit 210 is thereby not allowed to receive the intermediate transmission of the beacon packet b, and operate the glasses 220 based on the information on the first beacon packet b received at the first timing 421 . Such an operation is called a free-run operation.

At the second timing 422, the shutter glasses 200 enable the glasses communication unit 210 to receive the next beacon packet b by allowing power to be supplied from the battery 230, and disable the glasses communication unit 210 after receiving the next beacon packet b, so that Continue to operate mirror 220 in a free-running state.

Specifically, the shutter glasses 200 receive the beacon packet b at an interval t2 longer than t1 (ie, the transmission time period adopted by the display apparatus 100), and disable the glasses communication unit during a part of the interval t2 in which the beacon packet b is not received. 210 in order to save power that would otherwise be provided by the battery 230.

When the shutter glasses 200 receive the beacon packet b, depending on the usage environment of the display systems 1 and 2, the reception environment related to the beacon packet b may change.

If the glasses communication unit 210 operates based on an RF wireless communication standard such as Bluetooth, there may be various external devices using the same or similar wireless communication standard as the above wireless communication standard within the usage environment of the display systems 1 and 2 . The presence of external devices may cause congestion or interference with respect to wireless communications. If there is excessive interference with wireless communication, the shutter glasses 200 may not receive the beacon packet b at predetermined timing.

In order to achieve the above, according to the present exemplary embodiment, the following configuration is applied to the shutter glasses 200 .

The shutter glasses 200 determine the reception rate of the beacon packet b transmitted from the display device 100 to the glasses communication unit 210 for a preset time period based on a predetermined timing of playing and displaying content images. The shutter glasses 200 change the reception frequency of the beacon packet b received by the glasses communication unit 210 in accordance with the determined reception rate.

The timing based on which the reception rate is determined and the preset period of time may be changed in consideration of the system environment, and are not limited to specific numbers.

The basis for determining the reception rate of beacon packets b may vary. For example, the reception rate of the beacon packet b may be correlated with the packet error rate at the time when the glasses communication unit 210 receives the beacon packet b. The packet error rate may be defined as the frequency of reception failures with respect to packets received per unit time.

In particular, the shutter glasses 200 increase the receiving frequency of the beacon packet b when the packet error rate of the beacon packet b is relatively high (for example, greater than a predetermined threshold rate), and when the packet error rate of the beacon packet b is relatively low (for example, When the rate is less than the predetermined threshold rate), the receiving frequency of the beacon packet b is reduced.

More specifically, if it is determined that the beacon packet b has many reception errors, the shutter glasses 200 increase the reception frequency of the beacon packet b, thereby increasing the number of received beacon packets b per unit time. In order to realize the above situation, the shutter glasses 200 adjust the timing to an interval t3 which is shorter than t2 as the default receiving time period for receiving the beacon packet b. In some exemplary embodiments, interval t3 may be specified as a multiple of t1 , similar to that described above for t2 , but t3 is less than t2 and equal to or greater than t1 , as shown in graph 430 .

If there are relatively many reception errors related to the beacon packet b, that is, it is determined that there is a relatively large amount of interference affecting wireless communication in the usage environment of the display systems 1 and 2, t2 may be set equal to t1.

Conversely, shutter glasses 200 may determine that there are relatively few reception errors associated with beacon packets. In particular, there may be a relatively small amount of interference affecting the wireless communications of the display systems 1 and 2 . In such a case, the shutter glasses 200 may reduce the reception frequency of the beacon packet b, thereby reducing the reception number of the beacon packet b per unit time. The shutter glasses 200 can reduce the receiving frequency by adjusting the timing to an interval t4 greater than t2 as the default receiving time period for receiving the beacon packet b, as shown in the fourth graph 440 .

Depending on the wireless environment, the shutter glasses 200 may increase the reception number of beacon packets b per unit time in order to increase the accuracy of the operation of the shutter glasses 200, or the shutter glasses 200 may reduce the power consumption of the power consumption battery 230, thereby performing selective operations and The operating time of the shutter glasses 200 is optimized.

Hereinafter, a control method of 3D glasses according to an exemplary embodiment will be described with reference to FIG. 6 . FIG. 6 is a flowchart illustrating a control method.

In the first operation, the 3D glasses are paired with the display device (operation S100). The 3D glasses start to receive a beacon signal from the paired display device (operation S110 ).

The 3D glasses determine the reception rate of the beacon signal in a preset time period based on an unrestricted predetermined timing (operation S120 ). The 3D glasses change the reception frequency of the beacon signal corresponding to the determined reception rate (operation S130).

The 3D glasses receive the beacon signal according to the changed reception frequency (operation S140), and operate the glasses based on the received beacon signal (operation S150).

In the foregoing exemplary embodiments, the shutter glasses 200 change a reception frequency and receive a beacon signal. However, the scope of the inventive concept is not limited to the above, and may include other various modifications and changes. For example, the display apparatus 100 instead of the shutter glasses 200 may change the transmission frequency of the beacon signal and transmit the beacon signal at the changed transmission frequency. This exemplary scenario will be described below.

FIG. 7 illustrates the relationship between the search signal transmitted by the display apparatus 100 and the response to the search signal transmitted by the shutter glasses 200 .

As shown in FIG. 7 , the display apparatus 100 may output a search signal to search for the shutter glasses 200 so as to realize a communication operation with the shutter glasses 200 . For example, when pairing between the display apparatus 100 and the shutter glasses 200 is completed, the display apparatus 100 transmits a reconnect serial packet (operation 510 ). The reconnection serial packet can be understood similarly as described with reference to FIG. 4, and thus a detailed description will be omitted.

Since the reconnection tandem packet includes information necessary for receiving the beacon packet, the shutter glasses 200 should receive the reconnection tandem packet before receiving the beacon packet.

If the display apparatus 100 successfully transmits the reconnection tandem packet (operation 520 ), the shutter glasses 200 transmit a response packet to the display apparatus 100 in response to the successful reception of the reconnection tandem packet (operation 530 ).

If the shutter glasses 200 fail to receive a reconnection tandem packet from the display device 100 within a preset period of time (operation 540), the shutter glasses 200 send a request packet to the display device 100 to request retransmission of the reconnection tandem packet (operation 550 ).

FIG. 7 illustrates the interaction between a single display device 100 and a single shutter glasses 200 , however, for example, in the theater environment shown in FIG. 2 , the display device 100 performs the aforementioned process for each of a plurality of shutter glasses 200 .

According to the present exemplary embodiment, the display device 100 determines the reception rate of the plurality of shutter glasses 200 receiving the reconnection tandem packet within a preset time period after the display device 100 transmits the reconnection tandem packet, and changes the reception rate according to the determined reception rate. How often beacon packets are sent.

Acceptance rates can be determined in a number of ways. For example, the reception rate may be determined based on the received number of response packets 530 and the received number of request packets 550 transmitted by the plurality of shutter glasses 200 to the display apparatus 100 within a predetermined period of time. The response packet 530 is transmitted when the shutter glasses 200 successfully receive the reconnection tandem packet, and the request packet 550 is transmitted when the shutter glasses 200 fail to receive the reconnection tandem packet.

Therefore, a large number of response packets 530 generally indicates that the wireless communication environment in which systems 1 and 2 communicate is relatively clear and has less interference. A large number of request packets 550 generally indicates that the wireless communication environment in which the display systems 1 and 2 communicate is unclear and has more interference. Specifically, the reception rate may be adjusted in proportion to the received number of response packets 530 and inversely proportional to the received number of request packets 550 .

If it is determined that the reception rate of the plurality of shutter glasses 200 is high, for example, greater than the predetermined threshold rate, the display device 100 reduces the transmission frequency of the beacon packet, and if it is determined that the reception rate of the plurality of shutter glasses 200 is low, for example, less than the predetermined threshold rate , the display device 100 increases the sending frequency of the beacon packets. Accordingly, the display apparatus 100 adjusts the transmission period of the beacon packet to be longer than the default value to reduce the transmission frequency of the beacon packet, and adjusts the transmission period of the beacon packet to be shorter than the default value to increase the transmission frequency of the beacon packet.

In particular, if there is a relatively large amount of interference in the communication environment, the display apparatus 100 increases the transmission number of beacon packets per unit time, so that the reception rate of the beacon packets employed by the shutter glasses 200 increases.

If there is a relatively small amount of interference in the communication environment, the display apparatus 100 reduces the transmission number of beacon packets per unit time. Since the shutter glasses 200 receive beacon packets based on the information transmitted by the display device 100, it is possible to reduce the reception rate of the beacon packets adopted by the shutter glasses 200 and reduce the number of beacon packets used by the shutter glasses 200 by reducing the transmission rate of the beacon packets per unit time by the display device 100. power consumption.

Hereinafter, a control method of the display device 100 according to the present exemplary embodiment will be described with reference to FIG. 8 . Fig. 8 is a flowchart illustrating its control method.

In a first operation, the display apparatus 100 outputs a search signal to search for at least one shutter glasses 200 (operation S200 ).

The display apparatus 100 receives a response packet in response to the search signal or a request packet requesting the search signal again from the shutter glasses 200 for a preset period of time after the search signal is output (operation S210 ).

The display apparatus 100 calculates a reception rate of the at least one shutter glasses 200 based on the number of received response packets and the number of received request packets (operation S220 ).

The display apparatus 100 changes the transmission frequency of the beacon signal based on the calculated reception rate (operation S230). The display apparatus 100 transmits a beacon signal to the at least one shutter glasses 200 at the changed frequency (operation S240).

While a few exemplary embodiments have been shown and described, it will be readily understood by those skilled in the art that changes may be made in the exemplary embodiments without departing from the present invention, the scope of which is defined in the appended claims and their equivalents. The principles and scope of the inventive concept.

Claims (14)

1. A multi-view device used in conjunction with a display device, comprising: Lenses, which operate to selectively transmit or block light; a communication unit that communicates with the display device that is displaying the content image; and A controller that receives a beacon signal synchronized with a display period of a content image from the display device via the communication unit, controls the operation of the glasses according to the received beacon signal, and changes the beacon signal via the communication unit in accordance with the use time of the multi-view device receiving frequency. 2. The multi-view device according to claim 1, wherein the controller controls the receiving frequency according to the receiving rate of the beacon signal in a preset time period, and A reception rate of the beacon signal is determined based on a packet error rate related to reception of the transmitted beacon signal via the communication unit. 3. The multi-view device according to claim 2, wherein the controller increases the receiving frequency of the beacon signal when the packet error rate is greater than a predetermined threshold rate, and decreases the receiving frequency of the beacon signal when the packet error rate is less than the predetermined threshold rate . 4. The multi-view device according to claim 3, wherein the controller reduces the receiving frequency of the beacon signal by adjusting the receiving period of the beacon signal to be longer than a default value, and by adjusting the receiving period of the beacon signal to be short Increase the frequency at which beacon signals are received from the default value. 5. The multi-view device of claim 1 , further comprising a battery powering the communication unit, wherein The controller controls the amount of power supplied by the battery to the communication unit to enable or disable the communication unit to control the reception frequency of beacon signals. 6. The multi-view device of claim 1, wherein the communication unit receives the beacon signal via radio frequency (RF) wireless communication. 7. A display device comprising: a signal receiver, which receives an image signal; a signal processor that processes the received image signal by using a preset image processing operation; a display unit that displays a content image based on the processed image signal; a communication unit that communicates with at least one multi-view device that operates in synchronization with a display period of the content image; and a controller that outputs a search signal to search for at least one multi-view device via the communication unit, transmits a beacon signal to the at least one searched multi-view device via the communication unit in synchronization with a display period of the content image, and based on The transmission frequency of the beacon signal is changed according to the reception rate of the search signal for searching at least one multi-view device. 8. The display device according to claim 7, wherein if the multi-view device receives the search signal, the controller receives a response packet from at least one multi-view device in response to the search signal, and if the multi-view device is within a preset time period Failure to receive the search signal, the controller receives a request packet requesting the search signal from at least one multiview device, and determines a reception rate based on the received number of response packets and the received number of request packets. 9. The display device according to claim 8, wherein the reception rate is set to be proportional to the received number of response packets and inversely proportional to the received number of request packets. 10. The display device according to claim 7, wherein the controller decreases the transmission frequency of the beacon signal when the reception rate is determined to be greater than a predetermined threshold rate, and increases the transmission frequency of the beacon signal when the reception rate is determined to be less than the predetermined threshold rate. 11. The display device according to claim 7, wherein the controller reduces the transmission frequency of the beacon signal by adjusting the transmission period of the beacon signal to be longer than a default value, and by adjusting the transmission period of the beacon signal to be shorter than Default value to increase how often beacon signals are sent. 12. The display device according to claim 7, wherein the communication unit transmits the beacon signal via radio frequency (RF) wireless communication. 13. A method for controlling a multi-view device used in conjunction with a display device, the method comprising: receiving a beacon signal synchronized with a display period of a content image displayed on the display device from the display device; changing the frequency at which beacon signals are received based on the time of use of the multi-view device; and A beacon signal is received at a changed reception frequency, and the glasses of the multi-view device are operated in accordance with the received beacon signal. 14. A control method for a display device, comprising: display content image; outputting a search signal to search for at least one multi-view device operating in synchronization with a display period of the content image; changing a transmission frequency of a beacon signal synchronized with a display cycle of the content image based on a reception rate of a search signal for searching at least one multi-view device in a preset period of time; and A beacon signal is transmitted to at least one searched multi-view device at a changed transmission frequency.

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