JP5402637B2 - Display device, display method, and display operation control program - Google Patents

Description

  The present invention relates to a display panel unit, an optical shutter, a display device including these, and more particularly to a display device that switches a plurality of images and displays them at high speed.

At present, notebook computers, PDAs (Personal Digital Assistants), mobile phones, and the like are routinely used in places where others exist, such as vehicles such as trains and airplanes, and various public facilities. These movements are the result of the development of the public LAN (Local
With the increase in area network facilities, it is expected to accelerate further in the future. Under such an environment, there arises a security and privacy problem that surrounding people can see the display content on the display.

  On the other hand, the trend of protecting confidential information such as the enactment of the Personal Information Protection Law is increasing. Therefore, not only when used outside as described above, but also when using a desktop machine at work etc., measures such as protecting highly confidential information from those other than qualified viewing personnel are required. .

  As one of technologies that meet such a demand, for example, Patent Document 1 discloses a display device that combines a display of a plurality of images and an optical shutter synchronized therewith. FIG. 12 is an explanatory diagram showing the configuration of the display device and the image display timing in Patent Document 1. Hereinafter, description will be given based on this drawing.

  The display device 500 of Patent Document 1 includes a display panel 501, an optical shutter 502, and a display control unit 503 that controls these. In the display device 500, the normal image 511 that is the image that the user wants to display and the inverted image 512 obtained by inverting the normal image 511 are switched and displayed, and the state 513 of the optical shutter 502 existing in front of the user is normal. A transparent state is set in synchronization with the image 511. As a result, the user who uses the optical shutter 502 recognizes the perceived image 514 equal to the normal image 511, and the peripheral unspecified person perceives the halftone (gray) perceived image in which the normal image 511 and the inverted image 512 are superimposed. 515 is recognized. Here, since the normal image is an image that the optical shutter user wants to visually recognize, the normal image is hereinafter referred to as “specific image”.

  However, when the display cycle of the specific image is constant, if the cycle is determined, the specific image is recognized by others having the same optical shutter.

  A display device that solves such a problem is disclosed in Patent Document 2. FIG. 13 is a block diagram showing the display device of Patent Document 2. As shown in FIG. Hereinafter, description will be given based on this drawing.

  The display device 600 of Patent Document 2 is formed by connecting an active glass 610 as an optical shutter and a computer 620 having a display 627 via a communication link 630. The active glass 610 includes a receiver 611, a decoder 612, a shutter sequence control unit 613, a lens 614 with a shutter, and the like. The computer 620 includes a displayable application program 621, a program 622 for displaying a “fill” pattern (screen saver or an unknown pattern), a random number generator 623, an encoder application 624, a replacement device driver 625, and a data synchronization generator 626. A display 627, a transmitter 628, and the like. The communication link 630 is a wireless link using infrared rays or RF (Radio Frequency).

  In the display device 600, other display images are randomly inserted between successive specific images, and the active glass 610 is opened and closed in synchronization with the specific images based on the timing information of the specific image display in the display order. As a result, since the display cycle of the specific image is random, security is higher than when the specific image is displayed with a constant display cycle. In the active glass 610 (that is, the optical shutter), “open” indicates a transmissive state, and “closed” indicates a non-transmissive state.

  At this time, if encryption of transmission information generally performed in communication technology is performed, even if the other person having the active glass 610 intercepts the transmission signal of the communication link 630, the display timing of the specific image I can't know.

JP-A-6-110403 JP 2001-255844 A

  However, as in Patent Document 2, the specific image has a random display cycle, and a signal for synchronizing the opening and closing of the optical shutter with the specific image (hereinafter referred to as “synchronization signal”) is encrypted and is transmitted by a wireless link. Even when transmitted to the optical shutter, there are the following problems. That is, the wireless link is interrupted due to infrared blocking, interference with other devices, or the image display ends before the synchronization signal transmission ends due to the high load on the wireless link due to multiplexing, etc. When the phenomenon occurs, the timing of the specific image display and the opening / closing of the optical shutter do not match until the link is restored. This phenomenon is hereinafter referred to as “synchronization loss”. If this synchronization shift occurs, even the original user of the optical shutter cannot recognize the specific image.

  Further, if the specific image is displayed at a constant cycle, it is possible to recognize the specific image by maintaining the optical shutter opening / closing timing immediately before it even when the wireless link is interrupted. However, in this case, as described above, the specific image is recognized by other optical shutter owners.

  Note that the above-described problem of Patent Document 2 is a problem common to all display devices that synchronize the operation of the optical shutter and the display panel by wireless communication.

  Therefore, an object of the present invention is to provide a display device and the like that solves the synchronization shift caused by the state of wireless communication, which is the problem described above.

In order to achieve the above object, a display device according to the present invention includes a display panel unit that sequentially and repeatedly displays a plurality of images on a display screen, and an optical shutter that performs an opening and closing operation in synchronization with the display of a specific image in the plurality of images. A display device comprising:
The display panel unit is
A time reference unit for outputting a current time signal indicating the current time;
Display timing signal output means for outputting a display timing signal corresponding to the current time signal output from the time reference unit to the display control unit of the display panel unit,
The optical shutter is
A time reference unit for outputting a current time signal indicating the current time;
And an opening / closing timing signal output means for outputting an opening / closing timing signal corresponding to the current time signal output from the time reference section to the opening / closing control section of the optical shutter.

A display panel unit according to the present invention is used in combination with an optical shutter of a display device, and is a display panel unit that sequentially and repeatedly displays a plurality of images on a display screen,
A time reference unit for outputting a current time signal indicating the current time;
And display timing signal output means for outputting the display timing signal corresponding to the current time signal output from the time reference section to the display control section.

An optical shutter according to the present invention is an optical shutter that is combined with a display panel unit of a display device and performs an opening / closing operation synchronized with a specific image display in a plurality of images displayed by the display panel unit,
A time reference unit for outputting a current time signal indicating the current time;
And an open / close timing signal output means for outputting the open / close timing signal corresponding to the current time signal output from the time reference unit to the open / close control unit.

A display method according to the present invention is a display method in which a display panel unit sequentially displays a plurality of images on a display screen and performs an opening / closing operation synchronized with a specific image display in the plurality of images by an optical shutter,
Output a current time signal indicating the current time, output a display timing signal corresponding to the current time signal to the display control unit of the display panel unit,
A current time signal indicating the current time is output, and an open / close timing signal corresponding to the current time signal is output to the open / close control unit of the optical shutter.

The display operation control program according to the present invention is a display operation in which a plurality of images are sequentially and repeatedly displayed on a display screen by a display panel unit, and an opening / closing operation is performed in synchronization with a specific image display in the plurality of images by an optical shutter. A control program,
On the computer,
A function of outputting a current time signal indicating a current time, a function of outputting a display timing signal corresponding to the current time signal to a display control unit of the display panel unit,
And a function of outputting an opening / closing timing signal corresponding to the current time signal to the opening / closing control unit of the optical shutter.

  According to the present invention, the display and the opening / closing of the shutter are synchronized with the current time instead of synchronizing the display of the screen and the opening / closing of the shutter unit while always performing wireless communication between the display panel unit and the optical shutter. Therefore, the synchronization shift caused by the state of wireless communication can be eliminated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a first embodiment of a display device according to the present invention. Hereinafter, description will be given based on this drawing.

  In the display panel unit 10 according to the present embodiment, the shutter unit 21 is opened according to the display timing signal with respect to the optical shutter 20 that transmits light by opening the shutter unit 21 and blocks light by closing the shutter unit 21. In some cases, the display control unit 12 displays a specific image on the panel unit 11 and displays a non-specific image on the panel unit 11 when the shutter unit 21 is closed. The display panel unit 10 outputs a time reference unit 13 that outputs a current time signal indicating the current time, and a display that outputs a display timing signal corresponding to the current time signal output from the time reference unit 13 to the display control unit 12. And a timing signal output means 10a.

  An example of the “display timing signal corresponding to the current time signal” will be described. Let the current time indicated by the current time signal be t1, t2, t3,. As the non-specific image, an inverted image obtained by inverting the specific image is used. In the display timing signal, the display of the specific image is “1”, and the display of the inverted image is “0”. At this time, the display timing signal corresponds to the current time signal, such as “1” for t1 to t2, “0” for t2 to t3, “1” for t3 to t4, and so on. For example, the current time is compared with the set time, and when the current time matches the set time, “0” or “1” corresponding to the set time is output. As a matter of course, the interval between each current time is a value that looks like a halftone by superimposing the specific image and the reverse image on the viewer without the optical shutter 20. The display panel unit 10 synchronizes the display with respect to the current time, rather than synchronizing the opening and closing of the shutter unit 21 and the display of the panel unit 11 while always communicating wirelessly with the optical shutter 20. The synchronization shift caused by the state of wireless communication can be eliminated.

  The optical shutter 20 according to the present embodiment transmits light of a specific image by opening the shutter unit 21 according to an open / close timing signal with respect to the display panel unit 10 that sequentially displays a specific image and a non-specific image on the panel unit 11. An opening / closing control unit 22 that shields light of a non-specific image by closing the shutter unit 21 is provided. The optical shutter 20 includes a time reference unit 23 that outputs a current time signal indicating the current time, and an opening / closing timing that outputs an open / close timing signal corresponding to the current time signal output from the time reference unit 23 to the open / close control unit 22. And a signal output means 20a.

  An example of the “opening / closing timing signal corresponding to the current time signal” will be described. Let the current time indicated by the current time signal be t1, t2, t3,. In the opening / closing timing signal, the shutter opening is set to “1” and the shutter closing is set to “0”. At this time, the opening / closing timing signal corresponds to the current time signal, such as “1” for t1 to t2, “0” for t2 to t3, “1” for t3 to t4, and so on. For example, the current time is compared with the set time, and when the current time matches the set time, “0” or “1” corresponding to the set time is output. As a matter of course, the interval of each current time is a value at which the specific image and the reverse image are superimposed and viewed as a halftone by a viewer without the optical shutter 20 if the reverse image of the specific image is used as the non-specific image. It is. According to the optical shutter 20, the opening and closing of the shutter unit 21 and the display of the panel unit 11 are not synchronized with the display panel unit 10 while always performing wireless communication, but the opening and closing is synchronized with the current time. The synchronization shift caused by the state of wireless communication can be eliminated.

  The display device 1 according to the present embodiment includes a display panel unit 10 and an optical shutter 20. According to the display device 1, the display panel unit 10 and the optical shutter 20 always perform wireless communication, and does not synchronize the display of the panel unit 11 and the opening / closing of the shutter unit 21. Since the opening and closing are synchronized, the synchronization shift caused by the state of wireless communication can be eliminated. The display timing signal and the opening / closing timing signal may be signals whose display timing changes irregularly according to the current time. In this case, since the regularity of display and opening / closing timing is not stolen by others, the security can be further improved.

  The “current time” is not limited to the standard time, and may be an elapsed time from a reference time. “Non-specific image” refers to a reverse image, a dummy image, or the like other than the specific image. The display timing signal output means 10 a or the time reference unit 13 may be provided in the same casing as the display panel unit 10, or a part or all thereof may be provided in a casing different from the display panel unit 10. It may be shared by a plurality of display panel units. Similarly, the opening / closing timing signal output means 20 a or the time reference unit 23 may be provided in the same housing as the optical shutter 20, or a part or all thereof may be provided in a different housing from the optical shutter 20. However, it may be shared by a plurality of optical shutters. The display timing signal output means 10a may generate and output a display timing signal, or may read and output a display timing signal stored in advance in a memory or the like. The opening / closing timing signal may be generated or read out and output to the optical shutter 20 via wireless communication in the same manner as the display timing signal. Similarly, the opening / closing timing signal output means 20a may generate and output an opening / closing timing signal, or may read and output an opening / closing timing signal stored in advance in a memory or the like. A display timing signal may be generated or read out and output to the display panel unit 10 via wireless communication in the same manner as the opening / closing timing signal. In the wireless communication between the display panel unit 10 and the optical shutter 20, the timing signal is intermittently transmitted and received instead of always transmitting and receiving the timing signal. “Intermittently transmit / receive timing signals” refers to, for example, transmitting / receiving timing signals at regular intervals, transmitting / receiving timing signals before starting a display operation and an opening / closing operation.

  Further, the display device 1 of the present embodiment has the following configuration. The display timing signal output means 10a transmits the display timing signal and the opening / closing timing signal to the optical shutter 20 intermittently, and the signal generating unit 15 as a timing signal generating unit that generates the display timing signal and the opening / closing timing signal. And a communication unit 17 as a wireless transmission unit. The opening / closing timing signal output means 20 a includes a communication unit 26 as a wireless receiving unit that receives the opening / closing timing signal transmitted from the communication unit 17.

  In the display timing signal output means 10a, the signal generation unit 15 generates a display timing signal and an opening / closing timing signal corresponding to the time. The display control unit 12 sequentially displays the specific image and the non-specific image on the panel unit 11 in accordance with the current time signal output from the time reference unit 13 and the display timing signal generated by the signal generation unit 15. On the other hand, the communication unit 17 intermittently transmits the opening / closing timing signal generated by the signal generation unit 15 to the optical shutter 20. In the opening / closing timing signal output means 20 a, the communication unit 26 receives the opening / closing timing signal transmitted from the communication unit 17. The open / close control unit 22 opens and closes the shutter unit 21 to transmit light of the specific image according to the current time signal output from the time reference unit 23 and the open / close timing signal received by the communication unit 26. Shield. That is, according to the display device 1, the open / close timing signal is intermittently transmitted from the display panel unit 10 to the optical shutter 20, and the display and open / close are synchronized with the current time. Compared to the case where the display of the panel unit 11 and the opening / closing of the shutter unit 21 are synchronized while always performing wireless communication with the shutter 20, synchronization deviation caused by the state of wireless communication can be eliminated.

  The display timing signal output means 10a generates a predetermined display timing signal or reads a display timing signal stored in a memory or the like, and the opening / closing timing signal output means 20a determines a predetermined opening / closing timing signal. When the open / close timing signal stored in the memory or the like is read out, the communication units 17 and 26 can be omitted. In this case, since the display panel unit 10 and the optical shutter 20 operate in conjunction with a predetermined current time, it is not necessary to communicate between the display panel unit 10 and the optical shutter 20.

  Hereinafter, the display device 1 of the present embodiment will be described in more detail.

  The display device 1 of the present embodiment includes a display panel unit 10 having a display control unit 12 that repeatedly displays a plurality of images sequentially, and an optical shutter 20 that is opened and closed in synchronization with a specific image display. The display panel unit 10 includes a communication unit 17 that transmits and receives signals to and from the optical shutter 20, a signal generation unit 15 that generates an image display timing signal and an opening and closing timing signal for the optical shutter 20, and a memory 14 that stores a display timing signal and the like. A time reference unit 13 that generates a display start signal as a current time signal, a display control unit 12 that sequentially and repeatedly displays a plurality of images on the panel unit 11 so as to match a display timing signal in the memory 14, and an optical shutter 20 The processing unit 16 that presents various selection menus and performs processing according to the selected menu is included.

  The panel unit 11 is, for example, an LCD (Liquid Crystal Display), and is generally composed of a TFT (Thin Film Transistor) substrate, a counter substrate, and a liquid crystal layer sandwiched therebetween. A circuit for driving the panel unit 11 (a gate driving circuit and a data driving circuit in the case of the above-described LCD) may be attached to the panel unit 11 or may be included in the display control unit 12. The panel unit 11 is not limited to the LCD, and may be a self-luminous type such as an LED (Light Emitting Diode) display, an FED (Field Emission Display) display, an organic EL (Electro Luminescence) display, or the like. Not limited to this, a projection type such as a projector may be used. The display signal control unit 12 is, for example, a drive circuit for the panel unit 11.

  The time reference unit 13 performs an accurate time display using a standard radio wave, an atomic clock, a GPS (Global Positioning System), and the like, and based on this time, an image is displayed with a display timing signal recorded in the memory 14. A display start signal as a current time signal is generated so that is displayed. In this case, the circuit delay in the display panel unit 10 may be adjusted by the generation timing of the display start signal, or the display timing signal recorded in the memory 14 is designated in advance in consideration of the delay. Also good.

  The memory 14 is, for example, a semiconductor memory or an HDD (Hard Disk Drive). The signal generation unit 15 is, for example, a dedicated IC that generates a random signal, a microcomputer, and a program thereof. The processing unit 16 is, for example, a dedicated IC, a microcomputer, and a program thereof. The communication unit 17 is a general transmission / reception circuit and antenna using infrared rays, radio waves, and the like.

  The optical shutter 20 includes a communication unit 26 that transmits and receives signals to and from the display panel unit 10, a memory 24 that stores an opening / closing timing signal transmitted from the display panel unit 10, and a time reference that refers to a time that serves as a reference for the opening / closing operation. And an open / close control unit 22 that opens and closes the shutter unit 21 so as to coincide with an open / close timing signal in the memory 24, a processing unit 25 that handles a selection menu transmitted from the display panel unit 10, and the like.

  The shutter unit 21 may be anything as long as it can switch between light transmission and shielding. For example, the shutter unit 21 may use liquid crystal or may be mechanical. Based on the display timing signal determined in the display panel unit 10, the opening / closing timing signal of the shutter unit 21 is determined, and the information is stored in the memory 24 through the communication unit 26. The subsequent operation is in accordance with the display panel unit 10. Alternatively, the opening / closing timing signal of the shutter unit 21 may be determined in the optical shutter 20, and the display timing signal of the viewing image may be determined in the display panel unit 10 based on the signal. However, in the case where there are a plurality of viewers or considering the demand for simplicity of the optical shutter 20, it is preferable to determine the image display timing in the display panel unit 10. In the display panel unit 10 and the optical shutter 20, illustration of input units such as a keyboard and a touch panel unit is omitted.

  The opening / closing control unit 22 is a drive circuit for opening / closing the shutter unit 21, for example. The configurations of the time reference unit 23, the memory 24, the processing unit 25, and the communication unit 26 are the same as those of the time reference unit 13, the memory 14, the processing unit 16, and the communication unit 17 described above. The display panel unit 10 and the optical shutter 20 are connected by wireless communication 31 and 32.

  Next, the display device 1 of the present embodiment will be described in detail once again with different words.

  The display device 1 according to the present embodiment includes a display panel unit 10 that sequentially and repeatedly displays a plurality of images on a display screen, and an optical shutter 20 that performs an opening / closing operation synchronized with a specific image display in the plurality of images. In addition, each of the display panel unit 10 and the optical shutter 20 includes time reference units 13 and 23. An image is displayed on the display panel unit 10 according to the current time signal output from the time reference unit 13 and the display timing signal generated by the signal generation unit 15, and the current time signal output from the time reference unit 23; The optical shutter 20 is opened / closed according to an opening / closing timing signal including time information supplied from the display panel unit 10.

  The optical shutter 20 is supplied with an opening / closing timing signal before the scheduled operation start, and performs an operation according to the opening / closing timing signal at a certain time output from the time reference unit 23. Similarly, the display panel unit 10 performs image display according to the display timing signal at a certain time output from the time reference unit 13. Since the opening / closing timing signal is sent to the optical shutter 20 before the start of visual recognition of the specific image, even if the communication state changes during visual recognition, there is no deviation between the timing of image display and shutter opening / closing. In addition, if the image display order of the specific image and the reverse image is made random, the display timing of the specific image is known only to the person who acquired the timing signal that was individually transmitted before the image display, and therefore has the image viewing qualification. It is also possible to realize a high level of security that prevents the owner of the optical shutter not to view the specific image illegally.

  The opening / closing timing signal describes the opening / closing timing from the start of the opening / closing operation to a certain period. Such timing may represent all of the time or the elapsed time from a certain time, or may represent the combination of the open / close pattern used and the number of times. In the case of the display timing signal, the display timing of each image may be specified in the same manner as the opening / closing timing. Such information may be sent encrypted.

  The shape of the optical shutter 20 is not particularly limited, and may be any shape, such as a glasses type (including a type attached to glasses that are normally used), a card type (not necessarily square), and a film shape. May be. Further, the optical shutter 20 may have a shape that exists alone, or may have a shape that is attached to or incorporated in another device such as a mobile phone, a PDA, or a notebook PC (Personal Computer). Furthermore, the optical shutter 20 may have a usage fee settlement function associated with the specific image viewing. For the settlement, various methods such as account withdrawal, billing for communication charges, use of a prepaid card may be used.

  When a plurality of displayed images include a specific image and its inverted image, the display period of both images should be the same in order to prevent the specific image from being discriminated when the brightness of both images is integrated over time. . However, the present invention is not necessarily limited to this, and the same effect can be obtained by increasing the brightness of either one and shortening the display period accordingly. When a plurality of displayed images include dummy images, it is not necessary to have the same display period as that of the specific image or the reverse image. Further, an image in which a dummy image is superimposed on a reverse image may be created and used.

  Further, the display device 1 supplies a new opening / closing timing signal to the optical shutter 20 before a predetermined period elapses, and after the certain period elapses, the current time signal output from the time reference unit 23 and the new opening / closing timing. The optical shutter 20 may be opened and closed according to the signal.

  Thereby, even when the information amount of the opening / closing timing signal is large, it is possible to continue to visually recognize the specific image while retransmitting the information on the way. In this case, the opening / closing timing signal may be transmitted within a certain period until the next opening / closing timing signal is required. Therefore, even when the wireless link between the display panel unit 10 and the optical shutter 20 is temporarily interrupted or a heavy load is applied, transmission of the opening / closing timing signal is normally completed.

  FIG. 2 is a schematic view showing how to use the display device of FIG. Hereinafter, description will be given based on this drawing.

  The user views the screen 11 ′ of the panel unit 11 provided in the display panel unit 10 through the optical shutter 20. At this time, the opening / closing timing of the optical shutter 20 is synchronized with the specific image display, so that only the user of the optical shutter 20 can visually recognize the specific image.

  As a result, the display panel unit 10 and the optical shutter 20 that sequentially and repeatedly display a plurality of images operate based on the timing signals generated by the signal generator 15 and stored in the memories 14 and 24 with reference to the reference time. Since the opening / closing timing signal is sent from the display panel unit 10 to the optical shutter 20 before the display of the specific image is started, even if the transmission / reception of the signal is hindered during the image display, there is a problem between them. There will be no out of sync.

  Further, the opening / closing timing information may be retransmitted after a certain period of time has elapsed. As a result, even when the information amount of the opening / closing timing signal is large, it is possible to continue viewing the specific image while retransmitting the information on the way. In this case, the opening / closing timing signal may be transmitted within a certain period until the next opening / closing timing signal is required. Therefore, even when the wireless link between the display panel unit 10 and the optical shutter 20 is temporarily interrupted or a high load is applied, transmission of the opening / closing timing signal is normally performed. In addition, if the image display order of the specific image and the reverse image is made random, the display timing of the specific image is known only to the person who acquired the timing signal that was individually transmitted before the image display, and therefore has the image viewing qualification. It is also possible to realize a high level of security that prevents the owner of the optical shutter not to view the specific image illegally.

  Here, display timing signals for all the plurality of images are also generated and stored in the memory 14 prior to the start signal. However, only the opening / closing timing of the optical shutter 20, that is, the display timing of the specific image is generated and the memory 14 is generated. And other images may be sequentially displayed based on this timing.

  In order to display an image accurately with respect to a reference time to be referred to, it is necessary to accurately grasp the time from the start of operation to the actual display. The same applies to the opening and closing of the shutter 20. For example, the time required from the start of operation to the realization and the allowable error may be determined in advance according to the standard, or the time from the start of operation to the actual image display or shutter opening / closing may be determined by a counter (not shown). You may measure each and use the value. Further, a combination of these two methods may be used, and any means for correctly synchronizing image display and shutter opening / closing may be taken. The reference time to be referred to may be a value that has been corrected in advance for the time required to display or open / close from the start of the operation, or the time at which display or open / close is performed is described as it is, and is corrected when the time is referenced. It may be in the form of applying.

  The time reference units 13 and 23 may not only be used as triggers for events such as image display and optical shutter opening / closing, but also may be used to increase the clock accuracy of the display panel unit 10 and the optical shutter 20.

  The display panel unit 10 and the optical shutter 20 may be controllable by wired connection. Even in that case, it is possible to synchronize the opening and closing of the optical shutter 20 using the intermittent wireless communication described in the description of this embodiment, in addition to the real-time synchronization signal transmission method. Further, an opening / closing timing signal is transmitted from the display panel unit 10 to the optical shutter 20 by wire connection in advance and stored in the memory 24. Then, the wire connection is disconnected, and the optical shutter is based on the timing signal stored in the memory 24. 20 may be operated.

  Further, the content of the specific image displayed on the display panel unit 10 may be updated as needed by image information from the outside of the display panel unit 10. Although not shown, the panel unit 11 may be provided separately from the display panel unit 10.

  FIG. 3 is a block diagram showing a second embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  In the display device of the present embodiment, the signal generation unit 52 as the timing signal generation unit and the communication unit 51 as the wireless transmission unit are made of a separate housing from the display panel unit 40 and to one or more display panel units. It is provided in a signal processing unit 50 that outputs a display timing signal. The display timing signal output unit 40 a includes a memory 44, a communication unit 45, and a signal processing unit 50. According to the display device of the present embodiment, the same operation and effect as in the first embodiment can be achieved, and the signal generation unit 52, the communication unit 51, and the like need not be provided in the display panel unit. It can be simplified.

  In other words, in the present embodiment, the display panel unit 10 of FIG. 1 is separated into a display panel unit 40 having an image display function and a signal processing unit 50 that performs various timing signal generation and presents and processes a selection menu. It is. Since the optical shutter is the same as that of the first embodiment, the illustration is omitted.

  Thereby, the structure of the display panel unit 40 becomes simple. The signal processing unit 50 and the display panel unit 40 may be connected via a public communication network or may be connected via a dedicated line. Here, one display panel unit 40 is connected to one signal processing unit 50, but it is also possible to connect a plurality of display panel units 40 to one signal processing unit 50. Further, a plurality of display panel units 40 may be connected to the display panel unit of FIG. 1 as a server.

  Next, the display device of the present embodiment will be described once again with different words.

  The display device of the present embodiment includes a display panel unit 40 that repeatedly displays a plurality of images sequentially on a display screen, an optical shutter (not shown) that performs an opening / closing operation synchronized with the display of a specific image in the plurality of images, and a display. The display device includes a signal processing unit 50 that transmits a signal generated to each of the panel unit 40 and the optical shutter, and each of the display panel unit 40 and the optical shutter includes time reference units 43,. A display timing signal for a plurality of images is transmitted from the unit 50 to the display panel unit 40, and an opening / closing timing signal is transmitted to the optical shutter. The panel unit 40 operates according to a display timing signal, and the optical shutter operates according to an opening / closing timing signal.

  The configuration of the panel unit 41, the display control unit 42, the time reference unit 43, the memory 44, the signal generation unit 52, and the processing unit 53 includes, for example, the panel unit 11, the display control unit 12, and the time reference unit in the first embodiment of FIG. 13, the memory 14, the signal generation unit 15, and the processing unit 16. The communication unit 45 and the communication unit 51 are connected by, for example, wired communication 60 and include, for example, a transmission / reception circuit for wired communication. The communication unit 51 has the configuration and function of the communication unit 17 in the first embodiment of FIG. 1 and performs wireless communication with the optical shutter.

  With this configuration, the display panel unit 40 and the optical shutter that repeatedly display a plurality of images sequentially operate based on a timing signal given from the signal processing unit 50 before the scheduled operation start. The signal processing unit 50 simplifies the configuration of the display panel unit 40 by generating and transmitting timing signals to the display panel unit 40 and the optical shutter, presenting a selection menu to the user, and processing corresponding thereto. it can.

  FIG. 4 is a block diagram showing a third embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  In the display device according to the present embodiment, the communication unit 84 as a wireless reception unit is provided in the information processing unit 80 that is formed of a separate housing from the optical shutter 70 and outputs an opening / closing timing signal to one or more optical shutters. ing. The opening / closing timing signal output unit 70 a includes a memory 74, a communication unit 75, and an information processing unit 80. According to the display device of this embodiment, the same operation and effect as the first embodiment can be achieved, and the communication unit 84 and the like need not be provided in the optical shutter 70, so that the configuration of the optical shutter 70 can be simplified.

  That is, the present embodiment is an example in which the communication function with the display panel unit 10 of FIG. 1 or the signal processing unit 50 of FIG. 3 is separated as the information processing unit 80 from the optical shutter 20 of FIG. Since the display panel unit is the same as that in the first or second embodiment, the illustration is omitted.

  Thereby, the structure of the optical shutter 70 can be simplified. The optical shutter 70 and the information processing unit 80 may be connected by a wire or may be a wireless link such as an RF link or an infrared link. When the optical shutter 70 and the information processing unit 80 are connected by wire, the optical shutter 70 does not need uniqueness (ID holding or the like), but in the case of a wireless link, it is necessary to specify the destination optical shutter 70. . Here, the information processing unit 80 can be incorporated in a mobile phone, a PDA, a notebook PC or the like having the panel unit 81.

  Next, the display device of the present embodiment will be described once again in other words.

  The display device according to the present embodiment includes a display panel unit (not shown) that sequentially and repeatedly displays a plurality of images on a display screen, an optical shutter 70 that performs an opening / closing operation synchronized with the display of a specific image in the plurality of images, The display device includes an information processing unit 80 that transmits a signal to the shutter 70, and a signal processing unit (see FIG. 3) that transmits a signal generated to each of the display panel unit and the information processing unit 80. 70 and the display panel unit each have a time reference section 73,... From the signal processing section, a display timing signal for a plurality of images is displayed for the display panel unit, and an information processing section 80 for the optical shutter 70. When the opening / closing timing signal is transmitted via the time reference unit 73,... 70 is characterized in that it works according respectively to the opening and closing timing signal.

  The configuration of the shutter unit 71, the open / close control unit 72, the time reference unit 73, the memories 74 and 83, and the processing unit 82 is, for example, the shutter unit 21, the open / close control unit 22, the time reference unit 23, and the memory in the first embodiment of FIG. 24 and the processing unit 25. The panel unit 81 is, for example, a general LCD. The communication unit 75 and the communication unit 84 are connected by, for example, wired communication 90, and include, for example, a transmission / reception circuit for wired communication. The communication unit 84 has the configuration and functions of the communication unit 26 in the first embodiment of FIG. 1 and performs wireless communication with the signal processing unit or the display panel unit.

  Thus, the information processing unit 80 performs all the operations such as the exchange of information with the signal processing unit and the transfer of the opening / closing timing signal to the optical shutter 70. Therefore, the configuration of the optical shutter 70 itself is simplified.

  The information processing unit 80 and the optical shutter 70 are not limited to wired connection. When a wireless link such as an RF link or an infrared link is used, it is desirable to perform encryption. Note that the information processing unit 80 may be provided in one of the plurality of optical shutters 70.

  Further, the information processing unit 80 may have a usage fee settlement function associated with the specific image viewing. For the settlement, various methods such as account withdrawal, billing for communication charges, use of a prepaid card may be used. When the information processing unit 80 is built in a mobile phone, PDA, notebook PC, etc., it can also be used as a settlement means.

  FIG. 5 is a block diagram showing a fourth embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  The display device of this embodiment is provided with an adjustment function unit 133 that adjusts an opening / closing timing signal used by the opening / closing control unit 132 so as to match the current time signal output from the time reference unit 134 of the optical shutter 130. . The opening / closing timing signal output unit 130a includes an adjustment function unit 133, a memory 135, a communication unit 136, and the like.

  According to the display device according to the embodiment of the present invention, the same functions and effects as those of the first embodiment can be achieved, and the adjustment function unit 133 can be provided to synchronize the display and the opening / closing accurately. .

  In other words, this embodiment is an example in which the opening / closing timing adjustment function unit 133 is incorporated in the optical shutter 130. In addition, since the display panel unit is the same as 1st or 2nd embodiment, illustration is abbreviate | omitted.

  The configuration of the shutter unit 131, the opening / closing control unit 132, the time reference unit 134, the memory 135, and the communication unit 136 includes, for example, the shutter unit 21, the opening / closing control unit 22, the time reference unit 23, the memory 24, and the like in the first embodiment of FIG. The communication unit 26 is applied. Note that the processing unit 25 in the first embodiment of FIG. 1 may be provided between the communication unit 136 and the memory 135.

  With this configuration, adjustment can be performed even when the timing of image display and optical shutter opening / closing is slightly shifted. It is desirable that adjustment is possible in units of several tens of nanoseconds, more preferably in units of nanoseconds. Further, the order may be switched so that the adjustment can be made in units of microseconds or milliseconds. The adjustment function unit 133 is incorporated in the optical shutter 130 in the drawing, but may be provided outside together with the time reference unit 134 and the like. In that case, it may be incorporated in the information processing unit (see FIG. 4) or may be an independent device as an adjustment function.

  The adjustment function unit 133 is realized by a PLL circuit, for example. For example, if a GPS signal is used, a reference signal can be received every second. Therefore, the frequency obtained by dividing the clock frequency on the display panel unit side or the optical shutter 130 side is calibrated by using this reference signal. Take out the signal and use it. For example, in order to adjust in units of several tens of nanoseconds, each device only needs to have a reference clock frequency on the order of several tens of MHz. If the accuracy is not required, the clock frequency of the device is used without any particular calibration.

  FIG. 6 is a block diagram showing a fifth embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  The display device 2 of the present embodiment includes a display panel unit 140 that repeatedly displays a plurality of images sequentially on a display screen, an optical shutter 150 that performs an opening / closing operation in synchronization with the display of a specific image in the plurality of images, and an optical shutter 150. An information processing unit 170 that transmits a signal, and a signal processing unit 160 that transmits a signal generated to each of the display panel unit 140 and the information processing unit 170 are provided. The display panel unit 140 and the information processing unit 170 have time reference units 143 and 173, respectively. A display timing signal for a plurality of images is transmitted from the signal processing unit 160 to the display panel unit 140. An opening / closing timing signal is transmitted from the signal processing unit 160 to the information processing unit 170. The display panel unit 140 displays a plurality of images according to the display timing signal at a certain time referred to by the time reference unit 143. The optical shutter 150 performs an opening / closing operation according to an opening / closing timing signal supplied from the information processing unit 170 at a certain time output from the time reference unit 173. The display timing signal output unit 140a includes a memory 144, a communication unit 145, a signal processing unit 160, and the like. The opening / closing timing signal output means 150a includes a communication unit 153 and an information processing unit 170 excluding the time reference unit 173.

  The configurations of the display panel unit 140 and the signal processing unit 160 conform to, for example, the display panel unit 40 and the signal processing unit 50 of the second embodiment of FIG. The configurations of the optical shutter 150 and the information processing unit 170 are similar to those of the optical shutter 70 and the information processing unit 80 of FIG. 4, for example, except that the time reference unit 173 is provided in the information processing unit 170. The signal processing unit 160 and the information processing unit 170 are connected by wireless communication 181 and 182.

  With this configuration, the operations and effects equivalent to those of the first embodiment can be obtained. In addition, information exchange with the signal processing unit 160 and operations such as operation control for opening and closing the optical shutter 150 in accordance with the opening and closing timing signal are all information processing. Since this is performed by the unit 170, the configuration of the optical shutter 150 is further simplified.

  That is, the optical shutter 150 includes not only the shutter unit 151 but also a communication unit 153 that performs signal transmission / reception with the information processing unit 170 and an opening / closing control unit 152 that opens and closes the shutter unit 151.

  The information processing unit 170 includes a communication unit 175 that transmits / receives signals to / from the signal processing unit 160 and the optical shutter 150, a memory 174 that stores an opening / closing timing signal received from the signal processing unit 160, and a reference time for the opening / closing operation. A time reference unit 173 to be referred to and a processing unit 172 that performs signal transmission / reception with the signal processing unit 160, transmission of an opening / closing timing signal to the optical shutter 150, image display on the panel unit 171, and the like are included. Here, the optical shutter 150 and the information processing unit 170 are not limited to a wired connection.

  Accordingly, the information processing unit 170 performs all operations such as signal transmission / reception with the signal processing unit 160, payment of a usage fee, generation of a start signal, and subsequent real-time transmission of an opening / closing timing signal to the optical shutter 150. Therefore, the optical shutter 150 only opens and closes the shutter unit 151 by the open / close control unit 152, so the configuration becomes very simple. For example, when the shutter unit 151 is a liquid crystal, the open / close control unit 152 is a simple voltage application unit.

  FIG. 7 is a chart showing an example of the opening / closing timing signal used in each embodiment of the present invention. Hereinafter, description will be given based on this drawing.

  FIG. 7A shows a format for designating all the opening time and closing time of the optical shutter. The upper row is a relative time display in which the timing is expressed by the elapsed time from the referenced reference time, and the lower row is an absolute time display in which the timing is expressed by the time. The upper elapsed time 1 corresponds to the lower opening time 1 and the upper elapsed time 2 corresponds to the lower closing time 1, respectively.

  FIG. 7B shows a format in which the opening period of the optical shutter is attached and only the opening time is designated among the opening and closing times. Again, the upper part is a relative time display in which the timing is expressed by the elapsed time from the referenced reference time, and the lower part is an absolute time display in which the timing is expressed by the time. As a result, the signal amount can be suppressed to about half that in the case of FIG. In this example, the shutter opening period is constant from the start to the end, but the opening period may be changed in the middle.

  FIG. 7C shows a format for designating the opening period of the optical shutter, the elapsed time from the referenced reference time, the open / close pattern composed of the time width, and the number of repetitions of the pattern. In the case where all the repetition counts are 1, this is almost the same timing designation format as FIG. In this case, the open period may be changed in the middle. For example, the pattern 1 may be repeated for a certain period, and the pattern 2 may be repeated for the next period.

  The specification format of such information is merely an example, and the timing may be defined using another format. In addition, these signals do not need to be sent at once from the start to the end, and may be sent several times.

  When a plurality of displayed images include a specific image and its inverted image, the display period of both images should be the same in order to prevent the specific image from being discriminated when the brightness of both images is integrated over time. . However, the present invention is not necessarily limited to this, and the same effect can be obtained by increasing the brightness of either one and shortening the display period accordingly. When a plurality of displayed images include dummy images, it is not necessary to have the same display period as that of the specific image or the reverse image. Further, an image in which a dummy image is superimposed on a reverse image may be created and used.

  In the case of such an image display signal, if the display period of the image is constant, only the display timing of the first image is specified, and if it is not constant, the display timing of each image may be specified. These pieces of information may be encrypted.

  FIG. 8 is a block diagram showing a sixth embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  In the display device 3 of this embodiment, the display timing signal output unit 190a corresponds to the signal generation unit 212 as an initial value signal generation unit that generates an initial value signal, and the initial value signal generated by the signal generation unit 212. A PRN (Pseudo Random Noise) generator 196 as a random number signal generator for generating a random number signal, and an encoder as a display timing signal generator for generating a display timing signal corresponding to the random number signal generated by the PRN generator 196 195 and a communication unit 211 as a wireless transmission unit that intermittently transmits the initial value signal generated by the signal generation unit 212 to the optical shutter 200 side. The opening / closing timing signal output means 200a includes a communication unit 224 as a wireless reception unit that receives the initial value signal transmitted from the communication unit 211, and a random number that generates a random number signal corresponding to the initial value signal received by the communication unit 224. A PRN generator 206 as a signal generation unit and an encoder 205 as an opening / closing timing signal generation unit that generates an opening / closing timing signal corresponding to the random number signal generated by the PRN generator 206 are provided. The PRN generator 196 of the display timing signal output means 190a and the PRN generator 206 of the open / close timing signal output means 200a have a function of generating the same random number signal for the same initial value signal. Such a function can be easily obtained by making the configurations of the PRN generators 196 and 206 the same. Note that “PRN” is a pseudo-random signal and refers to an artificially generated irregular signal such as an M-sequence signal.

  In the display timing signal output means 190a of the display panel unit 190, the signal generator 212 generates an initial value signal, the PRN generator 196 generates a random signal corresponding to the initial value signal, and the encoder 195 corresponds to the random signal. A display timing signal to be generated is generated. The display control unit 192 sequentially displays the specific image and the non-specific image on the panel unit 191 according to the current time signal output from the time reference unit 193 and the display timing signal generated by the encoder 195. On the other hand, the communication unit 211 intermittently transmits the initial value signal generated by the signal generation unit 212 to the optical shutter 200 side. In the opening / closing timing signal output means 200a of the optical shutter 200, the communication unit 224 receives the initial value signal transmitted from the communication unit 211, the PRN generator 206 generates a random number signal corresponding to the initial value signal, and the encoder 205. Generates an open / close timing signal corresponding to the random number signal. The opening / closing control unit 202 opens / closes the shutter unit 201 and transmits light of the specific image according to the current time signal output from the time reference unit 203 and the opening / closing timing signal generated by the encoder 205. Shield.

  According to the display device 3, the initial value signal is intermittently wirelessly transmitted from the display panel unit 190 side to the optical shutter 200 side, and the display and opening / closing are synchronized with the current time. Compared to the case where the display of the panel unit 191 is synchronized with the opening / closing of the shutter unit 201 while always performing wireless communication with the shutter 200, the synchronization shift caused by the state of wireless communication can be eliminated. In addition, since the initial value signal can reduce the amount of information compared to the opening / closing timing signal, the time for wireless transmission from the display panel unit 190 to the optical shutter 200 can be shortened. Can be resolved.

  In the display device 3, the signal generation unit 212 as an initial value signal generation unit and the communication unit 211 as a wireless transmission unit are formed of a separate casing from the display panel unit 190 and include one or more display panel units. Is provided in a signal processing unit 210 that outputs an initial value signal. Therefore, according to the display device 3, the signal generation unit 212 and the communication unit 211 need not be provided in the display panel unit 190, so that the configuration of the display panel unit 190 can be simplified.

  Further, in the display device 3, the communication unit 224 as a wireless reception unit is provided in the information processing unit 220 that is formed of a housing different from the optical shutter 200 and outputs an initial value signal to one or more optical shutters. Yes. Therefore, according to the display device 3, the communication unit 224 need not be provided in the optical shutter 200, so that the configuration of the optical shutter 200 can be simplified.

  Next, the display device 3 of the present embodiment will be described once again in other words.

  The display device 3 of the present embodiment includes a display panel unit 190 that sequentially and repeatedly displays a plurality of images on a display screen, an optical shutter 200 that performs an opening / closing operation in synchronization with display of a specific image in the plurality of images, and a signal to the optical shutter 200. And a signal processing unit 210 for transmitting signals generated to the display panel unit 190 and the information processing unit 220, respectively. Each of the display panel unit 190 and the optical shutter 200 includes time reference units 193 and 203 and PRN generators 196 and 206 that always produce the same result for the same initial value. Information including the same initial value is provided from the signal processing unit 210 to the display panel unit 190 and to the optical shutter 200 via the information processing unit 220. In the display panel unit 190, the same initial value is input to the PRN generator 196 at a certain time referred to by the time reference unit 193, and a plurality of images are displayed on the panel unit 191 according to the output result. Is called. In the optical shutter 200, the same initial value is input to the PRN generator 206 at a certain time referenced by the time reference unit 203, and the shutter unit 201 is opened / closed according to the output result.

  The configurations of the display panel unit 190 and the signal processing unit 210 are the same as those of the display panel unit 40 and the signal processing unit 50 of the second embodiment of FIG. 3 except for the encoder 195 and the PRN generator 196. The configurations of the optical shutter 200 and the information processing unit 220 are similar to those of the optical shutter 70 and the information processing unit 80 of the third embodiment in FIG. 4, for example, except for the encoder 205 and the PRN generator 206. The signal processing unit 210 and the information processing unit 220 are connected by wireless communication 231 and 232.

  With this configuration, the information transmitted from the signal processing unit 210 to the display panel unit 190 and the optical shutter 200 becomes the initial values of the PRN generators 196 and 206, so that the amount of information can be greatly reduced. In addition, since the communication function and the like are provided in the signal processing unit 210 and the information processing unit 220, the configuration of the display panel unit 190 and the optical shutter 200 can be simplified. The PRN may be set to a value according to the number of images to be displayed and the result may be encoded. Alternatively, the PRN may be set to a value different from the number of images to perform conversion according to the number of images during encoding. It may be. The PRN generators 196 and 206 may be replaced with other devices having similar functions. In addition to the communication function, the PRN generator 206 may also be provided in the information processing unit 220. In this case, the configuration of the optical shutter 200 can be further simplified.

  Hereinafter, the display device 3 of the present embodiment will be described in more detail.

  The display device 3 of the present embodiment includes a display panel unit 190 having a display control unit 192 that repeatedly displays a plurality of images sequentially, an optical shutter 200 that is opened and closed in synchronization with image display, a signal processing unit 210, and an information processing unit 220. Etc. The signal processing unit 210 transmits information 233 and 232 including the same initial value and a reference time to be referred to the display panel unit 190 and the information processing unit 220. The information processing unit 220 transmits and receives signals to and from the signal processing unit 210, and transfers information 234 including the initial value and the reference time received from the signal processing unit 210 to the optical shutter 200.

  In the display panel unit 190, a communication unit 197 that transmits and receives signals to and from the signal processing unit 210, a memory 194 that stores initial values and reference times transmitted from the signal processing unit 210, and the same result when the same initial values are input. The PRN generator 196 that outputs the code, the encoder 195 that encodes the output value of the PRN generator 196, the time reference unit 193 that determines the timing at which the initial value is input to the PRN generator 196, and the code output from the encoder 195 A display control unit 192 for displaying a plurality of images on the panel unit 191 is included.

  The optical shutter 200 includes a communication unit 207 that performs signal transmission / reception with the information processing unit 220, a memory 204 that stores an initial value, a reference time, an open / close period per image, and the like that are transmitted from the information processing unit 220. A time reference unit 203 that determines the timing to be input to the PRN generator 206; a PRN generator 206 that outputs the same result when the same initial value is input; an encoder 205 that encodes an output value of the PRN generator 206; An open / close control unit 202 that opens and closes the shutter unit 201 in accordance with the code output from the device 205 is included.

  The signal processing unit 210 includes a communication unit 211 that transmits and receives signals to and from the display panel unit 190 and the information processing unit 220, an initial value for the PRN generator that is transmitted to the display panel unit 190 and the information processing unit 220, a reference time, and one image. A signal generation unit 212 that generates and regulates necessary information such as a display period of the image and a shutter opening / closing period, a selection menu provided to the information processing unit 220, and a menu selection signal received from the information processing unit 220, and processing corresponding thereto A processing unit 213 and the like for performing are included.

  The information processing unit 220 includes information such as a communication unit 224 that performs signal transmission / reception with the signal processing unit 210 and the optical shutter 200, an initial value transmitted from the signal processing unit 210, a display period per image, and a shutter open period. A memory 223 to be stored, a processing unit 222 that performs a response to a selection menu transmitted from the signal processing unit 210, an image display on the panel unit 221, and the like are included.

  As a result, the same initial value is input to the PRN generator 196 in the display panel unit 190 and the PRN generator 206 in the optical shutter 200, and as a result, the same output result is generated. The output results are input to encoders 195 and 205, respectively, and encoding corresponding to the input values is performed. The display panel unit 190 and the optical shutter 200 perform an operation according to a given code and a display period with respect to the reference time.

  Since the PRN generators 196 and 206 have the same logical configuration, the same output result is produced when the same initial value is input after the same initial state.

  Next, an example of the operation from the operation of the PRN generator to the image display in the present embodiment will be specifically described below.

  For example, consider a case where three images of a specific image, a reverse image, and a public image are repeatedly displayed. Here, it is assumed that the display period of all the images is constant. A start signal is generated, and an initial value in the memory 194 is input to the PRN generator 196, and three values <0>, <1>, and <2> are output. The encoder 195 converts this output value into a combination of [0] and [1]. At this time, among the encoded values, [1] corresponds to the display of the specific image, and the optical shutter 200 is opened at the timing when [1] is output. The encoder <195> converts the output <0> of the PRN generator 196 to [001], <1> to [010], and <2> to [100]. The display panel unit 190 displays each image according to these values output from the encoder 195 at a fixed timing. In the optical shutter 200, the same operation is performed by the initial value in the memory 204, the PRN generator 206, and the encoder 205. When the [0] code is output, the closed state is maintained, and the [1] code is When output, it is opened for a predetermined period at a timing corresponding to the specific image display. The output from the encoder 205 is performed at a timing corresponding to image display.

  As a result, the information 233 transmitted from the signal processing unit 210 to the display panel unit 190 and the information 234 transmitted to the optical shutter 200 through the information processing unit 220 include the reference time, the display period per image, and the optical shutter opening / closing period. Since only the initial value of the PRN generator is obtained, the amount of information can be greatly reduced. The PRN may be set to a value according to the number of images to be displayed and the result may be encoded. Alternatively, the PRN may be set to a value different from the number of images and converted according to the number at the time of encoding. Any combination of encoding may be used. The PRN generators 196 and 206 may be replaced with other devices having similar functions.

  Although the example of three images is shown here, the number of display images may be increased by dividing a specific image, or the number of display images can be reduced by superimposing a public image on a reverse image to form a single image. May be. The image display period of the public image may be set to a value different from that of the specific image / inverted image. Further, the result of encoding the output of the PRN generator may be further converted into time information and used. Although the reference time and the initial value are transmitted, the initial value may be input to the PRN generator in accordance with the reference time, or the image display timing may be the reference time. Other methods may also be taken.

  In FIG. 8, various functions incorporated in the optical shutter 200 may be provided in the information processing unit 220 as illustrated in FIG. 6. The same applies to the PRN generator 206 and the encoder 205. As shown in FIG. 1, the function of the information processing unit 220 may be incorporated in the optical shutter 200. Further, the signal processing unit 210 may be incorporated in the display panel unit 190.

  FIG. 9 is an explanatory diagram illustrating an example of a method of using the display device of FIG. 6 or FIG. Hereinafter, description will be given based on this drawing.

  In this example, the users of the plurality of optical shutters 261 to 263 access the signal processing unit 250 through the public network 280 by the information processing units 271 to 273, respectively, perform necessary selection and reception of information, and then display A specific image is visually recognized from the images displayed on the screen 241 of the panel unit 240. A person who accesses the display panel unit 240 later receives the shutter opening / closing timing in accordance with the timing information retransmission to the preceding user. When the period until the information is retransmitted is long, an opening / closing timing signal may be newly generated and transmitted at an appropriate timing to generate a start signal. The specific image does not have to be one type, and a plurality of different images are displayed, and different specific images can be visually recognized by selection on the same screen 241. Each configuration of the display panel unit 240, the optical shutters 261 to 263, the signal processing unit 310, and the information processing unit 320 is based on, for example, the display device 2 in FIG. 6 or the display device 3 in FIG.

  Here, the display panel unit 240 and the signal processing unit 260 are separated, but they may be integrated. Further, although only one display panel unit 240 is connected to the signal processing unit 260, a plurality of display panel units 240 may be connected.

  FIG. 10 is a block diagram showing a seventh embodiment of the display device according to the present invention. Hereinafter, description will be given based on this drawing.

  An example of the time supply function is a timekeeping system using a satellite. That is, the display device 4 of the present embodiment is an example in which the time reference unit is configured by the GPS timer unit 323 and is provided in the information processing unit 320.

  The GPS timer 323 includes an antenna 324, a GPS receiver 325, and a time calculator 326. In GPS, a time signal is transmitted every second, and based on the above time signal received by the GPS receiver 325 through the antenna 324, a delay from the transmission from the satellite to the reception by the antenna 324, and the subsequent circuit delay In consideration of the above, the time calculation unit 326 calculates the time. Usually, the time is determined by comparing signals from a plurality of satellites. These signals do not need to be received every time, and the time may be calculated after an appropriate time.

  The configurations of the display panel unit 290 and the signal processing unit 310 are similar to the display panel unit 190 and the signal processing unit 210 of the sixth embodiment in FIG. The configuration of the optical shutter 300 and the information processing unit 320 is, for example, the optical shutter 200 and the information processing unit of the seventh embodiment in FIG. 8 except that a GPS timing unit 323 as a time reference unit is provided in the information processing unit 320. According to 220. The signal processing unit 310 and the information processing unit 320 are connected by wireless communication 331 and 332.

  According to the display device 4, the initial value signal is intermittently wirelessly transmitted from the display panel unit 290 side to the optical shutter 300 side, and the display and opening / closing are synchronized with the current time. Compared to the case where the display of the panel unit 291 and the opening / closing of the shutter unit 301 are synchronized while always performing wireless communication with the shutter 300, the synchronization shift caused by the state of wireless communication can be eliminated. In addition, the use of GPS makes it possible to construct a system with time information accuracy of several microseconds (submicroseconds depending on the situation). In addition, since the GPS signal includes position information in the GPS signal, even when the display point of the specific image is separated from the position of the user of the optical shutter, accurate time information can be reproduced correspondingly. . That is, when the position of the panel unit and the viewer is large, for example, shifted by a unit of several hundred meters, if the position information is included, the time until the displayed image arrives can be automatically corrected. It becomes possible.

  Such GPS signal input may be used not only as a trigger but also to increase the accuracy of the clock frequency.

  FIG. 11 is a flowchart showing an embodiment of a control program according to the present invention. Hereinafter, a description will be given based on FIGS. 1 and 11.

  The control program of this embodiment is executed by the display device 1 of FIG. The control program of the display panel unit 10 according to the present embodiment is such that the shutter unit 21 opens the shutter unit 21 according to the display timing signal with respect to the optical shutter 20 that transmits light and closes the shutter unit 21 to block light. This is for displaying a specific image on the panel unit 11 when it is open and displaying a non-specific image on the panel unit 11 when the shutter unit 21 is closed. Then, the control program for the display panel unit 10 of the present embodiment specifies the panel unit 11 using the process of inputting the current time signal indicating the current time (step S107) and the display timing signal corresponding to the current time signal. This is for causing the computer in the processing unit 16 to execute the process of displaying the image and the non-specific image (step S109).

  The control program for the optical shutter 20 according to the present embodiment opens the shutter unit 21 according to the open / close timing signal for the display panel unit 10 that sequentially displays the specific image and the non-specific image on the panel unit 11. And the light of the non-specific image is blocked by closing the shutter portion 21. Then, the control program for the optical shutter 20 according to the present embodiment opens and closes the shutter unit 21 using a process of inputting a current time signal indicating the current time (step S108) and an opening / closing timing signal corresponding to the current time signal. This is for causing the computer in the processing unit 25 to execute the processing (step S110).

  The computers of the processing units 16 and 25 are, for example, the above-described microcomputers (for example, DSP), and are general ones including a CPU, a ROM, a RAM, an input / output interface, and the like. The control program of the present embodiment is loaded into, for example, a RAM, and is read out from the CPU for each instruction sequence and executed.

  Hereinafter, it will be described in more detail with a focus on the flowchart of FIG.

  First, the display panel unit 10 is “public image display” (step S101). Here, the user operates a keyboard or the like (not shown) of the optical shutter 20 to input a “secret image (that is, specific image) viewing request”. Then, the processing unit 25 of the optical shutter 20 issues an instruction to the processing unit 16 of the display panel unit 10 via the communication units 26 and 17, and the processing unit 16 enters the “secret image display mode” (step S102). Subsequently, the processing unit 25 displays a menu on a panel unit (not shown), causes the user to input information such as a selectable image, a charge, and a time (step S103), and transmits the information via the communication units 26 and 17. Transmit to the processing unit 16. Subsequently, the processing unit 16 causes the signal generation unit 15 to generate a display timing signal and an opening / closing timing signal (step S104), stores the display timing signal in the memory 14 (step S105), and transmits the opening / closing timing signal to the communication unit 17, 26 to the processing unit 25. The processing unit 25 stores the opening / closing timing signal in the memory 24 (step S106). On the other hand, the processing unit 16 receives the current time signal from the time reference unit 13 to generate a start signal (step S107), reads the display timing signal corresponding to the current time signal from the memory 14, and uses this to display the display control unit. The specific image and the non-specific image are displayed on the panel unit 11 via 12. As a result, the display panel unit 10 becomes “secret image display” (step S109). Similarly, the processing unit 25 inputs a current time signal from the time reference unit 23 to generate a start signal (step S108), reads an opening / closing timing signal corresponding to the current time signal from the memory 24, and uses this to open / close control. The shutter part 21 is opened and closed via the part 22 (step S110). Finally, when the fixed time input in step S103 has elapsed, the processing unit 16 enters the “public image display mode” (step S111), and the display panel unit 10 returns to “public image display” (step S112).

  According to the control program of the present embodiment, the display panel unit 10 and the optical shutter 20 always perform wireless communication, and the display of the panel unit 11 and the opening / closing of the shutter unit 21 are not synchronized with each other, but with respect to the current time. Since the display and the opening / closing are synchronized, the synchronization shift caused by the state of wireless communication can be eliminated.

  Moreover, the control program of this embodiment can be paraphrased as follows.

  The operation of the display device in each embodiment described above can be programmed and executed by a computer in the display device. As an example, the control program according to the present embodiment causes the processing units 16 and 25 to sequentially display a plurality of images on the panel unit 11 and to cause the shutter unit 21 to perform an opening / closing operation synchronized with the specific image display in the plurality of images. Are the operation control programs that transmit the generated signals to the display control unit 12 and the open / close control unit 22, respectively. That is, before the target image display, the processing units 16 and 25 send a display timing of a plurality of images to the display control unit 12, and the opening / closing control unit 22 has an opening / closing timing synchronized with the specific image. The display control unit 12 and the open / close control unit 22 operate according to respective timings with respect to a certain time referred to by the time reference units 13 and 23 included in the display panel unit 10 and the optical shutter 20 respectively. To do.

  Thereby, even if the signal is intercepted even when viewed at a certain period of opening / closing timing, the holder of the optical shutter 20 that is not qualified has a high level of security that prevents the specific image from being visually recognized, and communication. It is possible to provide a display operation control program capable of realizing accurate synchronization between specific image display and optical shutter opening / closing timing regardless of the state.

  Note that the control program of this embodiment is written in the processing units 16 and 25 on the display panel unit 10 side and the optical shutter 20 side, but each is distributed to obtain image acquisition and display timing notification. For example, the exchange with the outside may be written in the processing units 16 and 25, and the image display may be written in the display control unit 12 and the open / close control unit 22. Further, the control program may be written in the time reference units 13 and 23, and the display control unit 12 and the opening / closing control unit 22 may be operated simultaneously with receiving the start signal from the time reference units 13 and 23. .

  In FIG. 11, the public image display mode and the secret image display mode are switched during viewing. However, the display is always performed in the secret image display mode, and the opening / closing timing of the optical shutter is the secret image display timing after a certain period of time has elapsed. It may be a system that does not match. Further, although not shown, billing may be performed by debiting an account or adding to a call charge.

  Although the control program of this embodiment implement | achieves operation | movement of the display apparatus 1 of FIG. 1, the control program which concerns on this invention may implement | achieve operation | movement of the display apparatus of each other embodiment. The control program according to the present invention at that time has a configuration corresponding to the operation of the display device of each embodiment.

  Next, an embodiment of a control method according to the present invention will be described with reference to FIG.

  The control method of this embodiment is the operation itself of the display device 1 of FIG. According to the control method of the display panel unit 10 of the present embodiment, the shutter unit 21 is controlled according to the display timing signal with respect to the optical shutter 20 that transmits light by opening the shutter unit 21 and shields light by closing the shutter unit 21. A specific image is displayed on the panel unit 11 when opened, and a non-specific image is displayed on the panel unit 11 when the shutter unit 21 is closed. And the control method of the display panel unit 10 of this embodiment inputs the present time signal which shows the present time, and uses the display timing signal corresponding to this present time signal, and a specific image and a non-specific image are displayed on the panel part 11. FIG. It is characterized by displaying.

  The control method of the optical shutter 20 of the present embodiment is such that the light of the specific image is displayed by opening the shutter unit 21 according to the opening / closing timing signal for the display panel unit 10 that sequentially displays the specific image and the non-specific image on the panel unit 11. And the light of the non-specific image is shielded by closing the shutter portion 21. And the control method of the optical shutter 20 of this embodiment inputs the present time signal which shows the present time, and opens and closes the shutter part 21 using the opening / closing timing signal corresponding to this present time signal, It is characterized by the above-mentioned. .

  According to the control method of the present embodiment, the display panel unit 10 and the optical shutter 20 always perform wireless communication, and the display of the panel unit 11 and the opening / closing of the shutter unit 21 are not synchronized, but the current time is determined. Since the display and the opening / closing are synchronized, the synchronization shift caused by the state of wireless communication can be eliminated.

  Although the control method of the present embodiment is the operation of the display device 1 in FIG. 1, the control method according to the present invention may be the operation of the display device of each of the other embodiments. The control method according to the present invention at that time has a configuration corresponding to the operation of the display device of each embodiment.

  Needless to say, the display device according to the present invention is not limited to the above embodiments. What combined a part or all of the structure of each embodiment in the range which is not inconsistent is also contained in this invention. Moreover, what carried out each embodiment as follows is also contained in this invention.

  Users of optical shutters directly access the display panel unit and signal processing unit, select menus, write necessary information to IC cards, etc., and use such IC cards connected to the optical shutter and information processing unit May be. At this time, the display panel unit may be a touch panel system. As a result, it is possible to realize an optical shutter configuration that does not use the information processing unit for accessing the signal processing unit and does not require a communication function, a menu selection function, or the like. In this case, however, the IC card or the like must include optical shutter opening / closing timing information over the entire period from the start to the end of the panel portion.

    The optical shutter or the information processing unit may have a billing settlement function for the specific image viewing. The signal processing unit may be separated from the display panel unit, or may be integrated with the display panel unit. For example, a mobile phone, a PDA, or a notebook PC may be used as the information processing unit.

  The optical shutter may be any type as long as light transmission and shielding can be switched at high speed. For example, the optical shutter may use liquid crystal or may be mechanical. There is no restriction | limiting in particular in shape, What kind of shape may be sufficient, such as spectacles type (including the mounting | wearing type to the spectacles used normally), a card | curd type (it does not need to be a square), and a film form. Moreover, the shape which exists in the optical shutter single-piece | unit may be sufficient, and the shape attached or incorporated in other apparatuses, such as an information processing part, may be sufficient.

  The display device of each embodiment may be provided with a conventionally used real-time transmission / reception function of opening / closing timing, a delay correction function, and the like. That is, the display device of each embodiment includes a conventionally used image display function based on a signal that is not based on time information, an opening / closing function of an optical shutter, a delay correction function in a wireless link system, a real-time transmission / reception function of an opening / closing timing, etc. May also be provided.

  In a display panel unit according to another embodiment of the present invention, the shutter unit opens according to a display timing signal with respect to an optical shutter that transmits light by opening the shutter unit and shields light by closing the shutter unit. A display control unit that displays a specific image on the panel unit when the shutter unit is closed and displays a non-specific image on the panel unit when the shutter unit is closed. The display panel unit according to the present invention includes a time reference unit that outputs a current time signal indicating the current time, and the display timing signal corresponding to the current time signal output from the time reference unit to the display control unit. The display timing signal output means for outputting may be provided.

  An optical shutter according to another embodiment of the present invention opens a shutter unit according to an open / close timing signal to a display panel unit that sequentially displays a specific image and a non-specific image on the panel unit, and emits light of the specific image. An open / close control unit is provided that blocks the light of the non-specific image by transmitting and closing the shutter unit. The optical shutter according to the present invention outputs a time reference unit that outputs a current time signal indicating the current time, and outputs the opening / closing timing signal corresponding to the current time signal output from the time reference unit to the opening / closing control unit. And an open / close timing signal output means.

  According to another embodiment of the present invention, there is provided a method for controlling a display panel unit according to a display timing signal for an optical shutter that transmits light by opening a shutter portion and shields light by closing the shutter portion. A specific image is displayed on the panel unit when the unit is open, and a non-specific image is displayed on the panel unit when the shutter unit is closed. The display panel unit control method according to the present invention inputs a current time signal indicating the current time, and uses the display timing signal corresponding to the current time signal to display the specific image and the non-specific on the panel unit. The structure which displays an image may be sufficient.

  An optical shutter control method according to another embodiment of the present invention includes: a display panel unit that sequentially displays a specific image and a non-specific image on a panel unit by opening the shutter unit according to an open / close timing signal; The light of the non-specific image is shielded by transmitting the light and closing the shutter portion. The optical shutter control method according to the present invention may be configured to input a current time signal indicating the current time and to open and close the shutter unit using the opening / closing timing signal corresponding to the current time signal. .

  A control program for a display panel unit according to another embodiment of the present invention is directed to an optical shutter that transmits light by opening a shutter portion and shields light by closing the shutter portion, according to a display timing signal. A specific image is displayed on the panel unit when the unit is open, and a non-specific image is displayed on the panel unit when the shutter unit is closed. The control program for the display panel unit according to the present invention includes a process of inputting a current time signal indicating the current time, and the specific image and the display on the panel unit using the display timing signal corresponding to the current time signal. The configuration may be such that the computer executes the process of displaying the non-specific image.

  An optical shutter control program according to another embodiment of the present invention is directed to a display panel unit that sequentially displays a specific image and a non-specific image on a panel unit by opening the shutter unit according to an open / close timing signal. The light of the non-specific image is shielded by transmitting the light and closing the shutter portion. The optical shutter control program according to the present invention includes a process of inputting a current time signal indicating the current time, and a process of opening and closing the shutter unit using the open / close timing signal corresponding to the current time signal. It may be configured to be executed by a computer.

  The present invention provides a display device that switches and displays a plurality of images at a high speed and opens and closes an optical shutter in synchronization with a specific image display, while maintaining high security and displaying a specific image regardless of a signal reception state. And a display method in which there is no synchronization shift in the opening / closing timing of the optical shutter, and a display method used in the display device can be provided.

While the present invention has been described with reference to the embodiments (and examples), the present invention is not limited to the above embodiments (and examples). Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2007-262736 for which it applied on October 5, 2007, and takes in those the indications of all here.

  According to the present invention, in a display device that switches and displays a plurality of images at high speed and opens and closes an optical shutter in synchronization with a specific image display, it is specified regardless of the signal reception state while maintaining high security. Since the display timing of the image and the opening / closing timing of the optical shutter can be matched, it has a possibility of being widely used in such fields as information processing terminals and information communication.

1 is a block diagram showing a first embodiment of a display device according to the present invention. It is the schematic which shows the usage method of the display apparatus of FIG. It is a block diagram which shows 2nd embodiment of the display apparatus which concerns on this invention. It is a block diagram which shows 3rd embodiment of the display apparatus which concerns on this invention. It is a block diagram which shows 4th embodiment of the display apparatus which concerns on this invention. It is a block diagram which shows 5th embodiment of the display apparatus which concerns on this invention. It is a chart which shows an example of the opening-and-closing timing signal used in each embodiment of the present invention. It is a block diagram which shows 6th embodiment of the display apparatus which concerns on this invention. It is explanatory drawing which shows an example of the usage method of the display apparatus of FIG. 6 or FIG. It is a block diagram which shows 7th embodiment of the display apparatus which concerns on this invention. It is a flowchart which shows one Embodiment of the control program which concerns on this invention. It is explanatory drawing which shows the structure of a display apparatus of patent document 1, and an image display timing. FIG. 11 is a block diagram showing a display device of Patent Document 2.

Explanation of symbols

1, 2, 3, 4 Display device 10, 40, 140, 190, 240, 290 Display panel unit 10a, 40a, 140a, 190a, 290a Display timing signal output unit 11, 41, 141, 191, 291 Panel unit 12, 42, 142, 192, 292 Display control unit 13, 43, 143, 193, 293 Time reference unit 15, 52, 162 Signal generation unit (timing signal generation unit)
17, 51, 161, 211, 311 Communication unit (wireless transmission unit)
195,295 Encoder (Display timing signal generator)
196,296 PRN generator (random number signal generator)
212, 312 Signal generator (initial value signal generator)
20, 70, 130, 150, 200, 261 to 263, 300 Optical shutter 20a, 70a, 130a, 150a, 200a, 300a Opening / closing timing signal output unit 21, 71, 131, 151, 201, 301 Shutter unit 22, 72, 132, 152, 202, 302 Open / close control unit 23, 73, 134, 173, 203 Time reference unit 26, 51, 84, 136, 175, 224, 328 Communication unit (wireless reception unit)
133 Adjustment function unit 205, 304 Encoder (open / close timing signal generation unit)
206,305 PRN generator (random number signal generator)
323 GPS timer 50, 160, 210, 250 Signal processor 80, 170, 220, 271-273 Information processor

Claims (11)

A display device having a display panel unit that sequentially and repeatedly displays a plurality of images on a display screen, and an optical shutter that performs an opening and closing operation in synchronization with a specific image display in the plurality of images,
The display panel unit is
A time reference unit for outputting a current time signal indicating the current time;
Display timing signal output means for outputting a display timing signal corresponding to the current time signal output from the time reference unit to the display control unit of the display panel unit,
The display timing signal comprises a repeated display pattern of the plurality of images referring to the current time signal in a certain period,
The optical shutter is
A time reference unit for outputting a current time signal indicating the current time;
Look including the opening and closing timing signal output means for outputting a closing timing signal corresponding to the current time signal output from the time reference section to the switching control section of the optical shutter,
The display device characterized in that the opening / closing timing signal comprises an opening / closing pattern of the optical shutter that refers to the current time signal in a certain period . The display timing signal output means includes
A timing signal generator for generating the display timing signal and the opening / closing timing signal;
A wireless transmission unit that intermittently transmits the opening / closing timing signal generated by the timing signal generation unit to the optical shutter;
The opening / closing timing signal output means includes:
The display device according to claim 1, further comprising a wireless reception unit that receives the opening / closing timing signal transmitted from the wireless transmission unit.   The display device according to claim 2, wherein the timing signal generation unit and the wireless transmission unit include a signal processing unit that outputs the display timing signal to one or more display panel units.   The display device according to claim 2, wherein the wireless reception unit includes an information processing unit that outputs the opening / closing timing signal to one or more optical shutters. The display timing signal output means includes
An initial value signal generator for generating an initial value signal;
A random number signal generation unit that generates a random number signal corresponding to the initial value signal generated by the initial value signal generation unit;
A display timing signal generation unit that generates the display timing signal corresponding to the random number signal generated by the random number signal generation unit;
A wireless transmission unit that intermittently transmits the initial value signal generated by the initial value signal generation unit to the optical shutter;
The opening / closing timing signal output means includes:
A wireless receiver that receives the initial value signal transmitted from the wireless transmitter;
A random number signal generation unit that generates a random number signal corresponding to the initial value signal received by the wireless reception unit;
An open / close timing signal generation unit that generates the open / close timing signal corresponding to the random number signal generated by the random number signal generation unit,
2. The random number signal generation unit of the display timing signal output unit and the random number signal generation unit of the opening / closing timing signal output unit generate the same random number signal for the same initial value signal. The display device described.   The display device according to claim 5, wherein the initial value signal generation unit and the wireless transmission unit include a signal processing unit that outputs the initial value signal to one or two or more display panel units.   The display device according to claim 5, wherein the wireless reception unit includes an information processing unit that outputs the initial value signal to one or more optical shutters.   The adjustment function part which adjusts the said opening-and-closing timing signal used by the said opening-and-closing control part so that it may match with the said present | current time signal output from the said time reference part of the said optical shutter is included. The display device described in 1.   The display device according to claim 1, wherein the time reference unit is a GPS timing unit using GPS. A display method in which a plurality of images are sequentially and repeatedly displayed on a display screen by a display panel unit, and an opening / closing operation is performed in synchronization with a specific image display in the plurality of images by an optical shutter,
Output a current time signal indicating the current time, output a display timing signal corresponding to the current time signal to the display control unit of the display panel unit,
The display timing signal comprises a repeated display pattern of the plurality of images referring to the current time signal in a certain period,
Output a current time signal indicating the current time, and output an opening / closing timing signal corresponding to the current time signal to the opening / closing controller of the optical shutter ,
The display method according to claim 1, wherein the opening / closing timing signal comprises an opening / closing pattern of the optical shutter referring to the current time signal in a predetermined period . A display operation control program that sequentially and repeatedly displays a plurality of images on a display screen by a display panel unit, and performs an opening and closing operation in synchronization with a specific image display in the plurality of images by an optical shutter,
On the computer,
A function of outputting a current time signal indicating a current time, a function of outputting a display timing signal corresponding to the current time signal to a display control unit of the display panel unit,
A function of outputting an opening / closing timing signal corresponding to the current time signal to the opening / closing controller of the optical shutter;
The display timing signal comprises a repeated display pattern of the plurality of images referring to the current time signal in a certain period,
The display operation control program, wherein the opening / closing timing signal comprises an opening / closing pattern of the optical shutter referring to the current time signal in a predetermined period .

Images