JP2013239945A - Image display device, method for controlling image display device, and image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of preventing a guest user from viewing an OSD image being viewed by a main user.SOLUTION: An image display device (a projector 100) used with first shutter spectacles 200 and second shutter spectacles 300 having left eye shutters (260L, 260R) and right eye shutters (360L, 360R) for switching light transmittance by being periodically opened and closed, respectively, includes: a display unit for periodically displaying images including a left eye image and a right eye image based on image information supplied, and additionally displaying an additional image added to at least one of the left eye image and the right eye image; and a control signal transmitting unit for, when the display unit additionally displays the additional image added to the image being periodically displayed, transmitting a control signal for reducing the light transmittance of the shutters of the second shutter spectacles 300 to a value lower than that of the first shutter spectacles 200, to the first shutter spectacles 200 and the second shutter spectacles 300.

Description

  The present invention relates to an image display device, an image display device control method, and an image display system.

  Conventionally, by using multiple shutter glasses that display multiple images on a single screen in a time-sharing manner and open and close in synchronization with image changes, multiple viewers can view multiple images separately. A technique is known (Patent Document 1). Further, a technique is known in which a viewer can visually recognize a stereoscopic image (3D image) by displaying parallax images corresponding to the left and right eyes using this technique (Patent Document 2).

Japanese Patent Laid-Open No. 9-101749 Japanese Patent Laid-Open No. 61-227498

  In recent years, a scene in which 3D image content is viewed by a plurality of people using an image display apparatus using the above-described technology has been increasing. However, depending on the content displayed by the image display device, the information may not necessarily be shared by all viewers. For example, when the main user operating the image display device opens the menu of the image display device and adjusts the image quality, the menu and the adjustment screen are shown to other viewers (guest users). You may not want to.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An image display device according to this application example includes first and second shutter glasses having shutters for left and right eyes that are periodically opened and closed to switch light transmittance. An image display device to be used, which periodically displays an image including a left-eye image and a right-eye image based on supplied image information, and further displays the left-eye image and the right-eye image. A display unit that additionally displays an additional image on at least one side, and a shutter of the second shutter glasses from the first shutter glasses when the additional image is additionally displayed on the images periodically displayed by the display unit. And a control signal transmission unit that transmits a control signal for lowering the light transmittance of the first shutter glasses to the first shutter glasses.

  According to such an image display device, the display unit periodically displays the image for the left eye and the image for the right eye, and further displays the additional image on at least one of them. The control signal transmission unit outputs a control signal for lowering the light transmittance of the shutter of the second shutter glasses than that of the first shutter glasses when the additional image is added to the periodically displayed image. Transmit to glasses and second shutter glasses. Thereby, when displaying an additional image, the light transmittance of the second shutter glasses can be lowered. Therefore, the user wearing the first shutter glasses may make the additional image visible, and the user wearing the second shutter glasses may not make the additional image visible or make it difficult to view. It becomes possible.

  Application Example 2 In the image display device according to the application example, the display unit additionally displays the additional image on both the left-eye image and the right-eye image.

  According to such an image display device, since the additional image is additionally displayed on both the left-eye image and the right-eye image, the user who wears the first shutter glasses and visually recognizes the additional image can The additional image can be viewed with the right eye. Therefore, the uncomfortable feeling given to the user wearing the first shutter glasses can be reduced. In addition, it is possible to reduce the uncomfortable feeling given to the user who cannot view the image while the additional image is displayed by wearing the second shutter glasses.

  Application Example 3 In the image display device according to the application example, the display unit additionally displays the additional image on one of the left-eye image and the right-eye image, and further displays the additional image immediately after the other image. The additional image is additionally displayed.

  According to such an image display device, the additional image is additionally displayed in succession on the left-eye image and the right-eye image. Thereby, the uncomfortable feeling given to the user who wears the first shutter glasses and visually recognizes the additional image can be reduced.

  Application Example 4 In the image display device according to the application example, the display unit additionally displays the additional image in one of the left-eye image and the right-eye image, and the left-eye image a predetermined number of times. After the right-eye image is displayed, the additional image is additionally displayed as the other image.

  According to such an image display device, an additional image is additionally displayed on one of the left-eye image and the right-eye image, and after the predetermined number of left-eye images and right-eye images are displayed, the other image is displayed. An additional image is additionally displayed. Thereby, it is possible to reduce the uncomfortable feeling given to the user who cannot wear the second shutter glasses while viewing the additional image while the additional image is displayed. That is, flicker recognition can be suppressed.

  Application Example 5 In the image display device according to the application example, the display unit additionally displays the additional image at a ratio of less than half the number of image frames to be displayed.

  According to such an image display device, the additional image is additionally displayed at a ratio of less than half of the number of image frames. Thereby, it is possible to reduce the uncomfortable feeling given to the user who cannot wear the second shutter glasses while viewing the additional image while the additional image is displayed. That is, flicker recognition can be suppressed.

  Application Example 6 In the image display device according to the application example, the display unit additionally displays the additional image at a ratio of 1/6 or less with respect to the number of image frames to be displayed. .

  According to such an image display device, the additional image is additionally displayed at a ratio of 1/6 or less of the number of image frames. Thereby, it is possible to reduce the uncomfortable feeling given to the user who cannot wear the second shutter glasses while viewing the additional image while the additional image is displayed. That is, flicker recognition can be suppressed.

  Application Example 7 In the image display device according to the application example, the additional image is a menu image for setting a function of the image display device.

  According to such an image display device, the additional image is a menu image of the image display device. As a result, the user wearing the first shutter glasses can visually recognize the menu image, and the user wearing the second shutter glasses can be prevented from viewing the menu image.

  Application Example 8 According to the control method of the image display device according to this application example, the first shutter glasses having the left eye shutter and the right eye shutter that are periodically opened and closed to switch the light transmittance and the second shutter glasses are provided. A method for controlling an image display device used together with shutter glasses, which periodically displays an image including a left-eye image and a right-eye image based on supplied image information, and further comprising the left-eye image and A display step of additionally displaying an additional image on at least one of the images for the right eye, and when the additional image is additionally displayed on the image displayed periodically by the display step, the first shutter glasses Control for transmitting a control signal for reducing the light transmittance of the shutter of the second shutter glasses to the first shutter glasses and the second shutter glasses And having No. and transfer step.

  According to such a control method of the image display device, it is possible to reduce the light transmittance of the second shutter glasses when displaying the additional image. Therefore, the user wearing the first shutter glasses may make the additional image visible, and the user wearing the second shutter glasses may not make the additional image visible or make it difficult to view. It becomes possible.

  Application Example 9 An image display system according to this application example is periodically opened and closed and first shutter glasses having shutters for left and right eyes that switch light transmittance by periodically opening and closing. Second shutter glasses having left-eye and right-eye shutters for switching light transmittance and images including left-eye images and right-eye images based on supplied image information are periodically displayed. An image display system comprising: an image display device having a display unit for performing display, wherein the display unit of the image display device can additionally display an additional image on at least one of the left-eye image and the right-eye image When the additional image is added to the image periodically displayed by the display unit, the light transmittance of the shutter of the second shutter glasses from the first shutter glasses is changed. It characterized by having a shutter control unit to grass.

  According to such an image display system, it is possible to reduce the light transmittance of the second shutter glasses when displaying an additional image. Therefore, the user wearing the first shutter glasses may make the additional image visible, and the user wearing the second shutter glasses may not make the additional image visible or make it difficult to view. It becomes possible.

  Application Example 10 An image display system according to this application example is based on shutter glasses having left-eye and right-eye shutters that are periodically opened and closed to switch light transmittance, and supplied image information. An image display system comprising: a display unit that periodically displays an image including a left-eye image and a right-eye image, wherein the display unit of the image display device is for the left eye An additional image can be additionally displayed on at least one of the image and the image for the right eye, and the shutter glasses have a first setting and a second setting, and the display unit periodically displays the image on the image When an additional image is additionally displayed, a shutter control that lowers the light transmittance of the shutter when the shutter glasses are in the second setting than when the shutter glasses are in the first setting. It characterized in that it has a part.

  According to such an image display system, when an additional image is displayed, the light transmittance of the shutter when the shutter glasses are in the second setting is made lower than when the shutter glasses are in the first setting. Therefore, when the shutter glasses are in the first setting, the user wearing the shutter glasses can view the additional image, and when the shutter glasses are in the second setting, the user wearing the shutter glasses The additional image cannot be visually recognized, or the visual recognition can be made difficult.

  Further, when the above-described image display device, image display device control method, and image display system are constructed using a computer provided in the image display device and shutter glasses, the form and the application example are as follows: A program for realizing the function, or a recording medium on which the program is recorded so as to be readable by the computer may be used. Recording media include flexible disk, HDD (Hard Disk Drive), CD-ROM (Compact Disk Read Only Memory), DVD (Digital Versatile Disk), Blu-ray Disc (registered trademark), magneto-optical disk, nonvolatile memory card Various computer-readable media such as internal storage devices (RAM (Random Access Memory), ROM (Read Only Memory), etc.) and external storage devices (USB memory, etc.) of image display devices are used. can do.

1 is a perspective view showing a schematic configuration of an image display system according to an embodiment. The block diagram which shows the internal structure of a projector. The block diagram which shows the internal structure of 1st liquid crystal shutter glasses and 2nd liquid crystal shutter glasses. The timing chart for demonstrating operation | movement of an image display system. It is explanatory drawing of the image which a projector displays, (a) is explanatory drawing of a normal image, (b) is explanatory drawing of the image which superimposed the OSD image. The flowchart of the judgment process performed when a projector switches an image frame. The flowchart of a process of 1st liquid crystal shutter glasses and 2nd liquid crystal shutter glasses. The timing chart for demonstrating operation | movement of the image display system in the case of displaying an OSD image with a 1st pattern. The timing chart for demonstrating operation | movement of the image display system in the case of displaying an OSD image with a 2nd pattern.

  Hereinafter, as an embodiment, a projector as an image display device that modulates light emitted from a light source based on image information to form an optical image and projects the optical image on an external screen or the like, and a first shutter An image display system having first liquid crystal shutter glasses as glasses and second liquid crystal shutter glasses as second shutter glasses will be described.

(Embodiment)
FIG. 1 is a perspective view illustrating a schematic configuration of an image display system according to the present embodiment.
As shown in FIG. 1, the image display system 1 is a system that allows a viewer to recognize a stereoscopic image using binocular parallax, and includes a projector 100, first liquid crystal shutter glasses 200, and a second liquid crystal shutter. The glasses 300 are provided.

  The projector 100 is configured to include a housing 5 that accommodates an apparatus main body (an image projection unit 10 and the like described later), and an operation receiving unit 21 on the top surface 5t of the housing 5 where an input operation is performed by a user. Is arranged. An image information input unit 30 having a plurality of input terminals is provided on the back surface 5b of the housing 5, and image information is input to the image information input unit 30 from an external image supply device (not shown). The Although not shown here, a projection lens is exposed on the front surface of the housing 5, and an image based on the image information is projected from the projection lens onto a front projection surface (for example, a screen) SC.

  The image information input unit 30 receives left-eye image information representing a left-eye image and right-eye image information representing a right-eye image, and the projector 100 displays an image for the left eye. And the right-eye image are time-divided in units of frames and projected (displayed) alternately on the projection screen SC. In addition, the projector 100 includes an infrared transmission unit 50 that transmits an infrared control signal for synchronizing with switching between an image for the left eye and an image for the right eye. In the present embodiment, an infrared transmitter 50 is provided on the back surface 5 b of the housing 5.

  The first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 are worn by a viewer who views an image projected by the projector 100, and the left-eye liquid crystal shutter facing the viewer's left eye. 260L (360L) and a liquid crystal shutter 260R (360R) for the right eye facing the right eye. Although not shown, an infrared receiver for receiving an infrared synchronization signal transmitted from the projector 100 is provided on the front surfaces of the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. In the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300, the image for the left eye is recognized only by the viewer's left eye, and the image for the right eye is recognized only by the viewer's right eye. The left and right liquid crystal shutters 260L (360L) and 260R (360R) are opened in synchronization with the control signal.

  Further, the liquid crystal shutter glasses are placed in the main state for use by the main user or used by the guest user on the side surfaces (the vine portions) of the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. A guest setting switch 250 (350) for switching whether to enter the guest state.

FIG. 2 is a block diagram showing an internal configuration of the projector 100 according to the present embodiment.
As shown in FIG. 2, the projector 100 includes an image projection unit 10, a control unit 20, an operation reception unit 21, an image information input unit 30, an image information determination unit 31, an image processing unit 32, an OSD processing unit 33, and an infrared transmission unit. 50 etc.

  The image projection unit 10 includes a light source device 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive unit 14, and the like. The image projection unit 10 modulates the light emitted from the light source device 11 with the liquid crystal light valves 12R, 12G, and 12B to form an image (image light). Then, the formed image is enlarged and projected from the projection lens 13 toward the front, that is, in a direction substantially perpendicular to the front surface of the housing 5, and displayed on the projection surface SC or the like.

  The light source device 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. Has been. The light emitted from the light source device 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), which are the three primary colors of light by a color separation optical system (not shown), After being separated into blue (B) color light components, they are incident on the liquid crystal light valves 12R, 12G, and 12B, respectively.

  The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal light valves 12R, 12G, and 12B are formed with a plurality of pixels arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel. When a driving voltage corresponding to the input image information is applied to each pixel by driving the liquid crystal driving unit 14, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source device 11 is modulated by transmitting through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to form a color image, and then enlarged and projected from the projection lens 13.

  The control unit 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, a nonvolatile ROM (Read Only Memory), and the like, and is stored in the ROM. The operation of the projector 100 is comprehensively controlled by the CPU operating according to the control program. That is, the control unit 20 functions as a computer.

  The operation accepting unit 21 accepts a user's input operation, and includes a plurality of operation keys for the user to give various instructions to the projector 100. The operation keys included in the operation accepting unit 21 of the present embodiment include a power key for switching on / off the power, a menu key for displaying a menu image for various settings, a direction used for selecting an item in the menu image, and the like. There are keys, a decision key for confirming the selected item, and the like. When the user operates various operation keys of the operation accepting unit 21, the operation accepting unit 21 accepts this input operation and outputs an operation signal corresponding to the operation content of the user to the control unit 20. The operation receiving unit 21 may be configured using a remote control (not shown) capable of remote operation. In this case, the remote controller transmits an operation signal such as an infrared ray corresponding to the operation content of the user, and a receiving unit (not shown) receives the signal and transmits it to the control unit 20.

  The image information input unit 30 receives image information for the left eye and the right eye from an external image supply device (not shown) such as a personal computer or various video playback devices. Then, the image information input unit 30 outputs the input image information to the image information determination unit 31.

  The image information determination unit 31 analyzes the image information input from the image information input unit 30, and 3D image information (three-dimensional image information, that is, an image having image information for the left eye and image information for the right eye). Information) or 2D image information (two-dimensional image information), and notifies the control unit 20 of the determination. Further, the image information determination unit 31 converts the image information into image information in a format that can be processed by the image processing unit 32, and outputs the image information to the image processing unit 32.

  The image processing unit 32 converts the left-eye and right-eye image information input from the image information determination unit 31 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image information is for each of the R, G, and B color lights, and is composed of a plurality of pixel values corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. The pixel value determines the light transmittance of the corresponding pixel, and the intensity (gradation) of light emitted from each pixel is defined by the pixel value. In addition, the image processing unit 32 performs image quality adjustment processing for adjusting brightness, contrast, and the like on the converted image information based on an instruction from the control unit 20 as necessary.

  The image processing unit 32 includes an image memory (not shown) that temporarily stores image information. The image information for the left eye and the right eye is subjected to various processes and then is stored in units of frames. Is remembered. Then, the image processing unit 32 outputs the left-eye and right-eye image information stored in the image memory to the OSD processing unit 33 alternately frame by frame based on an instruction from the control unit 20.

  The OSD processing unit 33 superimposes and displays an OSD (on-screen display) image such as a menu image or a message image on the image frame based on the input image information based on an instruction from the control unit 20. Process. In the present embodiment, the OSD processing unit 33 superimposes the OSD image on both the left-eye image frame and the right-eye image frame based on an instruction from the control unit 20. The OSD processing unit 33 includes an OSD memory (not shown), and stores OSD image information representing graphics, fonts, and the like for forming an OSD image. When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 33 reads the necessary OSD image information from the OSD memory, and the image processing unit so that the OSD image is superimposed at a predetermined position on the image frame. This OSD image information is combined with the image information input from 32. The image information combined with the OSD image information is output to the liquid crystal drive unit 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 33 outputs the image information input from the image processing unit 32 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the OSD processing unit 33, the liquid crystal light valves 12R, 12G, and 12B form images according to the image information, and this An image is projected from the projection lens 13. As a result, the left-eye image and the right-eye image are alternately displayed on the projection screen SC in units of frames. The image processing unit 32, the OSD processing unit 33, and the image projection unit 10 at this time correspond to a display unit.

  The infrared transmission unit 50 includes an encoder for infrared communication, an infrared light emitting device (both not shown), etc., and modulates control signal information input from the control unit 20 with the encoder. Send to the outside as a blinking signal. In the present embodiment, the infrared transmission unit 50 is built in the projector 100, but may be an external device that is externally attached to the projector 100 with a cable or the like.

FIG. 3 is a block diagram showing an internal configuration of the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300.
The first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 have the same configuration. As shown in FIG. 3, in addition to the liquid crystal shutters 260L (360L) and 260R (360R) described above, the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 include an infrared receiving unit 210 (310), The controller 220 (320), the shutter driver 230 (330), the shutter closing continuation flag 240 (340), and the guest setting switch 250 (350) are included.

  The infrared receiving unit 210 (310) includes an infrared receiving module and the like, receives a control signal that is an infrared signal emitted from the projector 100, and notifies the control unit 220 (320). As the types of control signals, an “L-OP” signal for opening the left-eye liquid crystal shutter 260L (360L) and an “L-CL” signal for closing the left-eye liquid crystal shutter 260L (360L) are used. “R-OP” signal for opening the right-eye liquid crystal shutter 260R (360R), “R-CL” signal for closing the right-eye liquid crystal shutter 260R (360R), and “L- There is a “CLC” signal for preventing the liquid crystal shutter from being opened even when an “OP” signal or an “R-OP” signal is received.

  The control unit 220 (320) generates control information for controlling opening and closing of the liquid crystal shutters 260L (360L) and 260R (360R) based on the received control signal, and outputs the control information to the shutter driving unit 230 (330). . In addition, the control unit 220 (320) reads the setting state (“main state (off)” or “guest state (on)”) of the guest setting switch 250 (350). Further, the control unit 220 (320) accesses the shutter closing continuation flag 240 (340) to set, clear, or refer to the shutter closing continuation flag 240 (340).

  The shutter driving unit 230 (330) drives opening / closing (opening and closing) of the liquid crystal shutters 260L (360L) and 260R (360R) based on the input control information.

  The liquid crystal shutters 260L (360L) and 260R (360R) each have a configuration in which polarizing plates are attached to both the front and back sides of the liquid crystal panel. The liquid crystal shutter 260L (360L) is switched between an open state in which light incident on the left eye is transmitted and a closed state in which light incident on the left eye is blocked by driving the shutter driving unit 230 (330). (360R) switches between an open state in which light incident on the right eye is transmitted and a closed state in which light incident on the right eye is blocked by driving the shutter drive unit 230 (330).

  The shutter closing continuation flag 240 (340) is displayed when the first liquid crystal shutter glasses 200 or the second liquid crystal shutter glasses 300 receive a shutter open signal (“L-OP” or “R-OP”). This is a flag for determining whether to open 260L, 360L, 260R or 360R or to continue the closed state. The shutter closing continuation flag 240 (340) is constituted by a memory. The shutter closing continuation flag 240 (340) is set by the control unit 220 (320) and cleared by the control unit 220 (320). When the shutter closing continuation flag 240 (340) is set, the control unit 220 (320) does not open the liquid crystal shutter (that is, continues the closed state).

  The guest setting switch 250 (350) is a switch for the user to instruct whether to set the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 to the “main state” or the “guest state”. . In the present embodiment, the “main state” is set when the switch is off, and the “guest state” is set when the switch is on. The setting state of the guest setting switch 250 (350) is read by the control unit 220 (320). In the present embodiment, it is assumed that the first liquid crystal shutter glasses 200 are set to off, and the second liquid crystal shutter glasses 300 are set to on.

  The image display system 1 is configured as described above, and the image processing unit 32 of the projector 100 switches between displaying an image for the left eye and displaying an image for the right eye. Then, the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 switch the liquid crystal shutters 260L, 260R, 360L, 360R to be opened based on the control signal transmitted from the projector 100, so The image for the right eye can be recognized only by the left eye, and the image for the right eye can be recognized only by the right eye.

Here, operations of the projector 100, the first liquid crystal shutter glasses 200, and the second liquid crystal shutter glasses 300 of the image display system 1 when displaying a 3D image will be described.
FIG. 4 is a timing chart for explaining the operation of the image display system 1.

  In the timing chart of FIG. 4, the display image displayed by the projector 100, the control signal output by the projector 100, the open / close state of the left-eye liquid crystal shutter 260L of the first liquid crystal shutter glasses 200, and the right-eye liquid crystal shutter 260R. The open / close state, the open / close state of the left-eye liquid crystal shutter 360L of the second liquid crystal shutter glasses 300, and the open / close state of the right-eye liquid crystal shutter 360R are shown. In FIG. 4, the horizontal axis is the time axis.

  The projector 100 includes a left-eye image L1, a right-eye image R1, a left-eye image L2, a right-eye image R2, a left-eye image L3, a right-eye image R3, and a left-eye image L4. Display the display image.

  Then, after the display of the left-eye images L1, L2, L3, and L4 is started, the projector 100 outputs a shutter open signal “L-OP” for opening the left-eye liquid crystal shutters 260L and 360L to the first liquid crystal. The information is transmitted to the shutter glasses 200 and the second liquid crystal shutter glasses 300.

  Furthermore, the projector 100 outputs a shutter close signal “L-CL” for closing the left-eye liquid crystal shutters 260L and 360L before the display of the left-eye images L1, L2, L3, and L4 is finished. The information is transmitted to the shutter glasses 200 and the second liquid crystal shutter glasses 300. Note that the projector 100 does not individually transmit control signals to the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. That is, the control signal transmitted by the infrared transmission unit 50 of the projector 100 is received by the infrared reception unit 210 of the first liquid crystal shutter glasses 200 and the infrared reception unit 310 of the second liquid crystal shutter glasses 300, respectively. .

  After the display of the right-eye images R1, R2, R3, and R4 is started, the projector 100 sends a shutter-open signal “R-OP” for opening the right-eye liquid crystal shutters 260R and 360R to the first liquid crystal shutter glasses. 200 and the second liquid crystal shutter glasses 300.

  Furthermore, the projector 100 outputs a shutter closing signal “R-CL” for closing the right-eye liquid crystal shutters 260R and 360R before the display of the right-eye images R1, R2, R3, and R4 is finished. The information is transmitted to the shutter glasses 200 and the second liquid crystal shutter glasses 300.

  Upon receiving the shutter open signal “L-OP”, the first liquid crystal shutter glasses 200 open the left-eye liquid crystal shutter 260L. In FIG. 4, the opening operation is represented by the rising edge of the waveform. That is, the “Low” state of the waveform indicates that the liquid crystal shutter is closed, and the “High” state indicates that the liquid crystal shutter is open. The first liquid crystal shutter glasses 200 close the left-eye liquid crystal shutter 260 </ b> L when receiving the shutter close signal “L-CL”. In FIG. 4, the blockage is represented by the falling edge of the waveform.

  Upon receiving the shutter open signal “R-OP”, the first liquid crystal shutter glasses 200 open the right-eye liquid crystal shutter 260R. In FIG. 4, the release is represented by the rising edge of the waveform. The first liquid crystal shutter glasses 200 close the right-eye liquid crystal shutter 260 </ b> R when receiving the shutter close signal “R-CL”. In FIG. 4, the blockage is represented by the falling edge of the waveform.

  Upon receiving the shutter open signal “L-OP”, the second liquid crystal shutter glasses 300 open the left-eye liquid crystal shutter 360L. The second liquid crystal shutter glasses 300 close the left-eye liquid crystal shutter 360 </ b> L when receiving the shutter close signal “L-CL”.

  Upon receiving the shutter open signal “R-OP”, the second liquid crystal shutter glasses 300 open the right-eye liquid crystal shutter 360 </ b> R. The second liquid crystal shutter glasses 300 close the right-eye liquid crystal shutter 360 </ b> R upon receiving the shutter close signal “R-CL”.

  As described above, the projector 100 switches between the display of the image for the left eye and the display of the image for the right eye. Then, the projector 100 transmits a control signal to the liquid crystal shutter glasses (the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300). The first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 switch opening and closing of the liquid crystal shutters 260L, 260R, 360L, and 360R based on a control signal transmitted from the projector 100. Accordingly, the projector 100, the first liquid crystal shutter glasses 200, and the second liquid crystal shutter glasses 300 can be synchronized in a time division manner.

Next, an image displayed by the projector 100 will be described.
FIG. 5 is an explanatory diagram of an image displayed by the projector 100, (a) is an explanatory diagram of a normal image, and (b) is an explanatory diagram of an image on which an OSD image is superimposed.

  As shown in FIG. 5A, a landscape image G1 is displayed as a normal image. FIG. 5B shows a landscape image G2 in which the menu image M1 is superimposed (additionally displayed) by the OSD processing unit 33 on the same image as the landscape image G1. The menu image M1 is displayed by, for example, pressing a menu key provided in the operation reception unit 21.

  Here, the main user wearing the first liquid crystal shutter glasses 200 visually recognizes the menu image M1, and the guest user wearing the second liquid crystal shutter glasses 300 does not visually recognize the menu image M1. The process will be described.

First, determination processing performed when the projector 100 switches image frames based on image information will be described.
FIG. 6 is a flowchart of determination processing performed when the projector 100 switches image frames.

  Based on the image information determined by the image information determination unit 31, the control unit 20 determines whether to superimpose (additionally display) the OSD image (menu image M1) on the left-eye or right-eye image frame. (Step S101). When superimposing the OSD image (step S101: YES), the control unit 20 instructs the infrared transmission unit 50 to transmit the shutter closing continuation signal “CLC” (step S102). The control unit 20 at this time corresponds to a control signal transmission unit. It also corresponds to a shutter control unit. Then, the determination process for switching the image frame is ended.

  When the OSD image is not superimposed (step S101: NO), the determination process is terminated. In the determination process, descriptions of the shutter open signal “L-OP” and the shutter open signal “R-OP” transmitted after the liquid crystal shutter close continuation signal “CLC” are omitted.

Next, a process performed when the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 receive a control signal will be described. The first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300 have the same configuration and have a built-in program for performing the same processing.
FIG. 7 is a flowchart of the processing of the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300.

  When the infrared receiver 210 (310) receives a control signal from the projector 100, the controller 220 (320) determines whether the received control signal is a shutter open signal (“L-OP” or “R-OP”). Judgment is made (step S201). When it is a shutter open signal (step S201: YES), the control unit 220 (320) determines whether the guest setting switch 250 (350) is turned on, that is, whether the guest is in the guest state (step S202). .

  If the guest setting switch 250 (350) is not turned on (step S202: NO), the control unit 220 (320) issues an instruction to the shutter drive unit 230 (330), and the left-eye liquid crystal represented by the shutter open signal. The shutter 260L (360L) or the right-eye liquid crystal shutter 260R (360R) is opened (step S204). Then, the process proceeds to step S201.

  If the guest setting switch 250 (350) is turned on (step S202: YES), the control unit 220 (320) determines whether or not the shutter closing continuation flag 240 (340) is set (step S203). If the shutter closing continuation flag 240 (340) is not set (step S203: NO), the process proceeds to step S204 to open the liquid crystal shutter.

  If the shutter closing continuation flag 240 (340) is set (step S203: YES), the control unit 220 (320) clears the shutter closing continuation flag 240 (340) (step S205). Then, the process proceeds to step S201.

  If the received control signal is not a shutter open signal (step S201: NO), the control unit 220 (320) determines whether or not the received control signal is a shutter close signal (step S206). When it is a shutter closing signal (step S206: YES), the control unit 220 (320) issues an instruction to the shutter driving unit 230 (330), and the left-eye liquid crystal shutter 260L (360L) represented by the shutter opening signal, Alternatively, the right-eye liquid crystal shutter 260R (360R) is closed (step S207). Then, the process proceeds to step S201.

  If the received control signal is not a shutter close signal (step S206: NO), the control unit 220 (320) determines whether or not the received control signal is a shutter close continuation signal (step S208). When it is a shutter closing continuation signal (step S208: YES), the control unit 220 (320) determines whether or not the guest setting switch 250 (350) is turned on (step S209).

  If the guest setting switch 250 (350) is turned on (step S209: YES), the control unit 220 (320) sets the shutter closing continuation flag 240 (340) (step S210). Then, the process proceeds to step S201. If the guest setting switch 250 (350) is not turned on (step S209: NO), the process proceeds to step S201. If the received control signal is not a shutter closing continuation signal (step S208: NO), the process proceeds to step S201.

  As described above, when the projector 100 transmits the liquid crystal shutter closing continuation signal, the liquid crystal shutter glasses set the shutter closing continuation flag 240 (340). The liquid crystal shutter glasses do not open the liquid crystal shutter if the guest setting switch 250 (350) is on and the shutter close continuation flag 240 (340) is set when the shutter open signal is received. In addition, the closed state is continued.

Next, the operation of the image display system 1 in the case of the first pattern in which the projector 100 displays the OSD image on the continuous left-eye image and right-eye image will be described.
FIG. 8 is a timing chart for explaining the operation of the image display system 1 when displaying an OSD image in the first pattern. Here, the number of image frames on which the projector 100 superimposes (additionally displays) the OSD image is a ratio less than half of the number of image frames displayed by the projector 100. Also, the guest setting switch 250 of the first liquid crystal shutter glasses 200 is off (main state), and the guest setting switch 350 of the second liquid crystal shutter glasses 300 is on (guest state).

  As shown in the timing chart of FIG. 8, the projector 100 displays the OSD image superimposed on the display image L2. At this time, the projector 100 transmits a shutter closing continuation signal “CLC” as a control signal. Further, a shutter open signal “L-OP” is transmitted.

  Upon receiving the shutter open signal “L-OP”, the first liquid crystal shutter glasses 200 open the left-eye liquid crystal shutter 260L. Therefore, the main user wearing the first liquid crystal shutter glasses 200 can visually recognize the OSD image.

  Even if the second liquid crystal shutter glasses 300 receive the shutter open signal “L-OP”, the second liquid crystal shutter glasses 300 are in the guest state and have received the shutter close continuation signal “CLC”. continue. Therefore, the guest user wearing the second liquid crystal shutter glasses 300 cannot visually recognize the OSD image.

  Next, the projector 100 displays the OSD image superimposed on the display image R2. At this time, the projector 100 transmits a shutter closing continuation signal “CLC”. Further, a shutter open signal “R-OP” is transmitted.

  Upon receiving the shutter open signal “R-OP”, the first liquid crystal shutter glasses 200 open the right-eye liquid crystal shutter 260R. Therefore, the main user wearing the first liquid crystal shutter glasses 200 can visually recognize the OSD image.

  Even if the second liquid crystal shutter glasses 300 receive the shutter open signal “R-OP”, the second liquid crystal shutter glasses 300 receive the shutter close continuation signal “CLC” in the guest state. continue. Therefore, the guest user wearing the second liquid crystal shutter glasses 300 cannot visually recognize the OSD image.

Next, the operation of the image display system 1 in the case of the second pattern in which the projector 100 displays the OSD image on the discontinuous left eye image and right eye image will be described.
FIG. 9 is a timing chart for explaining the operation of the image display system 1 when the OSD image is displayed in the second pattern. Here, the number of image frames on which the projector 100 superimposes (additionally displays) the OSD image is a ratio less than half of the number of image frames displayed by the projector 100. Also, the guest setting switch 250 of the first liquid crystal shutter glasses 200 is off (main state), and the guest setting switch 350 of the second liquid crystal shutter glasses 300 is on (guest state).

  In the timing chart of FIG. 9, the projector 100 displays the OSD image superimposed on the display image L2. At this time, the projector 100 transmits a shutter closing continuation signal “CLC”. Further, a shutter open signal “L-OP” is transmitted.

  Upon receiving the shutter open signal “L-OP”, the first liquid crystal shutter glasses 200 open the left-eye liquid crystal shutter 260L. Therefore, the main user wearing the first liquid crystal shutter glasses 200 can visually recognize the OSD image.

  Even if the second liquid crystal shutter glasses 300 receive the shutter open signal “L-OP”, the second liquid crystal shutter glasses 300 are in the guest state and have received the shutter close continuation signal “CLC”. continue. Therefore, the guest user wearing the second liquid crystal shutter glasses 300 cannot visually recognize the OSD image.

  Next, after displaying a plurality of image frames (in this case, display images R2, L3, R3, and L4), the projector 100 causes the OSD image to be displayed superimposed on the display image R4. At this time, the projector 100 transmits a shutter closing continuation signal “CLC”. Further, a shutter open signal “R-OP” is transmitted.

  Upon receiving the shutter open signal “R-OP”, the first liquid crystal shutter glasses 200 open the right-eye liquid crystal shutter 260R. Therefore, the main user wearing the first liquid crystal shutter glasses 200 can visually recognize the OSD image.

  Even if the second liquid crystal shutter glasses 300 receive the shutter open signal “R-OP”, the second liquid crystal shutter glasses 300 receive the shutter close continuation signal “CLC” in the guest state. continue. Therefore, the guest user wearing the second liquid crystal shutter glasses 300 cannot visually recognize the OSD image.

  In the “control signal for lowering the light transmittance of the shutter of the second shutter glasses than the first shutter glasses” described in the claims, the control signal of one type is “ This includes the case where the shutter closing continuation signal “CLC” is transmitted. That is, although the same control signal is transmitted to the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300, the second liquid crystal shutter glasses 200 result in the second liquid crystal shutter glasses 200 as a result. The signal that can reduce the light transmittance of the shutter of the liquid crystal shutter glasses 300 (in the embodiment, the shutter closing continuation signal “CLC”) is also “the shutter light of the second shutter glasses from the first shutter glasses. Is included in the control signal for lowering the transmittance.

According to the embodiment described above, the following effects can be obtained.
(1) The projector 100 transmits a shutter closed continuation signal “CLC” when additionally displaying an OSD image. When the second liquid crystal shutter glasses 300 in which the guest setting switch 350 is turned on (guest state) receive the shutter close continuation signal “CLC”, the second liquid crystal shutter glasses 300 set the shutter close continuation flag 340. Then, when the shutter open signal “L-OP” or “R-OP” is received from the projector 100, the second liquid crystal shutter glasses 300 continue to close the liquid crystal shutter 360L or 360R. A guest user wearing the shutter glasses 300 cannot visually recognize the OSD image. Thus, the main user wearing the first liquid crystal shutter glasses 200 can visually recognize the OSD image, and the guest user wearing the second liquid crystal shutter glasses 300 can not visually recognize the OSD image. It becomes possible to do. That is, the guest user who does not need to visually recognize the OSD image can be prevented from visually recognizing the OSD image.

  (2) Since the projector 100 displays the OSD image on both the left-eye image and the right-eye image, the main user who wears the first liquid crystal shutter glasses 200 and visually recognizes the additional image is the right-eye and left-eye. The OSD image can be visually recognized with the eyes, and the uncomfortable feeling is reduced. In addition, when the second liquid crystal shutter glasses 300 are attached and the OSD image is displayed, the uncomfortable feeling given to the guest user who cannot visually recognize the image is reduced.

  (3) In the first pattern shown in FIG. 8, the projector 100 displays the OSD image continuously in the left eye image and the right eye image. Thereby, the uncomfortable feeling given to the main user who wears the first liquid crystal shutter glasses 200 and visually recognizes the OSD image can be reduced.

  (4) In the second pattern shown in FIG. 9, the projector 100 displays the OSD image as the left eye image, displays the image frame a plurality of times, and then displays the OSD as the other image (right eye image). Display an image. Thereby, it is possible to reduce the uncomfortable feeling given to the guest user who cannot wear the second liquid crystal shutter glasses 300 while the OSD image is displayed. That is, the guest user's recognition of flicker can be suppressed.

  (5) The projector 100 additionally displays the OSD image with the number of frames that is less than half the number of frames to be displayed. Thereby, it is possible to reduce the uncomfortable feeling given to the guest user who cannot wear the second liquid crystal shutter glasses 300 while the OSD image is displayed. That is, the guest user's recognition of flicker can be suppressed.

  (6) The OSD image that the projector 100 superimposes on the image is the menu image M1 of the projector 100. Thereby, the main user wearing the first liquid crystal shutter glasses 200 visually recognizes the menu image M1, and the guest user wearing the second liquid crystal shutter glasses 300 cannot visually recognize the menu image M1. It becomes possible to do. Therefore, it is suitable for guest users who do not need to visually recognize the menu image M1.

  In addition, it is not limited to embodiment mentioned above, It is possible to implement by adding various change, improvement, etc. A modification will be described below.

  (Modification 1) In the above embodiment, the projector 100 displays the OSD image with the number of frames less than half of the number of frames to be displayed, but the frame with a ratio of 1/6 or less of the number of frames to be displayed. OSD images may be displayed in numbers. In this way, the influence of flicker can be reduced. Further, the flicker generated at this time can be accommodated to the extent of the difference between the frequencies of the NTSC signal and the PAL signal, and therefore has little visual influence.

  (Modification 2) In the above embodiment, the OSD image is displayed on the first pattern for displaying the OSD image on the continuous image for the left eye and the image for the right eye, and on the image for the left eye and the image for the right eye that are not continuous. Although the second pattern to be displayed has been described, the OSD image may be dispersively displayed on the left eye image and the right eye image.

  (Modification 3) In the above embodiment, the shutter closing continuation signal “CLC” is sent immediately before the left eye and right eye shutter opening signals “L-OP” and “R-OP”. The shutter closing continuation signal “CLC” may be sent only immediately before the eye shutter opening signal “L-OP”. Then, the second liquid crystal shutter glasses 300 receive the shutter closing continuation signal “CLC”, then count the number of times the shutter opening signal “R-OP” is received, and the shutter opening signal “R-OP” after a predetermined number of times. ”Is regarded as an object to be kept closed, and the liquid crystal shutter 360R is not opened. The projector 100 displays the display image for the right eye including the OSD image at the timing of the shutter opening signal “R-OP” a predetermined number of times after the shutter closing continuation signal “CLC” is sent. Thus, in the image display system 1, if the predetermined number of times is determined in advance, the transmission procedure of the shutter closed continuation signal “CLC” can be reduced.

  (Modification 4) In the above embodiment, an infrared control signal is sent from the infrared transmitter 50 of the projector 100 to the infrared receiver 210 (310) of the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. However, the control signal is not limited to infrared rays. For example, optical communication other than infrared light, radio communication radio waves, or the like may be used.

  (Modification 5) In the above embodiment, the projector 100 transmits the same control signal in one direction to the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. It is good also as what can transmit / receive a signal. Further, the projector 100 may individually transmit control signals to the first liquid crystal shutter glasses 200 and the second liquid crystal shutter glasses 300. For example, the setting information of the guest setting switch 250 (350) is transmitted from the liquid crystal shutter glasses side to the projector 100. Then, the projector 100 transmits a shutter open signal to the first liquid crystal shutter glasses 200 based on the setting information of the guest setting switch 250 (350) during the image frame for displaying the OSD image, and the second The liquid crystal shutter glasses 300 can be processed so as not to transmit a shutter open signal. This eliminates the need to transmit a shutter closing continuation signal.

  (Modification 6) In the above embodiment, the OSD image superimposed on the image by the projector 100 is the menu image M1, but is not limited to the menu image M1. For example, the OSD image may be a message image.

  (Modification 7) In the above embodiment, the image frames displayed by the image projection unit 10 are the left-eye image and the right-eye image in the first order. However, the order is not limited to this. But you can.

  (Modification 8) In the above embodiment, the additional image (OSD image) is displayed superimposed on the image content. However, the additional image (OSD image) is not necessarily displayed superimposed on the image content. It may be arranged at a position that does not overlap the image content. Any display other than the original image content to be viewed displayed in the display area of the projector 100 (image display device) may be used.

  (Modification 9) In the above-described embodiment, the projector 100 corresponding to the input of 3D image information is described as an example. However, when 2D image information is input, 3D image information is generated inside the projector. It is also possible to apply to a projector that can be converted into

  (Modification 10) In the above embodiment, the projector 100 is described as an example of the image display device, but the image display device is not limited to the projector. For example, the present invention can be applied to a rear projector, a liquid crystal display, a plasma display, an organic EL (Electro Luminescence) display, a television receiver, and the like that are integrally provided with a transmissive screen.

  (Modification 11) In the embodiment described above, the light source device 11 is configured to include the discharge-type light source lamp 11a. It can also be used.

  (Modification 12) In the above-described embodiment, the projector 100 uses the transmissive liquid crystal light valves 12R, 12G, and 12B as the light modulator. However, the projector 100 uses a reflective light modulator such as a reflective liquid crystal light valve. It is also possible to use. In addition, it is possible to use a micromirror array device that modulates light emitted from a light source by controlling the emission direction of incident light for each micromirror as a pixel.

  DESCRIPTION OF SYMBOLS 1 ... Image display system, 5 ... Housing, 5b ... Back surface, 5t ... Top surface, 10 ... Image projection part, 11 ... Light source device, 11a ... Light source lamp, 11b ... Reflector, 12R, 12G, 12B ... Liquid crystal light valve, DESCRIPTION OF SYMBOLS 13 ... Projection lens, 14 ... Liquid crystal drive part, 20 ... Control part, 21 ... Operation reception part, 30 ... Image information input part, 31 ... Image information determination part, 32 ... Image processing part, 33 ... OSD processing part, 50 ... Infrared transmitting unit, 100 ... projector, 200 ... first liquid crystal shutter glasses, 210 ... infrared receiving unit, 220 ... control unit, 230 ... shutter driving unit, 240 ... shutter closing continuation flag, 250 ... guest setting switch, 260L ... left Liquid crystal shutter for eyes, 260R ... Liquid crystal shutter for right eye, 300 ... Second liquid crystal shutter glasses, 310 ... Infrared receiver, 340 ... Shutter Closed continuation flag, 350 ... guest setting switch, 360L ... left-eye liquid crystal shutter, a liquid crystal shutter for 360R ... right eye.

Claims (10)

An image display device used together with first shutter glasses and second shutter glasses having left and right eye shutters that are periodically opened and closed to switch light transmittance,
An image including a left-eye image and a right-eye image based on the supplied image information is periodically displayed, and an additional image is additionally displayed on at least one of the left-eye image and the right-eye image. A display unit;
A control signal for lowering the light transmittance of the shutter of the second shutter glasses than the first shutter glasses when the additional image is additionally displayed on the image periodically displayed by the display unit; A control signal transmission unit for transmitting the first shutter glasses and the second shutter glasses;
An image display device comprising: The image display device according to claim 1,
The display unit additionally displays the additional image on both the left-eye image and the right-eye image. The image display device according to claim 2,
The display unit displays the additional image on one of the left-eye image and the right-eye image, and further displays the additional image on the other image immediately after the additional display. . The image display device according to claim 2,
The display unit displays the additional image on one of the left-eye image and the right-eye image, displays the left-eye image and the right-eye image a predetermined number of times, and then displays the additional image on the other image. An image display device that additionally displays the additional image. The image display device according to claim 1,
The display unit additionally displays the additional image at a ratio of less than half of the number of image frames to be displayed. The image display device according to claim 1,
The display unit additionally displays the additional image at a ratio of 1/6 or less with respect to the number of image frames to be displayed. The image display device according to claim 1,
The image display device, wherein the additional image is a menu image for setting a function of the image display device. A control method of an image display device used together with first shutter glasses and second shutter glasses having shutters for left and right eyes that are periodically opened and closed to switch light transmittance,
An image including a left-eye image and a right-eye image based on the supplied image information is periodically displayed, and an additional image is additionally displayed on at least one of the left-eye image and the right-eye image. A display step;
A control signal for lowering the light transmittance of the shutter of the second shutter glasses than the first shutter glasses when the additional image is additionally displayed on the periodically displayed image by the display step, A control signal transmission step for transmitting to the first shutter glasses and the second shutter glasses;
A control method for an image display device, comprising: First shutter glasses having left-eye and right-eye shutters that are periodically opened and closed to switch light transmittance;
Second shutter glasses having left-eye and right-eye shutters that are periodically opened and closed to switch light transmittance;
An image display device having a display unit that periodically displays an image including a left-eye image and a right-eye image based on supplied image information;
An image display system comprising:
The display unit of the image display device can additionally display an additional image on at least one of the left-eye image and the right-eye image,
A shutter control unit configured to lower the light transmittance of the shutter of the second shutter glasses than the first shutter glasses when the additional image is additionally displayed on the image periodically displayed by the display unit; An image display system characterized by that. Shutter glasses having shutters for the left eye and the right eye that are periodically opened and closed to switch the light transmittance;
An image display device having a display unit that periodically displays an image including a left-eye image and a right-eye image based on supplied image information;
An image display system comprising:
The display unit of the image display device can additionally display an additional image on at least one of the left-eye image and the right-eye image,
The shutter glasses have a first setting and a second setting,
When the additional image is added to the image periodically displayed by the display unit, the shutter light when the shutter glasses are set to the second setting than when the shutter glasses are set to the first setting. An image display system comprising a shutter control unit for reducing transmittance.

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