JP5240197B2 - Image display device and image display method - Google Patents

Description

  The present invention relates to an image display apparatus and an image display method, and more particularly to an image display apparatus and an image display method that can provide image contents to a user, an authenticated person, and the like.

  Flat panel displays such as liquid crystal displays and plasma displays are widely applied from mobile devices such as mobile phones to large devices such as public displays. Many of these displays have been focused on development in terms of wide viewing angle, high brightness, and high image quality, and it has been required to display them clearly and easily from any angle.

  On the other hand, some contents displayed on the display, such as secret information and private data, are not desired to be seen by others. As ubiquitous progresses with the development of information equipment, it is an important issue to prevent others from seeing the content even in the public where there are many unspecified people. In addition, even in the office, there are cases where confidential information that the person passing behind the seat does not want to see is handled.

  Some displays mounted on mobile phones and the like are provided with an optical shielding plate (louver) so that display contents can be seen only from a specific direction. However, such a display is not sufficient from the viewpoint of maintaining confidentiality because the display contents can be viewed from behind.

  As a technique for solving the above problem, there is an image display device disclosed in Patent Document 1. This image display device provides an image (hereinafter referred to as a secret image) only to a person wearing glasses having an image selection function, and shows another image (hereinafter referred to as a public image) to other persons. It is.

  FIG. 1 is a diagram illustrating a configuration of an image display device disclosed in Patent Document 1. As illustrated in FIG.

  As shown in FIG. 1, in the image display device disclosed in Patent Document 1, an input image signal 201 is first controlled and stored in a frame image information storage memory 202 by a frame signal 203. Next, the image signal stored in the image information storage memory 202 is read twice at a speed twice the frame period. The first read image signal is input to the synthesis circuit 205 as the first image signal 204 compressed by half, and the next read image signal is saturated by the saturation luminance conversion circuit 206. After the luminance is converted, it is input to the synthesis circuit 205 as the second image signal 207. The output of the synthesis circuit 205 is supplied to the image display 208 as a display signal. Therefore, on the image display 208, an image based on the first image signal 204 and an image based on the second image signal 207 are alternately displayed. The eyeglass shutter timing generation circuit 209 drives the shutter of the eyeglasses 211 based on the frame signal 203 to drive the shutter of the eyeglasses 211 so that the person wearing the eyeglasses 211 cannot see the image by the second image signal 207. 210 is generated. Because of such a configuration, a person who does not wear the glasses 211 appears that the image based on the first image signal 204 and the image converted in saturation and luminance based on the second image signal 207 appear to overlap at the same time. A gray image or a third image (public image) unrelated to the signal 204 is seen. On the other hand, the person wearing the glasses 211 can see a desired image (secret image) based on the first image signal 204.

  As another technique for solving the above-described problem, there is an image display device disclosed in Japanese Patent Application Laid-Open No. 2004-228688 in order to realize “SECURE VIEWING OF DISPLAY UNITS BY IMAGE SUPERPOSITON AND WAVELENGTH SEPARATION”.

  FIG. 2 is a diagram illustrating a configuration of the image display device disclosed in Patent Document 2. As illustrated in FIG.

  As shown in FIG. 2, in the image display device disclosed in Patent Document 2, images of three primary color displays 301 and 302 having different primary color spectra are combined by a beam splitter 303. A user 305 viewing this composite image through a filter 304 that transmits only one of the primary colors of the three primary colors display 301 or 302 can see the image of either of the three primary colors display 301 or 302. However, when the filter 304 is not passed, neither of the images of the three primary color displays 301 and 302 can be seen.

  However, the image display devices disclosed in Patent Documents 1 and 2 have the following problems.

  In the image display device disclosed in Patent Document 1, the first image signal and the second image signal are in a positive and negative relationship, and a bright portion in the first image signal is darkened in the second image signal. A dark part in the first image signal becomes brighter in the second image signal. For this reason, the contrast between the image of the first image signal and the image of the second image signal is increased, and as a result, there is a problem that an image is easily perceived as flicker by a person who looks through the glasses.

Further, in the image display device disclosed in Patent Literature 2, since the images are not switched and displayed at high speed as in Patent Literature 1, the problem of flicker does not occur. However, since the filter for viewing the secret image in Patent Document 2 does not need to be switched ON / OFF in synchronization with the image as in Patent Document 1, only one of the three primary colors of the two primary colors is used. Any material can be used as long as it is transparent. For this reason, there is a problem that the filter can be easily forged by a transmitting material such as cellophane, and the secret image can be easily seen.
JP 63-31788 A US Pat. No. 5,537,476

  Accordingly, an object of the present invention is to provide an image display apparatus and an image display method capable of solving the above-described problem of obtaining high confidentiality without causing flicker.

In order to solve the above problems, an image display device according to the present invention provides:
An image decomposition unit that decomposes an input image into a first multi-primary image composed of first to second N (N is an integer of 1 or more) planes;
An image conversion unit for converting the first multi-primary color image into a second multi-primary color image composed of first to second N planes for canceling the first multi-primary color image;
In the first period, the first to N-th planes of the first multi-primary color image and the N + 1 to N-th planes of the second multi-primary color image are set to the first to first planes of the third multi-primary color image, respectively. In the second period, the first to Nth planes of the second multi-primary color image and the N + 1 to 2N planes of the first multi-primary color image are assigned to the fourth N-th plane, respectively. A multiplexing unit that assigns the first to second N planes of the multi-primary color image and outputs the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner;
The first and second N plane images of the third multi-primary color image and the fourth multi-primary color image output in a time division manner from the multiplexing unit are first spectral luminance characteristics that do not overlap each other. A multi-primary color display device that spatially synthesizes and displays the second N primary colors;
In the first period, only the first to N-th primary colors in the multi-primary color display device are transmitted to block the N + 1 to N-th primary colors, and in the second period, the multi-primary color display device And an optical shutter that transmits only the N + 1 to 2N primary colors and blocks the first to N primary colors.

In order to solve the above problems, an image display method of the present invention includes:
An image display method by an image display device,
An image separation step of separating the input image into a first multi-primary image composed of first to second N (N is an integer of 1 or more) planes;
An image conversion step of converting the first multi-primary image into a second multi-primary image comprising first to second N planes for canceling the first multi-primary image;
In the first period, the first to N-th planes of the first multi-primary color image and the N + 1 to N-th planes of the second multi-primary color image are set to the first to first planes of the third multi-primary color image, respectively. In the second period, the first to Nth planes of the second multi-primary color image and the N + 1 to 2N planes of the first multi-primary color image are assigned to the fourth N-th plane, respectively. A multiplexing step of assigning to the first to second N planes of a multi-primary color image and outputting the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner;
The images of the first to second N planes of the third multi-primary color image and the fourth multi-primary color image output in the time division are respectively first to second N having spectral luminance characteristics that do not overlap each other. A display step of spatially combining the primary colors and displaying them on a multi-primary color display device;
By the optical shutter, in the first period, only the first to N-th primary colors in the multi-primary color display device are transmitted to block the N + 1 to N-th primary colors, and in the second period, And a shutter step that transmits only the N + 1 to Nth primary colors and blocks the first to Nth primary colors in the multi-primary color display device.

  According to the present invention, when the multi-primary color display device is viewed without passing through the optical shutter, the first multi-primary color images displayed in the first to N-th primary colors are N + 1 to 2N in the first period. Are canceled by the second multi-primary image displayed in the primary colors, and in the second period, the second multi-primary images displayed in the first to N-th primary colors are displayed in the N + 1 to Nth primary colors. Is canceled by the first multi-primary color image. Therefore, since the perceived luminance is the same in the first period and the second period, an effect that flicker does not occur can be obtained.

  Further, in synchronization with the first period, only the first to Nth primary colors are transmitted to block the N + 1st to 2Nth primary colors, and the N + 1st to 2Nth primary colors are synchronized with the second period. Since the input image can be viewed only through the optical shutter having a mechanism that transmits only the light and blocks the first to N-th primary colors, the optical shutter is hardly forged, and high confidentiality is obtained.

1 is a diagram illustrating a configuration of an image display device disclosed in Patent Document 1. FIG. It is a figure which shows the structure of the image display apparatus disclosed by patent document 2. FIG. It is a figure which shows the structure of the image display apparatus of the 1st Embodiment of this invention. It is a figure which shows the primary color spectrum of the 6 primary color display apparatus shown in FIG. It is a figure explaining the display order of the image in the image display apparatus of the 1st Embodiment of this invention. It is a figure which shows one structural example of the 6 primary color display apparatus shown in FIG. FIG. 7 is a diagram for explaining a method of generating six primary colors in the six primary color display device shown in FIG. 6. It is a figure which shows the other structural example of the 6 primary color display apparatus shown in FIG. It is a figure which shows the spectral transmittance characteristic of the color filter of 6 primary color display apparatus shown in FIG. It is a figure which shows one structural example of the optical shutter shown in FIG. It is a figure which shows the spectral transmittance characteristic of the color filter of the optical shutter shown in FIG. It is a figure which shows the other structural example of the optical shutter shown in FIG. It is a figure which shows the spectral transmittance characteristic of the color filter of the optical shutter shown in FIG. It is a figure which shows the structure of the image display apparatus of the 2nd Embodiment of this invention. It is a figure explaining the display order of the image in the image display apparatus of the 2nd Embodiment of this invention. It is a figure explaining the display order of the image in the image display apparatus of the 3rd Embodiment of this invention. It is a figure explaining the display order of the image in the image display apparatus of the 4th Embodiment of this invention.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the present invention, an input image is converted into a multi-primary color image composed of first to second N planes (N is an integer equal to or greater than 1), but the following description is simplified. Therefore, description will be made assuming that an input image, which is a color image composed of three primary colors, is converted into a six primary color image composed of first to sixth planes. In all the drawings described below, the same components are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

(First embodiment)
FIG. 3 is a diagram showing the configuration of the image display apparatus according to the first embodiment of the present invention.

  As shown in FIG. 3, the image display apparatus according to the present embodiment includes an image decomposition unit 11, an image conversion unit 12, a multiplexing unit 13, a six primary color display device 14, and an optical shutter 15. Yes.

  The input image T is a color image composed of three planes of R (red), G (green), and B (blue).

  The image decomposition unit 11 converts the input image T into a six primary color input image Q.

6 primary input image Q is the same pattern as the input image T, rather than the three _planes, in Q _{B1, Q B2,} Q _{G1, Q G2,} consists of six planes Q _{R1, Q R2} image is there.

  As a simple method for converting the input image T to the six primary color input image Q, there is a method for obtaining a pixel value for each pixel corresponding to T and Q as follows.

Pixel values of Q _R1 and QR ₂ in the six primary color input image Q = pixel values of the R plane in the input image T Pixel values of Q _G1 and Q _G2 in the six primary color input image Q = pixel values of the G plane in the input image T The pixel values of Q _B1 and Q _B2 in the input image Q = the pixel values of the B plane in the input image T The image conversion unit 12 converts the six primary color input image Q into a six primary color inverted image I for canceling Q.

The constituent planes of the six primary color inverted images I are I _B1 , I _B2 , I _G1 , I _G2 , I _R1 , I _R2 .

  Here, when Q and I are displayed alternately in time, Q and I are temporally synthesized by the integration effect of the human eye, and an image having no correlation with Q is displayed. I is generated as follows.

  More specifically, when the image conversion unit 12 adds the luminance value of each pixel of Q and the luminance value of each pixel of I, all the pixels have a constant luminance (intermediate gray). I may be generated, or I may be generated so that an image is completely unrelated to Q in order not to know the contents of Q. In the following description, it is assumed that the image decomposition unit 12 generates I so as to obtain a gray image.

  The multiplexing unit 13 multiplexes Q and I temporally.

Here, the multiplexing unit 13 selects Q _B1 , Q _G1 , Q _R1 , I _B2 , I _G2 , and I _R2 in the first period from a total of 12 planes constituting Q and I. In the second period, I _B1 , I _G1 , I _R1 , Q _B2 , Q _G2 , and Q _R2 are selected.

  The six primary color images multiplexed by the multiplexing unit 13 are output to the six primary color display device 14 in a time division manner.

  FIG. 4 is a diagram illustrating a primary color spectrum of the six primary color display device 14.

  As shown in FIG. 4, the six primary color display device 14 can display an image with six primary colors (B1, B2, G1, G2, R1, and R2) having spectra that do not overlap each other. Here, a light source having a narrow band spectrum such as a laser light source may be used for the six primary colors, but it is not always necessary to have a relationship that does not completely overlap each other at all wavelengths. That is, when the image is observed through the optical shutter 15, if the crosstalk between the image of the primary color of (R1, G1, B1) and the image of the primary color of (R2, G2, B2) does not increase, In the “bottom” portion (wavelength region in which the spectral luminance value in FIG. 4 is sufficiently smaller than the peak), the primary colors may overlap slightly. However, it should be noted that if the primary colors are too overlapped, the primary colors cannot be separated by the optical shutter 15 and may be observed as crosstalk between the primary colors, resulting in a reduction in image quality.

  FIG. 5 is a diagram for explaining the display order of images in the six primary color display device 14 of the present embodiment.

As shown in FIG. 5, in the first period, the six primary color display device 14 converts Q _B1 , Q _G1 , and _QR1 into the second primary color group C2 by the first primary color group C1 (B1, G1, R1). I _B2 , I _G2 , and I _R2 are displayed by (B2, G2, R2).

Further, in the second period, the six primary color display device 14 uses the first primary color group C1 (B1, G1, R1) to convert I _B1 , I _G1 , I _R1 into the second primary color group C2 (B2, G2, R _B ) displays Q _B2 , Q _G2 , and Q _R2 .

  Then, after the third period, the six primary color display device 14 repeats the image display in the first period and the second period.

  The optical shutter 15 passes only light of the first primary color group C1 (B1, G1, R1) in the first period in synchronization with the display of the image on the six primary color display device 14, and in the second period, Control is performed so that only the light of the second primary color group C2 (B2, G2, R2) passes.

With this control, the six-primary-color display device 14 through the light shutter 15, in the first period, appeared additive color mixing images _{Q B1, Q G1, Q R1} displayed by the first primary color group C1 is, I _B2 , I _G2 and I _R2 are blocked.

In the second period, _{Q B2,} Q G2 displayed by the second primary color group _C2, additive color mixing images _{Q R2} is _{visible, I B1, I G1, I} R1 is interrupted.

Then, when the first period and the second period are repeated at high speed, (Q _B1 , Q _G1 , _{QR 1} ) and (Q _B2 , Q _G2 , QR ₂ ) are timed due to the integration effect of the human eye. The six primary color input images Q, that is, the input image T can be viewed.

On the other hand, the six-primary-color display device 14 without passing through the optical shutter 15, the _{Q B1, Q G1, Q R1} that appears in the first period _{I B1, I} G1 displayed in the second period, I canceled by _{R1, Q} B2 to be displayed in the second _period, Q _{G2, Q R2} is canceled by _{I B2, I G2, I R2} displayed on the first time period, whereby the entire surface gray image perception Is done. Therefore, the six primary color input image Q, that is, the input image T cannot be seen.

  As for the speed of displaying an image, since an image of one frame is formed by an image of the first period and an image of the second period, 1 frame = 1/60 seconds or less, that is, the first period and the second period In this period, it is preferable to display an image at a display frequency of 120 Hz or more. Below this display frequency, generally, the image of the first period and the image of the second period are not temporally integrated by the human eye, and two independent images are displayed alternately. Will be perceived.

  Here, in the present embodiment, a description will be given of the fact that the luminance difference between the image in the first period and the image in the second period is small and flicker does not occur.

In the first period, _{Q B1,} Q _{G1, Q R1} among the six primary colors input image Q is also, _{I B2,} I G2 of the six primary colors reversed image _I, are displayed _{I R2. Here, Q B1, Q G1, Q} R1 is, B, each having the input image T, G, can be interpreted as having half of the luminance component of the R component. _{Thus, Q B2, Q G2, Q} R2 with the other half of the luminance component of the input image T _is not exactly the same as _{Q B1, Q G1, Q R1} , and those having the value having a high correlation Conceivable. _{Then, I B2, I G2, I} R2 _is, Q _B2, Q _G2, not only can be canceled _{Q R2,} if not completely _{Q B1, Q G1, Q R1} also can be canceled, the entire screen It can be seen that it has the function of making a gray image of intermediate gradation.

Similarly, in the second period, it is understood that I _B1 , I _G1 , and I _R1 cancel the Q _B2 , Q _G2 , and QR ₂ to make the entire screen a gray image with a middle gradation. .

  As described above, since the gray image of the intermediate gradation having almost the same luminance is displayed in both the first period and the second period, the person who views the six primary color display device 14 without passing through the optical shutter 15 does not flicker. There is no perception.

  The forgery prevention effect of the optical shutter 15 in this embodiment will be described.

  In the image display device disclosed in Patent Document 2 shown in FIG. 2, a secret image can be easily seen by looking at the screen through a filter 304 that transmits only one of the primary colors of the three primary colors display 301 or 302. There was a problem that it would end up.

However, in the present embodiment, even when looking at the first 6-primary-color display device 14 through a filter passing only light of the primary color group _{C1, Q B1, Q G1,} Q R1 displayed on the first period, the second The input image T cannot be seen because it is temporally canceled by I _B1 , I _G1 , and I _R1 displayed during the period.

Similarly, looking at the 6-primary-color display device 14 through a filter passing only light of the second primary color group C2, _{Q B2,} Q G2 displayed in the second _{period, Q R2} is displayed on the first time period The input image T cannot be seen because it is canceled in time by I _B2 , I _G2 , and I _R2 .

  Accordingly, in synchronism with the display of the image on the six primary color display device 14, light that passes only the light of the first primary color group C in the first period and passes only the light of the second primary color group C2 in the second period. The input image T cannot be viewed unless the shutter 15 is used. Therefore, an image display device having high confidentiality can be provided.

  Hereinafter, the configuration of the present embodiment will be described in more detail.

  First, a specific configuration of the six primary color display device 14 will be described.

  FIG. 6 is a diagram illustrating a configuration example of the six primary color display device 14. FIG. 7 is a diagram for explaining a method of generating six primary colors in the six primary color display device 14 shown in FIG.

  As a configuration method of the six primary color display device 14, for example, as shown in FIG. 6, a method using two three primary color projectors 141A and 141B having the same primary color spectrum is conceivable. It is assumed that the primary color spectra of the three primary color projectors 141A and 141B have the characteristics shown in the upper part of FIG. Under this assumption, the image output unit of the three primary color projector 141A has a spectral transmittance characteristic that transmits only the long wavelength side of the spectrum of each primary color in the three primary color projector 141A, as shown in the middle left of FIG. A filter 142A is provided. Further, as shown in the middle right of FIG. 7, the image output unit of the three primary color projector 141B is provided with a filter 142B having a spectral transmittance characteristic that transmits only the short wavelength side of the spectrum of each primary color in the three primary color projector 141B. . This makes it possible to create six primary colors whose spectral spectra do not overlap each other as shown in the lower part of FIG. Then, as shown in FIG. 6, by combining the images output from the three primary color projectors 141A and 141B on the screen 143, display with the six primary colors becomes possible. The three primary color projectors 141A and 141B may be liquid crystal projectors or DLP projectors.

  Also, two sets of LED light sources or laser light sources having different spectra may be used as the light sources of the two three primary color projectors 141A and 141B. More specifically, one of the three primary color projectors 141A and 141B uses a three-color light source having a spectrum such as B1, G1, and R1 in FIG. 4, and the other is used as B2, G2, and R2 in FIG. A light source of three colors having a spectrum is used. In this configuration, it is not necessary to provide the filters 142A and 142B as shown in FIG. 6, so that there is an advantage that the light use efficiency of the light source can be increased as compared with the configuration of FIG.

  FIG. 8 is a diagram illustrating another configuration example of the six primary color display device 14. FIG. 9 is a diagram for explaining the spectral transmittance characteristics of the color filters of the six primary color display device 14 shown in FIG.

  As another configuration method of the six primary color display device 14, as shown in FIG. 8, in a liquid crystal display (liquid crystal display device) or a plasma display, six colors having spectral transmittance characteristics that do not overlap each other as shown in FIG. One pixel may be formed by six subpixels using a filter. This also makes it possible to realize six primary color displays. Furthermore, even in an organic EL display using six-color organic EL elements having spectral characteristics (spectral radiance characteristics) that do not overlap with each other, it is possible to realize six primary color displays.

  Any of the six primary color display devices 14 shown in FIGS. 6 and 8 can implement the present embodiment, but importantly, the six primary color spectra do not overlap each other. This is because if the primary color spectra overlap, when the screen is viewed through the optical shutter 15, an image of the primary color that should be blocked is seen, crosstalk occurs, and the image viewed through the optical shutter 15. This is because the image quality of the image is degraded. However, as described in the general description of the six-primary-color display device, the primary colors may be slightly overlapped as long as the crosstalk does not increase.

  Next, a specific configuration of the optical shutter 15 will be described.

  FIG. 10 is a diagram illustrating a configuration example of the optical shutter 15. FIG. 11 is a diagram for explaining the spectral transmittance characteristics of the color filters F1 and F2 of the optical shutter 15 shown in FIG.

  The optical shutter 15 passes only the light of the first primary color group C1 (B1, G1, R1) in the first period, and only the light of the second primary color group C2 (B2, G2, R2) in the second period. Anything can be used.

  Accordingly, for example, as shown in FIG. 10, the optical shutter 15 is a color filter that transmits the first primary color group C1 (B1, G1, R1) of the six primary color display device 14 on a simple matrix or active matrix liquid crystal panel. It can be realized by a liquid crystal panel in which F1 and a color filter F2 that transmits the second primary color group C2 (B2, G2, R2) are arranged in a checkered pattern. To pass only the light of the first primary color group, the pixel group in which F1 is arranged is turned on (liquid crystal is in a transmission state), and the pixel group in which F2 is arranged is turned off (the liquid crystal is in a cutoff state). When it is desired to transmit only light of the primary color group, the pixel group in which F2 is arranged may be turned on (liquid crystal is in a transmission state) and the pixel group in which F1 is arranged is turned off (liquid crystal is in a cutoff state).

FIG. 12 is a diagram illustrating another configuration example of the optical shutter 15. FIG. 13 is a diagram for explaining the spectral transmittance characteristics of the color filters F _B1 , F _G1 , F _R1 , F _B2 , F _G2 , and F _R2 of the optical shutter 15 shown in FIG. 12.

As another example of the optical shutter 15, as shown in FIG. 12, six color filters F _B1 , F that transmit the six primary colors B1, G1, R1, B2, G2, R2 of the six primary color display, respectively. A liquid crystal panel in which _{G 1} , F _{R 1} , F _B2 , F _G2 , and F _R2 are arranged in a checkered pattern may be used. In the case of this configuration, when only the light of the first primary color group C1 is desired to pass, the pixel group in which F _B1 , F _G1 , and F _R1 are arranged is ON (the liquid crystal is in a transmissive state) and F _B2 , F _G2 , When the pixel group in which _FR2 is arranged is turned off (the liquid crystal is cut off) and only the light of the second primary color group C2 is allowed to pass, the pixel group in which _FB2 , _FG2 , _FR2 is arranged is turned on ( The liquid crystal is in a transmissive state) and the pixel group in which F _B1 , F _G1 , and F _R1 are disposed may be turned off (the liquid crystal is cut off).

  As a method of synchronizing the operation timings of the six primary color display device 14 and the optical shutter 15, a synchronization signal is transmitted from the multiplexing unit 13 to the optical shutter 15 in synchronization with the timing of transmitting an image from the multiplexing unit 13 to the six primary color display device 14. Or a method of transmitting a synchronization signal from the six primary color display device 14 to the optical shutter 15 in synchronization with the display timing on the six primary color display device 14. The transmission form of the synchronization signal may be wired or wireless. Further, the synchronization signal may be encrypted. If the synchronization signal is encrypted, even if the optical shutter 15 can be forged, the input image T cannot be seen unless the synchronization signal is decrypted, so that the secrecy can be further improved.

(Second Embodiment)
FIG. 14 is a diagram showing a configuration of an image display apparatus according to the second embodiment of the present invention.

  As shown in FIG. 14, the image display apparatus of the present embodiment is different from the configuration of the first embodiment of FIG. 3 in that a public image P is input in addition to the input image T, and the second The difference is that an image decomposing unit 16 is added.

  Similar to the input image T, the public image P is a color image composed of three planes of R (red), G (green), and B (blue).

  The image decomposition unit 16 converts the public image P into a six primary color public image U.

The constituent planes of the six primary color public images U are U _B1 , U _G1 , U _R1 , U _B2 , U _G2 and U _R2 .

  The multiplexing unit 13 multiplexes Q, I, and U in time.

Here, the multiplexing unit 13 includes Q _B1 , Q _G1 , Q _R1 , I _B2 , I _G2 , I _{R2 in} the first period among a total of 18 planes constituting Q, I, and U. In the second period, I _B1 , I _G1 , I _R1 , Q _B2 , Q _G2 , and QR ₂ are selected, and in the third period, U _B1 , U _G1 , U _R1 , U _B2 , _UG2 and _UR2 are selected.

  The six primary color images multiplexed by the multiplexing unit 13 are output to the six primary color display device 14 in a time-sharing manner as in the configuration of FIG.

  FIG. 15 is a diagram for explaining the display order of images in the six primary color display device 14 of the present embodiment.

As shown in FIG. 15, in the first period, the six primary color display device 14 converts Q _B1 , Q _G1 , and _QR1 into the second primary color group C2 by the first primary color group C1 (B1, G1, R1). I _B2 , I _G2 , and I _R2 are displayed by (B2, G2, R2).

Further, in the second period, the six primary color display device 14 uses the first primary color group C1 (B1, G1, R1) to convert I _B1 , I _G1 , I _R1 into the second primary color group C2 (B2, G2, R _B ) displays Q _B2 , Q _G2 , and Q _R2 .

Further, in the third period, the six primary color display device 14 uses the first primary color group C1 (B1, G1, R1) to convert U _B1 , U _G1 , U _R1 into the second primary color group C2 (B2, G2, Show _{U B2, U G2, U R2} by R2).

  Then, the six primary color display device 14 repeats the image display from the first period to the third period after the fourth period.

  The optical shutter 15 passes only light of the first primary color group C1 (B1, G1, R1) in the first period in synchronization with the display of the image on the six primary color display device 14, and in the second period, Only the light of the second primary color group C2 (B2, G2, R2) is allowed to pass, and in the third period, the light of the first primary color group C1 (B1, G1, R1) and the second primary color group C2 (B2, G2 and R2) are controlled to block both lights.

With this control, the six-primary-color display device 14 through the light shutter 15, in the first period, appeared additive color mixing images _{Q B1, Q G1, Q R1} displayed by the first primary color group C1 is, I _B2 , I _G2 and I _R2 are blocked.

In the second period, _{Q B2,} Q G2 displayed by the second primary color group _C2, additive color mixing images _{Q R2} is _{visible, I B1, I G1, I} R1 is interrupted.

  In the third period, since both C1 and C2 are blocked, no image can be seen.

Then, when the first period, the second period, and the third period are repeated at high speed, (Q _B1 , Q _G1 , Q _R1 ) and (Q _B2 , Q _G2 , Q _R2 ) is temporally synthesized, and the six primary color input image Q, that is, the input image T can be seen.

On the other hand, the six-primary-color display device 14 without passing through the optical shutter 15, the _{Q B1, Q G1, Q R1} that appears in the first period _{I B1, I} G1 displayed in the second period, I canceled by _{R1, Q B2,} Q G2 displayed in the second _{period, Q R2} is _{I B2,} I G2 displayed on the first _period, is counteracted by the _{I R2,} it is displayed in the third period Only U _B1 , U _G1 , U _R1 , U _B2 , U _G2 , _UR2 are visible. Therefore, the six primary color input image Q, that is, the input image T cannot be seen. Thus, by adding the public image P, completely different images can be seen depending on whether the optical shutter 15 is passed or not.

  The image display speed is such that one frame is 1/60 seconds or less because an image of the first period, an image of the second period, and an image of the third period form an image of one frame. It is preferable to display an image at a display frequency of 180 Hz or more in each of the first period to the third period. Below this display frequency, the image of the first period, the image of the second period, and the image of the third period are generally not integrated temporally with human eyes, and three independent images Are perceived as being displayed alternately.

(Third embodiment)
The image display apparatus according to the third embodiment of the present invention has the same configuration as that of FIG. 3 or FIG. 14, but the display order of images on the six primary color display apparatus 14 is different from that of FIGS. 5 and 15.

In the method of FIG. 5, in the first period, the _{Q B1, Q G1, Q R1} by C1, displays the _{I B2, I G2, I R2} by C2, the second period, the C2 _Q B2, Q _G2, and _{Q R2,} displays the _{I B1, I G1, I R1} through C1, the third and subsequent periods, were repeated image display of the first and second periods.

  However, the order of the images displayed after the third period need not be limited to the order of the images displayed in the first period and the second period, and can be changed.

  Further, in the method of FIG. 15, after the fourth period, the image display of the first period to the third period is repeated, but the images displayed after the fourth period are the first period to the third period. The image is not limited to the image displayed in the period 3, and can be changed.

  The image display apparatus according to the present embodiment changes the image display for each period.

  In the following, it is assumed that the image display device of the present embodiment has the same configuration as that in FIG. 3, and as shown in FIG. 16, the display images in the third period and the fourth period are the first period, Description will be made assuming that the display image is different from the display image in the second period.

  FIG. 16 is a diagram for explaining the display order of images in the six primary color display device 14 of the present embodiment.

As shown in FIG. 16, 6-primary-color display device 14, in the third period, the _{Q B1, Q R1, Q G2} by B1, R1, G2, by _{B2, R2, G1 I B2,} I R2, I G1 In the fourth period, I _B1 , I _R1 and I _G2 are displayed by B1, R1 and G2, and Q _B2 , _QR2 and _QG1 are displayed by B2, R2 and G1.

  The optical shutter 15 passes only light of B1, R1, and G2 in the third period, and only light of B2, R2, and G1 in the fourth period in synchronization with the display of the image on the six primary color display device 14. Controlled to pass through. In this way, the optical shutter 15 is controlled so as to pass a set of primary colors different from those in the first period and the second period, so that the six primary colors are transmitted as in the configuration shown in FIG. It is preferable to use one that can be controlled independently.

With this control, when the six primary color display device 14 is viewed through the optical shutter 15, an additive color mixture image of Q _B1 , Q _R1 , and Q _G2 is seen in the third period, and I _B2 , I _R2 , and I _G1 are blocked. The

In the fourth period, an additive color mixture image of Q _B2 , Q _R2 , and Q _G1 is seen, and I _B1 , I _R1 , and I _G2 are blocked.

Therefore, (Q _B1 , _{QR 1} , Q _G2 ) and (Q _B2 , Q _R2 , Q _G1 ) are temporally synthesized by the integration effect of the human eye, and the six primary color input images Q, that is, the input image T, are synthesized. Can see.

As described above, since it is sufficient that the image of each plane is canceled in two adjacent periods, as shown in FIG. 5, Q _B1 , Q _G1 , Q _R1 , I _B2 , I are always in the first period. _G2, is displayed set of images of _{I R2,} always _{I B1, I G1, I R1} , Q B2, Q G2, it is not necessary to set the image _{Q R2} is displayed in the second period.

  In the method of FIG. 16, the primary color transmitted through the optical shutter 15 is different every time. Therefore, when the display image and the synchronization signal of the optical shutter 15 are encrypted, the encryption is stronger than the method of FIG. can do.

  For example, in the method of FIG. 5, once the image display timing is known, if the optical shutter 15 is controlled to transmit the primary colors B1, G1, R1 or B2, G2, R2 accordingly, the input image is displayed. T (six primary color input image Q) can be seen.

  On the other hand, in the method of FIG. 16, even if the display timing of the image is known, it is not possible to see which primary color should be transmitted at the display timing, so the input image T cannot be seen.

  Here, it is assumed that the image display apparatus of the present embodiment has the same configuration as that in FIG. 3, and an example in which display images in the third period and the fourth period in FIG. 5 are changed is shown. Of course, in the configuration in which the public image P is added as shown in FIG. 14, the display images in the fourth period and the fifth period in FIG. 15 can be changed similarly.

(Fourth embodiment)
The image display apparatus according to the fourth embodiment of the present invention has the same configuration as that of FIG. 3 or FIG. 14, but the display order of images on the six primary color display apparatus 14 is different from that of FIGS. 5, 15 and 16.

  5, 15, and 16, the first and second periods are such that a gray image is perceived when the six primary color display device 14 is viewed without passing through the optical shutter 15. A primary color image was displayed.

  However, the image perceived when the six primary color display device 14 is viewed without passing through the optical shutter 15 during the first and second periods does not have to be limited to a full gray image. An image (for example, public image P) may be perceived.

  In the first or second period, the image display device of the present embodiment uses the primary colors blocked by the optical shutter 15 when the six primary color display device 14 is viewed without passing through the optical shutter 15. An image other than the input image T (public image P) is displayed.

  Hereinafter, it is assumed that the image display apparatus according to the present embodiment has the same configuration as that in FIG. 14, and as shown in FIG. 17, the primary colors blocked by the optical shutter 15 in the first and second periods are as follows. The description will be made assuming that the public image P is added and displayed.

  FIG. 17 is a diagram for explaining the display order of images in the six primary color display device 14 of the present embodiment.

As shown in FIG. 17, in the first period, the colors of the second primary color group C2 (B2, G2, R2) are not transmitted to the optical shutter 15. Therefore, the six primary color display device 14 adds (U _B2 , U _G2 , U _R2 ) of the six primary color public images U to (I _B2 , I _G2 , I _R2 ) and displays it in the first period. To do. Then, in the first _{period, (Q B1, Q G1,} Q R1) is _{(I B2, I G2, I} R2) with canceled by the primary color group C2 (B2 of the six primary colors public image U, G2, R2 ) Is displayed.

Further, in the second period, the colors of the first primary color group C1 (B1, G1, R1) are not transmitted to the optical shutter 15. Therefore, the six primary color display device 14 adds (U _B1 , U _G1 , U _R1 ) of the six primary color public images U to (I _B1 , I _G1 , I _R1 ) and displays it in the second period. To do. Then, in the second _{period, (Q B1, Q G1,} Q R1) is _{(I B1, I G1, I} R1) with canceled by, among six primary colors public image U primaries group C1 (B1, G1, R1 ) Is displayed.

When the six primary color display device 14 is viewed through the optical shutter 15, the first primary color group C1 is displayed (Q _B1 , Q _G1 , _QR1 ) in the first period, and the second primary color group C2 is displayed. The added images of (I _B2 , I _G2 , I _R2 ) and (U _B2 , U _G2 , U _R2 ) are blocked.

In the second period, (Q _B2 , Q _G2 , QR ₂ ) displayed by the second primary color group C2 can be seen, and (I _B1 , I _G1 , I _R1 ) are displayed by the first primary color group C1. ) And (U _B1 , U _G1 , U _R1 ) are blocked.

Then, (Q _B1 , Q _G1 , Q _R1 ) and (Q _B2 , Q _G2 , Q _R2 ) are temporally synthesized by the integration effect of the human eye, and the six primary color input images Q can be viewed.

On the other hand, the six-primary-color display device 14 without passing through the optical shutter 15, the _{Q B1, Q G1, Q R1} displayed in the first period _{I B1, I} G1 displayed in the second period, I canceled by _{R1, Q B2,} Q G2 displayed in the second _{period, Q R2} is canceled by _{I B2, I G2, I R2} displayed on the first time period are displayed in the first period (U _B2 , U _G2 , U _R2 ) and (U _B1 , U _G1 , U _R1 ) displayed in the second period are combined to perceive a 6-primary-color public image U.

  The present embodiment can be similarly applied to any of the methods in FIGS. 5, 15, and 16.

  For example, in the method of FIG. 15, consider an example in which the present embodiment is applied and the public image P is displayed in the first and second periods.

In this case, when the six primary color display device 14 is viewed through the optical shutter 15, (Q _B1 , Q _G1 , _{QR 1} ) displayed by the first primary color group C1 can be seen in the first period, and the second primary color group is displayed. The added images of (I _B2 , I _G2 , I _R2 ) and (U _B2 , U _G2 , U _R2 ) displayed by C2 are blocked.

In the second period, (Q _B2 , Q _G2 , QR ₂ ) displayed by the second primary color group C2 can be seen, and (I _B1 , I _G1 , I _R1 ) are displayed by the first primary color group C1. ) And (U _B1 , U _G1 , U _R1 ) are blocked.

  In addition, in the third period, any image of Q, I, and P cannot be viewed.

Then, (Q _B1 , Q _G1 , Q _R1 ) and (Q _B2 , Q _G2 , Q _R2 ) are temporally synthesized by the integration effect of the human eye, and the six primary color input images Q can be viewed.

On the other hand, the six-primary-color display device 14 without passing through the optical shutter 15, the _{Q B1, Q G1, Q R1} that appears in the first period _{I B1, I} G1 displayed in the second period, I canceled by _{R1, Q B2,} Q G2 displayed in the second _{period, Q R2} is canceled by _{I B2, I G2, I R2} displayed on the first time period are displayed in the first period (U _B2 , U _G2 , U _R2 ) and public images U _B1 , U _G1 , U _R1 displayed in the third period when displayed in the second period (U _B1 , U _G1 , U _R1 ) , U _B2 , U _G2 , and _UR2 are combined to perceive a 6-primary-color public image U.

  When the present embodiment is not applied to the method of FIG. 15, when the six primary color display device 14 is viewed without passing through the optical shutter 15, the ratio of displaying a full gray image in the first to third periods is large. Therefore, the image of the six primary color public image U that is almost gray is perceived.

  On the other hand, when the present embodiment is applied to the method of FIG. 15, when the six primary color display device 14 is viewed without passing through the optical shutter 15, the public image U is displayed in the first to third periods. Since the proportion of the image is increased, the six primary color public image U is perceived. Therefore, the contrast of the image (six primary color public image U) perceived when viewed without passing through the optical shutter 15 can be improved as compared with the case where the present embodiment is not applied to the method of FIG. There is.

  In the method of FIG. 16, when this embodiment is applied, a public image may be displayed using primary colors blocked by the optical shutter 15 in each period. The control method of the optical shutter 15 is the same as in FIG. 16, and the perceived image is the same as in FIG.

In the present embodiment, the six-color public image U is added to (I _B2 , I _G2 , I _R2 ) or (I _B1 , I _G1 , I _R1 ) and displayed in the first or second period. It is necessary to lower the brightness of I in advance. In addition, the luminance of Q needs to be lowered so that it is canceled when I and Q are displayed in time. This processing can be performed when the image decomposition unit 11 converts the input image T into the six primary color images Q.

  As mentioned above, although this invention was demonstrated according to said embodiment, this invention is not limited only to said embodiment, In the scope of invention of each claim of the claim of this application It goes without saying that various modifications and corrections that can be made by those skilled in the art are included.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2007-218204 for which it applied on August 24, 2007, and takes in those the indications of all here.

Claims (17)

An image decomposition unit that decomposes an input image into a first multi-primary image composed of first to second N (N is an integer of 1 or more) planes;
When the first multi-primary color image is a second multi-primary color image, and the first multi-primary color image and the second multi-primary color image are alternately displayed in time, the human eye The first multi-primary color image and the second multi-primary color image are temporally synthesized by an integration effect, and an image having no correlation with the first multi-primary color image is displayed . An image conversion unit for converting to a second multi-primary color image consisting of
In the first period, the first to N-th planes of the first multi-primary color image and the N + 1 to N-th planes of the second multi-primary color image are set to the first to first planes of the third multi-primary color image, respectively. In the second period, the first to Nth planes of the second multi-primary color image and the N + 1 to 2N planes of the first multi-primary color image are assigned to the fourth N-th plane, respectively. A multiplexing unit that assigns the first to second N planes of the multi-primary color image and outputs the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner;
The first and second N plane images of the third multi-primary color image and the fourth multi-primary color image output in a time division manner from the multiplexing unit are first spectral luminance characteristics that do not overlap each other. A multi-primary color display device that spatially synthesizes and displays the second N primary colors;
In the first period, only the first to N-th primary colors in the multi-primary color display device are transmitted to block the N + 1 to N-th primary colors, and in the second period, the multi-primary color display device An optical shutter that transmits only the N + 1 to 2N primary colors and blocks the first to N primary colors. The image display device according to claim 1,
N = 3,
The image decomposition unit decomposes an input image into first six primary color images including first to sixth planes,
When the image conversion unit displays the first six primary color images as second six primary color images and alternately displays the first six primary color images and the second six primary color images in terms of time. In addition, the first six primary color image and the second six primary color image are temporally synthesized by the integration effect of the human eye, and an image having no correlation with the first six primary color image is displayed. , Converted into a second six-primary-color image composed of first to sixth planes,
In the first period, the multiplexing unit converts the first to third planes of the first six primary color images and the fourth to sixth planes of the second six primary color images respectively to the third plane. Assigned to the first to sixth planes of the six primary color images, and the first to third planes of the second six primary color images and the fourth to sixth of the first six primary color images in the second period. Are assigned to the first to sixth planes of the fourth six-primary-color image, respectively, and the third six-primary-color image and the fourth six-primary-color image are output in a time-sharing manner,
The multi-primary color display device does not overlap the third six primary color images and the images of the first to sixth planes of the fourth six primary color images output from the multiplexing unit in a time division manner. A six-primary-color display device that spatially combines and displays the first to sixth primary colors having spectral luminance characteristics;
In the first period, the optical shutter transmits only the first to third primary colors in the six primary color display device and blocks the fourth to sixth primary colors, and in the second period, An image display device that transmits only the fourth to sixth primary colors in the six primary color display device and blocks the first to third primary colors. The image display device according to claim 1,
A second image decomposition unit that separates the second input image into a fifth multi-primary image composed of the first to second N planes;
In the first period, the multiplexing unit converts the first to Nth planes of the first multi-primary color image and the N + 1 to Nth planes of the second multi-primary color image, respectively, Assigned to the first to second N planes of the multi-primary color image, and the first to N-th planes of the second multi-primary color image and the N + 1 to second N of the first multi-primary color image in the second period. Are assigned to the first to second N planes of the fourth multi-primary color image, respectively, and in the third period, the first to second N planes of the fifth multi-primary color image are assigned to the sixth multi-primary image, respectively. Assign to the first to second N planes of the primary color image, and output the third multi-primary image, the fourth multi-primary color image, and the sixth multi-primary color image in a time-sharing manner,
The multi-primary color display device includes first to second N planes of the third multi-primary color image, the fourth multi-primary color image, and the sixth multi-primary color image output in a time division manner from the multiplexing unit. Images are spatially combined and displayed with the first to second N primary colors having spectral luminance characteristics that do not overlap each other,
In the first period, the optical shutter transmits only the first to N-th primary colors in the multi-primary color display device and blocks the N + 1 to N-th primary colors, and in the second period, Only the N + 1 to 2N primary colors in the multi-primary color display device are transmitted to block the first to N-th primary colors, and the first to second N in the multi-primary color display device in the third period. An image display device that blocks any of the primary colors. The image display device according to claim 3,
N = 3,
The image decomposition unit decomposes an input image into first six primary color images including first to sixth planes,
When the image conversion unit displays the first six primary color images as second six primary color images and alternately displays the first six primary color images and the second six primary color images in terms of time. In addition, the first six primary color image and the second six primary color image are temporally synthesized by the integration effect of the human eye, and an image having no correlation with the first six primary color image is displayed. , Converted into a second six-primary-color image composed of first to sixth planes,
The second image decomposition unit decomposes the second input image into a fifth six-primary-color image composed of first to sixth planes,
In the first period, the multiplexing unit converts the first to third planes of the first six primary color images and the fourth to sixth planes of the second six primary color images respectively to the third plane. Assigned to the first to sixth planes of the six primary color images, and the first to third planes of the second six primary color images and the fourth to sixth of the first six primary color images in the second period. Are assigned to the first to sixth planes of the fourth six-primary-color image, respectively, and in the third period, the first to sixth planes of the fifth six-primary-color image are assigned to the sixth plane, respectively. Assigning to the first to sixth planes of the six primary color images, outputting the third six primary color images, the fourth six primary color images, and the sixth six primary color images in a time-sharing manner,
The multi-primary color display device includes first to sixth planes of the third six-primary-color image, the fourth six-primary-color image, and the sixth six-primary-color image that are output in a time division manner from the multiplexing unit. A six primary color display device that displays images by spatially combining and displaying first to sixth primary colors having spectral luminance characteristics that do not overlap each other,
In the first period, the optical shutter transmits only the first to third primary colors in the six primary color display device and blocks the fourth to sixth primary colors, and in the second period, Only the fourth to sixth primary colors in the six primary color display device are transmitted to block the first to third primary colors, and in the third period, the first to sixth colors in the six primary color display device. An image display device that blocks any of the primary colors. The image display device according to claim 2 or 4,
The six primary color display device
A first three primary color projector;
A second three primary color projector;
A first filter having a spectral transmittance characteristic that is provided in an image output unit of the first three primary color projector and transmits only a long wavelength side of a spectrum of each primary color in the first three primary color projector;
A second filter having a spectral transmittance characteristic that is provided in an image output unit of the second three-primary-color projector and transmits only the short wavelength side of the spectrum of each primary color in the second three-primary-color projector. ,
An image display device that spatially synthesizes and displays an image output from the first three primary color projector and an image output from the second three primary color projector. The image display device according to claim 2 or 4,
The six primary color display device is an image display device which is a liquid crystal display device having six color filters having spectral transmittance characteristics that do not overlap each other. The image display device according to claim 2 or 4,
The six primary color display device is a plasma display provided with six color filters having spectral transmittance characteristics that do not overlap each other. The image display device according to claim 2 or 4,
The six primary color display device is an organic EL display composed of organic EL elements of six colors having spectral radiance characteristics that do not overlap each other. The image display device according to claim 2 or 4,
The optical shutter is
A first color filter that transmits the first to third primary colors in the six primary color display device, and a second color filter that transmits the fourth to sixth primary colors in the six primary color display device. Simple matrix or active matrix liquid crystal panel
In the first period, the liquid crystal of the pixel in which the first color filter is disposed is in a state of transmitting light, and the liquid crystal of the pixel in which the second color filter is disposed is in a state of blocking light.
In the second period, the liquid crystal of the pixel in which the second color filter is disposed is in a state of transmitting light, and the liquid crystal of the pixel in which the first color filter is disposed is in a state of blocking light. Image display device. The image display device according to claim 2,
A second image decomposition unit that decomposes the second input image into a fifth six-primary-color image including the first to sixth planes;
The multiplexing unit includes:
In the first period, the first to third planes of the first six primary color images, the fourth plane of the second six primary color images, and the fourth plane of the fifth six primary color image Addition image, addition image of the fifth plane of the second six primary color image and the fifth plane of the fifth six primary color image, sixth plane of the second six primary color image and the fifth plane The addition images of the six primary color images and the sixth plane are assigned to the first to sixth planes of the third six primary color images, respectively.
In the second period, an added image of a first plane of the first six primary color image and a first plane of the fifth six primary color image, a second plane of the first six primary color image, An addition image of the fifth six-primary-color image with the second plane, an addition image of the third plane of the first six-primary-color image and the third plane of the fifth six-primary-color image, the second The fourth to sixth planes of the six primary color images are assigned to the first to sixth planes of the fourth six primary color image, respectively.
An image display device that outputs the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner. The image display device according to claim 4,
The multiplexing unit includes:
In the first period, the first to third planes of the first six primary color images, the fourth plane of the second six primary color images, and the fourth plane of the fifth six primary color image Addition image, addition image of the fifth plane of the second six primary color image and the fifth plane of the fifth six primary color image, sixth plane of the second six primary color image and the fifth plane The addition images of the six primary color images and the sixth plane are assigned to the first to sixth planes of the third six primary color images, respectively.
In the second period, an added image of a first plane of the first six primary color image and a first plane of the fifth six primary color image, a second plane of the first six primary color image, An addition image of the fifth six-primary-color image with the second plane, an addition image of the third plane of the first six-primary-color image and the third plane of the fifth six-primary-color image, the second The fourth to sixth planes of the six primary color images are assigned to the first to sixth planes of the fourth six primary color image, respectively.
In the third period, the first to sixth planes of the fifth six primary color image are assigned to the first to sixth planes of the sixth six primary color image, respectively.
An image display device that outputs the third six primary color image, the fourth six primary color image, and the sixth six primary color image in a time division manner. An image display method by an image display device,
An image separation step of separating the input image into a first multi-primary image composed of first to second N (N is an integer of 1 or more) planes;
When the first multi-primary color image is a second multi-primary color image, and the first multi-primary color image and the second multi-primary color image are alternately displayed in time, the human eye The first multi-primary color image and the second multi-primary color image are temporally synthesized by an integration effect, and an image having no correlation with the first multi-primary color image is displayed . An image conversion step for converting to a second multi-primary color image consisting of
In the first period, the first to N-th planes of the first multi-primary color image and the N + 1 to N-th planes of the second multi-primary color image are set to the first to first planes of the third multi-primary color image, respectively. In the second period, the first to Nth planes of the second multi-primary color image and the N + 1 to 2N planes of the first multi-primary color image are assigned to the fourth N-th plane, respectively. A multiplexing step of assigning to the first to second N planes of a multi-primary color image and outputting the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner;
The images of the first to second N planes of the third multi-primary color image and the fourth multi-primary color image output in the time division are respectively first to second N having spectral luminance characteristics that do not overlap each other. A display step of spatially combining the primary colors and displaying them on a multi-primary color display device;
By the optical shutter, in the first period, only the first to N-th primary colors in the multi-primary color display device are transmitted to block the N + 1 to N-th primary colors, and in the second period, And a shutter step for transmitting only the N + 1 to 2N primary colors and blocking the first to N primary colors in the multi-primary color display device. The image display method according to claim 12 ,
N = 3,
In the image decomposition step, the input image is decomposed into first six primary color images composed of first to sixth planes;
In the image conversion step, the first six primary color images are second six primary color images, and the first six primary color images and the second six primary color images are alternately displayed in time. In addition, the first six primary color image and the second six primary color image are temporally synthesized by the integration effect of the human eye, and an image having no correlation with the first six primary color image is displayed. , Converted into a second six-primary-color image composed of first to sixth planes,
In the multiplexing step, in the first period, the first to third planes of the first six primary color image and the fourth to sixth planes of the second six primary color image are respectively set to the third plane. Assigned to the first to sixth planes of the six primary color images, and the first to third planes of the second six primary color images and the fourth to sixth of the first six primary color images in the second period. Are assigned to the first to sixth planes of the fourth six-primary-color image, respectively, and the third six-primary-color image and the fourth six-primary-color image are output in a time-sharing manner,
In the display step, the images of the first to sixth planes of the third six-primary-color image and the fourth six-primary-color image output in the time division manner have spectral luminance characteristics that do not overlap each other. Spatially synthesized by the first to sixth primary colors and displayed on the multi-primary color display device;
In the shutter step, in the first period, only the first to third primary colors in the multi-primary color display device are transmitted and the fourth to sixth primary colors are blocked by the optical shutter, 2. The image display method according to claim 2, wherein only the fourth to sixth primary colors in the multi-primary color display device are allowed to pass through and the first to third primary colors are blocked. The image display method according to claim 12 ,
A second image decomposition step for separating the second input image into a fifth multi-primary image composed of the first to second N planes;
In the multiplexing step, in the first period, the first to N-th planes of the first multi-primary color image and the N + 1 to N-th planes of the second multi-primary color image are respectively set to a third Assigned to the first to second N planes of the multi-primary color image, and the first to N-th planes of the second multi-primary color image and the N + 1 to second N of the first multi-primary color image in the second period. Are assigned to the first to second N planes of the fourth multi-primary color image, respectively, and in the third period, the first to second N planes of the fifth multi-primary color image are assigned to the sixth multi-primary image, respectively. Assign to the first to second N planes of the primary color image, and output the third multi-primary image, the fourth multi-primary color image, and the sixth multi-primary color image in a time-sharing manner,
In the display step, the images of the first to second N planes of the third multi-primary color image, the fourth multi-primary color image, and the sixth multi-primary color image that are output in the time division manner are mutually connected. Spatially synthesized with the first to second N primary colors having spectral luminance characteristics that do not overlap and displayed on the multi-primary color display device;
In the shutter step, the first to N-th primary colors in the multi-primary color display device are transmitted by the optical shutter in the first period and the N + 1 to N-th primary colors are blocked, and the first In the second period, only the N + 1 to 2N primary colors in the multi-primary color display device are transmitted and the first to N-th primary colors are blocked, and in the third period, the multi-primary color display device in the multi-primary color display device. An image display method for blocking any of the first to second N primary colors. The image display method according to claim 14 ,
N = 3,
In the image decomposition step, the input image is decomposed into first six primary color images composed of first to sixth planes;
In the image conversion step, the first six primary color images are second six primary color images, and the first six primary color images and the second six primary color images are alternately displayed in time. In addition, the first six primary color image and the second six primary color image are temporally synthesized by the integration effect of the human eye, and an image having no correlation with the first six primary color image is displayed. , Converted into a second six-primary-color image composed of first to sixth planes,
In the second image decomposition step, the second input image is decomposed into a fifth six-primary-color image composed of first to sixth planes,
In the multiplexing step, in the first period, the first to third planes of the first six primary color image and the fourth to sixth planes of the second six primary color image are respectively set to the third plane. Assigned to the first to sixth planes of the six primary color images, and the first to third planes of the second six primary color images and the fourth to sixth of the first six primary color images in the second period. Are assigned to the first to sixth planes of the fourth six-primary-color image, respectively, and in the third period, the first to sixth planes of the fifth six-primary-color image are assigned to the sixth plane, respectively. Assigning to the first to sixth planes of the six primary color images, outputting the third six primary color images, the fourth six primary color images, and the sixth six primary color images in a time-sharing manner,
In the display step, the images of the first to sixth planes of the third six-primary-color image, the fourth six-primary-color image, and the sixth six-primary-color image that are output in the time division manner are respectively connected to each other. Spatially synthesized by the first to sixth primary colors having spectral luminance characteristics that do not overlap and displayed on the multi-primary color display device,
In the shutter step, in the first period, only the first to third primary colors in the multi-primary color display device are transmitted and the fourth to sixth primary colors are blocked by the optical shutter, In the second period, only the fourth to sixth primary colors in the multi-primary color display device are transmitted and the first to third primary colors are blocked, and in the third period, the multi-primary color display device An image display method for blocking any of the first to sixth primary colors. The image display method according to claim 13 .
A second image separation step of separating the second input image into a fifth six-primary-color image comprising the first to sixth planes;
In the multiplexing step,
In the first period, the first to third planes of the first six primary color images, the fourth plane of the second six primary color images, and the fourth plane of the fifth six primary color image Addition image, addition image of the fifth plane of the second six primary color image and the fifth plane of the fifth six primary color image, sixth plane of the second six primary color image and the fifth plane The addition images of the six primary color images and the sixth plane are assigned to the first to sixth planes of the third six primary color images, respectively.
In the second period, an added image of a first plane of the first six primary color image and a first plane of the fifth six primary color image, a second plane of the first six primary color image, An addition image of the fifth six-primary-color image with the second plane, an addition image of the third plane of the first six-primary-color image and the third plane of the fifth six-primary-color image, the second The fourth to sixth planes of the six primary color images are assigned to the first to sixth planes of the fourth six primary color image, respectively.
An image display method for outputting the third multi-primary color image and the fourth multi-primary color image in a time-sharing manner. The image display method according to claim 15 , wherein
In the multiplexing step,
In the first period, the first to third planes of the first six primary color images, the fourth plane of the second six primary color images, and the fourth plane of the fifth six primary color image Addition image, addition image of the fifth plane of the second six primary color image and the fifth plane of the fifth six primary color image, sixth plane of the second six primary color image and the fifth plane The addition images of the six primary color images and the sixth plane are assigned to the first to sixth planes of the third six primary color images, respectively.
In the second period, an added image of a first plane of the first six primary color image and a first plane of the fifth six primary color image, a second plane of the first six primary color image, An addition image of the fifth six-primary-color image with the second plane, an addition image of the third plane of the first six-primary-color image and the third plane of the fifth six-primary-color image, the second The fourth to sixth planes of the six primary color images are assigned to the first to sixth planes of the fourth six primary color image, respectively.
In the third period, the first to sixth planes of the fifth six primary color image are assigned to the first to sixth planes of the sixth six primary color image, respectively.
An image display method for outputting the third six primary color image, the fourth six primary color image, and the sixth six primary color image in a time division manner.

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