JP2007300658A - Image observing method and print housing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appreciate a natural color image in a three-dimensional view. <P>SOLUTION: As a plurality of colors to be composed for displaying one color image, first three primary colors RX, GX, BX and second three primary colors RZ, GZ, BZ having spectral distribution characteristics being substantially exclusive mutually for the first three primary colors RX, GX, BX are used. A first image is displayed in the first three primary colors and a second image is displayed in the second three primary colors while being superimposed on the same display medium. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image observation method and a printed matter storage tool for displaying, printing, and observing a stereoscopic color image.

  Conventionally, binocular stereoscopic image reproduction includes a left-right independent display method, a parallax barrier method, a time division method, a polarization method, a red-blue anaglyph method, and the like. Of these various 3D image reproduction methods, only the red-blue anaglyph method can be used to superimpose and display or print a binocular image without using a special mechanism such as projection. is there.

  However, the anaglyph method has been devised as a color anaglyph method, but originally it cannot be used for color images, and of course the color reproducibility is extremely abnormal, and there is a problem that it causes a great sense of incongruity when using even monochrome images. is there.

  Therefore, it is not a technique that can withstand use at the level of appreciating color images, such as photographs and movies, and although it has been recognized by more people than before, it has not generally spread widely.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image observation method and a printed matter storage tool capable of viewing a color image stereoscopically and very naturally. It is in.

  According to the first aspect of the present invention, as the plurality of colors for combining and displaying one color image, the first plurality of colors and the first plurality of colors have substantially mutually exclusive spectral distribution characteristics. Using the second plurality of colors, and observing a display screen in which the first image is superimposed and displayed on the same display medium with the first plurality of colors and the second image with the second plurality of colors In this image observation method, a wavelength selective optical filter that selectively transmits only one of the first and second colors is disposed at least at a part of the position in contact with the display screen. By providing, only one of the first and second images on the display screen can be selectively observed.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first and second images are monocular images for the left and right eyes constituting a stereoscopic image.

  The invention described in claim 3 uses, as a plurality of colors, at least the first three primary colors and the second three primary colors having spectral distribution characteristics that are substantially mutually exclusive with the first three primary colors, Stores a printed product in which the first image is printed on the same print surface as the same display medium with the ink that develops the first three primary colors and the second image is printed with the ink that develops the second three primary colors. A printed matter storage tool that selectively transmits only one of the first and second three primary colors to at least a part of a position where the printed matter is accommodated in contact with the superimposed printing surface. A wavelength-selective optical filter material is provided.

  The invention described in claim 4 is the invention described in claim 3, wherein each of the first and second images is a monocular image for each of the left and right eyes constituting a stereoscopic image.

  According to the present invention, it is possible to view a color image stereoscopically and naturally.

  Prior to describing specific embodiments of the present invention, the basic concept of the present invention will be described first.

  FIG. 1 schematically shows a spectral distribution characteristic of a phosphor of a general color CRT display. However, the peak intensity of each phosphor of the three primary colors RGB is normalized to 1.

  The peak wavelength of each phosphor is B = about 450 [nm], G = about 535 [nm], R = about 620 [nm], which is almost the same as the peak of RGB sensitivity characteristics of human vision, Its distribution shape is not very similar to human vision.

  That is, the half width of the distribution of each phosphor is about 50 to 60 [nm] for both B and G, and about 30 nm for R. Even with such characteristics, high color reproducibility can be realized. ing.

  This is not unusual, and the light-receiving spectral sensitivity characteristics of the imaging device replace the eyes, so if you want good color reproduction for all subjects with various frequency component spectra Requires a high degree of coincidence with the visual RGB characteristics, while the display device substitutes for the subject itself. As long as a stimulus having the same intensity ratio as the stimulus can be applied, high color reproducibility can be realized.

  Therefore, the left-eye image and the right-eye image are displayed on the same display medium using a plurality of colors having spectral distribution characteristics that are substantially mutually exclusive, for example, RGB that are three primary colors of additive color mixture. The optical filter that can transmit only the spectral characteristics that match the image for the left eye on the left-eye lens and the spectral characteristics that match the image for the right eye on the right-eye lens If observation glasses with transmissive optical filters are used, the left and right human eyes are able to give stimuli with the same intensity ratio as the original stimuli to the visual RGB receptors. Thus, the left-eye image and the right-eye image can be separated and visually recognized with high color reproducibility.

  FIG. 2 is used to supplement the above points, and schematically shows an example of the spectral distribution characteristics of three phosphors used in a typical high color rendering fluorescent lamp called a three-wavelength type.

  In the figure, the peak wavelengths of B, G, and R are 435 [nm], 545 [nm], and 615 [nm] that are relatively close to the peak wavelengths of RGB sensitivity characteristics of human vision. The actual characteristics have some “base” portions with a strength of about 10% or less, but the main portions with a high strength have almost such characteristics.

  Since fluorescent lamps are illumination, in order to obtain high color reproducibility (= color rendering), originally, a flat (broad) spectral distribution characteristic is required. Even if it has a narrow band characteristic with an extremely narrow half-value width of only 10 [nm], high color rendering properties can be obtained in practical use.

  In other words, in the case of a display, in principle, even if it is possible to give a stimulus with an appropriate intensity ratio to the RGB receptor of human vision, there is no problem in principle even with narrowband light or multiple monochromatic lights. There will be no.

  As described above, FIG. 2 shows the effectiveness of the color display method using the three primary colors in the narrow band, which is indispensable for the implementation of the present invention, and at the same time, the display as in the following embodiments is manufactured. In this case, it also has the meaning of one proof that a phosphor having a narrow-band emission as actually required exists.

(First embodiment)
A first embodiment in which the present invention is applied to a color CRT display will be described below with reference to the drawings.

  FIG. 3 shows an example of spectral distribution characteristics of six types of phosphors used in the color CRT according to the first embodiment of the present invention.

Six types of phosphors are assigned two for each primary color of RGB, and constitute two sets of three primary colors. Let each set be represented by X and Z. The peak wavelength is
BX, BZ, GX, GZ, RX, RZ
435 [nm], 465 [nm], 520 [nm], 550 [nm], 605 [nm], 635 nm [nm]
And the full width at half maximum is about 20 [nm].

  Therefore, there is a slight overlap over 5 [nm] between the X system and the Z system at the base of the characteristics of the same primary colors BX and BZ, GX and GZ, RX and RZ as shown in the figure. Although it exists, the range is slight and the peak intensity is low, so that a practically sufficient resolution can be realized. Needless to say, if the overlap of the skirt portion is eliminated by using a lamp having a smaller half width as in the three-wavelength fluorescent lamp shown in FIG.

  Further, the peak wavelength is 15 [nm] shorter in the X system and 15 [in the Z system] around the peak wavelengths of about 450 [nm], 535 [nm], and 620 [nm] of the RGB sensitivity characteristics of human vision. nm] is set longer.

  In this way, the deviation of the peak wavelength of the visual RGB sensitivity characteristic from the peak wavelength is set so that the X-system color and the Z-system color are equal to each other, so that the degree of contribution to the visual RGB sensitivity characteristic is both X and Z systems. Both are almost equal.

  Therefore, the emission intensity of both systems for the same display color, that is, the input signal intensity can be made common. In other words, the same color is displayed when the same input is given.

  Such conditions are not essential, and even if there are some errors in the color reproduction of the X and Z systems, it is possible to use them practically, or by adding matrix correction to the RGB characteristics of each system. It is also possible to reduce the color reproduction error.

  FIG. 4 shows the basic structure of the CRT according to the present embodiment, and the basic structure itself is the same as that of a general CRT. That is, the electron beam 13 emitted from the cathode 12 of the electron gun 11 is converged by the grid 14 and is modulated in luminance, and then the emission direction is controlled by the deflection yoke 15 to connect the bright spot to the fluorescent screen 16.

  The difference in structure between a general CRT and the CRT according to the present embodiment will be described below with reference to FIGS.

  FIG. 5A shows an example of a correspondence relationship between the electron guns 21 a to 21 c and the phosphor screen 22 of a general shadow mask type color CRT. The electron beams 23 from the three electron guns 21 a to 21 c arranged in-line selectively reach only the phosphors corresponding to the three primary colors formed on the phosphor screen 22 by the shadow mask 24. FIG. 5B illustrates the arrangement state of the phosphors of the three primary colors R, G, and B formed on the phosphor screen 22.

  FIG. 6A shows an example of the correspondence relationship between the electron gun 11 and the phosphor screen 16 of the shadow mask type color CRT according to the present embodiment. Here, the electron gun 11 has a configuration in which three conventional in-line electron guns are stacked in two stages, that is, a dual in-line configuration.

  The X-line electron guns 11a to 11c are arranged in the upper row, the Z-type electron guns 11d to 11f are arranged in the lower row, and two sets of three primary colors formed on the phosphor screen 16 by the shadow mask 17, a total of six colors. It is configured to selectively reach only the phosphor. FIG. 7B illustrates an arrangement state of the six color phosphors RX, RZ, GX, GZ, BX, and BZ formed on the phosphor screen 16.

  FIG. 7 shows a specific method for displaying a stereo image using the CRT display.

  The three primary colors RX, GX, and BX are used for the left eye L image shown in FIG. 7A, and the three Z primary colors RZ, GZ, and R are used for the right eye R image shown in FIG. Using BZ, they are superimposed and displayed simultaneously on one screen as shown in FIG.

  This superimposed stereo image is an image having RGB primary color information for both the L and R images, that is, a full color image. As described above, the X system and the Z system have overlapping spectral distributions. The spectral distribution characteristics are sufficiently small and substantially mutually exclusive.

  Therefore, the observation glasses described later, in which an optical filter capable of transmitting only the X-system spectral characteristics is provided for the left eye lens and an optical filter capable of transmitting only the Z-system spectral characteristics for the right eye lens, are used. If this is the case, the L image and the R image can be separated and observed with the left eye and the right eye, and as a result, a stereoscopic image can be observed.

  The above-mentioned “substantially mutually exclusive spectral distribution characteristics” means that “the overlap of spectral distributions is sufficiently small that the filters can be separated from each other with a practically usable separation degree”. Such a spectral distribution characteristic ”is meant.

  Next, the configuration of the signal processing circuit of the color CRT display for realizing the stereoscopic image display as shown in FIG. 7 will be described with reference to FIG.

  Here, for example, it is assumed that a time division input signal such as a field sequential stereo signal in an NTSC video signal is supplied to the LR separation unit 31.

  The LR separation unit 31 has a buffer memory therein, and separates synchronization signals such as horizontal / vertical scanning signals and LR identification signals from a given image signal. By sequentially storing (data updating) the input signal in each of the L and R dedicated storage areas provided in the buffer, the L image signal and the R image signal are separated and synchronized, and this is performed at predetermined time intervals of one field. It is simultaneously read and sent simultaneously to the X system processor 32 and the Z system processor 33, respectively.

  The X-system processing unit 32 performs various kinds of signals for driving the display device by performing processing such as synchronization signal separation and video signal processing on the supplied L image signal as necessary in the same manner as a normal video signal. The generated X system signals are sent to the output unit 34.

  The Z system processing unit 33 performs signal processing similar to that of the X system processing unit 32, generates various Z system signals from the R image signal supplied from the LR separation unit 31, and sends it to the output unit 34.

  The output unit 34 includes, for example, the color CRT display and its driving circuit. The output unit 34 outputs the color image for the left eye and the color image for the right eye according to the various X- and Y-system signals given above. Are superimposed and displayed as follows.

  Note that the color CRT display according to the present embodiment described above is difficult to manufacture because the number of electron guns is increased and pixels with twice the vertical density are required as compared with a normal structure. There may be cases. As a solution to this problem, a modification of the present embodiment will be shown.

  That is, it has a structure having three electron guns as in a general CRT, and each phosphor on the phosphor screen has an X-based phosphor RX, GX, BX and a Z-based phosphor RZ, GZ, BZ for each scanning line. And are applied alternately.

  The L and R images are output every other line in an interlaced state and rendered. At this time, the vertical resolution of the L and R monocular images is reduced to ½ of the total number of scanning lines. However, since a stereoscopic image is observed by merging both images, this reduction in resolution is practically a problem. It will not be.

  If the CRT is a non-interlaced scanning type or an interlaced scanning type, if the field rate is a high-speed scanning type of 100 [Hz] or higher, flicker does not occur and the viewer flickers the image. Does not give a sense of incongruity.

  Note that, unlike the time-division presentation method in which a stereoscopic image is observed using a general-purpose color CRT having three electron guns and a spectacle device incorporating a liquid crystal shutter, the L image and the R image in this embodiment are used. The separation of the image from the image is based on the emission spectrum of the phosphor applied to the phosphor screen of the display, so if you use a phosphor with a high afterglow, an interlace that scans at low speed. Even with a scanning color CRT, it is possible to avoid the occurrence of flicker.

(Other embodiments)
Regarding each of the second and subsequent embodiments described below, the spectral distribution characteristics of the color image represented by display and printing are the same as those in the first embodiment, such as the basic principle. It will be explained as an example.

(Second Embodiment)
A second embodiment when the present invention is applied to a light emitting diode (LED) display will be described.

  In this case, similar to the color CRT display shown in FIGS. 4 and 6, the LED display conventionally used only the three primary colors RGB, the X system having the spectral distribution characteristics as shown in FIG. What is necessary is just to set it as the structure which replaced LED of three primary colors RGB of each Z system, and convenient six colors as a light source.

  Note that a normal LED display is an LED array display in which LEDs that are independent for each pixel are arranged in an array, and this second embodiment assumes such a thing, but as a modification, For example, a field-sequential color display device, also called a field-sequential type, which combines a transmissive or reflective monochrome display device such as a liquid crystal display panel that does not use a color filter with color illumination that emits light in a time-sharing manner. And what used LED via the diffusion plate as the light source for the color illumination can also be considered.

For example, when an LED as a light source is used in a field sequential type liquid crystal display panel, six types of LEDs are used, one for each subfield.
RX, RZ, GX, GZ, BX, BZ
And in the subfield period in which RX is lit as an LED, for example, an R component image for the left eye is displayed on a monochrome liquid crystal display panel in synchronization with the lighting. By displaying an image for both left and right eyes corresponding to one field in 6 subfields, the image for both left and right eyes can be superimposed and displayed on one liquid crystal display panel as a result.

  Moreover, although it is not an LED display, it is such a field-sequential type color display device, and a phosphor similar to that of the first embodiment is arranged as a color illumination light source corresponding to a plurality of light source devices. This can also be presented as a variation.

(Third embodiment)
A third embodiment in the case where the present invention is applied to a color liquid crystal display will be described below.

  In this case, in the case of a general color liquid crystal display panel, the color coding is performed by the dot sequential filter of the three primary colors RGB, and this is applied to the X system and the Z system having the spectral transmission characteristics as shown in FIG. What is necessary is just to replace with the thing which has the color filter which comprises one pixel by three primary colors RGB of each system, and convenient six colors.

(Fourth embodiment)
A case where the present invention is applied to an ink jet printer will be described as a fourth embodiment with reference to the drawings.

  In the case of an ink jet printer, conventional coloring is performed using three complementary color inks of Cy (cyan), Mg (magenta), and Ye (yellow), which are three subtractive primary colors in principle.

  In the printer as a product, the deviation from the ideal characteristics of Mg is particularly large, so that the ideal ink characteristics cannot be obtained, and the economy when performing monochrome printing of documents etc. as well as color printing In consideration of the characteristics, black (BK) ink, which is the fourth color, is often used. However, since this is not essential, the present invention will be clarified by simplifying the description regarding this embodiment. Therefore, it is assumed that three complementary color inks of Cy, Mg, and Ye having good color development characteristics are used and BK is not used.

  FIG. 9 schematically shows the spectral distribution characteristics of three-color inks used in a general ink jet printer. On the other hand, FIG. 10 shows an example of the spectral distribution characteristics of six types of ink used in the ink jet printer according to the fourth embodiment.

The six types of ink shown in FIG. 10 are assigned two to three complementary colors Cy, Mg, Ye, which are three subtractive primary colors, and constitute two sets of three primary colors. If each pair is denoted by X and Z,
CyX, CyZ, MgX, MgZ, YeX, YeZ
There are two peak wavelengths for each of these colors, but since they are complementary colors, there is an overlap for the same set, so the peak wavelengths are in order from the low frequency side.
430 [nm], 470 [nm], 515 [nm], 555 [nm], 600 [nm], 640 [nm]
It becomes six.

  This ink jet printer has three ink tanks for printing X system images and three ink tanks for printing Z system images, and print heads corresponding to these. The above-described six colors of ink are applied to each. In each of the X system and the Z system, an L image and an R image are input in the same manner as in FIGS. 7 and 8 described above, and are superimposed and printed on paper.

  Note that there are some ink jet printers based on only the three primary colors that use six colors as color inks, and therefore the ink tank mounting portion described in the fourth embodiment has 6 It is assumed that ink tanks of colors, that is, CyX, CyZ, MgX, MgZ, YeX, and YeZ are mounted, and the print control system circuit prints the left and right eye images corresponding to FIG. If this is changed, this embodiment can be realized relatively easily.

  It should be noted that the present invention can be applied to a printer other than an ink jet printer, for example, a sublimation thermal transfer printer. In that case, for example, the three-color ink sheet used conventionally may be changed to the above-mentioned six colors.

  In the fourth embodiment, subtractive color mixture ink (pigment) suitable for the reflection medium is used as the three primary colors. However, depending on the purpose, for example, when printing on a transmissive medium such as so-called slide creation, the additive color mixture three primary colors RGB Ink (pigment) may be used.

(Fifth embodiment)
Hereinafter, a fifth embodiment in which the present invention is applied to observation glasses for observing a display screen or a stereo image of a printed matter as described in the first to fourth embodiments will be described with reference to the drawings.

  FIG. 12 shows an external configuration of the observation glasses 41. Here, the external glasses are shown to have the same configuration as that of general glasses for correcting vision such as myopia, hyperopia, and astigmatism.

  Therefore, the lens for the left eye of the observation glasses 41 is provided with an X-type filter 42 adapted to the spectral distribution characteristic of the L image, while the lens for the right eye is adapted to the spectral distribution characteristic of the R image. The Z-type filter 43 is disposed.

FIG. 11 illustrates the spectral distribution characteristics of the X system filter 42 and the Z system filter 43. The L image = left-eye X-system filter 42 shown in FIG. 11 (1) and the R image = right-eye Z-system filter 43 shown in FIG.
450 [nm], 492.5 [nm], 535 [nm], 597.5 [nm], 620 [nm]
In FIG. 2, the sharp-cut band-pass characteristic that changes sharply is obtained, and the transmission and cut-off frequency bands are reversed.

  Therefore, when observing a stereo image superimposed (printed) on the display screen or printed matter described in the first and fourth embodiments, the X-type filter 42 of the left eye lens of the observation glasses 41 is used. In the X system, three primary colors RX, GX, BX (or CyX, MgX, YeX) only, and in the right eye lens Z system filter 43, only the Z system three primary colors RZ, GZ, BZ (or CyZ, MgZ, YeZ) are used. Are transmitted through. Therefore, the L image and the R image are separated and visually recognized and observed by the left and right eyes.

  The optical filter such as the X-type filter 42 and the Z-type filter 43 can be manufactured by coating a transparent member such as glass with a substance such as metal on a multilayer thin film.

  In the present embodiment, the observation glasses 41 are simply described as having the same configuration as normal glasses for correcting vision, but the shape and the like are not limited. For example, glasses for correcting vision It may be an over-glass type that can be worn regardless of whether it is used, or it should be a clip-on type that is worn on top of the glasses for users who use glasses for correcting vision. Is also easily considered.

(Sixth embodiment)
Hereinafter, the present invention is applied to a print holder that stores a printed matter such as a photographic print printed by the printer described in the fourth embodiment, and that also functions as a card carrier for carrying it as necessary. Embodiments will be described with reference to the drawings.
FIG. 13A shows an external configuration of such a print holder 51, and FIG. 13B shows a partial cross-sectional structure along the line bb in FIG. Here, in order to store one printed matter 52 with a slight margin, it is assumed that the three sides of the pair of sheets 53 and 54 are attached to form a bag shape.

  Here, it is assumed that at least one of the sheets 53 and 54, for example, the sheet 53 is formed of a transparent film, and the printed surface of the printed material 52 is inserted toward the sheet 53 so that the printed material 52 is not stained. It is possible to appreciate the printed contents.

  However, the transparent sheet 53 is not a simple transparent member, but has transmission spectral distribution characteristics equivalent to those of the X-type filter 42 or the Z-type filter 43 shown in FIG.

  Therefore, when the printed matter 52 in which the L image and the R image are superimposed and printed is inserted, only the L image or the R image can be selectively observed. Originally, the left and right images are superimposed and printed. Therefore, it is possible to handle the image as if it were a normal monocular print without being conscious of a stereo photograph or the like that is unnaturally “blurred”.

  As a modification of the present embodiment, for example, in a photo album that can store a plurality of photo prints, the protective sheet on the observation surface has transmission spectral distribution characteristics equivalent to those of the X-type filter 42 or the Z-type filter 43. What consists of the member which was made is also considered. Also in this modification, it is possible to achieve the same effect as that shown in FIG.

  According to the first to sixth embodiments, a full-color stereo image can be observed, and an abnormal sensation does not occur in color reproducibility like the conventional red-blue separation type anaglyph.

  In addition, since polarized light is not used as in the method of viewing stereo images using polarized glasses, the present invention can be applied to a structure using polarized light for other purposes, such as a liquid crystal display panel.

  Furthermore, it is possible to “display” a stereo image (in a broad sense) not only on a display device that directly outputs a light image, such as a CRT display, a liquid crystal display panel, or an LED display, but also on a printed matter.

  In addition, in the sixth embodiment, even a printed matter that is unnaturally “blurred” because the images of the left and right eyes are superimposed when viewed directly with the naked eye. By using the print holder and album as shown, it is possible to handle the same as a normal monocular image.

  In each of the above embodiments, it has been described that an image in which two images for the left and right eyes are superimposed is displayed or printed and observed. However, the wavelength setting in the spectral distribution characteristics is appropriately set. For example, it is possible to extend the display to those in which images of three or more systems are superimposed and displayed.

  In addition to application to stereo images, for example, there are uses that require observation of a single image while displaying multiple images in a superimposed manner, such as a disassembled photograph that shows a series of operations continuously. Depending on the idea, it can be applied to any application, such as superimposing multiple images with completely different contents such as causes, processes, and results on a single printed matter.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

The figure which shows the spectral distribution characteristic of the fluorescent substance of a general color CRT display for demonstrating the basic concept of this invention. The figure which shows the spectral distribution characteristic of the fluorescent substance of the general three wavelength type fluorescent lamp for demonstrating the basic concept of this invention. The figure which shows the spectral distribution characteristic of the fluorescent substance of the color CRT display which concerns on the 1st Embodiment of this invention. The figure which shows the structure of the color CRT display which concerns on the embodiment. The figure which shows an example of the correspondence of the electron gun and fluorescent substance of a general shadow mask type color CRT. The figure which shows an example of the correspondence of the electron gun and fluorescent substance of the shadow mask type color CRT which concern on the 1st Embodiment of this invention. The figure which shows the superimposed display method of the image for left eyes and the image for right eyes which concerns on the embodiment. The block diagram which illustrates the composition of the signal processing system concerning the embodiment. The figure which shows the spectral distribution characteristic of the color ink used with a general ink jet type printer. FIG. 10 is a diagram illustrating spectral distribution characteristics of color ink used in an ink jet printer according to a fourth embodiment of the present invention. The figure which shows the spectral distribution characteristic of each optical filter used for the observation spectacles concerning the 5th Embodiment of this invention. The figure which shows the external appearance structure of the observation glasses based on the embodiment. The figure which shows the structure of the print holder which concerns on the 6th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Electron gun, 12 ... Cathode, 13 ... Electron beam, 14 ... Grid, 15 ... Deflection yoke, 16 ... Phosphor screen, 17 ... Shadow mask, 21a-21c ... Electron gun, 22 ... Phosphor screen, 23 ... Electron beam, 24 ... shadow mask, 31 ... LR separation unit, 32 ... X system processing unit, 33 ... Z system processing unit, 34 ... output unit, 41 ... observation glasses, 42 ... X system filter, 43 ... Z system filter, 51 ... print Holder, 52 ... printed matter, 53 ... (transparent) sheet, 54 ... sheet.

Claims (4)

As a plurality of colors for combining and displaying one color image, a first plurality of colors and a second plurality of colors having spectral distribution characteristics that are substantially mutually exclusive with the first plurality of colors An image observation method for observing a display screen in which a first image is superimposed and displayed on the same display medium with the first plurality of colors and a second image with the second plurality of colors,
By disposing a wavelength-selective optical filter that selectively transmits only one of the first and second plurality of colors at least at a part of the position in contact with the display screen. An image observation method characterized in that only one of the first and second images can be selectively observed.   The image observation method according to claim 1, wherein each of the first and second images is a monocular image for each of left and right eyes constituting a stereoscopic image. As the plurality of colors, at least the first three primary colors and the second three primary colors having spectral distribution characteristics that are substantially mutually exclusive with the first three primary colors are used, and the first image is the first color. A printed matter storage tool for storing a printed matter in which the second image is superimposed and printed on the same printing surface of the same display medium with the ink that develops the second primary color by the ink that develops the three primary colors.
A wavelength-selective optical filter material that selectively transmits only one of the first and second three primary colors is disposed at least at a part of the position that comes into contact with the superimposed printing surface in a state where the printed matter is stored. A printed matter storage tool characterized by being provided.   4. The printed matter storing tool according to claim 3, wherein each of the first and second images is a monocular image for each of the left and right eyes constituting a stereoscopic image.

Images