JP2022064254A - Color distant view image device - Google Patents

Abstract

To solve the problem in which a color of a color image observed as a distant view with respect to a color image of a color image display unit changes, in a color distant view image device having a configuration in which a plurality of diffracted light beams are generated by a diffraction phenomenon of a plurality of minute openings of an optical mask closely arranged on the color image display unit and a light wave obtained by converting the plurality of diffracted light beams with a lens is observed with both eyes.SOLUTION: Minute openings of an optical mask corresponding to a three-color color light emitting unit constituting a color pixel of a color image display unit are set so that values of ratios of emission light wavelengths of the three-color color light emitting unit to opening diameters are substantially equal. As a result, diffracted light beams from the three-color color light emitting unit have almost an equal spread angle, and discoloration of an observed color image is prevented.SELECTED DRAWING: Figure 2

Description

The present invention relates to a color distant view image device for observing a color image displayed as an image as a distant view (a distant view or an object).

When a person actually sees a distant view, the distance between the object constituting the distant view and both eyes is sufficiently long, so that the binocular parallax, which is the angle formed by the two lines connecting both eyes and one point of the object, is almost zero. .. Furthermore, since the distance from each point of the object is sufficiently long, it becomes almost a plane wave, and the focus adjusting action of the crystalline lens of both eyes thins the crystalline lens so as to form an image of the planar wave on the retina, and the lens is focused in the distance. When both binocular disparity and focus adjustment are established at the same time, it is naturally recognized as a distant view image.

Although the distant view image device is not generally known, there is a stereoscopic image device for observing a stereoscopic image as a device of similar technology. Many methods have been proposed for stereoscopic image devices. As one method, an image for the right eye and an image for the left eye whose deflection directions are switched by a liquid crystal display device are created, and the right eye and the left eye are used through the deflecting glasses. A device for stereoscopically viewing from the binocular disparity between the right eye and the left eye by observing each image is known.

However, when observing a distant view with the above stereoscopic image device, if the same image is displayed at the same position with respect to the right eye and the left eye, the binocular disparity can be made almost zero, but on the other hand, the focus adjusting effect of both eyes is There is a problem that it works on the image of the display device in the vicinity and does not act as a binocular focus adjustment when looking at a distance. Observers sometimes had eye fatigue and sickness because the binocular parallax and the sense of distance due to accommodation did not match.

Further, another method is known in which a sense of perspective is obtained by observing an image with both eyes through one lens. Japanese Patent Application Laid-Open No. 1997-243960 also proposes a stereoscopic image device for observing an image display unit with both eyes through a varifocal lens. A three-dimensional image is observed by connecting virtual images of an image display unit while changing the focal length of a varifocal lens.

However, in the method of observing an image with both eyes through one lens, even if the image display unit is simply placed on the focal plane of the lens and a virtual image at infinity is observed through the lens, the image is observed as if it is far away. There was a drawback that it could not be done.

In order to overcome this shortcoming, a distant view image device is shown in Japanese Patent Application Laid-Open No. 2018-45217. By observing the generated diffracted light with both eyes through a lens, it was shown that the binocular disparity becomes zero and at the same time the focus adjustment can be adjusted to a distant position, and the image can be observed as a natural distant view.

Japanese Unexamined Patent Publication No. 2018-45217

The problem to be solved by the present invention is that in the distant view image device shown in Japanese Patent Application Laid-Open No. 2018-45217, when the image display unit of the image display device displays a color image, the observed color distant view image is the original image display unit. The problem is that the color of the color image is changed.

In the color distant view image apparatus of the present invention, a plurality of diffracted lights are generated by a diffraction phenomenon of a plurality of minute openings of an optical mask closely arranged in a color image display unit, and the plurality of diffracted lights are converted by one lens. The minute aperture of the optical mask corresponding to the three-color color light emitting part that constitutes the pixels of the color image display part is the opening diameter of the minute opening according to the different emission wavelengths of the color light emitting part. The most important feature is that the values of the ratio of the emission wavelength and the aperture diameter of the three color light emitting portions are set to be substantially equal to each other.

In the color distant view image apparatus of the present invention, the spread angle of the diffracted light generated by diffraction from the minute openings provided corresponding to the three color light emitting portions is made almost the same even if the emission wavelength is different, so that the observer can use the same. When observing a distant view image, it has the effect of observing a color image without discoloration with respect to the color image of the color image display unit.

It is a schematic diagram of Example 1 of the color distant view image apparatus of this invention. It is a schematic diagram of the color image display part with the optical mask used in this invention. It is explanatory drawing of the diffraction phenomenon by the minute opening used in this invention. It is a schematic diagram which shows the 2nd arrangement of the optical system in Example 1 of this invention. It is a schematic diagram of Example 2 of the color distant view image apparatus of this invention.

The first aspect of the present invention has realized the purpose of observing a color image as a distant view by configuring a two-dimensional color image display device having a minute aperture and a lens having a diameter larger than that of both eyes.

The second aspect of the present invention aims at observing a color image as a distant view with a two-dimensional color image display device for the right eye having a minute aperture, a lens for the right eye having a diameter larger than that of the right eye, and a minute lens. It was realized by the configuration of a two-dimensional color image display device for the left eye having an opening and one lens for the left eye having a diameter larger than that of the left eye.

FIG. 1 is a schematic view of a first embodiment of the color distant view image device of the present invention, wherein the color distant view image device 10 includes a color image display unit 1, an optical mask 4, and a lens 2. Reference numeral 1 denotes a color image display unit of a color image display device (not shown), which is a two-dimensional color image display unit such as a liquid crystal display panel or an organic EL panel. The color image display unit 1 displays a color image by arranging a plurality of pixels 8 having three color light emitting units that emit light in red (R), green (G), and blue (B) in two dimensions. Reference numeral 2 is an optical lens, for example, a convex glass lens or a Fresnel lens made of resin, which is not limited to a single lens but is an optical system including a plurality of lenses and optical components, but hereinafter, it is simply referred to as a lens. The front focal length is located at the focal length f from the principal point 9 of the lens 2, and the aperture is D. The number of lenses 2 is one with respect to the color image display unit 1, and the optical axis of the lens 2 is arranged perpendicular to the center of the color image display unit 1. 4 is integrally created in the color image display unit 1 with an optical mask, or is closely attached to the color image display unit 1. The position of the optical mask 4 is located at the position of the anterior focal point of the lens 2 or is located between the anterior focal point of the lens 2 and the principal point. Reference numeral 3 is both eyes of the observer, and the observation position is the rear side of the lens 2 having the rear focal point of the lens 2. The aperture D of the lens 2 is at least larger than the binocular distance (about 65 mm).

The optical mask 4 is formed on a thin transparent film base material or glass base material by vapor deposition or coating on a thin metal film or resin film opaque to light, and then the opening is formed by a laser processing machine or an etching process. It is manufactured by removing the metal film and resin film. Alternatively, it is made using a silver halide photography process. When the color image display unit 1 is a liquid crystal display panel, the built-in color filter and the optical mask 4 may be integrally created. The color image display unit 1 of another method can also be manufactured in the manufacturing process.

FIG. 2 is a schematic view of a color image display unit 1 to which the optical mask 4 used in the present invention is attached, and is a front view (A) and a side view (B). As shown in the enlarged pixel view of the front view (A), the pixel 8 of the color image display unit 1 is lined with a light emitting unit R that emits red light, a light emitting unit G that emits green light, and a light emitting unit B that emits blue light. The optical mask 4 has an opening 5, an opening 6, and an opening 7 which are light transmitting portions, and the other portion is a light opaque portion. The opening 5, the opening 6, and the opening 7 of the optical mask 4 are arranged on the irradiation side of the light emitting portion R, the light emitting portion G, and the light emitting portion B, respectively. The opening 5, the opening 6 and the opening 7 are circular or rectangular, and one or more are arranged in one dimension or two dimensions. The opening diameter of the opening 5 is d1, the opening diameter of the opening 6 is d2, and the opening diameter of the opening 7 is d3.

Assuming that the emission wavelengths of the light emitting unit R, the light emitting unit G, and the light emitting unit B arranged in the pixel 8 of the color image display unit 1 in FIG. 2 are λ1, λ2, and λ3, λ1> λ2> λ3. In the RGB color system of CIE (International Commission on Illumination), the three primary colors of the spectrum are red (R) of 700 nm, green (G) of 546.1 nm, and blue (B) of 435.8 nm.

FIG. 3 is an explanatory diagram of a light diffraction phenomenon due to a minute aperture used in the present invention. As is generally known, when an optical mask 14 having an aperture 15 having an aperture diameter d is irradiated with irradiation light 12 which is a plane wave having a wavelength λ, the diffracted light 13 spreads with respect to the irradiation direction 11 and diverges at an angle θ due to a diffraction phenomenon. Occurs. The diffracted light 13 has a circular wavefront that diverges in a plane, and when the opening 15 is circular, it becomes a diverging spherical wave. The light intensity distribution of the diffracted light 13 has the maximum light intensity in the irradiation direction 11 of the irradiation light 12, attenuates as the diffraction angle increases, and becomes zero once at the spread angle θ. At this time, since the aperture diameter d and the spread angle θ have a relationship of d × sin θ = 1.22λ, the spread angle θ of the diffracted light 13 is determined by the value d / λ of the ratio of the aperture diameter d and the wavelength λ. From this, if the aperture diameter d is adjusted to make the ratio value d / λ the same for a plurality of irradiation lights 12 having the same light intensity with different wavelengths λ, diffraction having the same spread angle θ and the same light intensity distribution. Light is obtained.

In the present invention, the opening diameter d1, the opening diameter d2, and the opening diameter d3 are set so that the values of d1 / λ1, d2 / λ2, and d3 / λ3 are substantially equal in FIG. Since λ1> λ2> λ3, it is set so as to satisfy at least d1> d2> d3. As a result, each diffracted light generated from the opening 5, the opening 6, and the opening 7 in FIG. 1 has substantially the same spreading angle θ.

The operation of the present invention will be described with reference to FIGS. 1 and 2. When the light emitted from the light emitting unit R of the pixel 8 of the color image display device 1 irradiates the plurality of openings 5 of the optical mask 4, a plurality of diffracted lights are generated from the plurality of openings 5 due to the diffraction phenomenon. Similarly, when the light emitted from the light emitting unit G and the light emitting unit B irradiates the plurality of openings 6 and the plurality of openings 7 of the optical mask 4, a plurality of diffracted lights are generated due to the diffraction phenomenon. As described above, the aperture diameters d1, d2, and d3 are set so that the spread angles θ of the diffracted light by the openings 5, the openings 6, and the openings 7 are substantially equal. Here, the plurality of diffracted lights from the plurality of openings 5, openings 6, and openings 7 of the pixel 8 are combined. Notated as diffracted light WI from pixel 8. The optical mask 4 is arranged on the front focal length at the position of the focal length f from the lens 2, and the diffracted light WI incident on the lens 2 becomes a plane wave WO by the lens 2. The plane wave WO travels parallel to the line Q connecting the pixel 8 and the center of the lens 2 and is incident on both eyes 3 of the observer. When the plane wave WO is incident on both eyes 3 of the observer, the binocular disparity is almost zero and the accommodation can be adjusted to a distance at the same time. Observe that the image is in the distance. Since the observer also observes the other pixels 8 of the color image display unit 1 in the same manner, the observer observes that the color image displayed on the color image display unit 1 is in the distance and naturally recognizes that the color image is a distant view. ..

FIG. 4 is a schematic view showing a second arrangement of the optical system in the first embodiment of the present invention. The optical mask 4 is arranged between the front focal point of the lens 2 and the principal point 9 of the lens 2. When the distance a between the position of the optical mask 4 and the principal point 9 of the lens 2 is shorter than the front focal length f of the lens 2, a virtual image of the optical mask 4 is created at a position b at a distance b from the principal point 9 of the lens 2. .. B can be obtained from the lens imaging formula 1 / a-1 / b = 1 / f. Similar to FIG. 1, diffracted light WI is generated from the pixel 8 due to the diffraction phenomenon, and the diffracted light WI incident on the lens 2 becomes a light wave WX diverged by the lens 2, which is equivalent to the light wave emitted from S at the virtual image position. Become. The light wave WX travels along the line Q connecting the pixel 8 and the center of the lens 2 and is incident on both eyes 3 of the observer. Since the observer can adjust the binocular disparity and the focus adjustment to the virtual image at a distance b at a distance, he observes that the color image displayed on the color image display unit 1 is at the virtual image position at a distance b at a distance. It naturally recognizes that the color image is a distant view.

In the present invention, since diffracted light having substantially the same spreading angle θ is formed from a plurality of openings corresponding to the light emitting portion R, the light emitting portion G, and the light emitting portion B of the pixel 8, the intensity distribution of the diffracted light of the three colors is substantially the same. equal. Through the lens 2, the observer can observe the same color as the pixel 8 of the color image displayed on the color image display unit 1, and can prevent discoloration of the color image. As in the conventional case, when the aperture diameter of the optical mask corresponding to the color light emitting portion of the pixel is the same, the spreading angle θ of the diffracted light from the aperture of the optical mask differs depending on the different emission wavelengths of the color light emitting portion. Therefore, a difference occurs in the intensity distribution of the diffracted light of the three colors, and the observed pixel color is different from the pixel color of the image display unit, and the color image is discolored and observed.

In the present invention, the value d / λ of the ratio of the aperture diameter d to the wavelength λ is preferably in the range of 1/2 to 4. When the ratio value d / λ is 4 or more, the diffraction angle θ becomes small, and the range in which the diffracted light can be observed becomes narrow. When the ratio value d / λ is ½ or less, the aperture diameter d is narrower than the wavelength λ, so that the amount of diffracted light generated decreases. Further, the numbers of the openings 5, the openings 6, and the openings 7 are adjusted so that the light diffracted by the optical mask 4 has the same transmittance with respect to the light emitting unit R, the light emitting unit G, and the light emitting unit B.

FIG. 5 is a schematic view showing Example 2 of the color distant view image apparatus of the present invention. In the color distant view image apparatus 17 of the second embodiment, the right-eye configuration and the left-eye configuration are arranged adjacent to each other, and both configurations have the same configurations as those of the first embodiment described with reference to FIGS. 1 and 2. The configuration for the right eye is located in the center of the color image display device 21 for the right eye, the optical mask 24 for the right eye arranged closely or integrally with the color image display unit 21 for the right eye, and the color image display unit 21 for the right eye. Since it is one right eye lens 22 having an optical axis perpendicular to the same as that of the first embodiment, detailed description thereof will be omitted. The configuration for the left eye is also the color image display unit 25 for the left eye, the optical mask 28 for the left eye, and the lens 26 for the left eye, which are the same configurations as those for the right eye as in the configuration for the right eye, and detailed description thereof will be omitted. do. For observation, the right eye 23 is placed behind the right eye lens 22, and the left eye 27 is placed behind the left eye lens 26. The aperture of the right eye lens 22 is at least larger than that of the right eye pupil, and similarly the aperture of the left eye lens 26 is at least larger than that of the left eye pupil.

The right-eye color image display device 21 and the left-eye color image display device 25 are the same as the color image display device 1 of the first embodiment described with reference to FIG. The optical mask 24 for the right eye and the optical mask 28 for the left eye are the same as the optical mask 4 of the first embodiment. As described with reference to FIG. 2, the opening 5 having the aperture diameter d1 and the opening 6 having the aperture diameter d2 correspond to the light emitting unit R, the light emitting unit G, and the light emitting unit B whose emission wavelengths are λ1, λ2, and λ3, respectively. And an opening 7 having an opening diameter d3 is provided, and the values of d1 / λ1, d2 / λ2, and d3 / λ3 are set to be substantially equal to each other. Since λ1> λ2> λ3, it is set so as to satisfy at least d1> d2> d3. As a result, the diffracted light generated from the openings 5, the openings 6, and the openings 7 have substantially the same diffraction angle θ.

The operation of the color image forming apparatus 17 of the second embodiment will be described with reference to FIG. The configuration for the right eye and the configuration for the left eye operate in the same manner as in the first embodiment. The light emitted from the light emitting unit R, the light emitting unit G, and the light emitting unit B in one color pixel P2 of the color image display unit 21 for the right eye has a plurality of diffracted waves due to the plurality of openings of the optical mask 24 for the right eye. Occurs and diverges. Since the diffraction angles θ of the plurality of diffracted waves are the same, it can be regarded as almost one diffracted wave WI2. Since the optical mask 24 for the right eye of the color pixel P2 is on the front focal plane of the lens 22 for the right eye, the diffracted light WI2 incident on the lens 22 for the right eye becomes a plane wave WO2 and is incident on the right eye 23. Similarly, the light emitted from the pixel P3 of the color image display unit 25 for the left eye becomes diffracted light WI3 by the optical mask 28 for the left eye, and further becomes a plane wave WO3 by the lens 26 for the left eye and is incident on the left eye 27. .. The plane wave WO2 and the plane wave WO3 are separately incident on the right eye 23 and the left eye 27, but the line Q2 connecting the pixel P2 and the center of the right eye lens 22 and the line connecting the pixel P3 and the center of the left eye lens 26. When Q3 is parallel, it is equivalent to the incident of one plane wave, and is equivalent to the plane wave WO1 of the first embodiment. The observer's right eye 23 and left eye 27 have almost zero binocular disparity with respect to the plane wave WO2 and the plane wave WO3, and the focus adjustment is adjusted to a distant place. Since other pixels are also observed in the same manner, when the same color image is displayed on the right eye color image display unit 21 and the left eye color image display unit 25, it is naturally observed that the color image is far away. Similar to the first embodiment, the diffracted light from the openings of the color light emitting portions has substantially the same diffraction angle θ, so that discoloration of the color pixels can be prevented and discoloration of the color image can be prevented.

In the second embodiment as well as in the first embodiment described with reference to FIG. 4, the right eye lens 22 and the left eye lens 26 can be arranged at positions forming a virtual image in the right eye configuration and the left eye configuration. .. In this case, in FIG. 5, the color image display unit 21 for the right eye and the color image display unit 25 for the left eye move the positions of the displayed images to the left and right so that the virtual images of P2 and P3 match. Since the light wave WO2 and the light wave WO3 diverging as if they were emitted from the matching virtual image of P2 and P3 are incident on both eyes, the observer can observe the image at the position of the virtual image.

When the color image display unit 1 of the first embodiment is a liquid crystal display panel, the liquid crystal display panel is configured in the order of a backlight source, a liquid crystal element, and a color filter, and the optical mask 4 is arranged after the color filter. Further, even when the optical mask 4 is arranged in front of the color filter, the diffracted light generated by the optical mask 4 passes through the color filter, and as a result, the same diffracted light as in the case where the optical mask 4 is arranged after the color filter is obtained. .. The same applies to Example 2.

A variable focus lens can be used as the lens 2 of the first embodiment. When the focal length of the variable focus lens is changed, the position of the virtual image of the pixel 8 can be moved along the line Q connecting the center of the pixel 8 and the lens 2, and the perspective of the image to be observed can be changed. The same applies to the second embodiment, and the perspective of the observed image can be changed by using the right eye lens 22 and the left eye lens 26 as a variable focus lens.

In the first embodiment, if the lens 2 is made large and the aperture D is sufficiently large, the observer can move the observation position of both eyes 3 to observe, and further, a plurality of observers can observe at the same time.

In Examples 1 and 2, the diffraction phenomenon using the aperture of the optical mask has been described, but the same diffraction phenomenon occurs even if the light source itself is an LED or LASER manufactured by a minute light source similar to the aperture of the optical mask. Can be obtained and is within the scope of the present invention.

Since the color distant view image device can observe a color moving image or a color image of a landscape as a distant view, it can be widely used for home use such as landscape photography and viewing of mountain photographs, and for business use such as travel catalogs and real estate catalogs. It can be used as a color distant view image device by combining an optical mask and a lens in the color image display section of a personal computer, tablet, digital camera or smartphone, and if the optical mask is built in the color image display section, the color distant view can be obtained simply by combining it with the lens. It can be used as an image device, and the functions of the color distant view image device can be used as an application of the main body.
In the second embodiment, since the configuration corresponds to the right eye and the left eye, the focal length of the lens can be shortened and the device can be miniaturized, so that it can be used for a wearable terminal or a portable application.

1, 21, 25 Color image display unit 2, 22, 26 Lens 3 Binocular 4, 14, 24, 28 Optical mask 5, 6, 7, 15 Aperture 8, P2, P3 Pixel 10, 17 Color distant view image device 23 Right Eye 27 Left eye

Claims (2)

A color image display unit that displays a color image by two-dimensionally arranging a plurality of color pixels composed of a light emitting unit R that emits red light, a light emitting unit G that emits green light, and a light emitting unit B that emits blue light.
A plurality of openings having an opening diameter d1 arranged with respect to the light emitting unit R, a plurality of openings having an opening diameter d2 arranged with respect to the light emitting unit G, and an opening arranged with respect to the light emitting unit B. An optical mask having a plurality of openings with a diameter d3 and d1>d2> d3.
One lens system with a larger aperture than the binocular distance, which has the position of the optical mask between the anterior focal point and the principal point.
It is provided with an observation position for observing a plurality of diffracted lights generated by a diffraction phenomenon from the plurality of openings of the optical mask with both eyes through the lens system.
A color distant view image device characterized by observing a color image displayed by the color image display unit as a distant view. A color image display unit for the right eye that displays a color image by arranging color pixels consisting of a light emitting unit R that emits red light, a light emitting unit G that emits green light, and a light emitting unit B that emits blue light in two dimensions. When,
A plurality of openings having an opening diameter d1 arranged with respect to the light emitting unit R, a plurality of openings having an opening diameter d2 arranged with respect to the light emitting unit G, and an opening arranged with respect to the light emitting unit B. An optical mask for the right eye, which has a plurality of openings with a diameter of d3 and has d1>d2> d3.
One right eye lens system with a larger aperture than the right eye pupil having the position of the right eye optical mask between the anterior focal point and the principal point.
A right eye observation position for observing a plurality of diffracted lights generated by a diffraction phenomenon from a plurality of openings of the right eye optical mask with the right eye through the right eye lens system.
A color image display unit for the left eye that displays a color image by arranging color pixels consisting of a light emitting unit R that emits red light, a light emitting unit G that emits green light, and a light emitting unit B that emits blue light in two dimensions. When,
A plurality of openings having an opening diameter d1 arranged with respect to the light emitting unit R, a plurality of openings having an opening diameter d2 arranged with respect to the light emitting unit G, and an opening arranged with respect to the light emitting unit B. An optical mask for the left eye, which has a plurality of openings with a diameter of d3 and has d1>d2> d3.
One left eye lens system with a larger aperture than the left eye pupil having the position of the left eye optical mask between the anterior focal point and the principal point.
The left eye optical mask is provided with a left eye observation position for observing a plurality of diffracted lights generated by a diffraction phenomenon from the plurality of openings of the left eye optical mask with the left eye through the left eye lens system.
A color distant view image device characterized by observing an image displayed by the right eye color image display unit and the left eye color image display unit as one distant view.

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