JP2889458B2 - Direct-view display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct-view display device, and more particularly to a direct-view display device suitably used as a display means such as a viewfinder of a video camera and a spectacle-type scope of a virtual reality system.

[0002]

2. Description of the Related Art A display panel used in the present invention does not emit light by itself, but its transmittance changes according to a drive signal, and the intensity of light from a separately provided light source is modulated to form an image or a character. Is a transmissive display panel that displays. Examples include liquid crystal display panels, electrochromic displays, and translucent ceramics such as PLZT, among which liquid crystal display panels are widely used in portable televisions, word processors, projectors, and the like.

When performing full color display in a portable television or a word processor using such a liquid crystal display panel, each pixel of the display panel is provided with red, green and blue color filters. Also, in the case of a viewfinder of a video camera, a scope of a virtual reality system, or the like, a color filter is similarly provided to perform full color display.

[0006] The pixel electrodes of the liquid crystal display panel are regularly arranged in a matrix. Independent drive voltages are respectively applied to these pixel electrodes, and images and characters are displayed by changing the optical characteristics of the liquid crystal. Methods for applying an independent drive voltage to each pixel electrode include a simple matrix method and an active matrix method provided with a non-linear two-terminal element or a three-terminal element. In particular, the latter is a MIM (metal-insulator-metal) element or TFT
A switching element such as a (thin film transistor) element;
Since it is necessary to provide a wiring electrode for supplying a driving voltage to the pixel electrode, the area of the effective pixel opening occupying the pixel section, that is, the aperture ratio is reduced. Furthermore, since a proper drive voltage is not applied to the liquid crystal present in the region where the switching elements and the wiring electrodes are formed, the original display operation is not performed. Therefore, a light shielding means called a black matrix is provided, and the light transmitted through the region is blocked by the light shielding means. In such a liquid crystal display panel, the light-shielded portion due to the black matrix is observed as stripes.

In the direct-view display device used for a viewfinder of a video camera, a scope of a virtual reality system, or the like, when the above-described active matrix driving is performed, pixel electrodes, switching elements, and wiring electrodes are densely arranged in a relatively small area. Must be provided. However, it is difficult to form the switching element and the wiring electrode to a size smaller than a certain size due to restrictions on electrical performance and manufacturing technology. Therefore, the smaller the pitch of the pixels, the smaller the aperture ratio and the darker the display becomes, and the above-mentioned stripes due to the light-shielded portions of the black matrix become conspicuous, resulting in a problem that the image quality is significantly reduced.

In order to solve the problem associated with such a decrease in the aperture ratio, it has been considered to provide a microlens to enlarge the light emitted from each pixel electrode of the display panel to the size of a pixel. For example, Japanese Patent Application Laid-Open No. 64-41515 discloses an example in which a telecentric optical system for expanding and converting a parallel light beam into a parallel light beam and a meniscus microlens are used to realize a light valve used in a projector or the like. ing. Also, JP-B 63-62
No. 748 discloses an example realized in a segment type direct-view display device.

[0007]

As described above, when performing full-color display, red, green, and blue color filters are provided for each pixel of the display panel, and color display is performed by the three-color pixel configuration. However, in a direct-view display device such as a viewfinder or a scope, since the display panel is observed close, the resolution of the observer's eyes is increased, and the red, green, and blue pixels appear to be independent. For this reason, the smoothness of the image is lacking, and the image quality is reduced. In particular, in a scope or the like used in the virtual reality system, the observer views the enlarged and displayed image, so that the image quality is significantly reduced.
It is also a serious problem in creating a pseudo space.

Further, in a direct-view display device used as a view finder of a video camera or a scope of a virtual reality system, the distance between the display panel and the eyepiece is particularly short, and the parallax in the vertical and horizontal directions of the display panel becomes large. . Therefore, when the microlenses as described above are provided, an optical shift occurs between the pitch of the microlenses and the pixel pitch of the display panel, so that light emitted from the display panel does not pass through the center of the microlens, and so-called moire fringes are generated. And the image quality is significantly reduced.

In Japanese Patent Application Laid-Open No. 64-41515, a telecentric optical system is used in consideration of this problem, and a parallel light beam is used as light incident on a display panel. However, it is also important for viewfinders and scopes to be small, so it is difficult to produce a light beam having a uniform illuminance distribution and a high degree of parallelism within a limited space. Therefore, a diffused light source using a cold-cathode tube or the like must be used, and the image quality is degraded due to the above-described moiré fringe, and the effect described in the application cannot be expected. In addition, the aforementioned Japanese Patent Publication No. 63-6
No. 2748 does not correspond to a display device in which the distance between the display panel and the eyepiece is short. Therefore, when it is used as a viewfinder or a scope, image quality is deteriorated due to the above-described moiré fringes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a direct-view display device which performs full-color display without deteriorating image quality, has no stripe pattern due to parallax, and can provide a color display with high image quality.

[0011]

According to the present invention, there are provided a plurality of transmissive display panels, a plurality of light sources for irradiating the plurality of display panels with different colored lights, and an image displayed on the plurality of display panels. synthesizing means for synthesizing optically, and the eyepiece for observing the image synthesized by said synthesizing means, or
A direct-view display device, comprising:
Multiple pixels that control light emission are arranged in a matrix
A display element, and a micro-element formed corresponding to the plurality of pixels.
A microlens, the display element
Formed on the combining means side surface of the display device.
The plane where the elements are arranged and the micro lens are formed
The distance from the plane is t, and the pixels of the display element are arrayed.
The eyepiece from the flat surface and the display element side
The distance from the virtual image of the observer at the time of
Let n be the refractive index of the substrate, and let the pixel pitch of the display element be
When P0 and the pitch of the micro lens are P1
When the pitch P1 of the micro lens is P1 = P0.
{1−t / (n · L)}.

The present invention also relates to a plurality of transmissive display panels.
And irradiating different color lights to the plurality of display panels.
Light sources, and images displayed on the plurality of display panels.
Combining means for optically combining, and the combining means
An eyepiece for observing the formed image
A display device, wherein the display panel controls incident light.
A display element in which a plurality of pixels are arranged in a matrix,
Microlenses formed corresponding to the plurality of pixels
And the light transmitted through the microlens is the eyepiece.
A field lens for converging light to the
The lens is formed on the surface of the display element on the combining means side, and
The field lens is composed of the micro lens and the combining means.
It is characterized by being arranged between.

[0013]

[0014]

[0015]

According to the present invention, the transmission type display panel is irradiated with light from a light source to display an image. Images displayed on the plurality of display panels are observed through eyepieces. The display panel includes a display element and a micro lens. In the display element, a plurality of pixels for controlling incident light are arranged in a matrix. Also, the micro lens is
A plurality of pixels of the display element are formed on the eyepiece-side surface of the display element corresponding to the plurality of pixels. The microlens enlarges light emitted from the plurality of pixel electrodes of the display element to the size of a pixel.

Therefore, the light emitted from the plurality of pixel electrodes is enlarged to the size of the pixel and connected to each other, and the stripes are eliminated and the brightness becomes uniform and the contrast becomes uniform. For this reason, the image quality is improved. Even when the display panel is observed nearby, for example, when used as a display means such as a viewfinder of a video camera or a scope of a virtual reality system, a high-definition display can be obtained.

According to the invention, the display element includes a pair of substrates and a black matrix. The pair of substrates,
It has translucency. The black matrix is arranged between a pair of substrates, and has a plurality of light shielding regions and a plurality of transmission regions. The microlens is designed to have a magnification that connects light emitted from a plurality of transmission regions to each other.

Therefore, it is possible to eliminate the stripe pattern caused by the light shielding area.

Furthermore, according to the present invention, the pitch P1 of the microlenses is P1 = P0 ｛1-t / (n ・
L)｝. Here, P0 represents the pixel pitch of the display element, t represents the distance between the plane on which the pixels of the display element are arranged and the plane on which the microlenses are formed, and n
Represents the refractive index of the substrate of the display element, and L represents the distance between the plane on which the pixels of the display element are arranged and the virtual image of the observer when looking through the eyepiece from the display element side.

Therefore, since the light emitted from the plurality of pixel electrodes is connected to each other and passes through the center of the microlens, moire fringes caused by parallax between the display element and the microlens are eliminated. For this reason, a bright color display having a uniform contrast and further improved image quality can be obtained.

According to still another aspect of the present invention, the display panel includes a display element, a micro lens, and a field lens. In the display element, a plurality of pixels for controlling incident light are arranged in a matrix. The micro lens is formed on the eyepiece-side surface of the display element corresponding to the plurality of pixels of the display element. The field lens is disposed between the microlens and the eyepiece, and a principal ray parallel to an optical axis of light transmitted through the microlens by the field lens is focused on the eyepiece.

Therefore, a high-definition display can be obtained, and the light emitted from the plurality of pixel electrodes is enlarged to the size of a pixel and connected to each other, and is bright without stripes.
In addition, the contrast becomes uniform. In addition, since only the component of the light emitted from the microlens which is close to parallel to the optical axis is observed from the eyepiece, it is necessary to use a parallel light beam as disclosed in Japanese Patent Application Laid-Open No. 35415/64. Therefore, even if a diffused light source or the like is used, it is possible to obtain an image with improved image quality without moiré fringes. Further, when a direct-view display device using liquid crystal is used, the viewing angle dependency is improved, and a display with improved image quality is obtained.

[0023]

FIG. 1 shows a display device 1 according to an embodiment of the present invention.
FIG. 2 is a side view showing a schematic configuration of a zero. The display device 10
Backlights 6R, 6G, 6B, cross dichroic prism 8, eyepiece 9, and display panel 11R, 1
1G and 11B. Display panel 11R
Includes a liquid crystal element 1R, a microlens array 5R, and a field lens 7R.
Includes a liquid crystal element 1G, a micro lens array 5G, and a field lens 7G, and the display panel 11B includes a liquid crystal element 1B, a micro lens array 5B, and a field lens 7B.

The cross dichroic prism 8, which is a combining means, transmits or reflects incident light. A display panel 11 is provided on the side surfaces 8a, 8b, 8c of the prism 8.
R, 11G, and 11B are respectively arranged. On the opposite side of the display panels 11R, 11G, 11B from the prism 8, backlights 6R, 6G, 6B, which are diffusion light sources and are realized by, for example, cold-cathode tubes that emit white light, are arranged. The backlight 6R is provided with, for example, a red color filter, and emits light in a red wavelength band from the backlight 6R. The backlight 6G is provided with, for example, a green color filter, and the backlight 6G emits light in a green wavelength band. Further, the backlight 6B is provided with, for example, a blue color filter, and the backlight emits light in a blue wavelength band.

The light emitted from the backlight 6R passes through the display panel 11R and enters the cross dichroic prism 8. The cross dichroic prism 8
This light is reflected on the side surface 8 d side of the cross dichroic prism 8. The light emitted from the backlight 6G is
The light passes through the display panel 11G and enters the cross dichroic prism 8. Cross dichroic prism 8
Transmits this light to the side surface 8 of the cross dichroic prism 8.
Transmit light to d side. The light emitted from the backlight 6B passes through the display panel 11B and enters the cross dichroic prism 8. The cross dichroic prism 8 reflects this light toward the side surface 8 d of the cross dichroic prism 8. In this way, the light incident from the side surfaces 8a, 8b, 8c of the cross dichroic prism 8 is combined and emitted from the side surface 8d. Observer 12
Observes light synthesized from the eyepiece lens 9 arranged on the side surface 8d side of the cross dichroic prism 8, that is, an image displayed in color.

FIG. 2 shows a display panel 1 of the display device 10.
It is a side view which shows 1R. In FIG. 2, hatching is drawn in the light shielding area 4a by the black matrix 4. Note that the same hatching is shown in FIGS. 3 and 6 below. The liquid crystal element 1R of the display panel 11R includes substrates 2 and 3 having a light-transmitting property, and a pixel electrode (not shown) that is regularly arranged on one of the substrates 2 and 3; Wiring electrode for supplying voltage and TFT for switching applied voltage between pixel electrode and wiring electrode
And a black matrix 4 are formed. A counter electrode is formed on the surface of the other substrate, and so-called active matrix driving is performed in the liquid crystal panel 1R. An alignment film for aligning liquid crystal molecules is formed on the surfaces of the substrates 2 and 3, and a liquid crystal is interposed between the substrates 2 and 3.

The black matrix 4 is a member for eliminating non-uniformity of display caused by poor alignment of liquid crystal molecules existing on a wiring electrode or a switching element region for supplying a voltage to a pixel electrode, and has passed through the region. Block light. Therefore, in the black matrix 4, a plurality of light shielding regions 4a and a plurality of transmission regions 4b indicated by oblique lines are formed. The liquid crystal element 1R thus configured
Has a diagonal length of, for example, 2 inches (vertical length 30.5 mm, horizontal length 40.6 mm). The pixel pitch P0 is, for example, 48 μm in the vertical direction and 48 μm in the horizontal direction. The pixel opening, that is, the transmission region 4b, is, for example, 24 μm in the vertical direction and 36 μm in the horizontal direction.
It is said.

A backlight 6R is arranged on the surface 2a side of the substrate 2 of the liquid crystal element 1R. Further, a microlens array 5R is formed on the surface 3a of the substrate 3 of the liquid crystal element 1R. The microlens array 5R is formed corresponding to a plurality of pixels, and includes a plurality of microlenses 5a realized by plano microlenses. The microlens 5a is designed to have an enlargement ratio such that the lights emitted from the plurality of transmission areas 4b are connected to each other, and can eliminate the stripe pattern generated by the light-shielding area 4a. A field lens 7R is arranged on the surface 5b side of the micro lens array 5R. The field lens 7R is designed such that a principal ray of light passing through the microlens array 5R and parallel to the optical axis is focused on the eyepiece 9.

Although the illustration of the cross dichroic prism 8 is omitted in FIG.
A cross dichroic prism 8 shown in FIG. 1 is arranged between R and the eyepiece 9.

The light emitted from the backlight 6R enters the liquid crystal element 1R. Of the light that has entered the liquid crystal element 1R, the light that has entered the plurality of light blocking regions 4a is blocked.
On the other hand, the light incident on the plurality of transmission regions 4b is
It is controlled according to the alignment state of the liquid crystal molecules existing between them. Light emitted from the transmission region 4b of the liquid crystal element 1R is enlarged by the micro lens 5a, and the light is connected to each other. The light that has passed through the microlens array 5R is refracted by the field lens 7R such that only light parallel to the optical axis of the light enters the eyepiece 9.
Since the observer 12 observes the light through the eyepiece 9, of the light emitted from the microlens array 5 </ b> R, the light that can pass through the eyepiece 9, that is, is nearly parallel to the optical axis. Observe only the component light.

That is, the observer 12 observes one point of the transmission area 4b of the liquid crystal element 1R in an enlarged manner to the size of each microlens 5a. This one observed point may be any part of the transmission region 4b. Therefore, the light emitted from the microlens array 5R is distributed within a certain angle range with respect to the optical axis.

FIG. 3 is a diagram showing the spread angle θ of the light emitted from the microlens array 5R. The thickness t of the substrate 3
Is 600 μm and the refractive index n is 1.52, the focal length of the microlens 5 a is 395 μm (= 600 /
1.52), and the divergence angle θ of the pixel opening is geometrically 2.3 ° in the vertical direction (= 2 · tan ⁻¹ ｛(24/2)).
/ 600 °) and the lateral direction is 3.4 ° (= 2 · tan)
^-1 {(36/2) / 600}). Further, the distance L1 between the position of the virtual image 12a of the observer 12 seen when looking through the eyepiece 9 from the liquid crystal element 1R side and the plane on which the pixels of the liquid crystal element 1R are arranged is 110 mm, and the eyepiece 9 is The distance L2 from the observer 12 is set to 20 mm,
Assuming that the distance L3 between the plane on which the pixels of the liquid crystal element 1R are arranged and the eyepiece 9 is 80 mm, the size of the eye ring at the eye point of the viewfinder is 2.9 mm geometrically (= ｛20 / (110-80)｝ ・ 2
* 110 * tan (2.3 / 2)) x 4.4 mm (=
{20 / (110-80)} ・ 2 ・ 110 ・ tan
(3.4 / 2)). The eye ring is an image of a small bright circle seen behind the eyepiece when viewed away from the eyepiece, that is, an exit pupil,
This position of the exit pupil is called an eye point. The size of the eye ring is a value that can be sufficiently used as a view finder.

Although the above description is for the display panel 11R, the display panels 11G and 11B are similarly configured and displayed. in this way,
According to the present embodiment, the display panels 11R, 11G, 11B
, The microlens arrays 5R, 5G, 5B, and the field lenses 7R, 7G, in which the principal ray parallel to the optical axis of the light emitted from the microlens arrays 5R, 5G, 5B converges on the eyepiece 9. 7B. Therefore, the stripe pattern generated by the light-shielding region 4a can be eliminated, and the display can be made bright and the contrast can be made uniform. Also, a backlight 6 that is a diffusion light source
Even if R, 6G, and 6B are used, the liquid crystal elements 1R, 1G, and 1B
And moire fringes caused by parallax between the microlens arrays 5R, 5G, and 5B can be eliminated, and the image quality can be improved. Furthermore, the observer 12 enlarges and observes one point of the transmission area 4b via the eyepiece 9, so that the aperture ratio is substantially improved and a bright display can be obtained.

Also, since different color lights from the backlights 6R, 6G and 6B are combined by the cross dichroic prism 8 to perform color display, each pixel of the display panel is provided with red, green and blue color filters. As described above, the pixels of each color light are not observed independently. Therefore, it can be used as a view finder of a video camera and the like, and can be suitably used because a high-definition color display can be obtained even in an enlarged display such as a scope of a virtual reality system.

The field lens 7 of the display device 10
If the R, 7G, 7B and the eyepiece 9 are designed according to the purpose, the observer 12 can observe a virtual image of an arbitrary size at an arbitrary place. For example, assuming that the focal length f of the eyepiece 9 is 60 mm, as shown in FIG. 4, the real image A1 is a lens imaging formula, that is, (1 / d1) +
By (1 / d2) = 1 / f, a virtual image A2 having a size approximately three times as large as the real image A1 is observed at a position where the distance d2 from the eyepiece lens 9 is 240 mm. Here, d1 represents the distance between the eyepiece 9 and the real image A1. If the field lenses 7R, 7G, 7B and the eyepiece 9 are designed such that the distance d2 from the eyepiece 9 to the virtual image A2 is 1 m, the virtual image A2 having a size about 12.5 times can be observed. It can be suitably used as a scope of the virtual reality system.

By preparing two sets of the display device 10 according to the present invention and using them with a compound eye, it is possible to realize a stereoscopic view with depth and depth in the virtual reality system as described above. .

FIG. 5 is a side view showing a schematic configuration of a display device 22 according to another embodiment of the present invention. Display device 22
Is configured in substantially the same manner as the display device 10 of the above-described embodiment, but the display panel 23R is
R and a microlens array 21R, and the display panel 23G has a liquid crystal element 1G and a microlens array 21G.
And the display panel 23B comprises the liquid crystal element 1B and the microlens array 21B. Microlens arrays 21R, 21G, 21B of the present embodiment
Is obtained by correcting the pitch P1 of the microlenses 21a.

FIG. 6 shows the display panel 2 of the display device 22.
It is a side view which shows 3R. The liquid crystal element 1R of the display panel 23R is formed by interposing liquid crystal between substrates 2 and 3 on which pixel electrodes and switching elements for performing active matrix driving are formed, as in the above-described embodiment. A black matrix 4 is formed between the substrates. A backlight 6R as a diffusion light source is disposed on the surface 2a side of the substrate 2 of the liquid crystal element 1R, and a microlens array 21R is formed on the surface 3a of the substrate 3 of the liquid crystal element 1R. Micro lens array 21R
Consists of a plurality of microlenses 21a formed corresponding to a plurality of pixels and realized by plano microlenses. An eyepiece 9 is arranged on the viewer 12 side of the microlens array 21R. The microlenses 21a of the microlens array 21R are subjected to a pitch correction described later, and are designed to have an enlargement ratio such that the lights emitted from the plurality of transmission regions 4b are connected to each other.

Although FIG. 6 does not show the cross dichroic prism 8 as in FIG.
The cross dichroic prism 8 shown in FIG. 5 is arranged between the display panel 23R and the eyepiece 9.

The pixel pitch P0 of the liquid crystal element 1R is 48 μm
The thickness t of the substrate 3 is set to 600 μm, the refractive index n of the substrate 3 is set to 1.52, and the eyepiece 9 is placed from the liquid crystal element 1R side.
Assuming that the distance L1 between the position of the virtual image 12a of the observer 12 seen when looking into the camera and the plane on which the pixels of the liquid crystal element 1R are arranged is 110 mm, the micro lens 21a
Is P1 = P0 · {1-t / (n · L)}
That is, the pitch P1 of the micro lenses 21a is 47.8 μm. Therefore, the light emitted from the liquid crystal element 1R passes through the center of the micro lens 21a.

The display panels 23G and 23B have the same configuration as that of the display panel 23R, and are provided with microlens arrays 21G and 21B whose pitch has been corrected. As described above, according to the present embodiment, the display panel 23
R, 23G and 23B have a micro lens array 21
R, 21G and 21B are provided. The pitch of the microlenses 21a of the microlens arrays 21R, 21G, 21B is corrected so that the light emitted from the liquid crystal elements 1R, 1G, 1B passes through the center of the microlenses 21a. Therefore, the stripe pattern generated by the light-shielding region 4a is eliminated, and the display can be made bright and the contrast can be made uniform. A backlight 6 which is a diffusion light source
Even if R, 6G, 6B are used, the liquid crystal elements 1R, 1G, 1B
Moire fringes caused by parallax between the image and the microlens arrays 21R, 21G, 21B can be eliminated, and the image quality can be improved.

Also, the display device 22 of this embodiment performs color display by combining different color lights from the backlights 6R, 6G, and 6B with the cross dichroic prism 8 in the same manner as the display device 10. A color display is obtained. Therefore, it is suitably used as a viewfinder of a video camera or a scope of a virtual reality system.

The display device 22 according to the present invention, like the display device 10, is provided with two sets of display devices 22 and is used with a compound eye. Can be realized.

In this embodiment, the micro lenses 5a,
Although an example in which a plano microlens is used as 21a has been described, the use of a meniscus microlens, a biconvex microlens, or the like that satisfies the conditions in each embodiment also falls within the scope of the present invention.

In this embodiment, the liquid crystal elements 1R, 1G,
Although an example using 1B has been described, an example using a display element using an electrochromic panel, PLZT, or the like also belongs to the scope of the present invention.

Further, in this embodiment, the backlight 6R,
6G and 6B are diffusion light sources, and the example in which red, green, and blue color filters are provided in a cold cathode tube that emits white light has been described. However, a fluorescent lamp or an electroluminescent lamp that emits red, green, or blue color light is described. An example using a self-light emitting element such as a cent panel is also included in the scope of the present invention.

Further, in the present embodiment, an example in which the cross dichroic prism 8 is used as the synthesizing means has been described, but an example in which other synthesizing means such as a cross dichroic mirror is used also falls within the scope of the present invention.

[0048]

As described above, according to the present invention, a display panel includes a display element and a microlens. Since the microlens enlarges light emitted from the plurality of pixel electrodes of the display element to the size of a pixel, the emitted lights are connected to each other,
Stripes disappear. Therefore, a bright and uniform display is obtained, and the image quality is improved. High-definition display can be obtained even when the display panel is used as a display means for observing the display panel nearby.

According to the present invention, the display element includes a pair of substrates and a black matrix. The microlenses are designed with a magnification that connects light emitted from a plurality of transmission regions of the black matrix to each other.
Therefore, it is possible to eliminate the stripe pattern generated by the light shielding area.

Further, according to the present invention, the pitch P1 of the microlenses is adjusted, and the light emitted from the plurality of pixel electrodes of the display element passes through the center of the microlens. Therefore, moire fringes caused by the parallax of the distance between the display element and the microlens are eliminated, and the image quality is improved.

Further, according to the present invention, a display panel includes a display element, a micro lens, and a field lens. The field lens is designed such that a principal ray parallel to the optical axis of the light transmitted through the microlens is focused on the eyepiece. Therefore, the light emitted from the plurality of pixel electrodes of the display element is enlarged to the size of the pixel and connected to each other, and the display becomes bright and the contrast becomes uniform. Further, even when a diffused light source is used, moire fringes caused by parallax are eliminated. Therefore, a display with improved image quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a display device 10 according to one embodiment of the present invention.

FIG. 2 is a side view showing a display panel 11R of the display device 10.

FIG. 3 is a diagram showing a spread angle θ of light emitted from a microlens array 5R.

FIG. 4 is a diagram showing a real image A1 and a virtual image A2.

FIG. 5 is a side view showing a schematic configuration of a display device 22 according to another embodiment of the present invention.

FIG. 6 is a side view showing a display panel 23R of the display device 22.

[Explanation of symbols]

1R, 1G, 1B Liquid crystal element 2, 3 substrate 4 Black matrix 5R, 5G, 5B, 21R, 21G, 21B Micro lens array 5a, 21a Micro lens 6R, 6G, 6B Backlight 7R, 7G, 7B Field lens 8 Cross dichroic Prism 9 Eyepiece 10, 22 Display 11R, 11G, 11B, 23R, 23G, 23B Display panel

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 27/02 G02F 1/1335

Claims (2)

(57) [Claims] 1. A plurality of transmissive display panels, a plurality of light sources for irradiating the plurality of display panels with different colored lights, and a combining unit for optically combining images displayed on the plurality of display panels. An eyepiece for observing an image synthesized by the synthesizing means , wherein the display panel includes a plurality of pixels for controlling incident light.
A plurality of pixels arranged in a matrix and a plurality of pixels.
And a correspondingly formed microlens.
The lens is not formed on the surface of the display element on the combining means side.
And the plane on which the pixels of the display element are arranged
The distance from the plane on which the lens is formed is t,
From the plane on which the pixels of the element are arranged and from the display element side
Let L be the distance from the observer's virtual image when looking through the eyepiece.
The refractive index of the substrate of the display element is n, and the display element is
The pixel pitch of the child is P0, and the pitch of the micro lens is
When the pitch is P1, the pitch P1 of the micro lens is P1 = P0０1
−t / (n · L)｝
apparatus. 2. A plurality of transmissive display panels, and a plurality of display panels irradiating different color lights to the plurality of display panels.
Optically combine a light source and images displayed on the plurality of display panels
And an eyepiece for observing the image synthesized by the synthesizing means.
A lens and direct view display device having the display panel, a plurality of pixels for controlling the incident light Mato
A plurality of pixels arranged in a matrix and a plurality of pixels.
A correspondingly formed microlens,
Field where the light transmitted through the eyepiece is focused on the eyepiece
A lens, wherein the microlens is a display element.
The field lens is formed on the combining means side surface of
Disposed between the microlens and the combining means
A direct-view display device.