JP2000047137A - Reflection type display element and projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the use efficiency and color purity of light by shifting the optical axis of luminous flux made incident on each pixel toward the center of a unit optical element for light convergence. SOLUTION: A 1st microlens array 25 converges pieces of luminous flux of colors corresponding to respective pixels 22R, 22G and 22B of a reflecting electrode 22. Then a 2nd microlens array 27 slants the optical axes of respective pieces of luminous flux made incident obliquely on the pixel parts 22R and 22B on both the side so that the main light beams of the pieces of luminous flux are made incident almost vertically on the reflecting surfaces of the corresponding pixel parts 22R and 22B. At this time, the 2nd microlens array 27 sets the angle of incidence of the incident luminous flux so that the arrival position of the main light beam of the obliquely incident luminous flux is C1 shifted from the pixel center C0 to the center of the microlens array 27a by 8. Consequently, the symmetry of pieces of luminous flux made incident on respective pixels with the main light beams increases and the rate that luminous flux after being reflected at the pixel parts enters the original microlenses increases, so the light use efficiency and color purity can be improved on the whole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-panel reflective display element suitable for color display and a projection display apparatus using the reflective display element.

[0002]

2. Description of the Related Art Conventionally, a projection type display apparatus of this type includes a light source for generating readout light, spectral means for separating light emitted from the light source into three primary color lights, and reflecting the light at different angles. A polarization separation unit that polarization-separates the three primary color lights, and a spatial light modulation element that modulates the light separated by the polarization separation unit with a light modulation layer, and reads out the read light modulated by the spatial light modulation element. This is to magnify and project the image on a screen via polarization separation means.

JP-A-8-240868 discloses a means between a microlens array and a pixel electrode (light modulation layer) for deflecting the light emitted from the microlens array in a direction substantially normal to the pixel electrode surface. are doing. This spatial light modulator uses a pixel array having a delta array (see FIG. 2), and the principal ray of each color light is directed toward the center of each pixel, and is collected symmetrically with respect to the principal ray. (See FIG. 3 etc.).

[0004]

However, according to the invention disclosed in Japanese Patent Application Laid-Open No. Hei 8-240868, the pixels are arranged in a delta array, and each microlens is more sufficiently than the corresponding R, G, B pixel set. When used in a liquid crystal panel having a square lattice and stripe arrangement, which is desirable for data display, the size of each microlens and the corresponding pixel set of R, G, and B are substantially equal. Therefore, when each principal ray is directed to the center of each pixel, the ratio of the luminous flux from the center of the microlens becomes larger,
The asymmetric portion results in mixed color light. Therefore, of the light beams reflected by the pixel electrodes, the light beams that are not symmetrical with respect to the principal ray before reflection do not return to the original microlenses and become mixed color light. As a result, there is a problem that the light use efficiency is reduced and the color purity is reduced by the amount of the mixed color light.

This phenomenon becomes more conspicuous as the size of the pixel becomes smaller. In particular, since the color mixture due to the parallel light beam having a higher weight in the light beam emitted from the light source increases, it is disadvantageous for high definition.

An object of the present invention is to provide a small and high-definition reflective display device and a projection display device which improve light use efficiency and color purity.

[0007]

According to a first aspect of the present invention, there is provided a reflective display element for reflecting and modulating light beams separated into primary color light, wherein the light beams of the primary color light are respectively modulated. A pixel set having a plurality of reflective pixel units, a light-collecting optical element having a unit element having a size substantially including the pixel set, and condensing each of the split light beams to each of the pixel units; A reflection type display element, comprising: an optical axis changing optical element that changes an optical axis of a light beam passing through the condensing optical element to a center side of a unit element of the condensing optical element. is there. According to the first aspect, since the optical axis of the light beam incident on each pixel is changed to the center side of the unit element of the condensing optical element by the optical axis changing optical element,
The symmetry of the light entering each pixel portion is improved, the ratio of the light flux reflected by each pixel portion to the original light-collecting optical element is increased, and the light use efficiency and color purity are improved.

According to a second aspect of the present invention, in the reflective display element of the first aspect, the optical axis changing optical element translates and / or tilts an optical axis of a light beam incident on each of the pixel portions. This is a reflective display element. According to the second aspect, the optical axis of the light beam incident on each pixel portion can be easily changed.

According to a third aspect of the present invention, in the reflective display device according to the first or second aspect, each of the pixel portions is a stripe-shaped pixel portion divided into three squares, and the optical element for changing the optical axis is The reflective display device is characterized in that the optical axis of the light beam incident on the pixel units on both sides is changed to the central pixel unit side. According to the third aspect, the luminous flux incident on the pixel units on both sides is changed toward the center, so that the symmetry of the light incident on each pixel unit is improved.

A fourth aspect of the present invention is the reflective display element according to the third aspect of the present invention, wherein the central pixel portion is smaller than the pixel portions on both sides. According to the fourth aspect, since the central pixel portion is made smaller, the reflection area is reduced, so that color mixture of obliquely incident light beams can be prevented without significantly reducing vertically incident light beams.

According to a fifth aspect of the present invention, in the reflection type display device according to any one of the first to fourth aspects, the condensing optical element and the optical axis changing optical element each include a microlens. And / or a cylindrical display. According to the fifth aspect, the light use efficiency is improved by using the microlens. When a cylindrical lens is used,
Since the matching with the pixel set is achieved and the effective area is increased, the light use efficiency is further improved.

A sixth aspect of the present invention is the reflective display device according to any one of the first to fourth aspects, wherein the condensing optical element and / or the optical axis changing optical element has a unit element. This is a reflective display element, which is a toric lens. According to the sixth aspect, since the toric lens is used, matching with the pixel set is achieved, and the effective area is increased, so that the light use efficiency is further improved.

According to a seventh aspect of the present invention, in the reflective display device according to any one of the first to sixth aspects, an inner peripheral portion of the central pixel portion adjacent to the pixel portions on both sides is provided.
A reflective display element including a light-blocking portion that blocks incident light and / or reflected light. According to the seventh aspect, by reducing the reflection area of the central pixel portion, it is possible to prevent color mixing due to oblique incidence by the light shielding portion without significantly lowering the utilization efficiency of the vertically incident light beam.

According to an eighth invention, in the reflective display device according to the fifth, sixth or seventh invention, the light-collecting optical element and / or
Alternatively, in the optical element for changing the optical axis, the unit element is a cylindrical lens and / or a toric lens,
A light-shielding portion for intercepting incident light and / or reflected light is provided at an inner part of an outer edge of each of the pixel portions, which is substantially orthogonal to a longitudinal direction of the cylindrical lens or a direction in which the curvature of the toric lens is small. It is a reflective display element. According to the eighth aspect, the light collection rate in the direction orthogonal to the spectral direction and the color purity associated therewith are improved.

According to a ninth aspect of the present invention, there is provided a light source for generating readout light, spectral means for spectrally splitting light emitted from the light source into primary color light, and light arranged and incident on the light incident side or emission side of the spectral means. A polarization separation unit for polarizing and separating light at different angles, a reflective display element according to any one of the first to eighth inventions for modulating the light separated by the polarization separation unit, and the spatial light modulation panel. And a projection unit that projects the readout light that has been modulated and passed through the polarization separation unit. According to the ninth aspect, since the reflective display element having no light mixing and having high light use efficiency is used, the screen is bright and clear.

According to a tenth aspect, in the projection display apparatus according to the ninth aspect, the spectroscopic means causes a vertical light beam to enter the central pixel portion, and an oblique light beam to the pixel portions on both sides. This is a projection display device characterized by being incident. According to the tenth aspect, when the light is obliquely incident on the pixel portions on both sides, color mixing can be effectively prevented.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in more detail.

(First Embodiment of Projection Display Apparatus) FIG.
FIG. 1 is a diagram showing an overall configuration of a projection display device according to a first embodiment of the present invention.

The projection display device 10 according to the first embodiment includes a light source 11, a dichroic mirror 12, a polarization beam splitter 13, a reflection type LCD panel 20, and a projection lens 14, and reads out reading light on a screen 15. This is a device for enlarging and projecting.

The light source 11 is for generating readout light, and the readout light is incident on the dichroic mirror 12 as a substantially parallel light beam by a reflecting mirror on the back surface.

Dichroic mirror (spectral means) 12
Are three dichroic mirrors 12R, 12G, and 12B that selectively reflect or transmit red light, green light, and blue light.
It has. For example, dichroic mirror 12R
Is a mirror that reflects red light and transmits green light and blue light. The dichroic mirror 12G is a mirror for further separating the green light and the blue light transmitted through the dichroic mirror 12R, and reflects the green light and transmits the blue light. The dichroic mirror 12B is a mirror that reflects the blue light transmitted through the dichroic mirror 12G. Each dichroic mirror 12R, 12G, 12B
Are arranged at a predetermined angle from each other, and the reflected light enters the polarizing beam splitter 13 at different angles.

Polarizing beam splitter (polarization separating means) 1
Numeral 3 indicates that the separated S-polarized light components of red light, green light and blue light are respectively reflected by the polarization separation surface 13a at the above-mentioned predetermined angle, and are incident on a reflective LCD panel 20, which will be described later. This is for transmitting the P-polarized light component modulated by the LCD panel 20.

The projection lens 14 is an optical system for projecting the light from the polarization beam splitter 13 onto a screen 15 in an enlarged manner.

(First Embodiment of Reflective LCD Panel) FIG. 2 is a diagram showing a first embodiment of a reflective LCD panel according to the present invention.

The reflection type LCD panel 20 includes an element substrate 21, a reflection electrode 22, a liquid crystal layer 23, and a counter substrate 24.
A first microlens array 25, an adhesive layer 26,
A second microlens array 27 and an adhesive layer 28 are provided.

The element substrate 21 is a substrate on which a switching element (not shown) for supplying a drive signal to each of the pixel portions 22R, 22G, 22B of the reflection electrode 22 is formed.
The liquid crystal layer 23 is disposed between the reflective electrode 22 and the transparent counter substrate 24, and the driving voltage applied between the reflective electrode 22 and a counter electrode (not shown) provided on the counter substrate 24. Driven by voltage.

The first microlens array (light collecting optical element) 25 has a plurality of microlenses 25a formed on a base portion 25b, and transmits a light beam from the polarizing beam splitter 13 in FIG. This is an optical element for condensing light on 22B. First micro lens array 25
Is the second microlens array 2 by the adhesive layer 26.
7 is adhered.

In the second micro lens array 27 (optical axis changing optical element), a plurality of micro lenses 27a are formed on a base 27b, and the first micro lens array 25 is formed.
This is an optical element for changing the optical axis of a light beam from the optical system.
The second microlens array 27 is adhered to the counter substrate 24 by an adhesive layer 28. As shown in the front view of FIG. 2B, each of the microlenses 25a and 27a is a spherical lens having a circular outer shape, and the diameter of the unit element is the pixel group of the pixel units 22R, 22G, and 22B. Is substantially the same as the pitch. Further, the adhesive layers 26 and 28
Are set to be smaller than the refractive indexes of the first and second microlens arrays 25 and 27, thereby functioning as lenses.

In the reflection type LCD panel 20 of the first embodiment, the first microlens array 25 condenses a light beam of a corresponding color on each of the pixel portions 22R, 22G, 22B of the reflection electrode 22. Then, the second micro lens array 27
Are tilted so that the principal ray of the light beam obliquely incident on the pixel units 22R and 22B on both sides enters the reflection surface of the corresponding pixel unit 22R and 22B substantially perpendicularly. Let it. At this time, the second microlens array 27 is incident so that the position where the principal ray of the obliquely incident light flux reaches C1 which is shifted to the center side of the microlens 27a by δ from the pixel center C0. The angle of incidence of the light beam is set, and the shape of the micro lens 27a is designed.

As described above, according to the first embodiment, the symmetry of the light beam entering each pixel portion with respect to the principal ray is increased, and the light beam reflected by the pixel portion is reflected by the original micro lens. As a result, the light use efficiency and the color purity can be improved as a whole.

Further, by improving the light use efficiency and the color purity, a reflection type liquid crystal panel can be used for a single-panel projection display device. Further, by using the reflection type liquid crystal panel, a small size and high definition can be realized.

(Second Embodiment of Reflective LCD Panel) FIG. 3 is a view showing a second embodiment of the reflective LCD panel according to the present invention.

In each of the embodiments described below, portions having the same functions as those in the first embodiment are denoted by the same reference numerals at the end, and duplicate description will be omitted as appropriate.

The reflection type LCD panel 20 of the first embodiment
As shown in FIG. 3A, for example, the principal ray is made to enter the pixel section 22R substantially perpendicularly. As a result, the upper and lower rays have a substantially symmetrical relationship with the principal ray.

On the other hand, the reflection type LC of the second embodiment
In the D panel 30, as shown in FIG. 3B, for example, the principal ray is incident on the pixel portion 32R at an angle, but the upper and lower directions are perpendicular to the normal line N of the pixel portion 32R. The rays are almost symmetric.

In this case, the second microlens array 37 may refract light rays so as to have the above-mentioned symmetric relationship. Since the first embodiment is a special case of the second embodiment, in addition to the effects of the first embodiment, the second embodiment has an advantage that the degree of freedom in design is increased.

(Third Embodiment of Reflective LCD Panel) FIG. 4 is a view showing a third embodiment of the reflective LCD panel according to the present invention.

As shown in FIG. 4A, the red light LR (or blue light LB) spreads the light flux LR-1 (or LB-) due to the lens aberration, diffraction, parallelism of the incident light, and the like.
Have 1). In contrast, the central green light LG
Has a smaller luminous flux spread LG-1, because the aberration and the like are smaller than those on both sides. For this reason, color mixing of the vertically incident pixel portion 42G increases.

Therefore, the reflection type LCD panel 40 of the third embodiment is provided with a light shielding portion 42BS for shielding incident light or reflected light in addition to the configuration of the first embodiment. The reflection type LCD panel 40 includes the respective pixel units 42R, 42
The pixel pitch of G, 42B is constant, and the light shielding portion 42BS
Are provided inside both edges of the central pixel portion 42G [upper and lower sides in FIG. 4A]. Then, the red light LR or the blue light LB on both sides is spread by the luminous flux LR-1, L.
Due to B-1, even if the light enters the central pixel portion 42G, the light is shielded by the light shielding portion 42BS.

According to the third embodiment, the reflection surface of the vertically incident pixel portion 42G is shielded from light by providing the light shielding portion 42BS, and color mixture due to oblique incident light can be prevented at that portion.
In this case, since the light-collecting property of the light beam to the vertically incident pixel portion 42G is originally high, by reducing the reflection area of the vertically incident pixel portion 42G, the efficiency of the vertically incident light beam is not reduced much. Color mixture of obliquely incident light beams can be prevented, and light use efficiency and color purity can be increased.

(Fourth Embodiment of Reflective LCD Panel) FIG. 5 is a view showing a fourth embodiment of a reflective LCD panel according to the present invention.

The reflection type LCD panel 40 of the third embodiment
Has a constant pixel pitch in each of the pixel units 42R, 42G, and 42B.
Are the pitches PR, P of the pixel units 52R, 52G, 52B.
G and PB are different, and PG <PR = PB. That is, the spread of the light flux LR-1, LG-1, LB-
1, the pitches PR, PG, and PB are changed.

According to the fourth embodiment, the color mixture due to obliquely incident light is reduced by reducing the size of the vertically incident pixel portion 52G (or increasing the size of the adjacent pixel portions 52R and 52B) as in the third embodiment. This can be prevented and the light can be turned into useful light.

(Fifth Embodiment of Reflective LCD Panel) FIG. 6 (a) is a perspective view of a fifth embodiment of a reflective LCD panel according to the present invention as viewed from below. Note that, for simplicity, the light-collecting optical element is omitted.

The reflection type LCD panel 60A of the fifth embodiment
As shown in FIG. 6A, a first cylindrical lens sheet (not shown) in which a number of cylindrical lenses (lenticular lenses) 67a are arranged in parallel as an optical element for condensing light and an optical element for changing the optical axis, In this case, the second cylindrical lens sheet 67 is used.

According to the fifth embodiment, a rectangular cylindrical lens is used in place of a circular microlens. Therefore, matching with the rectangular shape of a pixel set is achieved, and the effective area is increased. Thus, the light use efficiency can be further improved.

FIG. 6B shows a reflection type LCD according to the present invention.
FIG. 13 is a perspective view of a modification of the fifth embodiment of the panel as viewed from below, and the light-collecting optical element is omitted as in FIG.

When a cylindrical lens is used, the light collection rate in the direction orthogonal to the spectral direction decreases, and in consideration of the parallelism of the light source, color mixing in the direction may increase. Therefore, the reflective LCD panel 60
4B, in addition to the light-shielding portions 62BS provided at both ends of the pixel portion 62G as in FIG. 4, the light-shielding portion B is substantially orthogonal to the longitudinal direction of the cylindrical lens 67a, A section 62BS-1 is provided.

According to this embodiment, color mixing can be prevented by shielding light so as to reduce the area of the pixel portion in a direction orthogonal to the spectral direction.

(Sixth Embodiment of Reflective LCD Panel) FIG. 7A is a perspective view showing a sixth embodiment of the reflective LCD panel according to the present invention. Note that, for simplicity, the light-collecting optical element is omitted.

The reflection type LCD panel 70A of the sixth embodiment
As shown in FIG. 7A, a toric lens 7 is used as a unit element of a condensing optical element and an optical axis changing optical element.
7a. The toric lens 77a is
This is for improving the light collection rate in the direction orthogonal to the reduced spectral direction in the cylindrical lens of the fifth embodiment, and has a curvature smaller than the spectral direction curvature in the direction orthogonal to the spectral direction.

According to the sixth embodiment, since a rectangular toric lens is used instead of a circular microlens, matching with the rectangular shape of the pixel set is achieved, and the effective area thereof is increased. Thus, the light use efficiency can be further improved. Further, the light collection efficiency in the direction orthogonal to the spectral direction is also improved, so that the light use efficiency is further improved, and color mixture to adjacent pixels is reduced, thereby improving color purity.

FIG. 7B shows a reflection type LCD according to the present invention.
It is a perspective view of a modification of a 6th embodiment of a panel, and omits a condensing optical element like the above-mentioned Drawing 7 (a).

In the embodiment shown in FIG. 7A, the use of the toric lens improves the light collection rate in the direction orthogonal to the spectral direction and the color purity associated therewith. The present embodiment is to supplement the above. Reflective LCD
The panel 70B has a toric lens 77a in addition to the light shielding portions 72BS provided at both ends of the pixel portion 72G as in FIG.
Are substantially orthogonal to the direction of small curvature of
A light-shielding portion 72BS-1 is provided for each pixel group of G and 72B.

According to this embodiment, color mixing can be prevented by shielding light so as to reduce the area of the pixel portion in a direction orthogonal to the spectral direction. Further, since the color mixture is prevented by the light-shielding portion, the curvature of the toric lens can be reduced, and the lens can be easily manufactured.

(Seventh Embodiment of Reflective LCD Panel) FIG. 8A is a view showing a seventh embodiment of the reflective LCD panel according to the present invention.

The reflective LCD panel 80A of the seventh embodiment
Is used as the second microlens array 87 as the base 8
7b, a concave microlens 87a concave toward the pixel portion side
Is arranged. Therefore, the concave micro lens 8
The relationship between the refractive index of 7a and the refractive index of the adhesive layer 88 is opposite to that of the above-described embodiments.

FIG. 8B shows a reflection type LCD according to the present invention.
It is a figure showing the modification of a 7th embodiment of a panel.

In the reflection type LCD panel 80B, a convex converging microlens 85a is provided on the left side of the base portion 85b as a microlens array 85B, and a concave optical axis changing microlens 87a is integrated on the right side. It is formed in. For this reason, both microlenses can be accurately positioned.

(Eighth Embodiment of Reflective LCD Panel) FIG. 9 is a view showing an eighth embodiment of the reflective LCD panel according to the present invention.

The reflection type LCD panel 90 of the eighth embodiment
Shows an example of a delta arrangement in each pixel section.

In this case, each pixel section 92R, 92G, 9
The optical axis of the principal ray is intended to reach from the center of 2B to the center of the regular hexagonal lens element 97a.

In the case of the present embodiment, it is only necessary to make three pixel portions as one set and collect the corresponding color lights. At this time, the dichroic mirror 12 in FIG.
What is necessary is just to incline the direction of the surface normal from the paper surface.

Although detailed description has been omitted in each embodiment, an element substrate commonly used in each embodiment is as follows.
Also called an active matrix substrate, a TFT (Thin Film Transistor: TFT) is provided below each pixel portion as a switching element for supplying a drive signal to a reflective electrode.
A thin film transistor) element is formed, and glass or silicon is used as a base. When the element substrate is an active matrix substrate that is driven by applying an electric field substantially parallel to the liquid crystal layer, the counter electrode on the counter substrate is not required.

(Modifications) Various modifications and changes are possible without being limited to the above-described embodiments, and they are also within the equivalent scope of the present invention.

For example, the optical element for changing the optical axis is not limited to the one described above. For example, a hologram, a diffraction grating or a prism can be used.

The first and second micro lens arrays 25,
27 can be implemented by a combination of other optical elements as long as it functions to condense light and change the optical axis.

The relationship between the concave and convex portions of the microlens and the adhesive layer may be reversed as long as the refractive index difference between the two is satisfied.

Further, the arrangement order of the pixels may be such that pixels for red light or blue light are arranged closer to the center of the microlens.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a first embodiment of a projection display device according to the present invention.

FIG. 2 is a diagram showing a first embodiment of a reflective LCD panel according to the present invention.

FIG. 3 is a view showing a second embodiment of the reflective LCD panel according to the present invention.

FIG. 4 is a view showing a third embodiment of the reflective LCD panel according to the present invention;

FIG. 5 is a view showing a fourth embodiment of the reflective LCD panel according to the present invention.

FIG. 6 is a perspective view of a reflective LCD panel according to a fifth embodiment of the present invention as viewed from below.

FIG. 7 is a perspective view of a sixth embodiment of the reflective LCD panel according to the present invention;

FIG. 8 is a view showing a seventh embodiment of the reflective LCD panel according to the present invention.

FIG. 9 is a view showing an eighth embodiment of the reflective LCD panel according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 projection display device 11 light source 12 dichroic mirror 13 polarizing beam splitter 14 projection lens 15 screen 20 to 90 reflective LCD panel 21 to 91 element substrate 22 to 92 reflective electrode 23 to 93 liquid crystal layer 24 to 94 counter substrate 25 to 95 1 micro lens array 26 to 96 adhesive layer 27 to 97 second micro lens array 28 to 98 adhesive layer

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H091 FA05X FA10X FA14Y FA14Z FA26X FA29Y FA34Y FA41X FD03 FD06 FD24 GA01 LA03 LA11 LA15 LA16 MA07 5C060 EA01 GA01 GB01 HC04 HC10 HC20 HC21 HD01 JA00 JB06 5C094 AA08 BA12A ED11 ED14 ED15

Claims (10)

[Claims] 1. A reflection type display element that reflects and modulates a light beam split into primary color light, wherein the pixel set includes a plurality of pixel units that respectively reflect the light beam of the primary color light, and the pixel set is substantially included. A condensing optical element for condensing each of the split light beams onto each of the pixel portions; and an optical axis of the light beam that has passed through the condensing optical element. A reflection type display element, comprising: an optical axis changing optical element for changing the optical axis toward the center of a unit element of the optical element. 2. The reflective display element according to claim 1, wherein the optical axis changing optical element translates and / or tilts an optical axis of a light beam incident on each of the pixel units. Reflective display element. 3. The reflective display element according to claim 1, wherein each of the pixel units is a stripe-shaped pixel unit divided into three squares, and the optical axis changing optical element is provided on both sides. A reflective display element, wherein an optical axis of a light beam incident on a pixel portion is changed to a central pixel portion side. 4. The reflective display device according to claim 3, wherein the central pixel portion is smaller than the pixel portions on both sides. 5. The method according to claim 1, wherein:
13. The reflective display element according to claim 1, wherein the light-collecting optical element and the optical-axis changing optical element are each a microlens and / or a cylindrical lens. 6. One of claims 1 to 4
The reflective display element according to any one of claims 1 to 3, wherein the light-collecting optical element and / or the optical-axis changing optical element have a unit element as a toric lens. 7. One of claims 1 to 6
3. The reflective display element according to item 1, further comprising a light-shielding portion that shields incident light and / or reflected light at an inner portion of an outer edge of the central pixel portion adjacent to the pixel portions on both sides. Reflective display element. 8. The reflection type display device according to claim 5, wherein the optical element for condensing light and / or the optical element for changing optical axis is a unitary element including a cylindrical lens and And / or a toric lens, which is substantially orthogonal to the longitudinal direction of the cylindrical lens or the direction in which the curvature of the toric lens is small, and a light-shielding portion that shields incident light and / or reflected light at an inner portion of an outer edge of each of the pixel portions. A reflective display element comprising: 9. A light source for generating readout light, a light splitting means for splitting light emitted from the light source into primary color light, and light incident on the light incident side or light emitting side of the light splitting means and having different angles. 9. A reflection type display device according to any one of claims 1 to 8, which modulates light separated by the polarization type separation device. And a projection unit for projecting the readout light having passed through the polarization separation unit. 10. The projection display device according to claim 9, wherein the spectroscopic unit causes a vertical light beam to enter the central pixel unit, and causes an oblique light beam to enter both pixel units. A projection display device characterized by the above-mentioned.