JP2002055308A - Reflection type projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection type projector device which is compact, is few in ghost image and is excellent in contrast performance. SOLUTION: This reflection type projector device is provided with a reflection type panel 2 which reflects and modulates incident light and a projection lens 1 which enlarges the reflected light from the reflection type panel 2 and projects the same on a screen. Therein, the center position (optical axis) 1A of the projection lens and the center position 2A of the reflection type panel are relatively shifted and disposed. Further, when the part through which a vertical line of a total reflection prism (TRI prism) which is disposed between the reflection type lens 2 and the projection lens 1, on the center position 2A of the reflection type panel is made to be the central part of the said total reflection prism, the center position (optical axis) 1A of the projection lens is shifted to the light incident side of the total reflection prism more than the central part of the total reflection prism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type projector. This reflection type projector device can be widely used especially in the field of a general projection type television.

[0002]

2. Description of the Related Art DMD (Digital Micromirro
r Device) A DMD projector using a reflection type panel is introduced. The DMD has micromirrors corresponding to each pixel corresponding to the number of pixels. By changing the inclination from -10 degrees to +10 degrees, a state in which reflected light enters the projection lens and a state in which reflected light does not enter the projection lens are created. It has a configuration. The selection of -10 degrees and +10 degrees creates the ON and OFF states of each pixel of the panel.

That is, by rotating the mirror by 10 degrees, light rays incident at an angle of 20 degrees with respect to the entire surface of the reflective panel are reflected just in the normal direction of the entire reflective panel. And enters the projection lens arranged in that direction. This is the “ON beam”. on the other hand,
If the mirror is rotated -10 degrees in the opposite direction, the reflected light from the reflective panel is reflected in a direction 40 degrees away from the direction of the projection lens and cannot enter the projection lens. This is the “OFF light flux”. Thus, the ON / OFF state of the reflective panel is created.

FIG. 3 shows a state in which a light beam emitted from an illumination optical system using the DMD described above as a reflection type panel is reflected by a rear reflection mirror, which is a component of a projection type television, and reaches a screen. A conventional bending method using a rear reflection mirror will be described with reference to FIG. FIG.
, The light beam emitted from the projection lens 1 is bent by the rear reflection mirror 4 inclined at 45 degrees and reaches the screen 3. Here, in order to make the projection type television apparatus three-dimensionally compact, the rear reflection mirror 4 is arranged at a position half the projection distance a from the projection lens to the screen 3. Here, the size of the screen 3 is defined as horizontal H × vertical V
X corresponding to the depth dimension of the reflection type projector device in the bending method using the rear reflection mirror 4
From the screen 3 to the rear reflection mirror 4 as the size of the direction
A specific example of the distance from the upper end of the screen 3 to the projection lens 1 as a distance in the Y direction corresponding to a height dimension of the reflection type projector device and a distance to a far side of the projector will be described.

[0005] In FIG. 3, the optical axis of the projection lens 1 coincides with the center of the screen 3. Here, assuming that the intersection of the optical axis of the screen 3 and the optical axis of the projection lens 1 is the coordinate origin, the back reflection mirror 4 is a straight line, the light ray toward the lower end of the screen 3 is a straight line, and the light ray toward the upper end of the screen 3 is a straight line. Can be expressed by the following equation.

The straight line is a straight line passing through the coordinates (a / 2, 0) and having a slope of −1.

[0007]

Y = −X + a / 2 Similarly, the straight line is represented by coordinates (a, 0) and coordinates (0, −V /
Since it passes through 2), it becomes Equation 2.

[0008]

Y = (X−a) × V / (2a) Similarly, the straight line is represented by coordinates (a, 0) and coordinates (0, V /
Since it passes through 2), it becomes Equation 3.

[0009]

Y = − (X−a) × V / (2a) Here, the x coordinate of the intersection of Equations 1 and 2 is given by Equation 4, and
Equation 5 shows the x coordinate of the intersection of Equations 1 and 3.

[0010]

X4 = (a + V) / (2 + V / a)

[0011]

X5 = (a−V) / (2-V / a) Here, if the screen size is 50: 16: 9, H =
50 inches × 16 / √ (162 + 92) = 1107 m
m, V = 50 inches × 9 / √ (162 + 92) = 623
mm. Further, assuming that the projection distance a is 674 mm, X4 = 444 mm and X5 = 47 mm from Expressions 4 and 5.

[0012]

That is, the distance from the screen 3 to the far side of the rear reflection mirror 4 is 444 mm as the size in the X direction corresponding to the depth dimension of the reflection type projector device, and the height of the projection type projector device. As a size in the Y direction corresponding to the dimension, the distance from the upper end of the screen 3 to the projection lens 1 is 649 mm (= V / 2 + a / 2). The closest distance from the rear reflection mirror 4 to the screen 3 is 47 mm.

As described above, the approximate basic size from the projection lens 1 emitting portion to the screen 3 is 444 mm × 649 m.
m, and the emission portion of the projection lens 1 is arranged 26 mm (= 649-623) lower than the lower end of the screen 3.

Further, since the rear reflection mirror 4 is close to the screen 3 by 47 mm, a problem of a ghost image is likely to occur. The problem of the ghost image will be described with reference to FIG.

In FIG. 5, light reaching a point 1/10 of the vertical length V from the upper end of the screen 3
3 shows a reflected light beam when reflected by. A light beam that is incident more obliquely has a higher reflectance on the screen 3,
Just after the upper end of the screen 3, the light beam reflected by the screen 3 does not return to the rear reflection mirror 4. Therefore,
In this figure, a point 1/10 of the vertical length V of the screen 3 from the upper end of the screen 3 is selected for comparison with the present invention described later. In FIG. 5, a light beam that has reached a point 1/10 of the vertical length V of the screen 3 from the upper end of the screen 3 is reflected by the screen 3, and is reflected again by the rear reflection mirror 4. Further, the reflected light reaches the screen 3 again, and a ghost image is easily generated.

Next, the problem of stray light reflected inside the lens barrel, which deteriorates the contrast performance, will be described with reference to FIGS.

First, with reference to FIGS. 7 and 8, the behavior and action of each micro mirror in the DMD panel used as the reflective panel 2 will be described. In FIG. 7, reference numeral 5 denotes a micromirror, which is a diagram showing the swing angle of the micromirror 5 described in the related art and the angular relationship between the "ON light beam" and the "OFF light beam" with respect to the incident light beam. Here, the swing angle of the micro mirror 5 is ± 10 degrees. The illumination optical system is arranged so as to be incident at an inclination of 20 degrees with respect to the plane of the entire effective range of the reflective panel 2. Here, when the micromirror 5 swings by 10 degrees toward the side where the illumination light beam is received, the light beam incident at a tilt of 20 degrees is just a reflected light beam perpendicular to the plane of the entire effective area of the reflective panel 2, that is, the reflected light beam. It becomes “ON luminous flux”. Conversely, if the micromirror 5 swings 10 degrees in a direction opposite to the side where the illumination light beam is received (−10 degrees), it means that the micromirror 5 has rotated by 20 degrees by the difference, and the reflected light beam is rotated by 40 degrees at twice. I do. That is, the “OFF light flux” is reflected in the direction of 40 degrees with respect to the plane of the entire effective range of the reflective panel 2.

FIG. 8 shows the micro mirror 5 shown in FIG.
FIG. 5 is a diagram showing directions in which the swing angle (± 10 degrees) of the swing direction. FIG.
As shown in FIG. 7, the micromirror 5 has supporting members at two diagonal corners among the four corners of the mirror portion, and ± 10 degrees described with reference to FIG. Rotation occurs. That is, the rotation center of the micro mirror 5 is
Therefore, ± 10 degrees described with reference to FIG. 7 is also a phenomenon in a plane where the rotation occurs. Specifically, it is a direction rotated by 45 degrees with respect to the longitudinal direction of the entire effective range of the reflective panel 2.

Next, referring to FIGS. 9 and 10, the incident light beam, the "ON light beam" and the "O light beam" in a plane parallel to the reflective panel 2 will be described.
9 is a diagram showing a spatial positional relationship between the incident light beam, the “ON light beam”, and the “OFF light beam” in a cross section parallel to the reflective panel 2.
The horizontal axis in FIG. 9 is the longitudinal direction of the effective range of the reflective panel 2, and the vertical axis is the short direction. Within the 45 degree cross section, the incident light beam and the "ON light beam" are separated by a distance corresponding to 20 degrees, and
The “ON light beam” and the “OFF light beam” are separated by a distance corresponding to 40 degrees. Here, the size of the luminous flux is represented by a circle because the luminous flux of the illumination optical system has a spread of the F value.

FIG. 10 is a view showing the "ON light beam" reflected in the effective area (rectangle) of the reflective panel 2 in the same cross section as in FIG. The width is expanded by adding the F value to the effective range (rectangle) of the reflective panel 2. To reduce the size of the projection lens 1, it is necessary to shorten the back focus of the projection lens 1. As the back focus becomes shorter, the area where the luminous flux spreads due to the F value becomes smaller, and the size of the effective range (rectangle) of the reflective panel 2 becomes relatively larger. For example, immediately after the reflective panel 2, the spread of the luminous flux due to the F value is 0, the size of the entire luminous flux matches the size of the effective range (rectangle) of the reflective panel 2, and the “ON luminous flux”
And the “OFF luminous flux” spatially match. At this time, "O
The projection lens 1 having a size that captures “N light beams” also captures “OFF light beams”, and the contrast performance deteriorates.

Although the case immediately after the reflection type panel 2 is an extreme example, a small projection lens 1 having a short back focus is provided.
Then, it is sufficiently expected that a part of the “OFF light beam” is incident on the lens ball on the incident side of the projection lens 1. Once
Since the "OFF light beam" incident on the projection lens 1 has a large angle, it is blocked by a lens barrel or the like. However, part of the light beam blocked by the lens tube or the like is reflected and becomes stray light from the projection lens 1. The light exits and reaches the screen 3 to degrade the contrast performance.

A first object of the present invention is to provide a compact and
An object of the present invention is to provide a reflection type projector device with less ghost images.

Further, a second object of the present invention is to make use of the characteristics of a DMD type reflection type panel having excellent contrast performance.
An object of the present invention is to provide a reflection type projector device in which it is difficult to enter a lens ball on the incident side of the projection lens 1.

[0024]

In order to achieve the first object of the present invention, a reflection type projector apparatus according to the present invention is arranged such that an optical axis of a projection lens and a center position of a reflection type panel are relatively positioned. It is characterized by being shifted to. Further, the light beam passing through the optical axis of the projection lens is configured to be projected above the center position of the screen.

In order to achieve the second object of the present invention, the reflection type projector according to the present invention is arranged between the reflection type panel and the projection lens, and totally reflects the incident light. In a reflection type projector apparatus provided with a total reflection prism (TIR prism) which leads to the reflection type panel and transmits at least the reflected light of the minute mirror of the reflection type panel when in the ON state to enter the projection lens. When the portion of the total reflection prism through which a perpendicular line in the center of the reflection type panel passes is defined as the center of the total reflection prism, the optical axis of the projection lens is more than the center of the total reflection prism. This is characterized in that the prism is shifted to the light incident side of the total reflection prism. Further, the total reflection prism may be arranged in a direction rotated by 45 degrees with respect to a longitudinal direction of an effective reflection surface of the reflection type panel.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show the positional relationship between the projection lens and the reflective panel. Figure 1
1 is a projection lens, and 2 is a reflection type panel, as viewed from the optical axis direction of the projection lens 1. The configuration is such that the center position 2A of the reflective panel is shifted from the center position (optical axis) 1A of the projection lens. FIG. 2 is a perspective view of FIG. 1 and shows a state in which the center position 1A of the projection lens and the center position 2A of the reflective panel are shifted.

Next, the effect of improving compactness according to the present invention will be described with reference to FIG. 4, and the effect of improving ghost performance according to the present invention will be described with reference to FIG.

In FIG. 4, the vertical length V of the screen 3 is set to 2:
The optical axis of the projection lens 1 was shifted to a position internally divided by 3. At this time, the optical axis of the projection lens 1 is located at 2V / 5 from the upper end of the screen 3, and the size of the rear reflection mirror 4 can be reduced as shown in the figure. Hereinafter, the rear reflection mirror 4
The effect of miniaturization of the reflection type projector device due to miniaturization will be specifically described. The illumination optical system including at least the lamp, the reflector, the total reflection prism, and the reflection type panel will be described later with reference to FIGS.

Similarly to the description with reference to FIG. 3, in FIG. 4, a ray reaching the upper end of the screen 3 is defined by setting the intersection of the optical axis of the projection lens 1 and the screen 3 as a coordinate origin and the back reflection mirror 4 as a straight line. Is a straight line, and a ray reaching the lower end of the screen 4 is a straight line.
(2, 0) is a straight line having a slope of −1, and is represented by Expression 6.

[0030]

Y = −X + a / 2 Similarly, the straight line has coordinates (a, 0) and coordinates (0, −3V).
/ 5), so that Equation 7 is obtained.

[0031]

Y = (X−a) × (3V) / (5a) Similarly, the straight line is represented by coordinates (a, 0) and coordinates (0, 2V /
Since it passes through 5), it becomes Equation 8.

[0032]

Y = − (X−a) × (2V) / (5a) Here, the x coordinate of the intersection of Equations 6 and 7 is given by Equation 9, and
The x coordinate of the intersection of Equations 6 and 8 is shown in Equation 10.

[0033]

X9 = (a / 2 + 3V / 5) / (1 + 3V / (5a))

[0034]

X10 = (a / 2-2V / 5) / (1-2V)
/ (5a)) Here, as in the case of FIG.
6: 9, 50 inches, H = 1107 mm, V = 62
3 mm, and using the same projection distance a = 674 mm,
From Equations 9 and 10, X9 = 457 mm, X10 = 139
mm.

That is, the size in the X direction is 457 mm, and the size in the Y direction is 586 mm (= 2V / 5 + a / 2). The closest distance from the rear reflection mirror 4 to the screen 3 is 139 mm.

As described above, the approximate basic size from the exit portion of the projection lens 1 to the screen 3 is 457 mm × 586 m.
m, and the emission part of the projection lens 1 is 37 mm (= 623-586) more than the lower end of the screen 3.
The arrangement is raised.

Thus, the length in the X direction is X4 = 444.
mm (FIG. 3) to X9 = 457 mm (FIG. 4) while the position of the projection lens 1 is 26 mm from the lower end of the screen 3.
mm (FIG. 3), and conversely, a position 37 mm above the lower end of the screen 3 (FIG. 4). Therefore, in this way, a space for 63 mm in difference can be secured,
A reflection type projector device in which circuit boards and the like are arranged compactly has become possible.

In the above discussion, the numerical value as the effect of the compactness is described under the condition that the rear reflecting mirror 4 is arranged at a position of half the projection distance a, but if the position of the rear reflecting mirror 4 is shifted, , Becomes larger and smaller in the X and Y directions, but only changes. The only difference is whether the compaction due to the optical axis shift is prioritized in the X or Y direction.

Here, the shift of the optical axis of the projection lens 1 makes the design of the projection lens relatively strict, and it is necessary to increase the size of the projection lens 1. However, the effective area of the reflection type panel 2 is required. Since it is horizontally long, even if the optical axis is shifted in the vertical direction with respect to the reflective panel 2, the change amount of the maximum distance from the optical axis center of the projection lens 1 is small. For example, assuming that the size of the effective area is 17.66 × 9.94 mm as a 0.8-inch 16: 9 panel, the maximum height from the optical axis when there is no optical axis shift is 10.13.
mm (= √ ((17.66 × １ ／) 2+ (9.94 ×
1/2) and 2)). On the other hand, when the optical axis is shifted to a position where the vertical length is internally divided into 2: 3, the maximum height from the optical axis is 10.66 mm (= √ ((17.66 × 1/2) 2
+ (9.94 × 3/5) 2)). Therefore, even if the optical axis is shifted 2: 3 in the vertical direction, the maximum height from the optical axis only increases by + 5.2%, and the size of the projection lens 1 is also increased by about + 5.2%. Become. That is, the projection lens 1
Although the size of the projection type projector itself is somewhat large, the above-described large compactness effect can be obtained as a whole of the reflection type projector apparatus as compared with the enlargement of the projection lens 1.

It is assumed that the optical axis shift amount is 0.99.
When mm (= 9.94 × 3 / 5−9.94 × 1/2) is given in the diagonal direction of the panel, the maximum height from the optical axis is 11.12 mm (= 10.13 + 0.99). +9.
The size is increased by 8%. By the way, when the diagonal length is shifted in the diagonal direction by the internally dividing point of 2: 3,
+ 20% (= [3 / 5-1 / 2] / [1/2]), an even larger value.

On the other hand, from the screen 3 to the rear reflecting mirror 4
From X5 = 47mm (Fig. 3), X10 = 1
39 mm (FIG. 4) could be separated. As a result, FIG.
Ghost due to the light beam reaching the same position of the screen 3 as that of FIG. 6 can be prevented (FIG. 6).

Next, a description will be given of a basic arrangement advantageous for the contrast performance in order to take advantage of the characteristics of the DMD type reflective panel 2 having excellent contrast performance.

FIG. 11 shows the relationship of FIG.
It is explanatory drawing extended to the whole effective range (rectangle). FIG. 11 shows an arrangement diagram of the optical axis shift in which the projection lens center position 1A is shifted in the direction of the arrow, that is, toward the side closer to the incident light beam, based on the reflection type panel center position 2A.

The optical axis shift of the projection lens 1 can be considered in two directions with respect to the reflection type panel 2 as indicated by arrows in FIG. In FIG. 11, by setting the direction of the optical axis shift of the projection lens 1 upward, the positional relationship between the optical axis of the projection lens 1 and the “OFF light beam” can be separated.

An “OFF light beam” having an angle larger than the F value of the projection lens 1 is blocked by the projection lens 1 and cannot pass through the projection lens 1. However, in practice, a part of the light beam that has once entered the lens ball on the incident side of the projection lens 1 may be reflected by the inner surface of the lens barrel and emitted from the projection lens 1 as stray light. Since this stray light deteriorates the contrast performance, in order to realize good contrast performance, as a measure against this stray light, the “OFF light beam” is initially set to the projection lens 1.
It is important that the light does not enter. In other words, it is important to separate the optical axis of the projection lens 1 from the “OFF light flux” positional relationship.

The arrangement of the total reflection prism 6 for separating the optical axis of the projection lens 1 from the "OFF light beam" positional relationship will be described with reference to FIGS.

FIG. 12 shows a state in which an incident light beam incident on the total reflection prism 6 is reflected by the minute mirror 5 of the reflection type panel 2 in the "ON" state. The total reflection prism 6 is constituted by two prisms having a thin air layer between them. The incident light flux is totally reflected by the first prism, but the “ON light flux” reflected by the micromirror 5 changes its angle by 20 degrees, so that it passes through the first prism, and
The second prism also passes.

In FIG. 13 and FIG.
FIG. 4 is a diagram showing a relationship with an “ON beam” when an optical axis shift in a direction is given. FIG. 13 shows a projection lens 1 on the side opposite to the incident light beam.
14 is an example in which the optical axis of the projection lens 1 is shifted to the side closer to the incident light beam. When the optical axis of the input projection lens 1 is separated from the incident light beam,
The "OFF light beam" passes near the projection lens 1, and conversely,
When the optical axis of the projection lens 1 approaches the incident light beam, the “OFF light beam” passes far from the projection lens 1. Therefore, the contrast performance can be improved by giving an optical axis shift to the side where the optical axis of the projection lens 1 approaches the incident light beam from the illumination optical system to the total reflection prism 6.

In FIGS. 11 to 14, the direction of the optical axis shift of the projection lens 1 has been described. However, actually, the arrangement of the projection lens 1 and the reflection type panel 2 with respect to the screen 3 is determined so as to be advantageous in contrast performance. , The incident direction of the incident light beam, that is, the arrangement of the total reflection prism 6 is determined. However, there is no effect on the description of the relative relationship between the incident light beam and the optical axis shift of the projection lens 1.

In other words, by arranging the incident surface of the incident light beam from the illumination optical system to the total reflection prism 6 on the same side as the direction of the optical axis shift of the projection lens 1, the contrast performance can be improved.

Although the above discussion has been made with reference to the example in the 45-degree direction, the discussion on the contrast performance is not limited to the 45-degree direction. For example, a micro mirror 5
Provide support members at the top and bottom, or at two places on the left and right,
Even in the case of the reflective panel 2 rotated ± 10 degrees around the two supporting positions, the direction of the optical axis shift of the projection lens 1 (the position of the optical axis of the projection lens with respect to the center of the reflective panel) By arranging the incident surface of the incident light beam from the illumination optical system to the total reflection prism 6 on the same side as in (1), the contrast performance can be improved.

[0052]

According to the present invention, it is possible to realize a reflection type projector apparatus which is compact, has few ghost images, and is excellent in contrast performance.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an optical axis shift of a projection lens in an embodiment of the present invention.

FIG. 2 is a perspective view of an optical axis shift of the projection lens in the embodiment of the present invention.

FIG. 3 is a layout diagram showing the size of a system using a projection lens without optical axis shift.

FIG. 4 is a layout diagram showing the size of a system using a projection lens having an optical axis shift according to the present invention.

FIG. 5 is a diagram showing ghost performance in a system using a projection lens without optical axis shift.

FIG. 6 is a diagram showing ghost performance in a system using the projection lens with optical axis shift of the present invention.

FIG. 7 is a diagram showing reflection angles of “ON light flux” and “OFF light flux” by the reflective panel used in the present invention.

FIG. 8 is a diagram showing the direction of the swing angle of the reflective panel used in the present invention.

FIG. 9 is a diagram showing a relationship between an incident light beam, an “ON light beam”, and an “OFF light beam” in the reflective panel used in the present invention.

FIG. 10 is a diagram showing “ON luminous flux” from the entire effective range of the reflective panel used in the present invention.

FIG. 11 is a diagram showing a relationship between an incident light beam, an “ON light beam”, and an “OFF light beam” with respect to the entire effective range of the reflective panel used in the present invention.

FIG. 12 is a diagram showing the operation of the total reflection prism used in the present invention.

FIG. 13 is a configuration diagram in which an incident surface of an incident light beam from an illumination optical system to a total reflection prism is arranged on a side of a projection lens far from an optical axis shift direction.

FIG. 14 is a configuration diagram in which an incident surface of an incident light beam from an illumination optical system to a total reflection prism is arranged on a side closer to an optical axis shift direction of a projection lens.

[Explanation of symbols]

1. Projection lens, 2. Reflective panel, 3. Screen,
4: rear reflection mirror, 5: minute mirror, 6: total reflection prism.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/74 H04N 5/74 B (72) Inventor Hidehiro Ikeda 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Japan Stock F-term in Hitachi Media, Ltd. Digital Media System Division (Reference) 2H041 AA16 AB14 AC06 AZ01 AZ05 5C058 AA18 BA08 EA01 EA11 EA12 EA13 EA27 EA42

Claims (9)

[Claims] 1. A reflection-type projector apparatus comprising: a reflection-type panel that reflects and modulates incident light; and a projection lens that enlarges reflection light from the reflection-type panel and projects the light on a screen. A reflection type projector device wherein an optical axis of a lens and a center position of the reflection type panel are relatively shifted. 2. The reflection according to claim 1, wherein an optical axis of said projection lens and a center position of said reflection type panel are relatively shifted along a lateral direction of said reflection type panel. Type projector device. 3. A reflection type projector apparatus comprising: a reflection type panel for reflecting and modulating incident light; and a projection lens for enlarging light reflected from the reflection type panel and projecting the reflected light on a screen. A reflection type projector apparatus wherein an optical axis of a lens and a center position of the screen are relatively shifted. 4. The reflection type projector device according to claim 3, wherein an optical axis of said projection lens and a center position of said screen are relatively shifted along a vertical direction of said screen. 5. The optical axis of the projection lens and the center position of the screen are relatively shifted such that a light beam passing through the optical axis of the projection lens is projected above the center position of the screen. 4. The reflection type projector device according to claim 3, wherein: 6. A reflection type projector apparatus comprising: a reflection type panel for reflecting and modulating incident light; and a projection lens for enlarging light reflected from the reflection type panel and projecting it on a screen. The luminous flux passing through the optical axis of the lens is
A reflection type projector device wherein the light is projected above a center position of the screen. 7. A lamp for emitting light and an ON / OFF state
A reflection type panel including a plurality of micromirrors whose reflection angles of light change in a state, a projection lens whose incident surface is disposed opposite to an effective reflection surface of the reflection type panel, and the reflection type panel and the projection lens. Light from the lamp is incident, the incident light is totally reflected and guided to the reflective panel, and at least the reflected light of the micromirror of the reflective panel when in the ON state is transmitted. And a screen on which the reflected light is projected through the projection lens, wherein the optical axis of the projection lens is set to a central part of the reflection type panel. A reflection type projector apparatus, wherein the light is shifted to the light incident side of the total reflection prism. 8. A lamp for emitting light and an ON / OFF state
A reflection type panel including a plurality of micromirrors whose reflection angles of light change in a state, a projection lens whose incident surface is disposed opposite to an effective reflection surface of the reflection type panel, and the reflection type panel and the projection lens. Light from the lamp is incident, the incident light is totally reflected and guided to the reflective panel, and at least the reflected light of the micromirror of the reflective panel when in the ON state is transmitted. And a screen on which the reflected light is projected through the projection lens. A perpendicular line of the total reflection prism in a central portion of the reflection panel Is defined as the central portion of the total reflection prism, the optical axis of the projection lens is set closer to the light incident side of the total reflection prism than the central portion of the total reflection prism. A reflection type projector device characterized by shifting to a reflection type projector device. 9. The reflection type projector device according to claim 7, wherein said total reflection prism is arranged in a direction rotated by 45 degrees with respect to a longitudinal direction of an effective reflection surface of said reflection type panel. .