JP5446530B2 - Image projection device - Google Patents

Description

  The present invention relates to an image projection apparatus.

  In recent years, in the market of image projection devices known as projectors, demand for image projection devices is increasing with small size and low cost.

  As this small-sized image projection device, a light-weight, easy-to-use and high-luminance device is desired. In order to meet such demands, Patent Document 1 discloses a technique for downsizing the apparatus by using a transmission type light valve and allowing light to pass through a projection lens obliquely.

JP 2006-113469 A

  There are two types of image projection devices: one that modulates light when transmitting light through a transmissive light valve that generates an image (transmissive image projection device) and one that modulates light when reflecting light through a reflective light valve ( Reflection type image projection apparatus).

  An example of a configuration for reducing the size of a transmissive image projection apparatus is described in Patent Document 1. Patent Document 1 generally describes the following configuration. A transmissive light valve is disposed offset downward with respect to the projection lens, and the light emitted from the transmissive light valve is transmitted through the field lens to be transmitted obliquely through the projection lens (hereinafter referred to as an oblique projection optical system). By doing so, the distance between the transmissive image projection apparatus and the screen can be made shorter than the conventional configuration.

  Here, when the configuration of Patent Document 1 is applied to a reflection-type image projection device, light incident on a reflection-type light valve arranged offset downward with respect to the projection lens is modulated and emitted as reflected light. The reflected light emitted from the reflection type light valve is transmitted through the field lens, is transmitted obliquely through the projection lens, and is projected as an image on the screen disposed above. On the other hand, in the case of a general reflection type image projection apparatus, the optical path of illumination light emitted from a light source is on the same plane as the reflection type light valve, but in the case of a reflection type image projection apparatus having an oblique projection optical system, The center axis of the lens and the reflection type light valve are offset from each other. Therefore, in the case of a reflection type image projection apparatus having an oblique projection optical system having the configuration of Patent Document 1, the distance (light path length) between the light source and the reflection type light valve varies depending on the position of the pixel region of the reflection type light valve. As a result, the illumination light incident on the pixel area of the reflective light valve varies in the amount of illumination light depending on the position of the pixel area, resulting in uneven brightness. As a result, there is a problem that the luminance unevenness increases in the brightness of the reflected light projected on the screen.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image projection apparatus capable of reducing the size of an optical system and making light emitted from a light source uniformly illuminate a light valve so that the light use efficiency can be increased.

  Therefore, the present invention provides an image projection apparatus having the following configurations (1) to (4) in order to solve the above-described problems.

  (1) The light source 2, the first lens having a predetermined curvature and refracting the light emitted from the light source 2, and the first linearly polarized light of the incident light is transmitted and orthogonal to the first linearly polarized light. Polarizing illumination means 6 for reflecting the second linearly polarized light, a second lens 7 having a predetermined curvature and refracting the first linearly polarized light emitted from the polarized illumination means 6, and a second lens 7 The first linearly polarized light that is emitted is optically modulated based on a video signal from the outside, and includes a reflective light valve 5 that emits the reflected light as reflected light, and a projection lens 8 that magnifies and projects the incident light. The central axes of the lens, the polarized illumination means 6, the second lens 7, and the projection lens 8 are on the same plane, and the center of the pixel area of the reflective light valve 5 and the optical path of the light emitted from the light source 2 are on the plane. An image projecting device, wherein the image projecting device is arranged so as not to exist.

  (2) The image projection apparatus according to (1), wherein the center of the pixel area of the reflective light valve 5 and the optical path of light emitted from the light source 2 are arranged at different positions across a plane.

  (3) The image projection apparatus according to (1) or (2), wherein an optical path of light emitted from the light source 2 is parallel to a plane.

  (4) The light source 2 includes a plurality of light emitting diodes 21B, 21G, and 21R, and includes a color combining unit 4 that combines light emitted from the plurality of light emitting diodes 21B, 21G, and 21R (1). The image projection apparatus in any one of thru | or (3).

  According to the present invention, it is possible to reduce the size of the optical system and uniformly illuminate the light valve with the light emitted from the light source, thereby increasing the light utilization efficiency.

1 is a plan view of an image projection apparatus according to a first embodiment of the present invention. It is the side view seen in the direction of the arrow of the AA line of FIG. It is the side view seen in the direction of the arrow of the BB line of FIG. It is a figure which expands and shows the vicinity of the reflective light valve 5 in FIG. It is a side view of the image projection apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which expands and shows the vicinity of the reflective light valve 5 in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
An image projection apparatus according to a first embodiment of the present invention will be described.

  An image projection apparatus 1A according to an embodiment of the present invention includes a light source 2, collimating lenses 3R, 3G, and 3B, which are first lenses that emit parallel light from the light emitted from the light source 2, and collimating lenses 3R, 3R, Color combining means 4 that combines the light beams emitted from 3G and 3B to make the light intensity distribution uniform, and light that has entered the pixel region is modulated based on a drive signal supplied from the outside and reflected. Reflective light valve 5 which is a light modulating means such as a reflective liquid crystal display element and light emitted from color synthesizing means 4 are converted into linearly polarized light in the first direction, and among the light reflected from reflective light valve 5 Polarization illuminating means 6 that reflects linearly polarized light in the second direction orthogonal to the linearly polarized light in the first direction in a predetermined direction, and the linearly polarized light from the polarized illuminating means 6 to the size of the pixel area of the reflective light valve 5 Match Includes a field lens 7 is a second lens for irradiating, and a projection lens 8 is a projection means for enlarging and projecting on a screen (not shown) light emitted from the polarization illuminating device 6.

  The light source 2 is emitted from three light emitting diodes (LEDs) 21R, 21G, and 21B that emit red (R) light, green (G) light, and blue (B) light, and LEDs 21R, 21G, and 21B of the respective colors. Light pipes 22R, 22G, and 22B are provided on the optical paths of the respective color lights.

  The color synthesizing means 4 includes a first dichroic mirror 32 that synthesizes R light and G light emitted from the R light collimating lens 3R and the G light collimating lens 3G and emits the light as RG light, and a first dichroic mirror 32. And a pair of Fresnel lenses 33 and 34 provided on the optical path of the RG light emitted from.

  Further, the color synthesizing unit 4 includes a mirror 35 that bends the optical path of the B light emitted from the collimating lens 3B for the B light by 90 degrees, and a pair of Fresnel lenses 36 provided on the optical path of the B light that is bent by 90 degrees. 37 and a second dichroic mirror 38 that combines the RG light and the B light and emits them as white light.

  The polarized light illuminating means 6 uses a predetermined width of a metal wire on a transparent substrate such as glass in order to change the polarization direction of the white light emitted from the second dichroic mirror 38 to a predetermined one direction (for example, P-polarized light) linearly polarized light. Wire grid polarizing plates 6 formed at intervals can be used.

  Next, the path of light emitted from the light source 2 in the image projection apparatus 1A will be described.

  Each color light emitted from each color LED 21R, 21G, 21B is reflected a plurality of times inside the light pipes 22R, 22G, 22B, and the light intensity distribution is made uniform and emitted.

  The light beams emitted from the light pipes 22R, 22G, and 22B for the respective color lights are transmitted through the collimator lenses 3R, 3G, and 3B, so that the light beams are expanded.

  Here, the optical path of the R light emitted from the R light LED 21R and the optical path of the G light emitted from the G light LED 21G are orthogonal to each other, and are synthesized by the first dichroic mirror 32 arranged at the intersection. , And emitted as RG light.

  The RG light emitted from the first dichroic mirror 32 enters the pair of Fresnel lenses 33 and 34, is refracted by the pair of Fresnel lenses 33 and 34, and exits.

  On the other hand, the light emitted from the B light collimator lens 3B has its optical axis bent by 90 degrees by a mirror 35 provided with an inclination of 45 degrees with respect to the optical path of the B light.

  The B light whose optical axis is bent by 90 degrees by the mirror 35 enters the pair of Fresnel lenses 36 and 37, is refracted by the pair of Fresnel lenses 36 and 37, and exits.

  The RG light emitted from the Fresnel lenses 33 and 34 and the B light emitted from the Fresnel lenses 36 and 37 have optical axes orthogonal to each other and are combined by a second dichroic mirror 38 disposed at the intersection to produce white light. Inject as.

  The white light emitted from the second dichroic mirror 38 is incident on the wire grid polarizer 6 provided with an inclination of 45 degrees with respect to the optical axis of the white light. The wire grid polarizing plate 6 can transmit only the linearly polarized light (P-polarized light or S-polarized light, which will be described in the following description as P-polarized light) of the incident white light. Here, only P-polarized light is emitted from the incident white light.

  The P-polarized light emitted from the wire grid polarizing plate 6 is incident on the field lens 7, is converted into parallel light by passing through the field lens 7, and is incident on the reflective light valve 5 as P-polarized illumination light.

  The P-polarized illumination light incident on the reflective light valve 5 is light-modulated based on a drive signal supplied from the outside and reflected as reflected light including S-polarized light.

  The reflected light including S-polarized light is incident on the field lens 7 again and is transmitted therethrough, so that the luminous flux is expanded.

  The reflected light emitted from the field lens 7 is incident again on the wire grid polarizer 6 provided with an inclination of 45 degrees with respect to the optical axis of the reflected light. Of the reflected light incident on the wire grid polarizer 6, only the S-polarized light is bent 90 degrees along the optical axis due to the polarization characteristics of the wire grid polarizer 6, and is emitted in the direction of the projection lens 8 as projection light.

  The projection light emitted from the wire grid polarizer 6 enters the projection lens 8 and is enlarged and projected onto a screen (not shown) to display an image based on the drive signal.

  Here, the optical path from the LEDs 21R, 21G, and 21B to the field lens 7 can also be referred to as an illumination optical system. The optical path from the field lens 7 to the projection lens 8 that is the optical path of the reflected light emitted from the reflective light valve 5 can be called a projection optical system.

  Next, the oblique projection optical system will be described with reference to FIG. FIG. 2 is a side view of the portion of the projection optical system in FIG. 1 (the direction of the arrow along line AA in FIG. 1), and shows only the components necessary for the description.

  As shown in FIG. 2, the oblique projection optical system is provided so that the center axes 9 </ b> A of the field lens 7, the wire grid polarizing plate 6, and the projection lens 8 coincide with each other. A screen 10 (not shown in FIG. 1) is provided on the exit side (right side in the drawing) of the projection lens 8 so as to be orthogonal to the central axis 9A.

  Further, the reflective light valve 5 is provided so as to be orthogonal to the central axis 9A so that the central position in the pixel region is a position (lower side in the figure) that is a predetermined distance α away from the central axis 9A.

  With this configuration, the reflected light emitted from the reflective light valve 5 is refracted by the field lens 7 and projected obliquely. That is, the reflected light that is light-modulated and reflected by the reflective light valve 5 is incident on a position where the optical path of the light beam is separated from the center of the field lens 7 by α (lower side of the lens center in the figure). Injected with a predetermined angle β with respect to the central axis 9A. Reflected light emitted from the field lens 7 at a predetermined angle β enters the wire grid polarizer 6. The wire grid polarizer 6 reflects the S-polarized component of the incident reflected light and emits it as projection light. The projection light emitted from the wire grid polarizer 6 enters the projection lens 8. The optical path of the projection light incident on the projection lens 8 intersects the central axis 9A of the projection lens 8 in the projection lens 8 and exits from a position away from the central axis 9A of the projection lens 8 (upper side in the figure). . As a result, the projection light emitted from the projection lens 8 is projected at a position centered on the upper side in FIG. 2 from the position where the central axis 9A intersects the screen 10, and an image is displayed on the screen 10.

  Next, an illumination system for suppressing the luminance distribution of the projected image in the oblique projection optical system will be described with reference to FIG. FIG. 3 is a side view of the portion of the illumination optical system in FIG. 1 (the direction of the arrow of the BB line in FIG. 1), and shows only the components necessary for explanation. In FIG. 3, only the optical path of G light will be described, but the same applies to R light and B light.

  The illumination optical system shown in FIG. 3 has the same configuration as that in FIG. 1, and the arrangement of optical components in the side surface direction is appropriately set.

  As shown in FIG. 3, the illumination system for the oblique projection optical system includes a G light collimator lens 3G, a first dichroic mirror 32, Fresnel lenses 33 and 34, a second dichroic mirror 38, a wire grid polarizer 6 and The center axis 9B of the field lens 7 is provided so as to coincide. Here, since the wire grid polarizer 6 and the field lens 7 in FIG. 2 are the same as those in FIG. 3, the central axis 9A in FIG. 2 and the central axis 9B in FIG.

  As shown in FIG. 2, the reflection type light valve 5 has a center position in the pixel region that is a predetermined distance α away from the center axis 9B of the wire grid polarizer 6 and the field lens 7 (lower side in the figure). It is provided so as to be orthogonal to the central axis 9B.

  On the other hand, the green LED 21G is provided such that the light emission center position is a position away from the central axis 9B by a predetermined distance γ, and the direction is opposite to the reflective light valve 5 from the central axis 9B (upper side in FIG. 3). It has become.

  The optical axis of the G color light emitted from the G light LED 21G is parallel to the central axis 9B at a position separated by a distance γ on the upper side in FIG. Therefore, the G color light emitted from the G light LED 21G is incident on a position (upper side in FIG. 3) that is a distance γ away from the central axis 9B of the G light collimator lens 3G.

  The G light incident on the G light collimator lens 3G is refracted by the G light collimator lens 3G. By refracting by the G light collimator lens 3G, the optical path of the optical axis of the G color light is bent in the lower right direction in FIG. The G color light whose optical path is bent crosses the central axis 9B in the vicinity of the first dichroic mirror 32 and passes through the Fresnel lenses 33 and 34 and the second dichroic mirror 38.

  The G light transmitted through the second dichroic mirror 38 is selectively transmitted through the wire grid polarizing plate 6 only by the P-polarized light. The optical axis of the P-polarized light of the G color light transmitted through the wire grid polarizer 6 is incident on a position away from the central axis 9B of the field lens 7 (lower side in FIG. 3) and is refracted by the field lens 7. By being refracted by the field lens 7, the optical axis of the G color light is again parallel to the central axis 9B, and the center of the pixel region is arranged at a distance α away from the central axis 9B (lower side in FIG. 3). The incident light enters the reflective light valve 5.

  Next, the operation of the image projection apparatus 1A will be described with reference to FIG.

  The R light emitted from the red LED 21R is incident on the first dichroic mirror 32 via the light tunnel 22R and the collimating lens 3R. The G light emitted from the green LED 21G is incident on the first dichroic mirror 32 via the light tunnel 22G and the collimating lens 3G. The first dichroic mirror 32 has a characteristic of reflecting red band light and transmitting green band light, and synthesizes R light and G light into RG light. The RG light passes through the Fresnel lenses 33 and 34 and enters the second dichroic mirror 38.

  The B light generated from the blue LED 21B is reflected by the reflection mirror 34 via the light tunnel 22B and the collimating lens 3B. The B light passes through the Fresnel lenses 36 and 37 and enters the second dichroic mirror 38. The second dichroic mirror 38 has a characteristic of reflecting blue band light and transmitting red band and green band light. The second dichroic mirror 38 combines the RG light and the B light and emits them as white light. White light emitted from the second dichroic mirror 38 enters the wire grid polarizer 6.

  The wire grid polarizing plate 6 has a characteristic of transmitting P-polarized light and reflecting S-polarized light in incident light, and emits light of the P-polarized component of incident white light toward the field lens 7.

  The P-polarized component light incident on the field lens 7 is adjusted by the field lens 7 so that the light beam is matched with the pixel region of the reflective light valve 5 and is emitted toward the reflective light valve 5.

  Here, as shown in FIG. 3, the green LED 21G includes the collimating lens 3G, the first dichroic mirror 32, the Fresnel lenses 33 and 34, the second dichroic mirror 38, the wire grid polarizer 6, and the field lens 7. It is arranged offset from the central axis 9B at a position separated by a distance γ on the upper side in FIG. Similarly to the green LED 21G, the red LEDs 21R and 21B are also arranged at positions separated from the central axis 9B by a distance γ on the upper side in FIG.

  The G light emitted from the green LED 21G is incident at a distance γ away from the central axis of the collimating lens 3G, is refracted by the collimating lens 3G, and is emitted obliquely toward the lower right direction in FIG. The G light emitted from the collimator lens 3G is combined with the R light by the first dichroic mirror 32 to become RG light, and is combined with the B light by the second dichroic mirror 38 via the Fresnel lenses 33 and 34, and the white light. Become. The white light becomes P-polarized light via the wire grid polarizing plate 6 and is incident on the position away from the central axis 9B of the field lens 7 in the lower side in FIG.

  The P-polarized white light incident on the field lens 7 is refracted by the field lens 7 and is parallel to the central axis 9B from a position (a lower side in FIG. 3) at a distance α from the central axis 9B in the field lens 7. Eject. The P-polarized white light emitted from the field lens 7 is incident on the reflection type light valve 5 that is arranged so as to be offset so that the center of the pixel region is located at a distance α from the central axis 9B.

  Next, the optical path of white light incident on the reflective light valve 5 will be described with reference to FIG.

  The P-polarized white light incident on the reflective light valve 5 is light-modulated by the reflective light valve 5 based on a video signal supplied from the outside, reflected, and emitted as reflected light. The reflected light again enters the wire grid polarizer 6 via the field lens 7, and the S-polarized light that is a light modulation component is reflected by the wire grid polarizer 6 and is emitted as projection light. The projection light emitted from the wire grid polarizer 6 enters the projection lens 8 and is enlarged and projected as an image on the screen 10.

  Here, as shown in FIG. 2, the reflection type light valve 5 includes the field lens 7, the wire grid polarizer 6 and the projection lens 8 from the central axis 9 </ b> A (corresponding to the central axis 9 </ b> B in FIG. 3) to the upper side in FIG. 2. Are offset from each other so that the center of the pixel region is positioned at a distance α. The reflected light emitted from the reflective light valve 5 is incident at a position a distance α away from the central axis of the field lens 7, is refracted by the field lens 7, and is emitted obliquely toward the upper right direction in FIG. 2. The reflected light emitted from the field lens 7 is reflected by the light grid polarization plate 6 through the light modulation component, and is projected through the projection lens 8 centering on a position away from the central axis 9A on the screen 10 in FIG. Is done.

  Here, FIG. 4 shows an enlarged view around the field lens 7 and the reflection type light valve 5. As shown in FIG. 4, the P-polarized white light incident on the field lens 7 is oblique to the plane close to the reflective light valve 5 side of the field lens 7 (relative to the normal line on the flat surface of the field lens 7). At an angle of θ1). The P-polarized white light incident from the oblique direction is refracted by the field lens 7 and enters the reflective light valve 5 from the oblique direction.

  As described above, according to the image projection apparatus 1A according to the first embodiment, the reflection type light valve 5 is arranged offset from the central axis 9A of the projection lens 8 in the downward direction in FIG. For example, the distance between the image projection apparatus 1A and the screen can be shortened by arranging the position offset upward in FIG. Further, the light emitted from the light source 2 can uniformly illuminate the reflective light valve 5, so that the utilization efficiency of the light from the light source 2 can be increased, and an image with less luminance unevenness can be projected onto the screen 10. it can.

[Second Embodiment]
Next, an image projection apparatus according to a second embodiment of the present invention will be described.

  The image projection apparatus 1B according to the second embodiment has the same constituent elements as those of the image projection apparatus 1A according to the first embodiment as shown in FIG. The same reference numerals are given, and duplicate descriptions are omitted. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 5 is a side view of the portion of the illumination optical system in FIG. 1 (the direction of the arrow of the BB line in FIG. 1), and shows only the components necessary for the description. In FIG. 5, only the optical path of G light will be described, but the same applies to R light and B light.

  As shown in FIG. 5, the illumination system for the oblique projection optical system includes a G light collimator lens 3G, a first dichroic mirror 32, Fresnel lenses 33 and 34, a second dichroic mirror 38, a wire grid polarizing plate 6 and The center axis 9B of the field lens 7 is provided so as to coincide. Here, since the wire grid polarizer 6 and the field lens 7 in FIG. 2 are the same as those in FIG. 5, the central axis 9A in FIG. 2 and the central axis 9B in FIG.

  The green LED 21G and the light tunnel 22G are disposed to be inclined with respect to the central axis 9B. For example, the green LED 21G and the light tunnel 22G are arranged so that the emission direction of the G light is obliquely upper right in FIG.

  When arranged in this way, the light path of the G light emitted from the green LED 21G is tilted to the upper right with respect to the central axis 9B. Therefore, the G light is inclined with respect to the incident surface of the collimating lens 3G, is incident on a position away from the central axis, is refracted by the collimating lens 3G, and is emitted obliquely toward the lower right direction in FIG. To do. The G light emitted from the collimator lens 3G follows an optical path similar to that of the first embodiment, and enters the position away from the central axis 9B of the field lens 7 to the lower side in FIG. 5 as P-polarized white light. Hereinafter, similarly to the first embodiment, the P-polarized white light is incident on the reflection type light valve 5, is modulated by the reflection type light valve 5 and emitted as reflected light, and follows the path of FIG. 2 as projection light. Projected onto the screen as projection light.

  Here, FIG. 6 shows an enlarged view of the periphery of the field lens 7 and the reflective light valve 5. As shown in FIG. 6, the P-polarized white light incident on the field lens 7 is oblique to the plane close to the reflective light valve 5 side of the field lens 7 (relative to the normal on the flat surface of the field lens 7). At an angle of θ2. At this time, the incident angle θ2 of the P-polarized white light with respect to the field lens 7 in the second embodiment is larger than the incident angle θ1 of the P-polarized white light with respect to the field lens 7 in the first embodiment. It is set to become. The P-polarized white light incident from an oblique direction is refracted by the field lens 7 and enters the reflective light valve 5. The position of the light source 2, the color synthesizing unit 4, and the polarization illumination unit 6 or the collimator lenses 3R, 3G, 3B and the field lens 7 so that the incident angle θ2 of the P-polarized white light with respect to the field lens 7 becomes a predetermined angle. Thus, the optical path of the P-polarized white light incident on the reflective light valve 5 can be made perpendicular to the reflective light valve 5.

  As described above, according to the image projection apparatus 1B according to the second embodiment, the reflection type light valve 5 is arranged offset from the central axis 9A of the projection lens 8 in the downward direction in FIG. For example, the distance between the image projection apparatus 1B and the screen can be shortened by offsetting upward in FIG. 5 and inclining from the central axis 9B. Further, the light emitted from the light source 2 can uniformly illuminate the reflective light valve 5, and the utilization efficiency of the light from the light source 2 can be further increased, and an image with less luminance unevenness is projected onto the screen 10. be able to.

  In each of the above embodiments, the reflective light valve 5 is disposed with an offset downward, for example, with respect to the central axis 9A, and the light source 2 is disposed with an offset upward, for example. The light source 2 may be disposed offset to the lower side.

  Moreover, although the case where the wire grid polarizing plate was used as the wire grid polarizing plate 6 was demonstrated, a polarization beam splitter can also be used.

  The reflective light valve 5 has been described with respect to the case where a reflective liquid crystal display element is used. However, the reflective light valve 5 may be a display element in which a large number of micromirror surfaces (micromirrors) are arranged in a plane, a so-called digital mirror device. .

DESCRIPTION OF SYMBOLS 1 ... Image projection apparatus 2 ... Light source 3B, 3G, 3R ... Collimating lens 4 ... Color composition means 5 ... Reflection type light valve 6 ... Polarized illumination means 7 ... Field lens 8 ... Projection lens 21B, 21G, 21R ... Light emitting diode 22B, 22G, 22R ... Light tunnel 32 ... First dichroic mirror 33, 34 ... Fresnel lens 35 ... Mirror 36, 37 ... Fresnel lens 38 ... Second dichroic mirror

Claims (4)

A light source;
A first lens which Ru refracts light emitted from the pre-Symbol light source,
Polarized illumination means for transmitting only predetermined linearly polarized light out of the light emitted from the first lens ;
A second lens that refracts linearly polarized light emitted from the polarized illumination means ;
A reflection type light valve for reflecting optically modulated based on the image signal from the outside straight line polarized light exiting from the second lens,
A projection lens that projects the light that is refracted by the second lens after being emitted from the reflective light valve and reflected by the polarized illumination means ;
With
The axis connecting the center of the first lens, the center of the polarized illumination means , the center of the second lens , and the center of the projection lens is on the same plane, and the center of the pixel area of the reflective light valve ; image projection apparatus characterized by being arranged so as not on the plane and the optical path to the projection lens from the light source. The image projection apparatus according to claim 1, wherein a center of a pixel area of the reflective light valve and an emission point of light in the light source are arranged at different positions across the plane. The image projection apparatus according to claim 1, wherein an optical path from the light source to the first lens is parallel to the plane. The light source has a plurality of light emitting diodes,
4. The image projection apparatus according to claim 1, further comprising a color synthesizing unit that synthesizes light emitted from the plurality of light emitting diodes. 5.

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