Transmission-type screen and rear-projection projector
A screen and micro-lens technology, applied to projectors with built-in screens/outside screens, using projection device image reproducers, lenses, etc., can solve problems such as moiré fringes and diffracted light, and achieve display Excellent quality and the effect of suppressing diffracted light
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Embodiment approach 1
[0058] figure 1 It is a diagram showing the cross-sectional structure of the transmissive screen of the first embodiment. In addition, figure 2 It is an exploded perspective view showing the transmissive screen of Embodiment 1. Such as figure 1 as well as figure 2 As shown, the transmissive screen 100 includes: a Fresnel lens portion 110 on which a Fresnel lens is formed on the exit surface side surface; and is arranged on the exit surface side of the Fresnel lens portion 110 and one on the entrance surface. A micro lens array part 120 having a plurality of micro lenses formed on the side surface; and a light diffusion part 130 arranged between the Fresnel lens part 110 and the micro lens array part 120.
[0059] Therefore, if the transmissive screen 100 is used, since the light diffusion section 130 is arranged between the Fresnel lens section 110 and the micro lens array section 120, the diffracted light and moire of the transmissive screen 100 can be effectively suppressed...
Embodiment approach 2
[0071] Figure 5 It is an external view showing a rear projection type projector according to Embodiment 2 of the present invention. Figure 6 It is a diagram showing an optical system of a rear projection type projector according to Embodiment 2 of the present invention. Such as Figure 5 as well as Figure 6 As shown, the rear projection projector 10 of the second embodiment has a structure in which the projection optical unit 20, the light guide mirror 30, and the transmissive screen 40 are arranged in a housing 50.
[0072] In addition, the rear projection type projector 10 adopts the transmission type screen 100 in Embodiment 1 in which diffracted light and moire are less likely to occur as its transmission type screen 40. Therefore, it becomes a rear projection type projector with excellent display quality that suppresses the occurrence of diffracted light and moiré.
Embodiment approach 3
[0074] Figure 7 It is a diagram showing an optical system of a rear projection type projector according to Embodiment 3 of the present invention. Such as Figure 7 As shown, the rear projection type projector 12 of the third embodiment has a structure in which the projection optical unit 20 and the transmissive screen 40 are arranged in a housing 52.
[0075] The difference between the rear projection type projector 12 of Embodiment 3 and the rear projection type projector 10 of Embodiment 2 lies in the presence or absence of a light guide mirror. That is, in contrast to the rear projection type projector 10 of the second embodiment including the light guide mirror 30, the rear projection type projector 12 of the third embodiment does not include the light guide mirror 30. Therefore, it is possible to eliminate the image degradation caused by the reflection of the projected image by the light guide mirror, so the display quality of the projected image projected on the screen 40 ca...
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Abstract
Description
Claims
Application Information
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