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Projector

A projector and lens array technology, applied in the field of projectors, can solve the problems of the projector being not easily miniaturized and the light utilization efficiency is reduced, and achieve the effect of high-quality moving picture display, restraining large-scale and smooth moving picture display.

Inactive Publication Date: 2009-01-14
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in another conventional projector of this type, since the shutters are respectively arranged in front of the three liquid crystal display devices, there is a problem that the projector is not easy to be miniaturized.
In addition, in this kind of projector, since the light shutter is used to intermittently block the light, not only when smooth and high-quality moving picture display can be obtained, but also when displaying a still picture or when the brightness of the picture is prioritized over the smoothness of moving picture display, There has been a problem that the light utilization efficiency is greatly reduced

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] figure 1 It is a diagram showing the optical system of the projector according to Embodiment 1 of the present invention. figure 1 (a) is a top view of the optical system, figure 1 (b) is a side view of the optical system.

[0056] In addition, in the following description, three directions orthogonal to each other are defined as the z direction ( figure 1 (a) the direction of the illumination optical axis), the x direction (with figure 1 The direction parallel to the paper surface of (a) and perpendicular to the z-axis) and the y-direction (with figure 1 The paper surface of (a) is perpendicular to the direction perpendicular to the z-axis).

[0057] The projector 1000 of Embodiment 1, such as figure 1 (a) and figure 1 As shown in (b), it is a kind of its composition including lighting device 100; the color separation optical system 200 that separates the illumination light beam that lighting device 100 sends into red, green and blue three-color light; Th...

Embodiment approach 2

[0089] Figure 5 It is a diagram for explaining the light shielding member of the projector according to the second embodiment. Figure 5 (a) is a front view of the expanded state of the shading member viewed from the side of the illuminated area, Figure 5 (b) for Figure 5 (a) Left side view. Image 6 It is a diagram for explaining the light shielding member of the projector according to the second embodiment. Image 6 (a) is a front view of the light-shielding member in a contracted state viewed from the illuminated area side, Image 6 (b) for Image 6 (a) Left side view.

[0090] Projector 1000B (not shown) according to Embodiment 2 is characterized in that the light shielding member has a stretchable structure.

[0091] That is, the light shielding member 170 has six cells 171a1 , 171a2 , . In addition, the light shielding member 170 is configured to expand and contract by moving the six units 171a1, 171a2, . . . , 171a6 in parallel, as Figure 5 as shown, can be ...

Embodiment approach 3

[0104] Figure 7 It is a diagram for explaining the light shielding member of the projector according to the third embodiment. Figure 7 (a) is a front view of the shading member in a stretched state viewed from the side of the illuminated area, Figure 7 (b) for Figure 7 (a) Left side view. Figure 8 It is a diagram for explaining the light shielding member of the projector according to the third embodiment. Figure 8 (a) is a front view of the light-shielding member in a contracted state viewed from the illuminated area side, Figure 8 (b) for Figure 8 (a) Left side view.

[0105] A projector 1000C (not shown) according to Embodiment 3 is characterized in that the light shielding member has a stretchable (deployed, folded) structure.

[0106] That is, the light shielding member 180 has six cells 181a1 , 181a2 , . Therefore, the light shielding member 180 is configured by expanding and contracting the six units 181a1, 181a2, . . . , 181a6, such as Figure 7 , can tr...

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Abstract

The invention relates to providing a projector having a structure capable of easy miniaturization although the projector is capable of achieving a smooth moving picture display of good quality. A projector including: an illuminating apparatus 100; a color separating optical system 200; liquid crystal display devices 400R, 400G and 400B; and a projecting optical system 600, the projector further including: a shielding member 160, which is provided in the vicinity of a light emitting surface of a first lens array 120 and in which a light transmitting area 162 and a light non-transmitting area 164 are alternately arranged in an optical path in a first direction vertical to an optical axis of illumination 100ax; and a rotating prism 770, which is provided between a superimposing lens 150 and the color separating optical system 200, for scanning an illuminating light bundle in image forming areas of the liquid crystal display devices 400R, 400G and 400B synchronously with screen writing frequencies of the liquid crystal display devices.

Description

technical field [0001] The present invention relates to projectors. Background technique [0002] Figure 11 It is a diagram for explaining a conventional projector. Figure 11 (a) is a diagram showing an optical system of a conventional projector, Figure 11 (b) and Figure 11 (c) is a diagram for explaining the problems of such a conventional projector. [0003] Since in this projector 900A, the liquid crystal display devices 400R, 400G, and 400B used as electro-optic modulation devices have Figure 11 A hold type display device having the luminance characteristic shown in (b) has the same Figure 11 Unlike the case of a pulse-type display device CRT with a luminance characteristic shown in (c), there is a problem that a smooth moving picture cannot be displayed due to a so-called smearing phenomenon (for example, refer to Non-Patent Document 1 for the smearing phenomenon) ). [0004] Figure 12 It is a diagram for explaining another conventional projector. Figure 12 (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G02F1/1335H04N5/74H04N9/31G02F1/13G03B21/00G09G3/36
CPCH04N9/3197H04N9/3117G03B33/12G03B21/14G03B21/2053G03B21/00
Inventor 秋山光一
Owner SEIKO EPSON CORP