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Illumination apparatus and image projection apparatus

a technology of image projection apparatus and illumination apparatus, which is applied in the direction of lighting and heating apparatus, printing, instruments, etc., can solve the problems of wasteful throwing away of colors other than the separated color, and the method of compacting the entire illumination apparatus in substantial terms

Inactive Publication Date: 2006-07-13
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enables the creation of a compact, high-intensity illumination apparatus with improved light utilization efficiency, reducing waste and enhancing the quality of projected images by precisely controlling light emission and distribution.

Problems solved by technology

However, there are a large number of problems such that even a compact electric-discharging type light-emitting source requires to be driven by a high voltage power supply in which it is difficult to make the circuit dimensions small, or the like, for making an entire illumination apparatus compact, and it is said that the method in which an entire illumination apparatus is made compact substantially realize limit.
When the white system light-emitting source is used, because only one desired color is separated and used, there are a large number of cases in which colors other than the separated color are wastefully thrown away.

Method used

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  • Illumination apparatus and image projection apparatus
  • Illumination apparatus and image projection apparatus
  • Illumination apparatus and image projection apparatus

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0160] As shown in FIG. 1 and FIG. 2, in an illumination apparatus according to the present embodiment, a light guiding rod member 11 serving as a square-shaped optical member formed from an L-shaped optical surface attached to a rod holder 10 serving as a rotatable holder is rotated by a rotating motor 12 serving as a driving section, and a plurality of LEDs 14 serving as illuminants arranged at the inner circumference of an illuminant substrate 13 formed in a drum shape are successively lit in accordance with rotation of the light guiding rod member 11.

[0161] Note that the reason that the light guiding rod member 11 is made to be a square shape is that an efficiency is high in the case of being close to the shape because the LED 14 is a rectangule, and loss when the light guiding rod member 11 is bent in a L shape is suppressed to the minimum. Further, the material of the light guiding rod member 11 is a transparent glass or resin with respect to the a wavelength range of an illu...

second embodiment

[0180] As described above, various applications can be considered for the illumination apparatus described in the first embodiment, and it can be considered that the structure is appropriately changed in accordance with an application to which the illumination apparatus is applied.

[0181] Before the detail of the structural change is described, a conventional illumination apparatus will be described in order to compare therewith. As shown in FIG. 8, the conventional illumination apparatus (hereinafter, referred to as a conventional model) is structured such that a large number of LEDs 14 are fixedly arranged therein, and take-in lenses 40 corresponding to the individual LEDs 14 and the superposing lens 36 superposing light emitted therefrom are provided, and an objective illumination region is illuminated by condensing the light from the large number of LEDs 14 which were simultaneously lit by the take-in lenses 40 and the superposing lens 36. Accordingly, with respect to the light ...

third embodiment

[0190] In the illumination apparatus having the structure as described in the above-described first and second embodiments, because the LEDs 14 are discretely arranged, and discretely repeat flashing and lighting-out, variations in quantity of light arise. This will be described with reference to FIG. 14. Note that FIG. 14 is a diagram in a case in which, given that an arranging pitch of the LEDs 14 is p, and a width of the parallel rod 15 of the light guiding rod member 11 is dy, the relationship of p<dy<2p is established.

[0191] Namely, as shown in FIG. 14, when the light guiding rod member 11 rotates from state □ to state □, in state □, the parallel rod 15 exactly faces a L2nd LED 14, and the L2nd LED 14 is being lit. Further, the rotation further proceeds, and when the light guiding rod member 11 rotates a half of a pitch (p / 2) and is in state □′, lighting is switched from the L2nd LED 14 to the L3rd LED 14. The L3rd LED 14 is being lit until immediately before state □ becomes s...

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Abstract

An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a division of U.S. patent application Ser. No. 10 / 689,260, filed on Oct. 20, 2003, which is based upon and claims the benefit of priority from Japanese Patent Application No. 2002-305962, filed Oct. 21, 2002, and Japanese Patent Application No. 2003-177117, filed Jun. 20, 2003, the entire contents of which are incorporated herein by reference as if fully set forth.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an illumination apparatus in which the light-condensing performance thereof is high and which is high-intensity and compact, and to an image projection apparatus using such an illumination apparatus. [0004] 2. Description of the Related Art [0005] Conventionally, as a light-condensing illumination apparatus efficiently illuminating a specific place, for example, a vehicle headlamp, a floodlight, a spotlight, a flashlight, an illumination unit for a data proj...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03B21/20G02B27/18G02B26/08G02B27/00G02B27/54G03B21/00G03B21/14G03B27/16
CPCF21S10/06F21Y2101/02G02B26/02G02B27/0933G02B27/0994G02B27/1033G02B27/1053G02B27/108G02B27/14G02B27/143G02B27/144G03B21/20G03B27/54H04N9/3111H04N9/3155H04N9/3164H04N9/3197G02B19/0066G02B19/0019G02B19/0028G03B21/2033G03B21/2013G03B21/208F21Y2115/10
Inventor IMADE, SHINICHI
Owner OLYMPUS CORP