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Illumination optical system, image display apparatus using same and image display method

Inactive Publication Date: 2006-07-06
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] The present invention provides an illuminating optical system with high efficiency by adjusting a divergent direction of light emitted from a lamp light source and a projection type image display apparatus using the same.

Problems solved by technology

The aforementioned conventional illuminating optical system is not without problems.
For example, when using the lamp light source as a light source, light emitted from the lamp light source is incident on the fly eye lens or the glass rod without changing the shape of the light, thereby reducing optical efficiency.
Thus, when the circular light emitted from the lamp light source is incident on the rectangular shaped fly eye lens or the glass rod, light loss is caused due to a difference in shapes.
If a size of the light spot is larger than that of the second fly eye lens, the portion beyond the size of the second fly eye lens is lost, thereby reducing the optical efficiency.
However, in this case, an effective area of the light valve is reduced.
If the effective area of the light valve is reduced, condensing light on the light valve is difficult, thereby reducing the optical efficiency.

Method used

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  • Illumination optical system, image display apparatus using same and image display method
  • Illumination optical system, image display apparatus using same and image display method
  • Illumination optical system, image display apparatus using same and image display method

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first embodiment

[0069]FIG. 9 shows a projection type image display apparatus using an illuminating optical system with high efficiency according to the present invention.

[0070] Referring to FIG. 9, the projection type image display apparatus includes an illuminating optical system 30, a glass rod 33 used as a light mixture device, and a light valve 37. The projection type image display apparatus further includes a condensing lens 31 and a relay lens 35. As described above, the illuminating optical system 30 includes a lamp light source 1 and a reflecting mirror device 10 for adjusting a divergent direction of light emitted from the lamp light source 1.

[0071] Substantially circular light 1a′ emitted from the lamp light source 1 is incident on the reflecting mirror device 10. The divergent direction of the incident light is adjusted into elliptical or substantially elliptical light 1a and reflected toward a condensing lens. After the condensing lens 31 condenses light reflected by reflecting mirror ...

second embodiment

[0079]FIG. 10 shows a projection type image display apparatus using a highly efficient illuminating optical system the present invention.

[0080] The projection type image display apparatus according to the second embodiment of the present invention has the same optical structure as that of the projection type image display apparatus according to the first embodiment of the present invention shown in FIG. 9, except that two fly eye lenses 41 and 43 instead of a glass rod are used as a light mixture device. In FIG. 10, the same reference numerals as those in FIG. 9 represent the same elements, and thus their descriptions will be omitted.

[0081] When the fly eye lenses 41 and 43 are used as a light mixture device in the second embodiment of the present invention, a section area of the fly eye lenses 41 and 43 is greater than that of the glass rod used as a light mixture device in the first embodiment shown in FIG. 9, and thus a condensing lens 31 (refer to FIG. 9) can be advantageously...

third embodiment

[0086] Referring to FIG. 11, the single-panel color image display apparatus according to the present invention includes an illuminating optical system 30, a colored light separator 120 which separates light emitted from a lamp light source 1 according to color (i.e., by wavelength A ranges corresponding to different colors), and a light valve 140 which controls incident light on a pixel-by-pixel basis according to an input image signal and forms a color image. That is, the single-panel color image display apparatus forms a color image using the single light valve 140.

[0087] As described above, the illuminating optical system 30 adjusts a divergent direction of light 1a′ emitted from the lamp light source 1 by a reflecting mirror device 10 in which double reflecting mirror arrays 11 are formed in a portion thereof so that the circular light 1a′ is converted into elliptical or near-elliptical light 1a.

[0088] The colored light separator 120 includes three or more dichroic filters to s...

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PUM

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Abstract

An illuminating optical system including a lamp light source and a reflecting mirror device. The lamp light source emits light. The reflecting mirror device having double reflecting mirror arrays formed in at least a portion thereof which at least partly adjust a divergent direction of light emitted from the lamp light source.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a Divisional of U.S. patent application Ser. No. 10 / 654,614, filed Sep. 4, 2003, currently pending, and claims the benefit of priority of Korean Patent Application No. 2002-53320, filed on Sep. 4, 2002, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an illuminating optical system and an image display apparatus using the same, and more particularly, to highly efficient illuminating optical system with high optical efficiency, an image display apparatus using the same, and an image display method. [0004] 2. Description of the Related Art [0005] Projection type image display apparatuses focus light emitted from a light source on a microdisplay, that is, a light valve such as, for example, a liquid crystal display (LCD) or a digital microdisplay (DMD) and control ...

Claims

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Application Information

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IPC IPC(8): G02B27/14G02B27/09G02B27/28H04N9/31
CPCG02B27/0977G02B27/286H04N9/3117H04N9/315H04N9/31
Inventor CHO, KUN-HOKIM, DAE-SIKKIM, SUNG-HALEE, HEE-JOONG
Owner SAMSUNG ELECTRONICS CO LTD