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Illuminating apparatus and projector

A technology for lighting devices and projectors, applied in projection devices, optics, instruments, etc., can solve the problems of degradation of projected image quality, uneven distribution of light intensity in the plane, etc., and achieve the effect of reducing the size

Inactive Publication Date: 2009-10-07
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in this conventional 2-lamp projector 900, if the light emission of the arc tube in any of the two light source devices 910a, 910b is weakened or cut off, the in-plane light in the illuminated area will The intensity distribution becomes non-uniform, and as a result, there is a problem that the quality of the projected image deteriorates

Method used

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  • Illuminating apparatus and projector
  • Illuminating apparatus and projector
  • Illuminating apparatus and projector

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Deformed example 1

[0116] Table 2 is a table shown for explaining the lighting device 100a according to Modification 1 of the first embodiment.

[0117] Table 2

[0118]

[0119] In the lighting device 100a according to Modification 1 of the first embodiment, as shown in Table 2, the electric power control unit 700 is supplied to the light-emitting tube (the first light-emitting tube 112a ) of electric power W 1 Set to 200W.

[0120] That is, in the lighting device 100a according to Modification 1 of the first embodiment, the electric power control unit 700 has a power control unit 700 that controls the electric power supplied to the first arc tube 112a and the second arc tube 112b so as to satisfy "W 1 = 2W 0 "The relational function.

[0121] Therefore, according to the lighting device 100a of Modification 1 of the first embodiment, the sum of the light quantity of the first luminous tube 112a and the light quantity of the second luminous tube 112b when the two lights are on can be equa...

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Abstract

The present invention provides a two-lamp illuminating device that can be suitably used for a high-brightness projector, and even if the light emission of the light emitting tube is weakened or cut off in a certain light source device of a plurality of light source devices, the surface area of ​​the illuminated area can be suppressed. The uneven distribution of internal light intensity can also suppress the deterioration of the projected image quality. It includes: a polarization beam splitter (190), a first polarization light source device (170), and a second polarization light source device (180). The 1st polarized light source device (170) and the 2nd polarized light source device (180) comprise: light source device (110a, 110b), polarization separation prism (171, 181) and λ / 2 plate (176, 186), polarization beam splitter ( 190) is configured to synthesize the illumination light beam related to the P polarization component emitted from the first polarized light source device (170) and the illuminated light beam related to the S polarization component emitted from the second polarized light source device (180) to form shoot it out.

Description

technical field [0001] The present invention relates to lighting devices and projectors. Background technique [0002] Conventionally, projectors with high luminance have been demanded, and projectors having two light source devices (so-called 2-lamp projectors) have been proposed in response to such demands. Figure 10 It is a figure shown for explaining the conventional 2-lamp projector 900. [0003] The prior art 2-lamp projector 900, such as Figure 10 As shown in , the area to be illuminated is equipped with: a two-lamp illuminating device 902 that emits substantially parallel light, a liquid crystal device 970 that modulates the illuminating beam from the illuminating device 902 according to image information, and a device that projects light modulated by the liquid crystal device 970 Projection optics 980. The lighting device 902 includes: two light source devices 910a, 910b, a triangular prism 903 for synthesizing the light from the two light source devices 910a, 91...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/00G02B27/18
Inventor 秋山光一
Owner SEIKO EPSON CORP