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Lighting device and projection type display system

A lighting device and projection technology, applied in projection devices, optics, instruments, etc., can solve problems such as miniaturization of difficult-to-projection display devices

Inactive Publication Date: 2005-08-31
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, when used for illumination of projection-type display devices, etc., it is necessary to add optical elements such as polarizing elements and light homogenizing elements before use, and there is a problem that it is difficult to realize miniaturization of projection-type display devices, etc.

Method used

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  • Lighting device and projection type display system
  • Lighting device and projection type display system
  • Lighting device and projection type display system

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0057] Below, see Figure 1 to Figure 9 Embodiment 1 of the present invention will be described.

[0058] First, see figure 1 A projection display device according to Embodiment 1 of the present invention will be described. The projection display device of this embodiment performs spatial modulation on the different color lights of R (red), G (green), and B (blue) emitted from the solid light source by means of liquid crystal light valves, and then uses cross division It is a three-panel projection type color display device that synthesizes color prisms and displays color images.

[0059] figure 1 The outline of the projection display device of this embodiment is shown.

[0060] Projection-type display devices, such as figure 1 As shown, from the illuminating devices 1r, 1g, and 1b that respectively emit different colored lights of R, G, and B, the liquid crystal light valves (objects to be illuminated, light modulating devices) 40r, 40g, and 40b that spatially modulate t...

Embodiment approach 2

[0122] Second, see Figure 12 Embodiment 2 of the present invention will be described.

[0123] The projection display device of this embodiment is a single-panel type projection display device that spatially modulates white light emitted from a solid-state light source by means of a liquid crystal light valve provided with a color filter to display a color image. In addition, the same code|symbol is attached|subjected to the same component as Embodiment 1, and description is abbreviate|omitted.

[0124] Figure 12 The outline of the projection display device of this embodiment is shown.

[0125] Projection-type display devices, such as Figure 12 As shown, it is schematically composed of an illumination device 150 that emits white light, a liquid crystal light valve (light modulation device) 160 that spatially modulates the white light to form a color image, and a projection lens 70 that projects a color image.

[0126] The illuminating device 150 is composed of an LED (s...

Embodiment approach 3

[0140] Second, see Figure 13 to Figure 15 Embodiment 3 of the present invention will be described.

[0141] The basic configuration of the projection display device of this embodiment is the same as that of the first embodiment, but the configuration of the lighting device is different from that of the first embodiment. Therefore, in this embodiment, with Figure 13 and Figure 15 Only the periphery of the lighting device will be described, and the description of the cross dichroic prism and the like will be omitted.

[0142] Figure 13 The outline of the projection display device of this embodiment is shown.

[0143] Projection-type display devices, such as Figure 13 As shown, the lighting devices 170r, 170g, and 170b that emit different colored lights of R, G, and B respectively, and the liquid crystal light valves 40r, 40g, and 40b that spatially modulate the colored lights combine the modulated colored lights to form A cross dichroic prism 60 for a color image and ...

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Abstract

To provide a miniaturized lighting device that emits light appropriate for illumination of a display system and a projection type display system including the lighting device. A lighting device includes solid-state light sources to emit light, light introducing elements to equalize an illumination distribution of the light emitted from the solid-state light sources, and reflection type polarizing elements into which the light emitted from the solid-state light sources is introduced. The lighting device is characterized in that the reflection type polarizing elements are disposed inside the light introducing elements or on light exit end faces of the light introducing elements, and that the solid-state light sources reflect the light which has been reflected by the reflection type polarizing elements.

Description

technical field [0001] The present invention relates to an illumination device and a projection type display device. Background technique [0002] In recent years, information equipment has advanced rapidly, and demands for high-resolution, low-power consumption, and thin display devices have been increasing, and research and development have continued. Among them, a liquid crystal display device is highly expected as a display device capable of changing optical characteristics by electrically controlling the arrangement of liquid crystal molecules and meeting the above-mentioned needs. As one form of such a liquid crystal display device, there is known a projection type display device (projector) that enlarges and projects an image emitted from an image source constituted by an optical system using a liquid crystal light valve onto a screen through a projection lens. [0003] As an illuminating device for a projection display device, for example, an illuminating device inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02B27/09G02B27/14G02B27/28G02F1/13357G03B21/00G03B21/14G03B21/20
CPCG02B27/1046G02B27/149G02B27/0994G03B21/2073G03B21/208G02B27/283H04N9/315G02B27/18G03B21/14
Inventor 松原贵之米窪政敏
Owner SEIKO EPSON CORP