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Laser image display

一种图像显示装置、激光的技术，应用在放映装置、图像通信、利用投影装置图像重现器等方向，能够解决未进行过讨论等问题

Inactive Publication Date: 2006-12-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optimal positional relationship between the diffusion unit optical system and the spatial light modulation element has not been discussed so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 The schematic structure of the laser image display apparatus of this invention is shown. Light emitted from the red laser light source 1a, the green laser light source 1b, and the blue laser light source 1c are condensed by condenser lenses 9a, 9b, and 9c, respectively. The condensed light passes through the beam expander optical system 2 and the integrator optical system (illumination optical system) 3, and after being shaped into a beam with uniform light intensity distribution, it is irradiated on the electrophoretic diffuser plate (light diffusion unit) (electrophoretic diffuser unit) respectively. ) 10a, 10b, 10c. The light incident on the electrophoretic diffusion plates 10a, 10b, and 10c is scattered by the light scattering objects enclosed therein. As a result, the traveling direction of light passing through the electrophoretic diffusion plates 10a, 10b, and 10c is diffused.

[0024] The laser light diffused by the electrophoretic diffusion plates ...

Embodiment 2

[0052] In addition, another structure of the laser image display device of the present invention, such as Figure 4 As shown, the speckle noise is reduced and removed by integrating the electrophoretic diffusion plate 10 sealed with light scattering objects and the spatial light modulation element 5 . Here, optical systems such as the integrator optical system 3 are omitted for simplicity. In this structure, after the light beam emitted from the light source passes through the beam expander optical system and the integrator optical system, the light beam can be irradiated in a uniform illuminating light state on the optical system integrated with the electrophoretic moving scattering plate 10 and the spatial light modulation element 5. on the system. Alternatively, it can be as Figure 5 The shown spatial light modulation element is a reflective spatial light modulation element structure. Here, LCOS (Liquid Crystal On Silicon), which is representative of the reflective liqu...

Embodiment 3

[0054] In addition, another structure of the laser image display device of the present invention, such as Figure 6 As shown, a diffuser plate enclosing a light-scattering object and a liquid crystal used in a two-dimensional spatial light modulator for projecting images are enclosed in the same liquid. For example, by making the particles flow under the action of heat, it functions as a diffusion plate, and on the other hand, by controlling the liquid crystal ( Figure 6 Reflective liquid crystal is used in it), so that it can function as a two-dimensional light modulation element.

[0055] Here too, as in Example 1, in order to minimize light loss and brightness unevenness, it is necessary to arrange the distance between the diffusion plate and the light modulation element at an optimum position. Therefore, it is necessary to separate the positions of the diffusion function and the light modulation function, and the particles and liquid crystals enclosed in the same liquid ...

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PUM

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Abstract

A light diffusion means where light scattering objects are sealed is provided at an optimal position between a spatial optical modulation element and an illumination optical system. Particles as the light scattering objects diffuse a light beam exiting from a laser light source. An unspecified large number of multiple speckle patterns are thereby formed and the speckle noise occurring in an image projected onto, for example, a screen is reduced. Consequently, a laser image display capable of reducing the loss in quantity of light after light diffusion and displaying a high-quality bright image having no brightness variation is provided.

Description

technical field [0001] The invention relates to an image display device using laser light as a light source. More specifically, it relates to a laser image display device having means for reducing speckle noise occurring in the display. Background technique [0002] Figure 7 Shown is a schematic structure of a conventional laser display. The light emitted by the laser light sources 101a to 101c of RGB three colors (R: red, G: green, and B: blue) first passes through an expander optical system including collective lenses 109a to 109c 102 and expanded by the beam. Then, the enlarged light passes through an integrator optical system 103 including a lens and a small lens array (lens array), and is shaped into a beam to uniformly irradiate the spatial light modulation element 105 . Here, field lenses (field lenses) 104 a to 104 c convert the light passing through the spatial light modulation elements 105 a to 105 c into converging beams so that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/00G02F1/13G03B21/14H04N9/31
CPCH04N9/3129
Inventor 森川显洋笠澄研一水内公典
Owner PANASONIC CORP
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