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Image display device

An image display device, a technology of polarized light, applied in image communication, transportation and packaging, editing/combining graphics or text, etc., can solve problems such as reduced visibility, inability to visually view images, and lack of field of view

Inactive Publication Date: 2017-03-22
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, loss of field of view (vignetting) occurs in the display of images, backgrounds, etc., so that the user cannot see the original image, and the visibility is reduced.

Method used

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Experimental program
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no. 1 approach

[0049] First, a first embodiment of the image display device of the present invention will be described.

[0050] figure 1 is a diagram showing a schematic configuration of the first embodiment (head-mounted display) of the image display device of the present invention, figure 2 yes figure 1 The image shown shows a partial enlargement of the device. and, image 3 yes figure 1 A schematic configuration diagram of a signal generation unit of the image display device shown, Figure 4 is showing figure 1 A diagram showing a schematic structure of the light scanning part included in the scanning light emitting part, Figure 5 is used to illustratefigure 1 The image shown shows a diagram of the action of the device.

[0051] also, figure 1 , for convenience of description, the X-axis, Y-axis and Z-axis are shown as three mutually orthogonal axes, and the front end side of the arrow shown in the figure is "+ (positive)", and the base end side is as "-(negative)". In additi...

no. 2 approach

[0161] Next, a second embodiment of the image display device of the present invention will be described.

[0162] Figure 7 It is a diagram for schematically explaining the operation of the image display device according to the second embodiment. and, Figure 8 (a) is viewed from the Y-axis direction Figure 7 A diagram of the diffractive optics section 9 is shown, Figure 8 (b) is the figure which looked at the diffractive optical part 9 from the X-axis direction.

[0163] Hereinafter, the second embodiment will be described, but in the following description, the differences from the above-mentioned first embodiment will be mainly described, and the description of the same matters will be omitted. In addition, in the drawings, the same reference numerals are assigned to the same items as those in the above-mentioned embodiment.

[0164] The diffractive optical section 9 of the second embodiment is the same as the diffractive optical section 9 of the first embodiment exce...

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PUM

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Abstract

The purpose of this invention is to provide an image display device that has a simple architecture and exhibits good see-through performance and good visibility. Said image display device is characterized by the provision of the following: a light-source unit that generates signal light (L1) consisting of transverse electric waves; a scanning light-outputting unit that has an optical scanner (42) that uses said signal light (L1) to perform scanning; a reflective optical unit (6) that reflects the signal light (L1) being used by the optical scanner (42) to perform said scanning; a diffractive optical unit (9) that contains a pair of diffraction gratings, the grating patterns of which are equivalent to each other, and diffracts the signal light (L1) reflected by the reflective optical unit (6); and a polarization selection unit (8) that is located on the opposite side of the reflective optical unit (6) from the diffractive optical unit (9) and allows outside light (L2) consisting of transverse magnetic waves to pass therethrough toward the reflective optical unit (6). This image display device is also characterized in that the diffractive optical unit (9) diffracts the signal light (L1) but not the outside light (L2).

Description

technical field [0001] The present invention relates to an image display device. Background technique [0002] A head-mounted display (HMD) is known as a display device that directly irradiates laser light to the retina of the pupil to allow the user to visually view an image. [0003] Generally speaking, a head-mounted display includes: a light emitting device that emits light; and a scanning mechanism that changes the light path so that the emitted light scans the user's retina. With such a head-mounted display, for example, the user can simultaneously view both the external scenery and the image drawn by the scanning mechanism. [0004] For example, Patent Document 1 discloses an image display device, which includes a light source device, a transmissive spatial light modulation element, a holographic polymer-dispersed liquid crystal optical element, two 1 / 4 wavelength plates, a free-form surface half mirror, and a polarizer. The light beam emitted from the light source ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01B60K35/00G02B27/02H04N5/64
CPCH04N5/64G02B27/0081G02B27/0172G02B5/1823G02B27/0101G02B27/283G02B27/4227G02B27/4261G02B2027/0125G02B2027/013B60K35/60B60K35/22B60K35/80B60K35/00G06T11/60
Inventor 横山修
Owner SEIKO EPSON CORP