Rear projection augmented reality display system capable of eliminating bright spots

An augmented reality and display system technology, applied in optics, magnifying glass, instruments, etc., can solve the problems of losing virtual screen information, reducing user experience, etc., and achieve the effect of reducing volume and solving discomfort

Active Publication Date: 2018-10-12
LIGHTIN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The principle of the rear-projection screen is to forward-scatter the light incident on the screen. Since the transmittance of direct light is much greater than its scattering rate, the obs

Method used

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  • Rear projection augmented reality display system capable of eliminating bright spots
  • Rear projection augmented reality display system capable of eliminating bright spots
  • Rear projection augmented reality display system capable of eliminating bright spots

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] The optical path structure of the rear projection augmented reality display system of this embodiment is as follows: figure 1 As shown, the rear projection augmented reality display system includes a microdisplay 101 , a projection lens group 102 , a 45-degree flat mirror 103 , a rear projection screen 104 , an eyepiece 105 and a transflective flat plate 106 .

[0053] The microdisplay 101 and the projection lens group 102 form an off-axis system (that is, the microdisplay 101 is not on the optical axis of the projection lens group 102), and finally the virtual information projected on the microdisplay 101 (that is, the augmented reality generated by the microdisplay is used for augmented reality). The image light) is turned and incident on the rear projection screen 104 obliquely after being deflected by the 45-degree flat mirror 103 . The rear projection screen 104 scatters the incident light forward, and its scattering characteristic is independen...

Example Embodiment

[0062] Example 2

[0063] The optical path structure of the rear projection augmented reality display system of this embodiment is as follows: figure 2 As shown, the rear projection augmented reality display system includes a microdisplay 201 , a projection lens group 202 , a 45-degree flat mirror 203 , a field lens 204 , a rear projection screen 205 , a first eyepiece 206 and a second eyepiece 207 .

[0064] The virtual information projected on the microdisplay 201 (ie, the image light used for augmented reality) is normally incident on the field lens 204 after being projected by the projection lens group 202 and turned by the 45-degree flat mirror 203 . The function of the field lens 204 is to change the direction of the chief ray of the projection light of each field of view, so that the chief ray of the projected light of each field of view is incident on the rear projection screen 205 vertically. The rear projection screen 205 scatters the incident light forward, and it...

Example Embodiment

[0071] Example 3

[0072] The optical path structure of the rear projection augmented reality display system of this embodiment is as follows: image 3 As shown, the rear projection augmented reality display system includes a microdisplay 301 , a projection lens group 302 , a 45-degree flat mirror 303 , a field lens 304 , a rear projection screen 305 , a first eyepiece 306 and a second eyepiece 307 .

[0073] The positional relationship of each part is the same as that of the second embodiment, and the difference from the second embodiment is the first eyepiece 306 and the second eyepiece 307 . The surface shapes of the first eyepiece and the second eyepiece in Example 2 satisfy odd-order polynomials, and the surface shapes of the first eyepiece and the second eyepiece in Example 2 satisfy the XY polynomial.

[0074] Table 3 is a data table of the rear projection augmented reality display system of this embodiment. The diameter of the exit pupil of this embodiment is 10 mm, t...

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Abstract

The invention discloses a rear projection augmented reality display system capable of eliminating bright spots. According to the first scheme, the system comprises a micro displayer, a projection lensset, a rear projection screen and a visual lens set; light beams output by the micro displayer are effected by the projection lens set and the rear projection screen in sequence, then reach the visual lens set, and then are effected by the visual lens set to enter a human eye and form an image at the human eye; ambient light passes through the visual lens set to enter the human eye and form an image at the human eye; the micro displayer and the projection lens set are subjected to off-axis. According to another scheme, a field lens is arranged between the projection lens set and the rear projection screen, and makes main light of projection light in the full field-of-view parallel to the normal of the rear projection screen; the ambient light passes through the visual lens set to enter the human eye and form an image at the human eye; the rear projection screen and the visual lens set are subjected to off-axis. According to the rear projection augmented reality display system, by means of off-axis, light in a bright spot area falls outside the human eye view, and then the bright spots in rear projection display are eliminated.

Description

technical field [0001] The invention relates to the technical field of augmented reality display, in particular to a rear projection augmented reality display system capable of eliminating bright spots. Background technique [0002] Augmented reality technology (Augmented Reality, referred to as AR), is a new technology that "seamlessly" integrates real world information and virtual world information. (Visual information, sound, taste, touch, etc.), through computer and other science and technology, simulate and then superimpose, apply virtual information to the real world, and be perceived by human senses, so as to achieve a sensory experience beyond reality. The real environment and virtual objects are superimposed on the same screen or space in real time. [0003] Augmented reality technology not only shows the information of the real world, but also displays the virtual information at the same time, and the two kinds of information complement and superimpose each other....

Claims

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Application Information

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IPC IPC(8): G02B27/01G02B27/00G03B21/00G03B21/28G02B25/00
CPCG02B25/001G02B27/0012G02B27/0101G03B21/005G03B21/28
Inventor 张卓鹏魏一振钱伟
Owner LIGHTIN INC
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