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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 observer will feel obvious bright spots when receiving this part of the direct light, which is serious enough to cause The information of the virtual screen is lost, which reduces the user experience

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

Embodiment 1

[0052] The optical path structure of the rear projection 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 set 102 , a 45-degree flat mirror 103 , a rear projection screen 104 , an eyepiece 105 and a transflective panel 106 .

[0053] The micro-display 101 and the projection lens group 102 form an off-axis system (that is, the micro-display 101 is not on the optical axis of the projection lens group 102), and finally the virtual information projected on the micro-display 101 (that is, the information generated by the micro-display for augmented reality) Image light) is obliquely incident on the rear projection screen 104 after being bent by the 45-degree plane reflector 103. The rear projection screen 104 forward-scatters the incident light, and its scattering characteristics have nothing to do with the angle of the incident light,...

Embodiment 2

[0063] The optical path structure of the rear projection 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 set 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 micro-display 201 (that is, image light for augmented reality) is projected by the projection lens group 202 and deflected by the 45-degree flat reflector 203 before being incident on the field lens 204 . The function of the field lens 204 is to change the direction of the principal ray of projection light in each field of view, so that the principal ray of projection light in each field of view is incident vertically on the rear projection screen 205 . The rear projection screen 205 forward-scatters the incident light, its scattering chara...

Embodiment 3

[0072] The optical path structure of the rear projection 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 set 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 Embodiment 2, and the difference from Embodiment 2 lies in the first eyepiece 306 and the second eyepiece 307 . The surface shapes of the first eyepiece and the second eyepiece in Embodiment 2 satisfy an odd polynomial, and the surface shapes of the first eyepiece and the second eyepiece in Embodiment 2 satisfy an XY polynomial.

[0074] Table 3 is the data sheet of the rear projection augmented reality display system of this embodiment. The exit pupil diameter of this embodiment is 10 mm, the exit pupil distance is 16...

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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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