System for displaying information to a user

Patent metadata

Field	Value
Publication number	US-2020410944-A1
Application number	US-201816976868-A
Country	US
Kind code	A1
Filing date	Mar 9, 2018
Priority date	Mar 9, 2018
Publication date	Dec 31, 2020
Grant date	—

Abstract

The invention relates to a system for displaying information to a user, comprising: an emission device (12, 13) arranged to emit light so as to display information to a user (18), the emission device (12, 13) being adapted to emit the light in a pulsed manner so that the intensity of the light varies between a high value and a low value, a selective viewing device (16) comprising a panel, the panel being adapted so that the user can view the light (11′) which is emitted by the emission device through that panel so as to visually perceive the information being displayed, the panel having a variable transparency which can be varied between a state of high transparency and a state of low transparency, the system being adapted to synchronize the emission device (12, 13) and the selective viewing device (16) so that the states of the emission device emitting light at a high-intensity value and the states of the panel of the selective viewing device of high transparency overlap in time, the emission device being adapted so that the light is emitted in a pulsed manner with a duty cycle of less than or equal to 1/10, wherein the panel of the selective viewing device is adapted to operate at essentially the same duty cycle.

First claim

1 . System for displaying information to a user, comprising:
an emission device ( 12 , 112 ) arranged to emit light so as to display information to a user, the emission device ( 12 , 112 ) being adapted to emit the light in a pulsed manner so that the intensity of the light varies between a high value and a low value, a selective viewing device ( 16 , 116 ) comprising a panel, the panel being adapted so that the user can view the light which is emitted by the emission device ( 12 , 112 ) through that panel so as to visually perceive the information being displayed, the panel having a variable transparency which can be varied between a state of high transparency and a state of low transparency, the system being adapted to synchronize the emission device ( 12 , 112 ) and the selective viewing device ( 16 , 116 ) so that the states of the emission device ( 12 , 112 ) emitting light at a high-intensity value and the states of the panel of the selective viewing device ( 16 , 116 ) of high transparency overlap in time, the emission device ( 12 , 112 ) being adapted so that the light is emitted in a pulsed manner with a duty cycle of less than or equal to 1/10, wherein the panel of the selective viewing device ( 16 , 116 ) is adapted to operate at essentially the same duty cycle.

2 . System according to claim 1 , wherein the duty cycle of the emission device ( 12 , 112 ) is less than or equal to 1/20, preferably less than or equal to 1/100, more preferably less than or equal to 1/250.

3 . System according to one of the preceding claims, wherein the states of the selective viewing device ( 16 , 116 ) having a high transparency fall within the time periods during which the emission device emits light at a high intensity, or
wherein the states of the emission device ( 12 , 112 ) emitting light at a high intensity fall within the time periods during which the selective viewing device has a high transparency, wherein preferably, the states of the emission device ( 12 , 112 ) emitting light at a high intensity coincide substantially with the time periods during which the selective viewing device has a high transparency.

4 . System according to one of the preceding claims, wherein the emission device ( 12 , 112 ) comprises a screen suitable for use as a computer screen, in a mobile phone, in a laptop computer, in a tablet computer, on a digital camera, in a navigation system and/or in a television set, with the screen being adapted to emit the light in a pulsed manner with a peak illuminance favorably greater than 500 lux, preferably greater than 2000 lux, even more preferably greater than 5000 lux, yet more preferably greater than 30 000 lux, even more preferably greater than 100 000 lux, and most preferably greater than 500 000 lux.

5 . System according to one of claims 1 to 3 , wherein the emission device ( 112 ) is adapted to project the information onto the surroundings, with the projecting device being adapted to emit the light in a pulsed manner.

6 . System according to claim 5 , the system being a head-mounted laser projector, the emission device ( 112 ) being a laser light source for emitting visible laser light and preferably having a time averaged optical output power of more than 1 μW and preferably less than 10 mW, more preferably less than 3 mW, even more preferably less than 1 mW, and most preferably less than 100 μW, with peak intensities exceeding the time-averaged laser power by a factor of higher than 10, preferably higher than 50, most preferably higher than 250.

7 . System according to claim 5 , the system being a head-mounted LED projector, the emission device ( 112 ) being a LED light source preferably having a time average optical output power of more than 1 μW and a power of less than 5 W, preferably less than 250 mW, more preferably less than 10 mW, and most preferably less than 250 μW, with peak intensities exceeding the time-averaged optical power by a factor of higher than 10, preferably higher than 50, most preferably higher than 250.

8 . System according to claim 5 , the system being arranged for projecting videos in a domestic or theatre environment, the emission device ( 112 ) being preferably arranged to emit light with a peak luminous flux of more than 10.000 lumen, preferably more than 50.000 lumen, more preferably more than 100.000 lumen, most preferably more than 500.000 lumen.

9 . System according to one of the preceding claims, wherein the selective viewing device ( 116 ) has the form of spectacles, with the panel being one or more of the glasses of the spectacles.

10 . System according to claim 9 , when dependent on claims 6 and 7 , wherein the emission device is incorporated into or attached to the spectacles.

11 . System according to one of the preceding claims, the system being arranged so that the emission device synchronizes to the selective viewing device.

12 . System according to one of claims 1 to 10 , wherein the system synchronizes with an externally provided clock, preferably a radio time signal.

13 . System according to one of the preceding claims, the system being arranged so that the peak intensity of the light which is emitted is comparable to the intensity of the surroundings of the emission device and preferably at least 3 times higher than the intensity of the surroundings of the emission device.

14 . System according to claim 13 , further comprising at least one brightness sensor for sensing the intensity of the surroundings of the emission device.

15 . System according to claim 5 , wherein the emission device is an LED or laser source utilizing projector that is part of a mobile phone, tablet computer, laptop or other portable electronic device.

Assignees

• Max Planck Gesellschaft

Inventors

• Baines Ivan C
• Kreysing Moritz

Classifications

• H04N13/00

  Stereoscopic video systems; Multi-view video systems; Details thereof · CPC title

• G09G3/00

  Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes · CPC title

• G09G2320/064

  by time modulation of the brightness of the illumination source · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2320/066

  for control of contrast · CPC title