# US 2022/0044646 A1 · System for displaying information to a user > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0044646 A1 - Document ID: US20220044646A1 - Status: Published application - Kind: A1 - Application number: 17/506,750 - Filed: 2021-10-21 - Published: 2022-02-10 - Earliest claimed: 2020-08-31 - Assignees: Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. - Applicants: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. - Inventors: Ivan C. Baines; Moritz Kreysing - Web page: https://patentgrep.com/patent/US20220044646A1 ## CPC - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - G02B 27/0172: {characterised by optical features} - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G09G 2310/0237: Switching ON and OFF the backlight within one frame - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/064: by time modulation of the brightness of the illumination source - G09G 2320/066: for control of contrast - G09G 2330/021: Power management, e.g. power saving - G09G 2360/144: the light being ambient light - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The invention relates to a system for displaying information to a user, comprising: an emission device arranged to emit light so as to display information to a user, the emission device 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 comprising a panel, the panel being adapted so that the user can view the light 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 and the selective viewing device 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. ## Claims ### Claim 1 System for displaying information to a user, comprising: an emission device arranged to emit light so as to display information to a user, the emission device 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 comprising a panel, the panel being adapted so that the user can view the light 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 and the selective viewing device 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, wherein the emission device is adapted to project the information onto the surroundings, with the projecting device being adapted to emit the light in a pulsed manner. ### Claim 2 (depends on 1) System according to claim 1, wherein the duty cycle of the emission device is less than or equal to 1/20. ### Claim 3 (depends on 1) System according to claim 1, wherein the states of the selective viewing device 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 emitting light at a high intensity fall within the time periods during which the selective viewing device has a high transparency, wherein the states of the emission device emitting light at a high intensity coincide substantially with the time periods during which the selective viewing device has a high transparency. ### Claim 4 (depends on 1) System according to claim 1, the system being a head-mounted laser projector, the emission device being a laser light source for emitting visible laser light and having a time averaged optical output power of more than 1 μW and less than 10 mW, with peak intensities exceeding the time-averaged laser power by a factor of higher than 10. ### Claim 5 (depends on 1) System according to claim 1, the system being a head-mounted LED projector, the emission device being an LED light source having a time average optical output power of more than 1 μW and a power of less than 5 W, with peak intensities exceeding the time-averaged optical power by a factor of higher than 10. ### Claim 6 (depends on 1) System according to claim 1, the system being arranged for projecting videos in a domestic or theatre environment, the emission device being arranged to emit light with a peak luminous flux of more than 10,000 lumen. ### Claim 7 (depends on 1) System according to claim 1, wherein the selective viewing device has the form of spectacles, with the panel being one or more of the glasses of the spectacles. ### Claim 8 (depends on 7) System according to claim 7, wherein the emission device is incorporated into or attached to the spectacles. ### Claim 9 (depends on 1) System according to claim 1, the system being arranged so that the emission device synchronizes to the selective viewing device. ### Claim 10 (depends on 1) System according to claim 1, wherein the system synchronizes with an externally provided clock, preferably a radio time signal. ### Claim 11 (depends on 1) System according to claim 1, 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. ### Claim 12 (depends on 11) System according to claim 11, further comprising at least one brightness sensor for sensing the intensity of the surroundings of the emission device. ### Claim 13 (depends on 1) System according to claim 1, 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.