Method and system for controlling light output based on boundary light level thresholds

By adjusting projector output based on measured light levels and boundary thresholds, the risk of hazardous light exposure is mitigated, allowing for increased seating and revenue in theatres with high-power light sources.

JP7752680B2Active Publication Date: 2025-10-10IMAX CORP
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Patent Information

Application Number
JP2023509549
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-08-12
Filing Date
2021-08-06
Publication Date
2025-10-10
Estimated Expiration
2041-08-06

AI Technical Summary

Technical Problem

Theatre projectors with high-power light sources pose a risk of hazardous light exposure to viewers, necessitating structures that block access to unsafe light areas, reducing usable seating and revenue.

Method used

A sensor measures light levels to adjust projector output based on boundary thresholds, ensuring safe light levels below hazardous limits, thereby minimizing the need for obstructive structures.

Benefits of technology

This approach reduces the extent of obstructive structures, maximizing usable seating while maintaining safe light levels for viewers, thus preserving revenue and viewer comfort.

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Abstract

The system may include a projector subsystem in a theater that projects light toward a screen, a sensor that measures the light level of the projected light, and a processing device. The projector subsystem may project the light so that there is a hazardous light region and a non-hazardous light region in an audience seating area. The processing device may receive the measured light level of the projected light from the sensor. The processing device may determine a second light level between the hazardous light region and the non-hazardous light region based on the measured light level and the position of the projected light in the audience seating area. The processing device may compare the second light level with a non-safety threshold light level. The processing device may determine a configuration of the system so that the light level of the light projected in the non-hazardous light region is lower than the non-safety threshold light level.
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