Light-emitting device, optical device, measuring device, and information processing device

Through the flexible control of the light emitting elements and driving elements in the light emitting device, the sequential and parallel light emitting actions of multiple light emitting elements are solved, the light irradiation area of the light source is expanded, and the light quantity requirements for three-dimensional shape measurement and face certification are met.

CN113446531BActive Publication Date: 2025-08-12FUJIFILM BUSINESS INNOVATION CORP
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Patent Information

Application Number
CN202011389280.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-03-25
Filing Date
2020-12-02
Publication Date
2025-08-12
Estimated Expiration
2040-12-02

AI Technical Summary

Technical Problem

The prior art is difficult to achieve flexible control of sequential and parallel light emission actions of multiple light emitting elements, especially when the light quantity of the light source is large in three-dimensional shape measurement and face authentication, it is difficult to meet the high-efficiency illumination requirements.

Method used

The light emitting device including a plurality of light emitting elements and driving elements is adopted, and the light emitting elements are lit in sequence or in parallel through the switching control of the control unit. The power line, the driving signal line and the lighting signal line are used to switch the conduction state of the light emitting element, and the light irradiation area is expanded by combining diffusion and diffraction members.

Benefits of technology

It realizes flexible control of multiple light emitting elements, improves the light amount and irradiation area of the light source, and supports efficient three-dimensional shape measurement and face authentication.

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Abstract

The present disclosure relates to a light-emitting device, an optical device, a measuring device, and an information processing device. The light-emitting device includes: a light source having a plurality of light-emitting elements and a plurality of driving elements, the plurality of driving elements being provided corresponding to the plurality of light-emitting elements and driving the light-emitting elements to light up by being in a conductive state; and a control unit that switches control between a sequential lighting operation in which the plurality of light-emitting elements are lit sequentially and a simultaneous lighting operation in which the plurality of light-emitting elements are lit simultaneously and in parallel. The light source includes: a power line set to a reference potential or a power supply potential; a drive signal line connected to the power line for supplying a drive signal to the driving elements; and a lighting signal line for supplying a lighting signal to the plurality of light-emitting elements.
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Citation Information

Patent Citations

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    JP1989238962A

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    JP2001308385A

  • Light source head and image forming apparatus

    JP2009286048A

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    JP2014012384A

  • Display

    JP2015014700A