Lighting devices for automatically switching between a visible light source and an infrared light source

Patent metadata

Field	Value
Publication number	US-11914178-B2
Application number	US-202117348901-A
Country	US
Kind code	B2
Filing date	Jun 16, 2021
Priority date	Dec 17, 2018
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

The present disclosure relates to a lighting device for automatically switching between a visible light source and an infrared light source. The lighting device may include a light source, an infrared filter, and a driving module for driving the infrared filter.

First claim

What is claimed is:

1. A lighting device for automatically switching between a visible light source and an infrared light source, comprising:
a light source;
an infrared filter; and
a driving module for driving the infrared filter, wherein the infrared filter includes a plurality of blades, the driving module drivers at least one blade of the plurality of blades for automatically switching between the visible light source and the infrared light source, and the driving module includes a plurality of gears, each of the plurality of gears being mounted on each of the plurality of blades.

2. The lighting device of claim 1 , wherein the driving module includes a rotating ring and a plurality of driving arcs, each of the plurality of driving arcs connecting the rotating ring to each of the plurality of blades.

3. The lighting device of claim 1 , wherein the driving module includes a drive rod connecting to each of the plurality of blades.

4. The lighting device of claim 3 , wherein one of the plurality of blades is a master blade and the lighting device further includes:
a motor for providing power to the driving module, the motor including a limiting device for limiting a rotation angle of the plurality of blades; and
a groove connecting the motor to the master blade so that the motor and the master blade rotate synchronously.

5. The lighting device of claim 4 further comprising an optocoupler baffle on the master blade for determining a state of the infrared filter.

6. The lighting device of claim 5 further comprising:
a lamp holder;
a reflection cup;
an isolator mounted on the lamp holder for isolating the light source to the lamp holder and the reflection cup;
an optocoupler mounted below the master blade for determining a position of the optocoupler baffle;
two first pressing plates for fixing the infrared filter;
a first seal for sealing the motor;
a first cover plate for covering the motor;
a second seal for sealing the lamp holder; and
a second cover plate for covering the lamp holder, the second cover plate including a second pressing plate and a glass cover of the lamp holder.

7. The lighting device of claim 1 further comprising:
a photosensor for detecting ambient light around the lighting device.

8. The lighting device of claim 7 , further comprising at least one processor in communication with the photosensor and the driving module, wherein the at least one processor is directed to:
determine a light intensity of the ambient light that the photosensor detects;
in response to a determination that the light intensity is greater than an intensity threshold, send a driving signal to the driving module for driving the infrared filter to a non-working state, wherein the lighting device emits visible light.

9. The lighting device of claim 8 , wherein the at least one processor is further directed to:
in response to a determination that the light intensity is less than the intensity threshold, send a driving signal to the driving module for driving the infrared filter to a working state, wherein the lighting device emits infrared light.

10. The lighting device of claim 1 further comprising a timing control module for controlling time sequences for turning on or turning off the infrared filter.

11. An image capture system, comprising:
an image capture device;
a lighting device configured to automatically switch between a visible light source and an infrared light source of claim 1 ;
at least one storage device including a set of instructions;
at least one processor in communication with the at least one storage device, wherein when executing the set of instructions, the at least one processor is directed to cause the system to:
obtain a first image under the visible light source that the lighting device emits, wherein the first image includes color information;
obtain a second image under the infrared light source that the lighting device emits, wherein the second image includes luminance information; and
generate an enhanced image based on the first image and the second image.

12. The image capture system of claim 11 , wherein the driving module includes a drive rod connecting to each of the plurality of blades.

13. The image capture system of claim 12 , wherein one of the plurality of blades is a master blade and the lighting device further includes:
a motor for providing power to the driving module, the motor including a limiting device for limiting a rotation angle of the plurality of blades; and
a groove connecting the motor to the master blade so that the motor and the master blade rotate synchronously.

14. The image capture system of claim 13 further comprising an optocoupler baffle on the master blade for determining a state of the infrared filter.

15. The image capture system of claim 11 further comprising:
a photosensor for detecting ambient light around the lighting device.

Assignees

• Zhejiang Dahua Technology Co

Inventors

• Zheng Liyun
• Zhan Hui
• Liu Yanhui
• Zhao Yubing

Classifications

• G02B5/208 Primary

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• G02B7/006

  Filter holders · CPC title

• G02B26/002

  the movement or the deformation controlling the frequency of light, e.g. by Doppler effect · CPC title

• G03B11/00

  Filters or other obturators specially adapted for photographic purposes · CPC title

• H04N23/56

  provided with illuminating means · CPC title