Title:
VIDEO CAMERA
Document Type and Number:
WIPO Patent Application WO/2020/043141
Kind Code:
A1
Abstract:
A video camera, comprising a light supplementing lamp, a photosensitive element, a single chip microcomputer, and a current control circuit. The light supplementing lamp comprises a substrate, and a first light supplementing wafer and a second light supplementing wafer provided on the surface of the substrate. Phosphors are laid on the surface of a region of the substrate around the first light supplementing wafer and the second light supplementing wafer. Light emitted from the first light supplementing wafer is within a first wave band, and light emitted from the second light supplementing wafer is within a second wave band and can simulate phosphors to produce white light. The photosensitive element is used for sensing a light intensity signal of light within a preset range of wave band, and outputting an electric signal matching the light intensity signal by means of a signal output portion. The single chip microcomputer has a signal acquisition end and a plurality of pulse width modulation (PWM) signal output ends. A signal input end is connected to the photosensitive element by means of the signal output portion. The PWM signal output ends are connected to the light supplementing lamp by means of the current control circuit. The single chip microcomputer receives the electric signal via the signal acquisition end. The current control circuit receives a PWM signal output by the PWM signal output ends of the single chip microcomputer to control the light supplementing lamp.
Inventors:
WANG YANXIA (CN)
Application Number:
PCT/CN2019/103117
Publication Date:
March 05, 2020
Filing Date:
August 28, 2019
Export Citation:
Assignee:
HANGZHOU HIKVISION DIGITAL TEC (CN)
International Classes:
H04N5/232; H04N5/225
Foreign References:
| CN106449617A | 2017-02-22 | |||
| CN208849869U | 2019-05-10 | |||
| CN208691388U | 2019-04-02 | |||
| CN208691389U | 2019-04-02 | |||
| CN208691390U | 2019-04-02 | |||
| CN102955326A | 2013-03-06 | |||
| US20160109789A1 | 2016-04-21 | |||
| CN205029744U | 2016-02-10 |
Attorney, Agent or Firm:
PATENTSINO IP FIRM (CN)
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