Light intensity adjusting device and method

A light intensity adjustment and lighting device technology, applied in lighting devices, light sources, electric light sources, etc., can solve the problems of inconvenient use of luminous intensity, and achieve the effect of improving user experience

Inactive Publication Date: 2014-07-02
BEIJING JINGDONG SHANGKE INFORMATION TECH CO LTD
View PDF9 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the luminous intensity of the flashlight needs to be manually adjusted by the user in the prior art, which brings great inconvenience to the user during use, and to provide a light-emitting device that can automatically adjust the luminous intensity of the flashlight and other light-emitting devices. Light intensity adjusting device for intensity and a light intensity adjusting method realized by using the light intensity adjusting device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light intensity adjusting device and method
  • Light intensity adjusting device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0027] Such as figure 1 As shown, the light intensity adjustment device of the preferred embodiment of the present invention includes an illumination measurement module 1 and a control module 2 .

[0028] Wherein the light measurement module 1 converts the light intensity of the received light into a voltage after receiving the light in the surrounding environment, and the control module 2 compares whether the voltage is greater than a light intensity threshold, and if so, reduces the light intensity. The duty ratio of the PWM square wave output by the light emitting device, if not, then increase the duty cycle of the PWM square wave output by the light emitting device, so that the light intensity adjusting device of the present invention can automatically adjust a light emitting device ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a light intensity adjusting device and method. The light intensity adjusting device is used for adjusting the luminescence intensity of a luminescence device, and comprises an illumination measuring module for converting received light into a voltage after receiving the irradiation of light; and a control module for comparing whether the voltage is greater than a light intensity threshold, if so, decreasing the duty ratio of PWM square waves outputted by the luminescence device, and if not, increasing the duty ratio of the PWM square waves outputted by the luminescence device. By using the light intensity adjusting device and method, the illumination intensity of light of a surrounding environment can be detected, and through adjusting the duty ratio of the PWM square waves outputted by the luminescence device, the luminescence intensity of the luminescence device can be automatically adjusted, so that it is ensured that a user can be in a quite proper illumination environment at any time at any place, neither eye discomfort due to too strong light nor unclearness due to too weak light is caused, convenience is provided for the user, and the application experience of the user is also improved.

Description

technical field [0001] The present invention relates to a light intensity adjusting device and method, in particular to a light intensity adjusting device capable of automatically adjusting the luminous intensity of light emitting devices such as a flashlight and a light intensity adjusting method realized by the light intensity adjusting device. Background technique [0002] With the entry of LEDs (Light Emitting Diodes) into the field of mobile lighting, flashlights that can adjust the intensity of light output by adjusting the intensity of light output have become very popular. The dimming mechanism is generally to output PWM (pulse width modulation) control waveforms with different duty ratios through the microcontroller of the flashlight to control the duty ratio of LED light emission. For example, the duty ratio of 0.1 is weak light, and the duty ratio of 0.3 is Medium, while a duty cycle of 1.0 is hard light. [0003] The existing dimmable flashlights can be roughly ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 张晓晔
Owner BEIJING JINGDONG SHANGKE INFORMATION TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap