Colour sequential lighting device

A technology for lighting devices and cooling devices, which is applied in the direction of lighting devices, components of lighting devices, cooling/heating devices of lighting devices, etc., and can solve problems such as frequency dimming

Active Publication Date: 2014-12-10
SIGNIFY HLDG BV
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US2009/0187234 further proposes to use Pulse Width Modulation (PWM) of the cu

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
  • Colour sequential lighting device
  • Colour sequential lighting device
  • Colour sequential lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] A lighting device is provided comprising a plurality of LEDs, such as at least two LEDs, arranged in a configuration such that a movable member comprising a plurality of translucent portions can be positioned and moved relative to the LEDs such that light emitted from the LEDs Transmission through multiple translucent sections. Some of the translucent parts are provided with wavelength converting materials such that the wavelength of light transmitted therethrough is converted. The movable part moves at such a speed that the different wavelengths of light are perceived by the human eye as a single color of light without any noticeable flickering. A control unit connected to the lighting device is adapted to control the input power supplied to the individual LEDs, eg by means of pulse width modulation, such that certain LEDs can be dimmed. The sequential timing between the movement of the movable part comprising multiple parts and the pulses of power supplied to the ind...

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

Lighting device (1) comprising a plurality of LEDs (2a - 2h) and a movable member (3) comprising a plurality of translucent segments (S1 - S8) arranged such that the light from the LEDs (2a - 2h) is transmitted therethrough. At least one of the translucent segments (S1 - S8) comprises a wavelength conversion material. The lighting device (1) further comprises a control unit (5) for adjusting the color of the light emitted from the lighting device by controlling the power supplied to each one of the LEDs (2a - 2h) in correspondence to the movable member (3), and by controlling the total power supplied to the lighting device (1) independently from the power supplied to each one of the plurality of LEDs (2a - 2h).

Description

technical field [0001] The present invention generally relates to lighting devices with enhanced color spectrum or adjustable color spectrum. Background technique [0002] Light emitting diode (LED) lighting fixtures are a rapidly growing segment of lighting fixtures, which have the advantage of providing high lumen output per unit of energy due to their high efficacy. Additionally, LED lighting fixtures are durable and robust, which contributes to the environmental advantages of LED technology. [0003] One of the shortcomings of conventional LED technology is that the LED itself typically emits light within a relatively narrow spectrum, thus altering the color of the illuminated surface compared to the perceived color of the daylight-lit surface, which is often taken as a reference . [0004] Various solutions have been proposed to enable lighting devices based on LED technology to better simulate daylight, ie to increase the spectral content of the emitted light. These...

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
IPC IPC(8): H05B33/08F21S10/02G02B26/00F21S10/00H05B44/00F21V9/40
CPCF21S10/007F21S10/02G02B26/008F21K9/64F21K9/65F21Y2115/10F21Y2113/13F21V9/45H05B45/20F21V29/74F21V14/08F21Y2115/30
Inventor A·J·S·M·德瓦安
Owner SIGNIFY HLDG BV
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