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Lighting system and methods for reducing noise at light sensing device

A lighting system, light sensing technology, used in lighting and heating equipment, lighting fixture components, lighting fixtures, etc., can solve measurement errors, reduce lighting system operation and performance problems, etc.

Active Publication Date: 2016-05-04
PHOSEON TECHNOLOGY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the light reflected from the light-sensitive surface back to the LED array and photodiode (referred to here as retro-reflected light) is sensed by the photodiode, it can cause errors in the measurement of the emitted light
Also, placing photodiodes in close proximity to the LEDs (e.g. directly on the LED array) makes the lighting system very susceptible to retro-reflected light, greatly degrading the operation and performance of the lighting system
Also, when the control of the LED array is based on photodiode measurements, measurement errors caused by retroreflected light at the photodiodes can cause lighting system control problems

Method used

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  • Lighting system and methods for reducing noise at light sensing device
  • Lighting system and methods for reducing noise at light sensing device
  • Lighting system and methods for reducing noise at light sensing device

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Embodiment Construction

[0016] The present description relates to a method having a light emitting device comprising one or more light emitting diodes (LEDs) and light sensing means (eg photodiodes). figure 1 is a block diagram of a photoreaction system 10 including a lighting subsystem 12 , a controller 108 , a power supply 102 and a cooling subsystem 18 . The photoreactive system may also include at least one light emitting device (eg, LED array 20 ) and at least one light sensing device having one or more light sensing surfaces. figure 2 An example of a lighting system is shown, the lighting system includes a light emitting device (such as an LED array 20) and a light sensing device, the light emitting device emits light energy generally along a first axis direction, the light sensing device Positioned or oriented generally along a second axis that is orthogonal to the first axis. image 3 An example of a circuit that monitors photovoltaic current and applies a variable forward bias potential to...

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Abstract

A method may comprise: supplying light energy from a light emitting device principally along a first axis; sensing the light energy with a light sensing device oriented along a second axis, wherein the second axis is oriented substantially orthogonally to the first axis; and adjusting the light energy in response to the sensed light energy. In this way, an amount of retro-reflected light incident at the light sensing device may be reduced, measurement error of the light sensing device may be reduced, and control precision and reliability of the lighting system for curing a work piece can be increased.

Description

[0001] related application [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 068,552, filed October 24, 2014, entitled "LOW-FEEDBACKLED POWERMONITOR SYSTEM," the entire contents of which are owned by all Purposes incorporated herein by reference. technical field [0003] The present specification relates to systems and methods for increasing the efficiency and effectiveness of lighting systems including light emitting devices and light sensing devices. Background technique [0004] Curing of a photosensitive surface includes monitoring the irradiation of irradiating light emitted by a solid state lighting device, such as a light emitting diode (LED), onto the photosensitive surface to verify the operation and performance of the lighting device. Typically, the lighting system includes a light sensing device (eg, a photodiode) positioned as close as possible to the LED to detect the maximum amount of light emitted from the solid state lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V23/04F21V13/04H05B33/08B41F23/04F21Y115/10H05B44/00
CPCB41F23/04F21V13/04F21V23/0442H05B45/00H05B45/12H05B45/345
Inventor G·伊莱亚森D·奇尔德斯G·麦肯齐
Owner PHOSEON TECHNOLOGY INC