Mr. Fullmoon - Multi-function Desktop for WFG

Concept

Aims, Research & Process

Aims

The designed luminaire is fully functional yet aesthetically pleasing. As the designers of Mr. Fullmoon would take careful consideration of the potential glare users may experience, as well as the potential heat dissipation problems.

Mr. Fullmoon would possess a tunable white function whereby the colour temperature can be gradually modified. Recent concerns have been raised about how the human well-being and biological processes depend on the natural light. This could essentially mean cooler tones will be given out to match the existing daylight, and warmer tones before bedtime to avoid disrupting circadian rhythms, therefore simulating the spectral distribution of natural daylight throughout the day.

•Designing a desk mounted luminaire that provides good illumination for faces and tasks

•Targeted for work-from-home users

•CCT adjustable from 2700 to 5100 K

•Identifying warmer temperatures as the night mode therefore improves users' wellbeing + avoid disrupting circadian rhythms

•Manual control - simple and user-friendly

•Height adjustable to users with different monitor sizes

Circadian rhythm regulate functions such as temperature, awareness and immune system activity

Research

•Strong backlighting - appear full shadow on screen

•Top lighting - cast harsh shadows on users' face

•Diffused soft lighting in front of user

•Optimal luminance ratio between foreground (i.e. user' s face) and background (i.e. ambient area) = 2:1

•Maximum illuminance = 500 lux

Step 2 – Design exploration

•The spotlight is above the computer and is slightly higher than the eye level of the user.

•Create a diffused soft light for face illumination without glare by adding a diffuser.

•The direct light from the strip light is perpendicular to the desk, designed for task lighting.

•Height adjustable to cater users of different heights.

Design process

How our design has evolved

Step 1 – Idea generation

Create a luminaire consisting of horizontal and vertical elements, using fabric to create soft light.

•Spotlight - achieve a face illumination with appropriate shadow when the user is in a videoconference.

•Strip lighting - achieve a desk illumination when the user is working on the desk.

•Problem - We had to come up with a way to direct the light towards both the desk and user's face without glare.

Step 3 – Optimisation of design

•Problem: the strip light illuminates the user instead of the working plane (i.e., desk), causing glare.

•Solution: The vertical light is designed into a curved shape to direct lighting distribution towards desk.

•Use LED tape instead of the LED beams can be recessed into the curved part so that the bent downward light emitted by LED tape can directly illuminate the desk.

How colour temperature is perceived differently throughout the day

Technical details

Material, Dimensions and CCT Adjustment

Material

Dimensions (mm)

Lamp Holders or Sockets

Aluminum alloy

The Height Rotation Bearing

Steel

Rotary Dimmer/ Touch Control

Button

Aluminum clad wood

CCT Adjustment

The day/ night mode identified on the rotary CCT controller can essentially indicate the correct colour temperature to be used during the day, and warmer temperatures before bedtime. This can potentially avoid disrupting circadian rhythms, as well as enhance the human wellbeing.

Photometric and Colorimetric Data Components

Light source

LED Dynamic White Module 35 6W 462lm (=50W MR11) Dimmable 24V

CCT Adjustable White Controller

Control Gear

TCI 1-10V Dimmable LED Driver (Constant Current & Constant Voltage) 24V 20W

•CRI >80

•Tunable white: CCT 2700K – 6500K

•Efficacy of 77 lm/W

LumiFlex560 PRO Nichia LED Strip 2 in 1 TW 27006500K 4450lm 24V - Dimmable

•The CCT range – 2500K to 5100K.

•Four-line output ports - by balancing the brightness of two LED strips, different colour can be perceived.

•The built-in memory chip – restored to last used settings.

Diffuser

LED Light Diffusing Opal Acrylic Sheet

• Dimmed from any 0-10V dimming system.

• The input voltage requirement from 110 to 240 voltswidely covers most of the countries in the world.

• The embedded memory - store the brightness level settings during each use.

• The driver supports analogue signal - supports manual control.

Accessories

Universal Adapter

•Glare control.

•Ensure perfectly even lighting.

•Will be applied on the face light and the desk light.

•CRI >80

•Tenable white: CCT 2700K – 6500K

•Efficacy of 115 lm/W

See-through Model & Construction Details Components

See-through Model

A see-through model illustrating how Mr. Fullmoon is assembled. Two 0-10V drivers are installed to ensure each light can be switched on and off individually.

Height

As shown, the diffuser can be smoothly rotated from 0 to 180 degrees, as well as backwards to cater left-handed users. This setting can aviod shadow caused by users.

This is to ensure user comfort and that users can adjust the luminaire according to their own preference.

Control System

Control Mechanism & Circuitry Diagram

User-Friendly Manual Control

Two operating modes: Face mode (A) / Desk mode (B)

Circuitry diagram

Control Mechanism

Touch button A/B controls each light individually. Pushing the button→turn on the indicator light→subsequently turn on face light.

The colour temperature and brightness can be adjusted with the corresponding rotary dials. The adjustments, however, must be the same for both lights. The built-in memory chip stores the brightness level and the colour temperature settings during each use. User friendly→allows users to restore their last used settings.

Different set ups are available according to user preferences. By allowing users to adjust CCT and identifying warmer temperatures as the night mode, this can essentially help avoid disrupting circadian rhythms.

Considering the future possibilities for further adaptations, space is freed up for smart connectivity bridges (Wi-Fi/ Bluetooth). With simple modifications, this luminaire can be linked into the smart lighting network if needed.

Control Interface Mechanism

Each driver and CCT adjusting white controller are linked into the control interface and linked to a master switch mechanically with belt drives, allowing the CCT and illuminance of each light to be adjusted simultaneously. Having identical diameters allows the belt driven master dial mechanism below converts two analogue dials into one single dial mechanically. In a belt drive system, all three dials turn at the same angular, velocity, achieving the effect of dimming or switching colour temperature of both lights at the same time. The rotary dimmer and rotary controller (red square) are outside the luminaire frame for using. These four rotary dials are inside the luminaire.

Face mode (A)

The luminaire is plugged into the

Lighting Distribution

Simulation in Dialux Evo and Visual Effects

Simulation in DIALUX

• CCT Adjustment

In the case of the same illuminance, adjust the colour temperature and observe the change of the spotlight in DIALux.

•The switch controls the adjustment of the color temperature, which can change the color temperature from warm to cool. By choosing the perfect CCT, users can more easily match it with traditional indoor lighting or natural lighting.

• Output Adjustment

The spotlight is turned on with different degrees of dimming from 25% to 100%.

Visual Effects

Under the condition of keeping the color temperature consistent, set the spotlight to any different dimmable levels as required.

•As the dimming level increases, the illuminance increases, and the shadow gradually deepens.

•When the user takes facial lighting as the main task, users can freely adjust the illuminance level by incorporating the actual lighting environment.

Light Distribution

- Polar Curve & Photometric Data

• Intensity measurement method

Using DIALux Evo, we have placed the luminaire on a desk, at the centre of a matte dark room (the reflectivity of the walls, floor and ceiling is set to 0). Having borrowed ldt files with similar properties from manufacturers such as Flos and Linealight, We set measurement points based on the light incident on a plane at a distance of 4 meters from the spotlight, and record the illuminance from 0 to 90 degrees (the light is symmetrical in the horizontal and vertical directions). Having marked the illuminance values every 5 degree, as well as eventually converting them to luminous intensity, we have essentially come up with an intensity distribution.

Both the spotlight and the tape light are turned on at the same time without any natural lighting or traditional indoor lighting.

•A horizontal light from the spotlight.

•The light emitted by a part of the strip light is perpendicular to the table.

•Higher illumination relative to the surrounding environment

Lighting Distribution

Polar Curve & Photometric Data

Polar Curve

Face LED

*Polar curves borrowed from manufacturers Flos and Linealight

The luminance intensity was calculated by distance and the illuminance collected from the measuring point in Dialux, , using the method demonstrated from the previous slide.

The horizontal illuminance of the table and the semicylindrical of user's face when both the spotlight and strip light turn on:

Semi-Cylindrical illuminance contour map of a plane at the distance of 0.5m from the spotlight

The semi-cylindrical illuminance of the plane at a distance of 0.5 meters from the spotlight:

Semi-Cylindrical illuminance values of a plane at the distance of 0.5m from the spotlight

Contextualised Applications Mr. Fullmoon & Home

Figure 1

Figure 3

Figure 2

Figure 4

Figure 5

Fig.1: Both the face light and task light turned on Fig. 2: In idle mode

Fig. 3:In a relatively cozy form where the user is performing some easy tasks

Fig. 4: In a relatively formal situation where the user is in a video conference

Fig.5: when placed on a table, in idle mode