Ciehk 2013 course dynamic white applications with leds 23 05 2013

DYNAMIC WHITE APPLICATIONS WITH LEDS

Kelon, Kam Kong YAN Manager, Lighting Engineer Lighting Division

Importance of Light to Human nature 1/ FUNCTION OF LIGHT

Visual Function Illuminates spaces and objects

Biological Function

Psychological Function

Supports biological rhythm

Defines moods and ambiances

Stimulates and motivates

Relaxes and inspires

Kruithof Curve

PLEASEING ILLUMINATION REGION

The contents of light Light and shade (Contrast) Strength of light (Intensity)

Changes of colour (Colour temperature)

Movement of light (dynamics)

Changes of brightness (Dimming) Reflections Glare

Rhythm of light (flash)

Lighting effect (diffused/intense)

Definition of “Dynamic White”

Changes of colour (Colour temperature)

Strength of light (Intensity) Changes of brightness (Dimming)

Rhythm of light (flash)

Movement of light (dynamics)

Within specific colour temperature, which is generally percieved as “White”…

By changing the brightness with dimming system, we control the intensity… … within these changes, time is consumed… that creates rhythm even hardly notable…

A combination of the above creates light dynamics, appear to be light movements in human eyes

Light intensity

Light Intensity

Light intensity is how we regconise time. During a day, skylight evolves its itself by dimming up & down, that triggers our daily activity & control our regconition of a day. Human had been depending strongly on daylight to seize time for activities. The intensity of daylight master our daliy rhythm.

Light Intensity Light intensity & the Sun

The closer the angle the sun strikes the earth are to 90 degrees, the more energy is received. Meanwhile there are factors that affect the intensity of light: - latitude of location - altitude of location - air pollution - cloud cover

Light Intensity Light intensity & human circadian cycle

Light Intensity Important value of Dynamic White - 1

Light Intensity Important value of Dynamic White - 1

Light Intensity Important value of Dynamic White - 1

Light Intensity Light intensity & Human response The drop of skylight intensity leads our emotion to drop from

Focused Energetic Soothed Relaxed Calm Melancholy ‌ Depressed

12:00-14:00 14:00-15:00 15:00-17:00 17:00-19:00 19:00-21:00 21:00-23:00 03:00-05:00

(omit colour temperature)

Total lack of efficiency 00:00-02:00 ‌ 02:00-03:00 Depressing hours & more suicides 03:00-04:00 Born or dead hour 04:00-06:00

Light Intensity Light intensity & Human response

Under cloudy sky, skylight intensity drops, we mostly feel inactive & moody.

Light Intensity Light intensity & Human response

All in a sudden when the clouds are gone, skylight intensity increases in a sharp pitch.

What we feel is we focus again & tireness removes.

Light Intensity Light intensity & Proven facts

Light influence on specific biochemical processes within our body. Our nerve and endocrine “translates” light stimulating messages for the nerve system. Depending on its intensity, light can either have an activating or a calming effect. This explains why most of us feel lively and fresh during a sunny day and rather tired during a cloudy day.

It also why our biological clock is closely connected to the daily cycle of day and night, or why some people experience seasonal mood variations.

Closed rooms, such as examination rooms and those used for medical interventions, mostly lack adequate stimulating light putting both patients and health care professionals into a kind of “biological darkness”.

Light Intensity Light intensity & control

By understanding how human response to light intensity, we can master the quality of a defined space, for example we can: -Brighten up a room in dark winter days to Lift up moods -Sustain high light intensity period to Increase productivity -Extend lights-on hours to Allow longer shopping hours -Lower light intensity to Decrease level of tense -Practise different light intensity in a defined space to separate areas of focus

Optimising the light intensity control can uplift our living quality definitely.

Colour Temperature

Colour Temperature

“The truth is, that color affects us physiologically as well as emotionally.�

Angela Wright, British color psychologist

The effect of colors Colors have an impact that by far exceeds purely aesthetic concerns.

Since colors stimulate our nervous system, they are able to influence mood and provoke reactions. The use of color can be exploited to make an environment less intimidating, and situations or procedures to become less anxiety-provoking. Less anxiety and a more positive mood may translate into a better physical state for better & faster recovery.

Colour Temperature Colour temperature & Emotional response

Green is the most reassuring color.

It creates a feeling of stability , but only when used in soft tones.

Orange is a strong stimulus.

It is very sensual, but also contributes to activity.

Red symbolizes activity and passion; it can also stimulate appetite.

Pink is the color of feminity and has a physically soothing effect.

Purple can provoke a feeling of spirituality, but may be perceived very differently – positively or negatively – by different people.

Blue has a mentally calming effect and serves perfectly to sooth anxiety, especially when warmer tones of blue are used.

Colour Temperature What is Colour temperature As colour is closely linked to mood that causes psychological reaction, color temperature of light is critical.

Higher color temperatures (e.g. 5000K or above) are perceived as “cool” (blue and green tones)

Lower color temperatures (e.g. 2700-3000K) appear to be “warm” (yellow and red tones)

(Colour temperature in Kelvin’s Scale) (Chronmaticity Diagram)

Colour Temperature What is Colour temperature As colour is closely linked to mood that causes psychological reaction, color temperature of light is critical.

Delivers an energising effect

Keeps you relax

(Colour temperature in Kelvin’s Scale) (Chronmaticity Diagram)

Colour temperature & Circadian Rhythm

Colour Temperature Changing Within a Day

Colour Temperature Changing In Indoor Area

Importance of Dynamic White

Our bodies are affected by the rhythm of night and day. The dynamics of daylight sets our biological clock and influences our sense of well-being. Dynamic Lighting makes us feel good by bringing those dynamics indoors. People can control their own space according to their needs, mood and task, creating exactly the right atmosphere to improve performance and motivation.

Importance of Dynamic White

Bringing the benefits of daylight indoors The rhythm of day and night, the seasons and the weather create ever-changing light scenarios during the day. Dynamic Lighting is an advanced solution that brings the dynamics of daylight indoors. It creates a stimulating, ‘natural’ light that enhances people’s sense of well-being.

Importance of Dynamic White

褪黑激素

松果體會在黑暗的 情況下才會製造褪 黑素

缺乏褪黑素被認為 很可能是夜班工作 者得癌病的成因， 而現代於晚間亮燈 的習慣亦被認為是 發達國家越來越多 人得癌症的原因之 一

Colour temperature for Dynamic White

The making of Dynamic White The change of colour temperature and light intensity is achieved by mixing the light output of two different lamps using dedicated optic technology.

One lamp has a colour temperature of 2600 K (warm white) and the other 5600 K (cool white). Changing the light output of the lamps means the colour temperature can vary seamlessly between these two values.

Different Colour temperature with Different White Tone

Colour temperature for Dynamic White 2500K

As known as the Kevin’s Scale

6500K

Other Applications

Nowadays coloured LED lighting equipments can achieve accurate colour tuning, in both static & changing effect. More then that, time schedule design controling the speed & rhythm of each change could be done by various lighting control system.

Lighting design with the above elements are most commonly found from hospitals for better medical quality, in shopping arcades enhancing shopping moods, in light art studios, even domestic lighting products are designated for compact environment to create moods upon personal preference.

Other Applications

Where to use?

-Offices

Adjusting lighting to stimulate productivity at different hours

-Classroom

To relax over excited emotions & lift concentration

-Conference hall

To stimulate rapid thinking & interactions

-Museum Lighting

Themes upon changeable exhibits

-Jewelry lighting

Lighting with luxurious products which are classified by slight colour different

-Display Case

With all possibility of exhibits

-Retail shop

With seasonal displays

Applications Dynamic white lighting in offices

Applications Dynamic white lighting in offices

Applications Dynamic white lighting in offices

Dynamic office lighting Biologically effective, dynamic office lighting ensures that employees feel more alert and are more productive, especially in areas of a room or building that are not served well by daylight.

That is the finding of a current study in an open plan office, in which employees performed four-week work stints in different lighting atmospheres.

Dynamic office lighting: Taking a leaf from nature, light colour, illuminance and direction of light change over the course of the day. In the morning, they are set to promote concentrated work.

In the early afternoon, higher illuminance helps counteract the performance.

In the late afternoon, a warm light colour and low illuminance eases the transition from work to leisure at the end of the day.

Applications Dynamic white lighting in offices Lighting atmosphere over the course of the day -luminaires providing both direct and indirect lighting -control lighting -standard-compliant 500 lux illuminance -colour temperature of 4,000 kelvin -direction of light changed dynamically during the course of the day. (Like sunlight, the light radiated by the system was direct in the morning, became more diffuse at midday and then increasingly direct again in the afternoon.)

-3,000 kelvin warm -indirect luminaires -8,000 kelvin cold white -energising light in the morning -warm, subdued light in the evening -At the time human performance slumps in the early afternoon, the illuminance surged to as much as 1,000 lux. Between 1.15 and 2.45 p.m., the colour temperature also rose – to around 8,000 Kelvin –

Applications Dynamic white lighting in offices

CASE RESULT -Employees feel better and more alert -subjective impressions of participants -biologically effective lighting has a positive effect.

-Office are measuably more productive.

-Higher illuminance at certain points and dynamically changing colour temperatures impact positively on concentration, continuously throughout the day.

Applications Dynamic white lighting in hospitals

Applications Dynamic white lighting in hospitals

“Every hospital is the same.

I think there is one architect that designs all of them and just spews out the same design each time. They all have an over abundance over fluorescent lighting around every corner. Desaturated and sterile colours that make me feel uncomfortable They feel like places where you will be a test subject.

There is no personality because of the lack of colour and the blandness of it all. The lighting is irritating and and bright keeping you on constant alert.�

Applications Dynamic white lighting in hospitals

Applications Dynamic white lighting in hospitals

Applications Dynamic white lighting in hospitals

Applications Dynamic white lighting in hospitals

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Original setting -

A standard 500lx falls on each table Direct downlight from the ceiling Weak ambience lighting with medium light & shade contrast Light illuminating whiteboard

Applications Dynamic white lighting in schools

Advanced setting -

Added light Direct & indirect downlight from the ceiling, suspended Evenly distrubuted ambience lighting with lower contrasts Adjustable light illuminating whiteboard in well distance

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in schools

Applications Dynamic white lighting in retail

Warmer colour temperature in changing area creates intimate & personal feeling.

A cool white colour with strong intensity calls attention on merchandises‌

‌ high colour temperature also allow fine details of garments to be seen.

Different tint of colour blended into White Light enhance brand image, in a subtle way.

The use of Dynamic White & RGB give pure colour colour a lighter saturation, relaxing spirits & reduce the speed of sales activities, retaining customers for longer stays.

Warmer white light reduce tense and create cheerful pruchasing mood.

Use of multi colour temperatures differenciate focal area from the generic atmosphere.

‌ intensity also bring the same effect

Adjusting mood accord to seasonsStimulate sales & tuning purchasing moods

Changing colour of white light refresh the feeling of an atmosphere, at the same time adjusting to particular purpose throughout the day.

Shops may apply yellow & white light to distinguish different zones.

‌even possible by just one illuminating system.

Other applications Dynamic white lighting in retirement home, industry & home

Applications Dynamic white lighting in retirement home

Applications Dynamic white lighting in retirement home

Advantages of Dynamic White lighting in Retirement home -Regulate sleeping disorder (Circadian rhymn) -Allow easy atmosphere for medical care & treatment -Reduce stress & depression

Other applications

Other applications

How is white light generated?

White light

Additive colour theory, R + B + G = W

White light

Creating Dynamic White light Method 1: Duo fluorescent tubes

Traditional DW by Fluorescent

The change of colour temperature and light intensity is achieved by mixing the light output of two different lamps using dedicated optic technology. One lamp has a colour temperature of 2600 K (warm white) and the other 5600 K (cool white).

Changing the light output of the lamps means the colour temperature can vary seamlessly between these two values.

Creating Dynamic White light Method 1: Duo fluorescent tubes

Creating Dynamic White light Method 1: Duo fluorescent tubes

Creating Dynamic White light Method 2: RGB addictive method

DW by LED RGB technology

Creating Dynamic White light Method 2: RGB addictive method

Creating Dynamic White light Method 3: White LED by phosphor

DW by LED Phosphor technology

Creating Dynamic White light Method 3: White LED by phosphor

Creating Dynamic White light Method 3: White LED by phosphor

Creating Dynamic White light Method 4: LED phosphor, multi-dice single chip

DW by LED Phosphor technology (Multi-dice single chip)

Creating Dynamic White light Method 5: chromawhite technology

DW by chromawhite™ technology (Integrated with LED Module) ChromaWhite provides the illumination quality of the sun (and incandescent lighting) with the energy efficiency (and lifetime) of white LEDs. ChromaWhite is dynamic, colour tuneable and controllable to simulate the qualities of daylight and conventional light sources. It represents a revolution from the on/off fixed colour lamps of today.

Creating Dynamic White light Method 6: OLED, the future of Dynamic White lighting

OLED, colour changing by voltage Scientists create OLED lighting panels that can change color temperature to match sunlight throughout the day Scientists from the National Tsing Hua University in Hsinchu, Taiwan, designed an OLED that can display color temperatures between 2300K and 8200K - covering the entire range of sunlight during the day. The color temperature is controlled using different voltage.

That's the first time this has been achieved - and no other light source can have that kind of color range. They used fluorescent OLEDs, but plan to switch to phosphorescent, to make it more efficient.

Creating Dynamic White light Method 6: OLED, the future of Dynamic White lighting

Creating Dynamic White light Method 6: OLED, the future of Dynamic White lighting

Creating Dynamic White light Method 6: OLED, the future of Dynamic White lighting

Application of OLED Method 6: OLED, the future of Dynamic White lighting

Application of OLED Method 6: OLED, the future of Dynamic White lighting

Application of OLED Method 6: OLED, the future of Dynamic White lighting

Conclusion – Dynamic White Lighting

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Dynamic White

Fine-tuning the colour of White

Colour

intensity x x Light Dimming

Timing

Dynamic White OF Fine-tuning the colour of White 1/ FUNCTION LIGHT

Visual Function Illuminates spaces and objects

Biological Function

Psychological Function

Supports biological rhythm

Defines moods and ambiances

Stimulates and motivates

Relaxes and inspires

Dynamic White

Fine-tuning the colour of White

Dynamic white, bringing the Nature to you.