OLED Technology

History - It dates back to the 1950'6 where researchers at the University de Nancy France produced electroluminescence in organic materials by applying a high voltage ac to crystalline thin films. DOW Chemical Co. followed in the 1960's. it is generally acknowledged that Kodak discovered the first diode OLED in the late 1970's.

Possible Uses - Advancements have been made since then by Kodak and many other companies. the development of P-OLED's light emitting polymers that can be used for display screens with a wide range of colors used for information management, communications and entertainment. Other applications i have read about are the possible uses illuminating room switches, desk drawers, interior lighting on vehicles and underwater lighting. For us underwater lighting would be important because our signage has to be able to withstand forces of nature.

An interesting lamp design by Makoto Tojiki named the Archimedes Dream, is quite cool in showing the luminescence it has to offer, but it seems that it would need to be dark for its glow to really show through.

Lifetime - Some of the products from Cambridge Display Technologies can last from 25,000 to 400,000 hours depending on the amount of cd/[m.sup.2] used. (i am not sure what that means, but i think its a way of measuring how strong the light is, i will be looking further into that)

Part of the problem with flexible OLED technology is that the lifetime of it isn't very long. as seen on youtube videos, they get glitches of lines running horizontally and vertically. although it is a cool technology but it is not as ready for the market as non flexible ones.

Market - Some market research predicts that it will be a 1.1 Billion dollar industry by 2015 for being used for many applications and some Government Funded R&D projects. This is the NEXT BIG thing. In my research, there are several big companies trying to get a handle on this technology for its possible wide use.

Efficiency - The reason why it is so efficient is because it uses no backlight. Most LCD screens need to have a backlight and work by blocking out spots on that backlight to produce the desired display.

With OLED technology, the diode just lights up in its proper place. It is for this reason that you can achieve extremely energy efficient and ultra slim designs.

Take for example Sony's path on using OLED technology for TV Screens. Some that were displayed at a show were 10mm thick for a 27" and 3mm thick for the 11" tv's. They have a 1,000,000 to 1 ratio meaning that the black is the blackest of black, and the white is the whitest of white color, with every color we can possibly see in between.

One way to achieve brighter colors is to double stack OLED displays on top of each other. Universal Display Corporation did this and was able to provide a device that achieved 102 Lumen per Watt. But it was a white light and not some of the other colors we will need.

let the sensor count people & conrol the traffic light IMPORTANT

also works with light
technical info:
- direction based counting of people
- can not be confused through objects in the back
- can not be confused by bad lightning situation
- you can control the counting intervals

in general:
so i was thiking about sensors and researched different kinds and in the end i was thinking why not let the sensor control the traffic lights.
i mean they can count with those induction loops how many cars are in which area waiting and this sensor can count people.
so why not put those info together and let the sensors decide which groups gets green light first?
i was thinking a little further and then i found this site (german!)

http://derjulian.net/lt_bak/pages/doku#a1

where they already invented a system which works with infra red sensors and a priority system.
its goes like this:

area 1: 3 people waiting for 60 seconds
area 2: 2 cars waiting for 30 seconds
area 4: a police car waiting

police car, ambulance etc = always prefered with value 999

car linked to time waiting => 10 seconds of waiting = value 20
30 seconds = 40
60 seconds = 70

pedestrian also linked to time waiting => 10 sec of waiting = value 10
30 sec = 20
60 sec = 35



according to this, the police car is first.
2. pedestrians (3x 35 = 105)
3. cars (2x 40 = 80)

i mean this is just an example and u can change all the values and change your priorities.
but it works simple with infra red sensors at different spots and i really think that could improve
the situation because nowadays there are fixed waiting periods for all members no matter if there are any cars or not.
i think this is very important and we should include this thought.

smart eye sensor for streets

works for:

- counting cars
- measuring speed
- works parallel for up to 4 traffic lanes

with this data you can find out about stuff like average speed of a street,
how many cars per day ( no students counting cars a whole day anymore!) and
whatever you would like to find out about a street.

it works with change of light or something.

induction loops as so called "old fashioned sensor":)

this is an example of magnetic fields of a plane.


you know in germany at many intersecions there are those induction loops on the street.
they control the traffic lights at night mainly.
- they work with electricity and react to the metal in cars that change the voltage.
- they register cars and change the traffic lights.
- if u put such an induction loop behind the stop line at an intersection you can register and
track knowing violation against red lights.
- if u put two of those at one certain place u can recognize the type of a car and its speed!!
- they work under every condition


i think its so simple but effective. i like.
they are trying to install those sensors on the frankfurter airport.

Sams View on the Mission Statement

Our Mission is to provide better communication between drivers and pedestrians via smarter traffic signals and crossing signals. Through better design the patience of the pedestrian can happen to decrease accident rates at crosswalks.

The Physcology of Patience

Pedestrians think they are so important that they can't wait for something for a few seconds without getting upset or angry.

Clearly, without patience we will learn less in life. We will see less; we will feel less; we will hear less. Ironically, "rush" and "more" usually mean "less." The pressure of "now," time and time again, go against the grain of the gospel with its eternalism.

Patience is indeed a skill. Many people never seem to learn patience, but everyone can learn it if they try. Patience means being able to wait for something without getting upset or angry. Most people who are patient think about other things while they are waiting, or find something to occupy their minds instead of worrying.

In an article about pedestrian patience it seems as though giving the pedestrian control (in the form of a self operated cross button) does not make them more patient, rather the pedestrian feels that by pushing a button results should be instant and proceed to cross the street without caution:

Among the new crossings that made it past the Ministry's watchful eye in this period were two across dual carriageways in Swansea, a town which had only had Zebra Crossings until then. The local newspaper ran a lengthy article about it, in which their "own correspondent" visited one and detailed his findings, under the headline "New Lights Give Lesson in Patience".

"I pressed the button on one of the pedestrian crossing standards today...and observed certain results. The traffic continued to pass for several seconds.

"Some people who apparently expected the 'Cross Now' signal to appear as though at the turn of a switch, made as though to dodge across the road until a waiting policeman gently chided: 'Now, wait for it.'

"Then the traffic stopped, the 'Cross Now' appeared for 10 seconds and we were all across the road." - http://www.cbrd.co.uk/histories/pedestriancrossings/3.shtml

This article is actually about pedestrian patience...but it's really stupid and the only conclusion it makes is: "life is too short...lets all slow down" yea...ok.


!!!!READ THIS ARTICLE!!!!! "Studies show that as wide roadways become more congested, pedestrians are more likely to get hit in marked crosswalks than in unmarked crosswalks." http://voices.washingtonpost.com/getthere/2008/08/the_future_of_pedestrian_safet.html

Hey gruppe,
Here's my statement and my preliminary LED research. As far as the LED research goes, I wanted to give you guys an idea of where I was going. More to come on Thursday. Are we skyping? Remember, Sam, Monica, and I will be reviewing our preliminary research and statements together tomorrow (Wednesday) afternoon. We will review each others' work and make sure that each person is focusing on the correct stuff. As far as the statement goes, we will combine, revise, and publish here on the blog. Germans: please give us your feedback and edits as well. We want to make sure that everybody has a say in the mission statement so that we can continue to have focused product development. Good work, guys!
Talk to you soon!
Thanks,
Rob

Statement:
The primary goal of our "pole" lighting system is to encourage pedestrians to manage their crossing time within an intersection by giving them time elapse information. This information will allow them guage their ability to cross the street before cars invade their zebra stripes. Conversely, this system discourages the pedestrian from taking the risk of crossing the street during cars' right of way by counting down the time until he can cross safely. The pole's secondary function is to alert pedestrians of partial right of way during cars' turning rights.

LED Research:

The ideal system: Waterproof, flexible LEDS. Cons: not bright enough, might not have the colors we want.
http://www.oznium.com/thin-waterproof-ribbon

A VERY bright option. Can we get this in strip form? Is it too bright? Cons: It's by GE.
http://www.plantservices.com/vendors/products/2008/179.html

I think this is the level of brightness we want. But the structure is way too thick.
http://www.ledauthority.com/Color%20LED%20Message%20Centers.htm

PS--sorry about the raw links. I don't know why it won't let me embed them tonight.