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| Question | Answer |
| What are piexoelectric crysals? | The controll method in printer. The expand and contract when curent is passed along them. Can convert between physical and electrical signals. (vibration & tention) |
| What are thermo cromic liquid crystals? | Crystals that react to temperiture and change colour. |
| Why are Thermochromic crystals usefull? Where are they used? | Thyey can show tmperiture changes using colour aids. Thermomiters, pizza boxes, beer cans (course light) |
| Why are piezoelectric crystals usefull? Where are they used? | They controll the amount of ink released into a printer by expanding or contraction gdepending on the curent passing through it. |
| What is smart ink? | Display technology that mimicks the apearence of ordinary paper printing. (kindle in colour) Reflects light rather than just project it. |
| Whaty is smart ink usefull for? Where is it used? | Used to overcome ristrictions of computer monitors. Being developed for ebooks. |
| What is radio frequncy identification. (RFID) | Tags in shops have internal systems that can be used for identification using a reader. Used to track paletts of prodicts from manufacturer to retailer. |
| What is a smart material? | They respond to light or tempriture and change because of it. They seem to have a 'memory' so will revert back to how they were before when input is removed. |
| What are phosphorescent pigments? | 'After Glow' / glow in the dark materials that absorb energy in daytime and release it overtime as light when in the dark. |
| Why are phosphorecent pignments usefull? Where are they used? | They can be seen in compleet darkness. Safety signs and watch faces. |
| What er Liquid crystal displays? (LCD) | Organ, carbon compounds. Has liquid and crystal properties. Low energy and curent uses. |
| Why are LCDs usefull? Where are they used? | They take a very low amount of curent to run them. Ideal for portable screens; mobile phones. |
| What is Elecroluminescent lighing? | A voltage crossed over electrodes to make a continuouse light. (the Sony sign) |
| Why is elecroluminecint lighting usefull? Where are they used? | Low power consumption. Waterproof, reliable and highly visible. Used as phone backpight and in advertising displays to make an impact. |
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