Another feature that has been used as LCD displays have featured more in products is the use of ‘icons’ and pictograms’ Pioneered originally by Xerox photocopiers in the 60s and 70s and used by Microsoft in ‘Windows’ and computer products, the small images illustrating features on menus are easy to read by consumers in international markets. One significant designer who also pioneered their development was Otl Aicher who created many icons and symbols for the Olympic games held in Munich in 1972 and following which many organisations saw their benefit. A walk around any airport will now illustrate the reason why they have become so successful - where else are so many international groups gathered and in need of direction !?
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The BATTERY is a ‘ supply of electrons’ and conducting wire (or track on a PCB - printed circuit board ) links one part of the circuit to the next. A CCD ‘chip’ is a component within the camera’s circuit (the ‘input’ sensor) as is the LCD display panel (the ‘output’). Materials that change light into electricity are part of a group called ‘SMART materials’ ( The LCD display works in a similar way to that seen if we placed groups of 3 different coloured LED components repeated across the area of the display. ) It requires a fair level of current to make it work and is the main drain on the power available within the camera along with the small motors used in focusing and zooming. The unit of the supply of energy in an electrical circuit is the VOLT and the unit of resistance the OHM (W). Components have varying levels of resistance in the circuits and therefore require different levels of current from the power source. -- Remember ‘Ohm’s Law (V-iR) - If you need to know how a Liquid Crystal Display (LCD) works on a digital camera then follow this link.
There is nothing too magical about electronic components in electronic circuits - they each have a particular effect on the flow of electrons in a circuit and use different amounts of current. What is a ‘flow of electrons’ ? Well … that’s what the flow of electricity really is and the rate at which they flow is called the current ( and is measured in AMPS - or milliamps in camera circuits - 0.001 amps = I milliamp ). As far as cameras go its really just a matter of keeping current flow as low as possible and using the improving battery technology to have available the maximum store of charge as possible. Battery technology is improving all the time and the latest cameras - as with the latest phones - will survive for a considerable time on one recharge of the battery.
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The CCD sensor is the array of light sensitive components each of which will contribute just 1 pixel to the final image This takes the place of the film in traditional cameras. The size of this panel and the number of light sensitive sections on its surface are the features of CCD arrays that receive the greatest development attention
Even a very simple circuit like the one shown here shows the parts of a simple system. INPUT PROCESS OUTPUT
from scientists and electronic engineers. Only a few years ago 2 and 3 mega-pixel cameras were available whilst now we are looking at in excess of 30 mega-pixels in professional equipment and this will rapidly move down into the general camera market as prices fall and competition amongst camera manufacturers increases. Battery technology is the other great area of development interest since so many products need to be smaller and more reliable - and also need to power even more features as designers strive to make their products do more than their rivals’ designs.
not see the long-usage times we are increasingly becoming accustomed to.