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Exam answer - Essay Example

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The switches of the key are connected through a printed circuit board in an electrical X-Y matrix.
The keyboards are usually illuminated from the…
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Download file to see previous pages This a special type of field-effect transistor that is made by depositing thin layers of an active semi-conductor and dielectric layers contacts over a supporting substrate that is commonly glass.
c)OLED: organic light-emitting diode. It is a LED where in response to a current, the emissive electroluminescent layer which is a film of organic compound emits light. OLEDs are used in the creation of digital displays in TV screens as well as computer monitors.
Figure 1 shows the occurrence of visual distortion when anti-aliasing it not used. The image is hard to recognize, and it is not appealing. In figure 2, the edges appear smoother. Anti-aliasing is used in the blending of the pixels of a graphic. As s result, it is applied in rendering the text on a computer screen have a smooth contour for easy visibility.
4.Technology: many public-use touch screens such as kiosks make us of projective capacitive touch since it is a representation of only a flat glass surface. This assists in cleaning along with aesthetics.
6. It is almost impossible to accurately approximate the contrast ratio of the monitor by making use of the naked eye. As a result, the manufacturers usually inflate the numbers to some unrealistic values.
The saturated colours are generated by having full or zero reflectance at any given wavelength. In the CIE chromaticity diagram, the U-shaped area that is surrounded by the dotted lines shows the range of colours that are visible to the human being’s naked eye.
9. A radiance meter measures the amount of light given off by a source. As a luminance, one needs to adjust the levels of light to the source as well as the whole surface area of the source of light. As a result, the value that represents all the light that is given off at a particular time.
As chrominance meter, adjustments need to be made so that the meter would only detect specific ranges of wavelength and establish their values independently. This is because the white light emitted ...Download file to see next pagesRead More
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