Various Type of Visual Displays – Information Display (with diagrams)!
1. Quantitative Displays:
These display information provides information on a variable's numerical or quantitative value. It can be either dynamic or static (i.e. time change, such as pressure or temperature). Quantitative displays are typically used with mechanical indicator type.
A pointer such as a plane's location on a screen is the movable part. In some situations, the blood pressure measurement instrument is a liquid column. The scale is the moving part of some devices and the pointer is fixed.
The digital counter display is better suited for fast and accurate numerical readings. These are now used more and more for digital watches and calculators, for example. When comparing the relative advantages and disadvantages of a fixed pointing point and a fixed-scale type, the moving pointer type gives us a sense of quantification not for moving-scale forms of measurement.
The distinct advantage of the moving scale type design is that it occupies less panel space since the entire scale need not be displayed and only a small portion just against the fixed would serve the purpose. Some arrangements with quantitative visual displays are illustrated in Fig. 9.9.
Special features of quantitative displays which are significant are the least number of this size, scale markers, numerically used development, the form of pointer and lighting.
2. Qualitative Displays:
They provide information on a limited number of discrete variable states. These shows demonstrated qualitative data i.e. immediate (in most cases approximate) values for certain variables such as pressure, temperature and speed, etc., that change constantly.
We can thus be called contextual, complex visual displays. For example, we have hot normal and cold ranges for moving cars for temperature quality. The Fig. The Fig. 9.10 indicates that three areas with low, safe and unsafe speeds are usually marked with different colors on a automobile speed meter to distinguish between speed areas.
3. Other Type of Displays:
Although many other types of displays necessary to certain specific purposes are used, commonly used displays are pictorial displays and auditory displays as described below: In addition to qualitative displays:
Pictorial Displays:
A good pictorial display will easily show the object. Photographs, radarscope on TV, flow charts and diagram. For example. The aim of the display is to make the display as simple as possible, because many artifacts appear to confuse the viewer.
The connection between dynamic and static or moving objects must be clear and distinct. Graphs and charts are sometimes a really realistic way to display images. Cathode ray display style is also an excellent and convenient technique to provide visual pictorial details.
Auditory Displays:
The human sense of the hearing, compared with visual sense, is not so sensitive but has certain characteristics that make it highly appropriate to receive information.
It possesses the following abilities:
(1) A very wide range of sounds with different frequencies and intensities can be heard and identified.
(2) It has a wide vacuum and receiving field even more than the head.
(3) Can be fairly accurate in identifying sound sources.
(4) Can detect from noises the required / wanted sound.
(5) Many sounds can be heard from the ear and only one can listen to desire.
Thus as compared to visual display, the auditory display is preferred when:
(i) In case of simplicity, shortness of knowledge and no reference is required.
(ii) When, depending on the time and immediate action needed, details are focused on eventualities, for example, the bell to call the peon.
(iii) When the place of origin is unable to visually display, e.g. give the correct instructions on earth moving machinery in a field.
(iv) Given its nature, there is no option to auditory presentation at all times, the operator can not stand in front of the display panel.
(A) Classification of Auditory Displays:
Two modes are used for auditory presentations, i.e. the use of sound signals in one modes and the use of other sound signals. Both are appropriate for two knowledge groups in the district.
They should be utilized as per requirements as follows:
(1) In the case of a simple message and well qualified to interpret the particular signal, the noise mode can be used. It can also be used if there is no objective meaning to the information and only offers a certain state of operation at a certain time.
(2) Noise signal can be used if conditions are not appropriate for speech communication, for example if the signal is only for a single person, and it is not desirable during hearing. Contrary to this presentation of the speech it is better if the information is accessible and the audience needs to identify the source for the necessary action.
(3) If communications are necessary in two directions.
(4) Some common audition displays and their important design features are the following when the information is acted on at a later stage:
(i) Horns:
They can produce a sound that is high in amplitude and that can be easily noticed. We are built in a specific way to carry the sound.
(ii) Whistle:
It generates a high intensity, sound that attracts attention very easily if it is below intermittently.
(iii) Fog horn:
It also creates a sound similar to horns, which makes it impossible to penetrate the signal from these horns with low frequency noise.
(iv) Buzzer:
It can catch your attention in the neighboring area because it produces a medium-intensity sound.
(v) Bell:
A bell can create a sound of medium intensity that can be heard above and beyond the low frequency.
(vi) Siren:
It provides a strong warning signal if the sound pitch is increased and decreased because it generates a sound of high intensity. It is also used as a very good clear signal when it sounds at the same pitch continuously.
