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Vacuum Fluorescent Display (VACUUM FLUORESCENT DISPLAY)
is developed from a vacuum tube display device, the cathode by the launch
of the electronic (direct thermal, collectively referred to filament)
and speed up the gate control of electron flow, will be printed on glass
substrate electrode and fluorescence powder and the anode grid and the
glass cover pose. It impacts the use of electronic phosphor, so that light-emitting
phosphor is a self-luminous display. Because it can do more than color
display, high brightness and low voltage can be used to drive and easy
with the integrated circuit package, which is widely used in household
appliances, office automation equipment, industrial instrumentation and
automotive and other industries.
Right is a common type VFD screen several fields, in general, need to display a variety of electrical and display the contents of the style is different, so VFD that are customized to customer requirements. This custom electrical equipment need to take into account the need to show which state the amount to be shown what kind of, what color, how the entire display area, VFD screen side of the pin a single home or at home on both sides and so on.
Field-type VFD screen is relatively simple, relatively
cheap price, you can design a variety of colorful graphic symbols, but
this design once set to open after the mode of production, display information
on the relative change, not to change. As a result more suitable for mature
conventional household electrical appliances, such as VCD, DVD. However,
for some of the more cutting-edge products, product research and development
in a constant updating of Health level, the typical information appliances,
some products, the core of the entire software product, sometimes the
software functional response to the software interface and then react
to the VFD display to be more than a symbol or logo displayed on the VFD
screen type field must be re-opening mode, the cost is relatively high,
relatively long processing cycle can not meet the requirements. This can
be considered when dot-matrix VFD screen, on the greatly increased flexibility.
Dot Matrix VFD common specifications are 128 * 40,160 * 64 and so on,
need to show more flexibility on the contents of the.
The photo shows a belt of the fields in the font display screen (the dark night is take pictures). There are two features, first is the chinese "ė"can display fonts of numbers and letters, and the second is a screen display with a wide range of colors, such as red, green, blue and yellow and so on. In general, the display content to consider the following: a variety of working conditions such as Play / Record, etc.; volume display; a number of figures such as music; six figures show that when the minutes and seconds; key word if the meter can display letters and other symbols, further enrich the content. Can be seen that seven figures is a more common choice.
The photo shows a band of nine field-shaped display screen. There are two features, first is the meter can display fonts of numbers and letters, up to 9; the second is a screen display with a variety of colors; the third is new information for some types of equipment specially designed home appliances.
Dot-matrix display is calculated by pixel, each pixel can be arbitrarily controlled, so that it can display more content-rich, such as symbols, numbers, letters, characters or pictures, etc., often display a very high specification, such as 112x16, 140x16, 128x32, 160x32, 140x32, 128x64, 256x64 and so on, can display the contents of products have to be the number, select the size of screen. The chart below is a picture 140x32 dot matrix display (real pictures).
Usually consider a screen, need to look
at the following aspects: the external dimensions, display area size,
display, drive interface. VFD front of a board is concerned, usually the
following aspects of the interface:
The next photo shows a typical dot-matrix VFD screen size map, dot-matrix pixels 80x16, can show two lines of 16x16 characters, 5 characters per line.
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