What waste products do LCD factories have?
Author:Zeng Jiexie Time:2021-08-03 12:27 Browse(275)
Any machine designer always wants to choose the most ideal, high-quality and satisfactory device for his designed products. Especially, the display device used to display information is paid more attention. Because the display device is the face of the instrument, it needs to be beautiful, decent and generous, and it also needs to be able to convey information accurately, clearly and reliably. So designers have to put a lot of effort into this.
Any machine designer always wants to choose the most ideal, high-quality and satisfactory device for his designed products.
especially the display device used to display information has been paid more attention to.

What waste products do LCD factories have?

because the display device is the face of the instrument.
it needs to be beautiful, decent and generous, and it also needs to be able to "convey feelings with eyes", accurate, clear and elegant Reliable information transmission.
therefore, designers need to spend a lot of effort in this aspect.
in practice, it is often unsatisfactory, or even contrary to their wishes. The reason is that they are unfamiliar with modern display devices or lack of specifications in purchase.
this paper tries to integrate the selection and evaluation of LCD devices into a system This paper summarizes a practical specification.
selection principle of liquid crystal display device 1, usage principle.
this is an analysis and selection principle based on usage and needs.
try to give examples as follows: (1) large equipment and control panel.
the basic conditions and requirements of this use are: working indoors.
the ambient light is not strong, the power supply condition is abundant, and the viewing distance is long, It is required that the display should be eye-catching, clear and wide viewing angle.
for this kind of application, it is better to select the active light-emitting display device.
if the passive display LCD is selected, it will not only be difficult to see clearly, The basic conditions and requirements of outdoor instruments are: the outdoor environment light is strong.
under the ultra-high brightness environment in the sun.
the display content can not be washed by the light, to see clearly.
outdoor instruments are mostly portable and small in size, And the power supply is tight.
under this working condition.
generally, active light-emitting devices will be washed by light because the brightness is not as bright as sunlight,The low voltage, low power consumption, thin and flat structure of liquid crystal are suitable for this purpose.
however, the outdoor temperature range is large.
when selecting liquid crystal display, it is necessary to select devices with wide temperature range, even in some alpine regions such as northeast China, It is necessary to design local heating and temperature compensation of driving voltage in order to get satisfactory results.
(3) general desktop instrument.
this kind of desktop instrument has a wide range of uses, many kinds and is mostly used indoors.
the power requirements are general, and external power supply can be used, In terms of function, it can be divided into general digital display instrument and intelligent graphic display instrument.
if we only consider the power supply and ambient light.
the LED and VFD with active lighting will be better, but for the intelligent instrument with complicated functions, it needs to display large capacity of text, graphic information, led and VFD, At this time, it is more appropriate to choose liquid crystal display device.
(4) micro pocket instruments.
there are more and more such instruments.
they are everywhere.
the most basic use environment is self power supply.
therefore, the most basic requirement is micro power consumption. With the development of intelligence and technology, it is necessary to display as much information as possible, Probably only liquid crystal display devices can be used.
of course.
the liquid crystal has some disadvantages, such as narrow working temperature range, and can't see clearly in the dark. However, because the liquid crystal display can meet the most important requirements, this choice is basically correct.
furthermore, we find that.
small instruments that are usually carried on the body, Human body temperature can alleviate the defect of narrow working temperature of liquid crystal display device.
because the instrument is small.
holding it in hand, the line of sight can be arbitrarily reduced, the viewing distance can be changed, the daylighting and viewing angle can be changed, so the disadvantages of liquid crystal display such as unobtrusive and small viewing angle can be greatly overcome.
the temperature of human body can reduce the working temperature of liquid crystal display device(5) Large scale display of fixed information.
mainly refers to weather forecast, advertisement, announcement of airport and station, guide board, etc.
this kind of display area is large.
the ambient brightness is high, and the display content remains unchanged for a long time.
in terms of ambient brightness, the best choice is passive display device in the daytime, and active light-emitting device at night, with reactive power storage function, In fact, no display device can meet the above requirements.
therefore, this kind of application can be selected according to the specific situation. Due to personal hobbies and other reasons, led, PDP, magnetic flap (ball, film, block), El, etc. can be selected, but solid-state liquid crystal film (PDLC) can also be selected, Some new liquid crystal display devices, such as wide viewing angle TN liquid crystal display or multi stable liquid crystal display (mlcd).
although some enterprises at home and abroad have developed some large-scale liquid crystal displays suitable for public use.
at present, they are only for exploring new applications, Liquid crystal display should not be the first choice for this purpose.
(6) large amount of information display.
it mainly refers to computer terminals and TV.
the basic requirements for this purpose are: first, video display, second, colorization, and third, high resolution.
CRT kinescope, liquid crystal display, plasma display, etc. can meet these requirements, CRT is better.
however, if some additional conditions are added to the application.
for example, flat, pocket, portable, energy-saving, digital interface, etc., CRT is not necessarily suitable. At this time, LCD will become the first choice.
2. Different display devices with different circuit principles need different supporting circuits.
CRT analog circuit.
2High voltage up to 10000 V, VFD is suitable for about 20V PMOS circuit and CMOS, NMOS circuit, LED is suitable for 5V TTL circuit and high current CMOS circuit, El needs AC high-voltage circuit (tens of V to hundreds of V), PDP needs AC high-voltage circuit (hundreds of V), LCD is suitable for large-scale CMOS integrated circuit, low-voltage and micro power consumption circuit.
the core of circuit principle is to make the power consumption and voltage match as much as possible The power consumption of the circuit is much higher than that of the liquid crystal display device.
the micro power consumption of the liquid crystal display device will be lost.
due to the large-scale CMOS mode.
the micro power consumption of the liquid crystal display device will be reduced
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