Front Panel Black
Front Panel Black
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US $5.95
The current low-end models of LCD panels used in basic as TN panels
The so-called 6BIT (16.2M) of the color range used TN panels, the largest number of hair
color up bits 262144 (R / G / B each 64 colors), meaning that each channel can only show 64 (2 of 6 square = 64) level gray scale, then we call 6bit panel, which is pseudo-true color
panels, the current low-end models of LCD panels used in basic as TN panels.
The so-called 8BIT (16.7M) of the color range used by VA (MVA, or PVA) and various IPS
panel, then to achieve 24BIT Seji 16.77 million colors (R / G / B each 256 colors), meaning
that each color channel can be displayed 256 (2 to the 8th power = 256) level gray scale, we call it 8bit panel, which is the true color panel.
The TN panel for 16.2M, through technical means jitter, and can achieve 16.7 color, of
course, false color, and where everyone in the purchase, be sure to pay attention Touch Screen LCD to see the panel type, brand manufacturers of the products are generally Note Ming panel models and colors. Also some tier companies now have to upgrade to the TN panel TN2, and through a variety of color enhancement technology, such as Samsung and LG's complex real mirror chip technology, the Color panel to close 16.2M 16.7M color panels, but still can be seen by comparing the number of differences, because in physics 6bit panel can display 262,144 colors 8bit panel less than 2% of 16.77 million colors, even with another high-technology and can not be compared with 16.7M panel .
In the viewing angle, the use of VA panel 16.7M display can easily achieve the basic
horizontal / vertical viewing angles are 178 degrees, while the use of TN liquid crystal
panel 16.2M products, no matter how strong its technical advantages, the real The viewing
angle 140 degrees also, never be comparable with 16.7M color panel.
TN panels now adopt a reasonable price, the practical use of them, we can not really experience the color panel with 16.7M 16.2M color panel of the actual differences, and16.2M has entered the human eye can distinguish the color range So when choosing color TN panel with 16.2 will continue to be the best of our procurement target. For the professional graphics user, even 16.7M color display can not be compared with the CRT on the same day and therefore inexpensive, professional CRT monitor is still your best choice.
Depth profile control response time, fast for you
Buy liquid crystal display elements should be considered is the first response time, the so
-called pixel response time means the time it takes a change. Take LCD with 8ms response
time in terms of scope Huang, referring to transform a pixel time is 8ms, then one second to
switch the screen value for the 1000 / 8 = 125, this value is much greater than human visual
perception The highest recognition rate of 60fps, so 8ms LCD is the ultimate game plan. ISO (ISO13406-2) on the response time requirement is: when a pixel from white to black power, the electrode voltage from 0 to maximum, that maximum voltage excitation state, the liquid crystal molecules rapidly converted to the new location, the The length of time the process is known as rise time. When a pixel from black to white, pixels applied voltage cut off, the liquid crystal molecules quickly return to pre-position power up, a process known as the fall time. The response time of the process is the rise time plus fall time values obtained.
However, the fact that only considered the provisions of the pixel with the shortest switching time of extreme black black and white, when in actual use to measure up to the gray scale value switch without much guidance. Pixel definition of the response only to the pixels up or down the process 80% of the time, in accordance with the ISO definition of the so-called white i.e. 10% gray, black, 90% gray, the remaining 20% of the time were ignored.
ISO that the original purpose of the definition is not difficult to understand Touch Screen Panel because the
liquid crystal molecules, the stability of power-starter and the last two stages are time-
consuming, 2 Gray 20% of the process of transformation is likely to exceed ISO response time
The time the definition itself , then save it if the 20% target can be greatly beautified,
it is obviously unfair to consumers.
ISO-defined course deficiencies that is not all, of which the most serious is the neglect of
the color change - that is, different gray-scale switching of the time, that is what we use
every day is the largest display monitor the situation. From the liquid crystal display
principle, when a pixel changes from shallow to deep gray gray, its added to the pixel
electrode voltage response at both ends to enhance. However, and ISO specifications defined in black and white black switch compared to the maximum excitation voltage, switching in the
corresponding gray-scale voltage is applied is much lower, so in this case reversed the
response speed of liquid crystal molecules will slow down. Similarly, when the gradation
from deep gray to gray-order transition, the process of contrast, light gray, but this time
do not correspond to the electrode voltage is zero, the corresponding voltage difference
incentive effect will be worse, falling edge time becomes longer.
Is precisely because the ISO norms and is not forcing manufacturers to provide the user
response time parameter of time to consider the middle gray response time, so companies can operate in their own marked space on much larger. Therefore, we must be clear: in the end the response time is talking, it was the real "gray response time" (GTG: gary to gray). But
there is no gray response time, as long as they claim, then rest assured that buying better.
Technical principles on which I start from the gray scale. Response time is the essence of
the liquid crystal molecules in the reverse speed, let the liquid crystal molecules move
faster, generally have the following three ways:
1, increasing the driving voltage law: the rotational speed of liquid crystal molecules and
the relationship between voltage, higher the voltage, the faster the molecular rotation.
2, the liquid crystal molecules to change the initial state method: This method is actually
to the liquid crystal molecules in an unstable state, once a "sign of trouble" to respond
immediately to increase the response time. However, the implementation of this approach can not be unlimited, the liquid crystal molecules can not be too unstable, otherwise it will
not effectively controlled.
3, reducing the level of liquid viscosity law: the more viscous liquid, driving up the more
demanding, This is a reasonable person suspicious missing. If diluted in liquid, easier to
drive, and response time has improved naturally. However, after dilution will affect the
liquid crystal light control capability, improved response time, though, the cost has been
enormous: the lower the viscosity, the more dark color screen, image detail has become
fuzzy, and will produce a small light leakage phenomenon. This is also the LG had only its
S-IPS panel with gray-scale technology is one important reason.
View of the considerable disadvantages of two methods 2,3 (12ms products while some used both methods 1 and 3, resulting in poor display, the new LCD panel has been in the hands and feet a little), so the current gray-scale response time reduction depends on the pressure,
with the panel manufacturer (such as AUO) is expressed as Over Drive Technology. Over Drive technology using liquid crystal relative rise time is mainly aimed at providing a voltage
overshoot (overshoot voltage), and this moment of the overshoot voltage is actually
experienced a rise and a descent back down to the final target voltage (here A general
principle is: the rise Touchscreen Monitor time is significantly greater than the fall time, thus shortening the
time the original process can be increased by providing a higher voltage rise time with a
short fall time to achieve), we can see that over- shoot has been an up / down conversion,
plus an LCD image display their up / down conversion, superposition effect will be significantly enlarged, "manic point" phenomenon may appear.
6 bit principle on the display panel itself, through a "shake" technology to achieve 16.2M
color, and then superimposed with the overshoot, the screen display may also be affected,
especially the "static jitter" phenomenon may occur - this time, do not use gray-scale
technology The LCD will be better but the static performance, which fully shows that
pressure is not omnipotent, let alone increase the LCD unit box LCD drive voltage will also
reduce the life of it? We learned from the AU, where, in fact, we see TN 16ms, 12ms and 8ms panel displays are the same, the response time difference exists because the rear of the drive circuit and whether the application of Overdrive technology, in fact, Current
Overdrive far failed to do for all of the grayscale conversion processing, only part of, but
he did not give specific figures, the final response to the timetable given Overdrive
processing the data are actually testing the best part.
We found that gray-scale technology advantages and disadvantages, and the cost of using
gray-scale LCD technology is higher. For more than 8ms gray scale display, color and
response time to achieve best of both worlds, really can not have both cake and eat it ah!
Not to mention a few ms is generally the fastest response indicators, in fact most of the
screen is still higher than the nominal switching time index, so tell the truth in the LCD
"response time of the largest full" threshold entered 1ms before the CRT than LCD or can
not, and , but the 8ms or more of the demanding gamers who have been totally acceptable.
Note that the brightness contrast, the performance parameters other than to note
Many people on the LCD display brightness and contrast to understand is not much that can adjust the brightness and contrast range of the better, in fact, this is justified. In our
practice, all of the LCD monitor brightness and contrast in the area can meet all our needs,
but careful analysis, light and contrast on the LCD display is actually a very good performance reflects the merits.
About the Author
WholesaleeShop.com.au works for providing high quality goods to all businessmen, such as eBay sellers, distributors, store owners, retailers, drop shippers and small wholesalers at competitive prices. Abiding by the principle of "Super Quality, Satisfactory Services", we are striving hard to be your good business partner. With our joint efforts, we are convinced that the business between us would bring much benefit to both of us.
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