|
What is LCD? |
| |
LCD (Liquid Crystal Display) Panel consists of
the four components as shown below:
1. Backlight module (fluorescent
tube)
Backlight module: Also known as fluorescent tube.
Cathode rays send light to light guide panel by
means of back-end illumination; light enters diffusion
points on light guide panel in total reflection
and diffuses light to all corners. At that stage,
40-50% of light penetrates the front of light guide
panel, and the non-diffused light enters a reflection
panel on the bottom to enter the light guide panel
again. The technology today can successfully guide
85-90% of light to be diffused on the front of light
guide panel.
II. Polarizer module
The disarrayed light on the backlight module is
arranged to single direction; the function is similar
to polarized coil of CRT.
III. Glass substrate and thin
film transistor (TFT liquid crystal molecules)
In the early years, , this component is the technical
bottleneck for manufacturers due to the high defect
rate of incision of thin substrate that contains
millions of liquid crystal molecules. The production
cost for 3.5 to 4th generation LCD has been lowered
with the production line technology. The concept
behind it is that electrified liquid crystal molecules
create shadow dots in backlight, and form shadow
lines, planes, and finally images. IV. Color filter
module
The tint can be adjusted through the electric field
intensity of liquid crystal molecules, and the colors
are adjusted through color filters. The color scales
are created by different filters, and the three
primary colors are mixed to create 1.6million pigments.
|
| |
|
|
Why does LCD appear more fuzzy in
DOS than in Windows ? |
|
The standard resolution of LCD monitor panel is
1024 x 768 instead of 604 x 480 in DOS; thus, the
image may appear fuzzy (the optimal resolution for
LCD is 1024 x 768, please set the OS resolution
to 1024 x 768) |
|
|
|
Is interference signal appeared on
LCD normal when turning on and shutting down the
computer ? |
|
In rare cases, interference may appear on the
monitor. This may be caused by signal rate of VGA
card and is considered normal. The image quality
can be improved by adjusting the phase or pixel
rate automatically or manually. |
|
|
|
How do I deal with flickering LCD
screen? |
|
Please check the pins of signal connectior. If
the pins are bent or lost, please contact the dealer.
Or check display card and make sure the setting
is correct. Or check scan rate , and set the display
card to acceptable range |
|
|
|
What do I do if LCD shows no signal
after connecting to the power? |
|
Please check the power-saving mode of the system,
click any key or move the mouse to exit the power-saving
mode. Or check the signal connection stitches. If
the stitches are bent or lost, please contact the
deal. |
|
|
|
The monitor seems flickering, what
can I do? |
|
To eliminate the flickering, click Start ->
Setting -> Control Panel -> Display. In Display
window, select Setting tab -> Advance -> Adapter
-> Reset, select new rate according to your needs.
In most cases, human eyes would not sense flickering
at rate of 72Hz. (The optimal resolution is 1024
x 768, the rate is 60.5 Khz/75Hz) |
|
|
|
How do I adjust the resolution? What
is the relationship between the display card and
resolution? |
|
To change monitor resolution, click Start ->
Control Panel -> Display. Select Setting tab
to adjust the monitor resolution in Desktop Area.
The available resolutions, ¡§640 x 480¡¨, ¡§800 x 600¡¨,
¡§1024 x 768¡¨, ¡§1152 x 864¡¨, ¡§1280 x 1024¡¨, ¡§1600
x 1200¡¨, are determined by the display card in your
computer. The unit of resolution is in pixel. The
resolution can also affect the number of colors
shown on the monitor. Since the memory of a display
card is limited, high resolution can result in fewer
colors. Average display card is equipped with 8MB
memory and is able to show true color (16.7 billion
colors) under resolution of 1024 x 768. In addition,
resolution can affect refresh rate of the monitor.
New model display card and monitor can achieve optimal
setting through communication on DDC interface with
minimal problems. Old model equipment requires application
provided by the hardware manufacturers. |
| |
|
|
Why does LCD function well when connected
to single signal, but lose brightness and color,
or even show no image when connected to signal distribute?
It shows Show " NO SYSNC " or "OUT
OF RANGE " on the screen. " |
| |
The panel impedance is high, so the signal is
designed to transmit in a one-to-one manner. Signal
distribute may decrease its signal, brightness,
and color quality. Please use single machine signal. |
|
|
|
Why is there only one LCD resolution?
Why are the effects inferior under other resolutions
or DOS? |
|
Since LCD displays images in corresponding dots.
Take 15" LCD for example, the distance between
the dots are 0.297mm, which is the resolution for
1024 x 768. In this module, all dots are distributed
evenly to display the best images. Other resolutions
or DOS module display may shrink the image or redistribute
dots by simulation algorithm to result in uneven
images or images with oversized dots. |
|
|
|
Why is there no visible changes even
Contrast and Brightness are adjusted? |
|
The adjustable range in OSD is extended by R&D
design to better fit the features of LCD Panel,
protect LCD Panel, and increase its life cycle;
thus, images may not show visible changes even Contrast
and Brightness are adjusted |
|
|
