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General LCD
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How can I improve the sunlight readability of my display?
1. Take your time to select the proper display for your application. Selecting the wrong display in the beginning of your project can lead to disasters further down the road. If you would like assistance in this area, contact one of our display specialists to get started in the right direction.
2. Use anti-reflective or anti-glare coatings on all surface areas, whenever possible. These will help bring to contrast ratio closer to it's original "dark-room" reading.
3. When applying a touchscreen, or other device in front of your LCD display, select the display with the highest transmissivity ratio among those that are durable enough to stand up to the application you product is designed for. Many manufacturers make resistive touchscreens with transmissivities as high as 92-95%, including: Fujitsu, Gunze, and ....
4. Work with a professional company, such as FPD Group, to do "behind-the-glass" enhancements -such as improved light guides, improved optical filters, etc. These enhancements often provide up to 40% increased transmissive brightness (and, in some rare cases, can even double the transmissivity of a display).
5. Make sure polarization of any devices in front of your LCD (such as a touch screen or various filters) are compatible with that of your LCD. Place the device in front of your LCD in direct sunlight and turn the device that lies in front. If the device yields a picture that is more sunlight readable when it is skewed from the way it is supposed to be placed to begin with, then you may need to switch touchscreens or ask your touchscreen manufacturer to adjust their touchscreen to be compatible with your display. Because of this, higher transmissivity touchscreens may not show as well in direct sunlight as those that are less transmissive, but are more properly aligned.
6. Have your display enhanced to be transflective, by FPD or other reputable companies -this process often integrates some of the steps mentioned earlier for best results.
7. If all else fails, look into "active enhancements" such as backlight replacement or (be very careful here) overdriving the backlights. For the best display, you may even want to use anti-reflective or anti-glare filters in conjunction with actively enhanced displays.
If that doesn't work, or if you'd like some help with any of the processes mentioned above, contact one of our display specialists here at FPD group...
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LCD, OLED, TFT, TTL, LVDS??? What's it all mean?
Backlight:
CCFL(CCFT): Cold Cathode Fluorescent Light/Tube
COB: Chip On Board
COF: Chip On FPC
COG: Chip On Glass
Component video:
Composite video:
CRT: Cathode Radial Tube
DPI: Dot Per Inch
Duty:
DVI: Digital Visual Interface
EL: Electro Luminescence
FSTN: Formulated Super Twisted Nematic
IC: Integrate Circuit
Inverter:
LCD: Liquid Crystal Display
LCM: Liquid Crystal Module
LED: Light Emitting Diode
LVDS: Low Voltage Differential Signaling
NTSC: National Television Systems
Committee:
OSD: On Screen Display
PAL: Phase Alternating Line
Panelink:
PCB: Printed Circuit Board
PDP: Plasma Display Panel
SECAM: SEquential Couleur Avec Memoire
STN: Super Twisted Nematic
S-video:
TCP: Tape Carrier Package
TFT: Thin Film Transistor
TMDS: Transition Minimized Differential
Signaling:
TN: Twisted Nematic
VGA: Video Graphic Array
VOD: Video On Demand
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Why are there lines going through the display?
Usually lines in the
display are not a function of a problem with the display itself (though there are exceptions). The
display serves only as a dumb terminal & displays what information it
is given. Typical problems related to the display itself would be
issues regarding colorization, color uniformity, light uniformity, or a
cracked screen (where the image would be visably distorted around the
cracked area of unstructured liquid crystal matter).
Color lines suggest that there is a mix-up in what the screen is being
told to display. This usually happens when there is a problem related
to interconnect cables (i.e. a cable is severed or not connected to the
display or board) or the cables are improperly pinned-out. If a
different version of a panel is being tested, it is quite possible that
the associated pin-out would be different on this display. If the
connector is the same, the pin-outs may (and often will) still be
different. Of course, this may also run back to the board in which
case a BIOS written specifically for this display may be needed (if the
original BIOS does not support the new panel). In some cases, an IC on the display itself may have gone bad or one of the flex cables going into the display been severed, however, this is a much rarer situation.
Chances are that it's a cable issue -related to the cable connection or
pin-out. Please review specifications of the old panel and compare
them to the new panel in regards to the pin-out configuration.
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