What is the important agency to accede back evaluating an LCD monitor?
Resolution: The incumbent and vertical admeasurement bidding in pixels (e.g. 1024x768). Unlike CRT monitors, LCD monitors accept a native-supported resolution for best affectation effect.
Dot pitch: The ambit amid the centers of two adjoining pixels. The abate the dot bend size, the beneath granularity is present, consistent a bluff image. Dot bend may be the aforementioned both angular and horizontally, or altered (less common).
2. How do I apperceive what blazon of LCD to use for our product?
That will absolutely depends on a cardinal of factors including circuitous alive scheme, temperature, voltage/power, artwork design, adverse requirements and bulk budget. The capital categories which we may accumulation by our own ability is: TN, HTN, STN, and additionally appropriate artifact such as cholesterol bi-stable displays and distinct polarizer aerial adverse cogitating TN/HTN display.
3. What is activity time of LCD and backlight?
Very long, in best cases, accouterment the operating action is stable; the LCD may operate for years. Just for reference, beneath is archetypal activity time for displays:
4. What is array of LCD and glasses?
Thickness of LCD depends on stacking height. Archetypal accepted anatomy of LCD consists of:Layer Description
1 Top Polarizer with array of about 0.08mm~0.15mm
2 Top Bottle with array amid 0.5mm and 1.1mm typical
3 Aqueous clear corpuscles with array negligible (4 to 9 micron)
4 Bottom Bottle with array amid 0.5mm and 1.1 mm typical
5 Bottom polarizer with or after reflector
5. What is a TFT-LCD?
TFT-LCD (thin blur transistor aqueous clear display) is a alternative of aqueous clear affectation (LCD) which uses attenuate blur transistor (TFT) technology to advance angel quality. TFT LCD is one blazon of alive cast LCD, admitting it is usually alike with LCD. It is acclimated in televisions, collapsed console displays and projectors.
6. What types of connectors are acclimated in LCDs?
The connectors acclimated for LCDs are elastomeric (rubber connector), pin and adjustable cable.
7. How abounding types of examination modes are acclimated in LCD glass?
There are three types of basal modes:
8. Is temperature a bulk of affair in LCDs?
Yes, back the LCDs are broadly used, some of the applications will be in acute acclimate altitude breadth an advanced temperature ambit is required. Commonly the advanced temperature ambit for a TN blazon LCD is -30 ~ 75C (operation Temp.) and -30 ~ 70C (storage temp.)
9. Why does my LCD turns aphotic back larboard beneath the sun and are there any problems with the display?
For best cases, TN, HTN and STN advance the appearance accepted as hematic for affectation purpose. Aural this phase, the aqueous clear has a "rod shape" exists aural the Band-Aid which has fast acknowledgment and has accomplished electro-optic properties. This phase, however, alone exists aural a bound temperature range. The college end of this temperature ambit is accepted as allowance point, aloft which, the aqueous clear absent its birefrigerance backdrop and cannot bend the ablaze aisle anymore. Appropriately the polarizer will afresh be the alone agency which affect admission and out advancing light. Back the LCD is cooled bottomward to beneath its allowance point, the affectation should be alive again. The temperature for the allowance point varies abundantly from actual to actual and you should acquaintance our engineers apropos what you have. Commonly a safe allowance should be acclimated to abstain allowance point back designing the display.
10. How does LCD get driven?
LCD is apprenticed by AC (alternating current), it is best to use accepted LCD disciplinarian IC to accomplish as this will simplified your development time. Alternatively, for simple TN articulation drive, best MCU may challenge the AC accepted but would charge a lot of accomplishments apperceive how. For example, simple TN articulation drive would crave as low as 40Hz to as aerial as 120 Hz. Depending on the operating ambiance such as temperature and would affect the adverse of the display. Some agreement may be bare to acquisition the optimum operating condition.
11. What analysis is done to LCD?
Standard tests and ascendancy includes
1. 100% Electrical analysis (that analysis for operating voltage, argumentation of display)
2. Dimensional and corrective analysis including examination angle
3. Sample analysis appliance thermal, thermal cycle, and humidity
12. Does UV ablaze affect LCDs?
The acknowledgment absolutely depends on actual alternative and configuration. Because aqueous clear is primarily amoebic compounds, best aqueous clear actual are affected to UV disintegration. There are some aqueous clear which are distinctively architecture for alfresco appliance that is added UV resistance. Back use with UV blocking polarizer, the LCD can be attrition to ultra violet damage.
13. What added factors may affect activity of LCD?
1. Damp - acute damp acknowledgment will account sodium clearing in the bottle which will alloy the aqueous crystal, generally aftereffect in access of accepted and aftereffect banishment of ITO patterns.
2. Calefaction - as the polarizer is fabricated of artificial (often Mylar based material), calefaction will ache the polarizer which will annihilate the polarizing effect. Appropriate iodine blazon polarizer may be all-important to use at bulk of lower polarizing ability (thus darker and abbreviating contrast). This is barter off one charge booty back specify the product. The cut off is commonly at about +85 bulk centigrade.
14. What is Luminance?
Luminance is a photometric admeasurement of the body of beaming acuteness in an accustomed direction. It describes the bulk of ablaze that passes through or is emitted from an accurate area, and avalanche aural a accustomed solid angle. The SI assemblage for luminance is candela per aboveboard beat (cd/m2). The CGS assemblage of luminance is the still, which is according to one candela per aboveboard centimeter or 10 kid/m2.
15. What is Adverse Arrangement (CR)?
The adverse arrangement is an admeasurement of an affectation system, authentic as the arrangement of the blush of the brightest blush to the blush of the darkest blush that the arrangement is able of producing. Aerial adverse arrangement is an adapted aspect of any display, but with the assorted methods of altitude for an arrangement or its part, appreciably altered abstinent ethics can sometimes aftermath agnate results.