24-11-2012, 04:43 PM
Features of lcd displays
[attachment=41041]
Advantages of lcd displays
Brightness: Produces very bright images due to high peak intensity. Very suitable for environments that are brightly lit
Emissions: Produce considerably lower electric, magnetic and electromagnetic fields than CRTs.
Geometric Distortion: No geometric distortion at the native resolution. Minor distortion can occur for other resolutions.
Power Consumption: Energy efficient. Consume less than 1/3 the power of a comparable CRT. Consume less electricity than a CRT and produce little heat.
Physical Aspects: Take up about 40% less desk space. LCDs are thin and compact.
Screen Shape: Completely flat screen.
Sharpness: At the native resolution, the image is perfectly sharp. Adjustments are required at all other resolutions which can result in measurable degradation to the image.
Introduction to display screens
CRT displays
LCD displays
LED displays( LED backlit LCD displays)
OLED displays
PMOLED
AMOLED
Crt to lcd
LCD monitors consume less power. An average 19-inch LCD uses 45 watts of electricity, while a 19-inch CRT uses 100 watts.
LCD monitors are smaller, thinner and weigh half as much as CRTs. This allows you to mount an LCD on a wall or an arm.
An LCD monitor's tilt, swivel, height and orientation from horizontal to vertical can all be adjusted easily.
LCD monitors don't produce the flicker that CRTs do, generating less eye strain.
LCDs display text much more clearly than CRTs.
Disadvantages of lcd displays:
Aspect Ratio: The aspect ratio and resolution are fixed. (The aspect ratio of an image describes the proportional relationship between its width and its height. The display resolution of a digital television or display device is the number of distinct pixels in each dimension that can be displayed)
Black-Level: Not proficient at producing black and very dark grays. In a "standard" configuration, not appropriate for use in dimly lit and dark conditions.
Contrast: Lower contrast than CRTs due to a poor black-level.
Color and Gray-Scale Accuracy: Color saturation is reduced at low intensity levels due to a poor black-level. Images are satisfactory, but not accurate due to problems with black-level, gray-scale and Gamma.
Cost: Considerably more expensive purchase price than comparable CRTs . (Cheaper lifetime cost: lasts about 13,000 - 15,000 more hours than a typical CRT.)
Gray-Scale: Have an irregular intensity scale and typically produce fewer than 256 discrete intensity levels. For some LCDs portions of the gray-scale may be dithered.
[attachment=41041]
Advantages of lcd displays
Brightness: Produces very bright images due to high peak intensity. Very suitable for environments that are brightly lit
Emissions: Produce considerably lower electric, magnetic and electromagnetic fields than CRTs.
Geometric Distortion: No geometric distortion at the native resolution. Minor distortion can occur for other resolutions.
Power Consumption: Energy efficient. Consume less than 1/3 the power of a comparable CRT. Consume less electricity than a CRT and produce little heat.
Physical Aspects: Take up about 40% less desk space. LCDs are thin and compact.
Screen Shape: Completely flat screen.
Sharpness: At the native resolution, the image is perfectly sharp. Adjustments are required at all other resolutions which can result in measurable degradation to the image.
Introduction to display screens
CRT displays
LCD displays
LED displays( LED backlit LCD displays)
OLED displays
PMOLED
AMOLED
Crt to lcd
LCD monitors consume less power. An average 19-inch LCD uses 45 watts of electricity, while a 19-inch CRT uses 100 watts.
LCD monitors are smaller, thinner and weigh half as much as CRTs. This allows you to mount an LCD on a wall or an arm.
An LCD monitor's tilt, swivel, height and orientation from horizontal to vertical can all be adjusted easily.
LCD monitors don't produce the flicker that CRTs do, generating less eye strain.
LCDs display text much more clearly than CRTs.
Disadvantages of lcd displays:
Aspect Ratio: The aspect ratio and resolution are fixed. (The aspect ratio of an image describes the proportional relationship between its width and its height. The display resolution of a digital television or display device is the number of distinct pixels in each dimension that can be displayed)
Black-Level: Not proficient at producing black and very dark grays. In a "standard" configuration, not appropriate for use in dimly lit and dark conditions.
Contrast: Lower contrast than CRTs due to a poor black-level.
Color and Gray-Scale Accuracy: Color saturation is reduced at low intensity levels due to a poor black-level. Images are satisfactory, but not accurate due to problems with black-level, gray-scale and Gamma.
Cost: Considerably more expensive purchase price than comparable CRTs . (Cheaper lifetime cost: lasts about 13,000 - 15,000 more hours than a typical CRT.)
Gray-Scale: Have an irregular intensity scale and typically produce fewer than 256 discrete intensity levels. For some LCDs portions of the gray-scale may be dithered.