How To Select The Television With Correct Screen Luminance

By Author: Code Blue
Total Articles: 473
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Luminance is the brightness of screen and the unit is cd/m2. The disadvantage of early LCD televisions and monitors is the brightness shortage, which greatly influences the LCD TV screen performance and the viewing effect. In order to get better screen quality performance, the manufacturers used to produce LCD television with higher brightness.

How to increase the screen brightness? Currently, there are two ways to improve the brightness: one is to improve the light pass rate of LCD panel; and the other is to increase the brightness of background light or the lamps number. The method to improve the light passing rate of LCD panel is also called polishing technology. It likes to cover a layer of glass on the surface of display screen to enhance the reflection of light and improve the color contrast and saturation of screen.

However, the light screen may cause eye discomfort to people. Researchers note that when the screen lightness reaches 100cd/m2, it can cause visual fatigue. The application of polishing technology makes eyes vulnerable to the light stimulation to cause eye fatigue, vision loss, headache and other ...
... health problems. On the other hand, the contrast between pure black and pure white decreases and influences the performance of color gradation and gray scale. Survey showed that the brightness of conventional CRT TV is 300 to 600cd/m2, while the 20 to 35 inches screen size with such brightness is sufficient to meet the requirements of visual appreciation.

Currently, the brightness of most televisions is between 450 cd/m2 and 600 cd/m2, which could meet the requirements of most consumers. The suitable brightness is closely related with the distance of television. The distance of big screen is often far away and it is suitable to choose the television type of high brightness, while the television of small screen is suitable to choose lower brightness products.

Brightness uniformity is also very important, but it is not marked in the LCD TV product specifications. The brightness uniformity is related with the backlight and reflector amount and collocation. The television of good quality often has average screen brightness and no obvious dark area. So, people should be especially careful in picking products.

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