TV News: What's New About Daily Brightness?

What is Brightness Brightness refers to the brightness of the picture in units of candelas per square meter (cd/m2) or nits. The meaning of candelas per square meter (cd/m2) or nits is the brightness of the candle light per square meter, ie the light intensity per unit area.

Liquid Crystal and Brightness One of the major shortcomings of early LCD TVs and monitors was that they could not be improved twice, which greatly affected the picture performance and viewing effects of LCD TVs. Therefore, in order to obtain better picture quality performance, manufacturers were accustomed to producing higher brightness. LCD TV.

How to increase the brightness of the screen There are two ways to increase the brightness at present. One is to increase the light passing rate of the LCD panel; the other is to increase the brightness of the background light, or increase the number of tubes. Raising the light transmittance of the LCD panel is also referred to as "polishing technology." The display surface is like a layer of glass, which enhances the reflection of light and also improves the color contrast and saturation of the screen.

The screen brightness and visual health need to pay attention is that brighter products are not necessarily better products, TV screens often feel uncomfortable. The researchers pointed out that when the brightness of the display reaches 100cd&m2, it will cause visual fatigue. The use of "polish technology" makes it easy for the display to be "stabbed" by the light. It can also cause eye strain and even lead to vision loss and headaches.

Highlight is not the only pursuit of high brightness on the one hand is prone to visual fatigue, but also makes the contrast between pure black and pure white, affecting the performance of color scale and gray scale. Surveys have shown that the brightness of conventional CRT TVs is around 300-600 cd/m2, and it has been proved that such brightness is sufficient for visual appreciation on a 20-35-inch screen.

Choosing the Right Brightness Products At present, the brightness of most TVs in the market is around 450-600 cd/m2, and some of them reach 800 cd/m2, 1000 cd/m2 or even higher, which can meet the needs of most consumers. Choosing the right brightness is very much related to the distance of watching TV. The viewing distance of large-screen TVs is generally relatively large, which is suitable for selecting the higher-brightness models, while the small-screen TVs should select products with less brightness. Generally, the ideal brightness choice can be roughly referenced to this standard, ie not higher than the square of the screen height of 2200*, and not less than the square of the screen height of 1800* (the screen height is firstly converted into the international standard unit: meters).

LCD TVs also need to pay attention to the uniformity of brightness Brightness uniformity is also very important, but usually not marked in the LCD TV product specification. Whether the brightness is even or not, and the number of backlight sources and mirrors is closely related to the configuration method. The television with better quality has even brightness on the screen and there is no obvious dark area. Non-uniform brightness will seriously affect the picture appreciation. The method of determining the brightness uniformity is usually only careful observation, especially the best chance of a single color on the screen. Picking the LCD TV may wish to ask the receiving staff to identify the screen into a single color.