First of all, let's start with the brightness of the screen and eye health!
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Screen brightness and visual health
Our general habits, in the evening, I hope that TV can be high in brightness and high in quality. In fact, the screen brightness of the LCD TV should be controlled in a moderate state, and the TV screen is too bright and often feels uncomfortable. The researchers pointed out that when the brightness of the display reaches 100cd & m2 (cd & m2 is the brightness unit used in display and TV products, which means the brightness of the candle per square meter, that is, the light intensity per unit area), it will cause visual fatigue. The "brightening technology" display that uses the light transmission rate to increase the brightness is easy to cause the eyes to be "stabbed" by the light, and it is also prone to eye fatigue and even health problems such as decreased vision and headache.
Ways to increase screen brightness
At present, there are two ways to increase the brightness. The first method is to increase the light transmittance of the LCD panel; the second is to increase the brightness of the background light or increase the number of lamps. The first to improve the light transmission rate of the LCD panel is also called "brightening technology". The surface of the display screen is like a glass, which enhances the reflection of light, and also improves the color contrast and saturation of the screen.
The effect of high brightness on image quality
The excessive brightness of the LCD TV not only causes visual fatigue, but also reduces the contrast between pure black and pure white, affecting the performance of color gradation and gray scale. The survey shows that the brightness of the traditional CRT TV is about 300-600 cd/m2, and it has been proved that such brightness is sufficient for the visual appreciation on the screen of 20-35 inches.
How to choose the right brightness LCD TV
At present, the brightness of most TVs on the market is around 450-600 cd/m2, and individual ones reach 800 cd/m2, 1000 cd/m2 or even higher, which can meet the needs of most consumers. Choosing the right brightness has a lot to do with the distance to watch TV. The TV viewing distance of the big screen is generally large, which is suitable for selecting the model with higher brightness, while the TV for small screen should choose the product with not too high brightness. At the same time, the uniformity of brightness is also one of the important criteria for selection, but it is usually not marked in the LCD TV product specification. Whether the brightness is uniform or not, and the number and configuration of the backlight and the mirror are closely related. The TV with better quality has uniform brightness and no obvious dark area. Uneven brightness will seriously affect the picture appreciation, and the method of determining uniform brightness is usually observed carefully when the screen is single color. Therefore, picking an LCD TV may wish to ask the receiving person to adjust the screen to a single color to distinguish.
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