Common Misconceptions About Highlighting Night Screens

Here are some common misconceptions about night screen highlights

1. The division of illumination and brightness

At present, high brightness, low power consumption and high contrast are all pursued in the industry of high brightness liquid crystal display (LCD). Therefore, some businessmen do not focus on scientific research and innovation, but on the concept and test instruments.

First, on the instrument:

A. Professional luminance tester/ordinary luminance meter (merchants use the data tested by ordinary luminance meter to replace the data of professional luminance tester, shoddy!)

B. Use professional instruments to replace brightness value with illumination value.

C. professional instruments are not more positive than normal.

D. Do not do contrast and light source uniformity test

The second is in concept: consumers face some professional terms are indistinguishable, either to see the screen is bright or its brightness or illumination. Intensity (lightness) is a kind of nature color, or have relationship with bright color of the color space of a dimension. In the Lab color space, brightness is defined to reflect the subjective feeling of brightness of human beings. Illuminance is defined as the intensity of light (luminosity) per unit of projected area of any surface in a given direction, viewed from the same direction. The units are feet lambert. The unit is Lux (lx), namely 1m/m2. And the definition of brightness refers to the luminous body (reflective body) surface luminous (reflective) strength of the physical quantity. When human eyes observe the light source from one direction, the ratio between the light intensity in this direction and the light source area "seen" by human eyes is defined as the brightness of the light source unit, that is, the luminous intensity on the unit projected area. The unit of brightness is kendra/square meter (CD /m2). The brightness is the person's perception of the intensity of light. It's a subjective quantity. Unlike brightness, the objective corresponding quantity defined by physics is light intensity. These two quantities are often confused in common everyday language. Illuminance value is affected by the size of the space, length, height, reducing light coefficient, number of lamps, representing the area of the illuminated object, amount of light. To the quantity of illumination has a perceptual knowledge, the following example calculation, a 100 w bulb, the total luminous flux from about 1200 lm, if assumes that the luminous flux evenly distributed on the half spherical surface, is away from the light source 1 m and 5 m of the illuminance values can be obtained according to the following steps: hemisphere with a radius of 1 m area for two PI * 1 ^ 2 = 6.28 m2, is apart from the light source is 1 m of illuminance value is: 1200 lm / 6.28 m2 = 191 lux. Similarly, the hemisphere area with a radius of 5m is: 2 PI ×5^2=157 m2, and the illuminance value at a distance of 5m from the light source is: 1200Lm/157 m2=7.64Lux. Brighter products are not necessarily better products, display screen too bright often feel uncomfortable, on the one hand, easy to cause visual fatigue, but also to reduce the contrast between pure black and white, affecting the performance of color and gray levels. So increase the brightness of the display, but also improve its contrast, otherwise the whole display will appear white phenomenon. Uniformity of brightness is also very important. Whether the brightness is uniform or not is closely related to the quantity and configuration of backlight and reflector. The high quality LCD screen has uniform brightness, soft and non-glare, and no obvious dark area.

2. Division of LCD screen and LED screen

In highlighting consumers are often met in the LCD Panel industry merchants said LCD highlighting, LED change is highlighted, it is easy to mistake a consumer to currently on the market of LED dot matrix display screen, which we call LED/LCD system for liquid crystal display, while the latter LED dot matrix display screen is a light emitting diode, the former consists of LCD glass and backlit display device, while the latter is directly displayed by LED lights, it is important to note the highlighted the LCD panel industry of LCD/LED screen is, in fact, according to the backlight naming method and derived, LCD screen (CCFL backlight), LED screen (WLED backlight) LCD screen to highlight is actually the CCFL backlit LCD screen to WLED backlight, LED screen to highlight is the original WLED backlight of the LCD screen to brighten, of course, the highlight screen is not only to change the backlight, more in-depth technical problems need to consult the corresponding High Brightness Lcd manufacturers.

3. Highlight the original screen and assembly screen

Current global several Large LCD manufacturers only RisingStar, RisingStar, RisingStar, mitsubishi in highlight LCD production, RisingStar only 47/72 inch 2000 nit two Gao Liangbing, said has stopped production, RisingStar 55/65 inch 1000 nit Gao Liangbing, mitsubishi industrial small size, the more the due to highlight the application field of liquid crystal screen environment worse and the demand of the market is not much, Lcd Display the original manufacturer of Gao Liangbing price is quite expensive, is now the highlight LCD screen on the market or in the majority with assembly, and accounts for the absolute market share, So-called highlighting the metal screen assembly is used for the PuLiang LCD screen in the original screen under the condition of invariable appearance and structure to be modified, (easy to mislead the consumer is to highlight the original screen), another kind is under the condition of the original screen structure to be modified (using only the original manufacturer of LCD glass), domestic highlight LCD industry now the highlight LCD screen assembly modification.