WLED full name White Light EmitTIng Diode (white light diode), WLED as an alternative to CCFL backlight, there is not much improvement in technology, the display backlight is changed to use LED, it will have power saving (about 20% less than CCFL) Power), long life and impact resistance.
LED lights are also known as light-emitting diodes, and the power consumption of a single LED lamp is minimal. From blue to red, LED lights come in many colors. In various colors, it can be roughly divided into two types: highlight and low. Since white is a mixed color, there is no identifiable wavelength value, so it is represented by its coordinate value on the chromaticity diagram. We customize it as "cold white" and "warm white". In various colors, there is a problem of color deviation, especially white, and LED suppliers cannot effectively control them.
WLED full name White Light EmitTIng Diode (white light diode), WLED as an alternative to CCFL backlight, there is not much improvement in technology, the display backlight is changed to use LED, it will have power saving (about 20% less than CCFL) The characteristics of the battery), long life and impact resistance, the structure of the backlight module is as follows:
1. Side WLED backlight: The side backlight needs to use the light guide plate (glue) to evenly distribute the LED light to the display screen area, so the concept of light leakage is also generated. When the quality of the light guide film (plate) is not good or the structural layer When there is a problem with the adhesion between the two, the light leakage will be very noticeable.
2, the bottom WLED backlight:
The evenly distributed LED module at the bottom is also a design method. The design looks like the process is more complicated than the first one. The entire backlight board needs to consider the soldering and wiring problems. The view of the sky is stable when the device is too dispersed. Sexuality definitely has a negative impact. If the RGB LED is sure to cause a delay in the response of the RGB LED.
WLED backlight screen advantages:
Low driving voltage, long life, small size, light weight, good color gradation, more uniform brightness, more environmental protection and impact resistance.
WLED backlight screen disadvantages:
Brightness and contrast are relatively low (RGB LED).
Although RGB LEDs look similar to WLEDs, they are more demanding in design. RGB LEDs are still the preferred backlight type for some high-end LCD monitors, so the price is also a matter of course. RGB LEDs use three-tone tones and produce white backlights. In engineering, it is necessary to take into account the color shift caused by voltage and current changes, and also need to consider the problem of complete failure or partial failure of RBG LED, etc. Compared with WLED, its production cost is high and complicated ( The cottage is not counted).
RGB LED backlight screen advantages:
Small size, light weight, higher efficiency, better lumen maintenance, better brightness and contrast.
RGB LED backlight screen disadvantages:
High manufacturing cost, color dispersion, color shift, etc. are problems that cannot be avoided by using RGB LEDs. No matter how the technology develops, the whites of RGB and the white of WLEDs will always be different. In addition, the RGB LED backlight will also encounter a response time problem.
Classification of LED backlights: edge light.
1, LED light backlight.
LED lights are also known as light-emitting diodes, and the power consumption of a single LED lamp is minimal. From blue to red, LED lights come in many colors. In various colors, it can be roughly divided into two types: highlight and low. Since white is a mixed color, there is no identifiable wavelength value, so it is represented by its coordinate value on the chromaticity diagram. We customize it as "cold white" and "warm white". In various colors, there is a problem of color deviation, especially white, and LED suppliers cannot effectively control them.
2. CCFL backlight.
The biggest advantage of such a backlight is that the brightness is high, so that a large black-and-white negative phase, a blue mode negative phase, and a color liquid crystal display device are basically used. In theory, it can make a variety of colors according to the color matching principle of the three primary colors. The disadvantage is that the power consumption is large, the inverter circuit is required to be driven, and the operating temperature is narrow, ranging from 0 to 60 degrees.
LED backlight classification 2: bottom backlight.
1, EL backlight. That is, electroluminescence is a cold light source that emits light by intrinsic luminescence of a phosphor excited by an alternating electric field. Its biggest advantage is its thinness, which can achieve a thickness of 0.2~0.6mm. The disadvantages are low brightness, short life (generally 3000~5000 hours), inverter drive, and interference from the circuit, such as flicker and noise.
2. LED backlight. The advantage is good brightness and good uniformity. The disadvantage is that the thickness is larger (greater than 4.0mm), the number of LEDs used is large, and the heating phenomenon is obvious. Designs are generally made in low-light colors, while high-bright colors are largely ignored due to high cost.
Now there are so many kinds of displays on the market. If you don't know the detailed information, it's really difficult to get started. Now Xiaobian can help you organize it. After the above detailed explanation and comparison, do you think you know more about how to choose the WLED backlight or LED backlight display? In fact, the two technologies have their own advantages, so consumers should not be numb when buying monitors, be sure to locate the right, find the right product is the most important!
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