LED LCD backlight power consumption measured inside

With the 118% color gamut of ViewSonic VLED221wm listed, wide color gamut display has become increasingly popular. So that VLED221wm can achieve such a high color gamut behind the scenes, LED backlight has gradually been recognized by consumers.

As we all know, LED backlight compared to the traditional CCFL cold cathode backlight has three advantages, in addition to the most striking purpose can bring a wider color gamut, the other focus is lower power consumption, more power. In theory, the LED internal driving voltage is much lower than that of CCFL, CCFL AC voltage requirements are relatively high, reaching 1500 to 1600 when the Vac starts, and then to 700 or 800Vac, while LED only needs 12 ~ 24Vdc or lower voltage can work.

New old machine emperor PK

So, in actual use, LED backlight really power? If saving electricity, how much can be saved? In the following article, the author will be on the three inch 22 inch machine level display for everyone to answer the above questions. These three products were LED backlight using ViewSonic VLED221wm, using W-CCFL backlight LG L227WT, using CCFL backlight LG L226WTQ (LG generation of the old emperor).

ViewSonic VLED221wm

LG L227WT

LG L226WTQ

Picture size

22 inches

22 inches

22 inches

Backlight

LED

W-CCFL

CCFL

Color gamut

118%

100%

74%

Power waste

38W

40W

45W

brightness

300 square meters cd/

300 square meters cd/

300 square meters cd/

contrast ratio

12000:1

DFC 10000:1

5000:1

visual angle

170 degrees /160 degrees

170 degrees /170 degrees

170 degrees /170 degrees

response time

5ms

2ms

2ms

Of particular note is that the LG L227WT uses W-CCFL backlight, CCFL backlight improved traditional cold cathode module, its technical principle is based on the original CCFL backlight, add a "phosphorus" the self luminous material, so that the L227WT reached 100% of the wide gamut.

Source: North network