Want to add a little external screen around of around 10 "

The external screen should be around 10 " and consume as little as possible.

What type of screen should I add and how many Watts I can expect it to consume ?

Any good places for this ?

My 13 " on my Samsung X360 uses around 4.5 Watt at max brightness.

 

I'm gonna have to call shens on your display consuming only 3.5watts at full brightness.

 

"calling shens" ? (sorry, not native in english)

I measured this with a Watt meter (my other acer 17 " laptop 7720G consumes around 10 Watt (older generation screens))

This is pretty much in line if you compare screen area of the 17" with 13 " , around half less area 10/2 = 5 Watt




P.S. Stand corrected 4 instead of 3.5 W

 

USB connect and powered screens can be had for around $200-

The max power drain allowed on USB ports is 500ma.

 

search for mimo, they make such external screens. i have one at use on my homeserver, to display a clock and stats. i think it's 10".. powered over two usb cables.

 

Volt x Amp = Watts. My AC adapter says it has 19.5 V multiplied by 3.9A which is like 75 or 76 Watts, I'd say an LCD screen takes about 1/4 to 1/3 out of 75 at max brightness. I find your numbers impossible to work with.

 

Specifications

• Model MIMO UM-740 (7")
• LCD Panel Size 17.78 cm
• Display Size 152.4mm (H) x 91.4mm (V)
• Pixel Pitch 0.1905mm (H) x 0.1905mm (V)
• Number of Colors 16.7M
• Contrast 400:1
• Brightness 350 cd/m²
• Input Power USB (DC 5V)
• Screen resolution WVGA (800x480)
• Power consumption 2W~4.5W
• Dimensions 197mm (H) x 97.5mm (L) x 180.7~210.4 (H)
• Weight 0,64 kg

so power consumption is good, but it's not 10"

 

What type of screen consumes the lowest amout of power ?

 

That means max 5 V * 0.5 A = 2.5 Watt per USB port ?

 

The screen must be able to run of the power of the laptop

 

You forget that the AC adapter supplies enough power to both run the laptop and fully charge its battery at full load, so you have to assume the max power draw is only half that ~38W, and then figure the screen at 1/4 of that ~10W.

 

He also forgot that I tested this experimentally with a professional Watt meter...

 

A 'professional watt meter' will give unprofessional results if not used correctly. Did you measure the DC drain of the screen itself or the AC drain of the power brick while you toggled the screen backlighting on and off?