DS1052E - Battery Icon - Page 1
Forum section: electronics / projects

author: migsantiago
author_rank: Frequent Contributor
timestamp: May 16, 2010, 02:31:34 pm
content: HelloI have an unmodded DS1052E with no battery. It sometimes shows a battery icon (or at least it looks like one) on the upper part of the window...http://img526.imageshack.us/img526/6008/newfile1bmp.pngThe question is... why does it show it if it doesn't have a battery to recharge?Right now it's not showing the battery, it does it sometimes.Software version 00.02.02 SP2Another question, it has a screen saver option in the Utility menu. Is the screen due to be damaged if it keeps a fixed image for a long period? Just like plasma TV's.

author: wd5gnr
author_rank: Regular Contributor
timestamp: May 16, 2010, 02:32:34 pm
content: Its not a battery. Its your USB stick.As for the screen saver -- the backlight is a florescent bulb and I suppose the screen saver could prolong its life. But the LCD screen itself should not degrade as far as I know. If you were leaving these on all day every day, it might be worth it. For the way I use my (maybe an hour a week tops) I don't bother with it.

author: migsantiago
author_rank: Frequent Contributor
timestamp: May 16, 2010, 02:34:25 pm
content: hehehe Mistery solved then. Thanks!!

author: tecman
author_rank: Frequent Contributor
timestamp: May 16, 2010, 03:06:37 pm
content: I am pretty sure that it uses LED backlighting, rather than fluorescent.Paul

author: migsantiago
author_rank: Frequent Contributor
timestamp: May 16, 2010, 03:46:57 pm
content: Quote from: tecman on May 16, 2010, 03:06:37 pmAnd that means... ?

author: wd5gnr
author_rank: Regular Contributor
timestamp: May 16, 2010, 05:34:11 pm
content: Ah that could be. In that case, I have no idea. Although I *think* I read in the Rigol manual it "saves on the screen backlight". Of course, the manual isn't always up to date or right, so it could have an LED backlight -- I haven't had mine open (yet).Yep, page 111 (or 2-83) of the manual: Screen saver: This function extends the life of LCD backlighting system.Now like I say -- that could be something they've copied from somewhere. If it is LED I don't think it would matter much. Some of the older "white" LEDs tended to age (the 3 chip kind) so maybe...But I'm still guessing it is an ELP, CCFL, or HCFL.

author: Unknown
author_rank: Unknown
timestamp: May 16, 2010, 06:00:14 pm
content: All LED's age (depending on the current), the question is just if the effect is meaningful compared to the rest of the equipment. Unless you run it 24/7 (and even if you do), it likely isn't. The rating of the capacitors is probably for much less operating hours (depending on temperature) than the LED backlights. Even with CCFL backlights, the inverters appear to die more often than the CCFL itself.

author: wd5gnr
author_rank: Regular Contributor
timestamp: May 16, 2010, 08:19:54 pm
content: Yes all LEDs age. The key to the old 3 chip white LEDs was they aged at different rates. But they were more actually white (at least when new). The newer ones are (I think) blue LEDs with some yellow phosphor to make up the difference but there are some gaps in the spectrum that our eyes don't care much about. I read about some that are UV LEDs with 3 different phosphors but I haven't seen one of those.

author: Zapro
author_rank: Contributor
timestamp: May 31, 2010, 08:00:10 pm
content: I've had mine taken apart, and it is CCFL backligt. I actually was pondering making a battery pack for the instrument for usage in the field, but the inverter for the power supply is buit in the power supply board, so not easily powererd outside, maybe i'll be adding a diode to it's positive supply so i can power it when the main supply is off.// Per.