Question LCD LED IPS - Page 1
Forum section: electronics / beginners

author: aranvaryt
author_rank: Newbie
timestamp: March 16, 2025, 05:39:56 pm
content: display IPS LED LCD is not energized frequently and is stored for many years without use, the liquid crystals will go to sleep and will not respond correctly. Will it generate problems with the pixels and permanent image retention because not use long periods? i have little handheld consoles with display lcd led ips

author: dkfan9
author_rank: Newbie
timestamp: March 16, 2025, 06:43:29 pm
content: Having it off for long periods should remove any image retention--turning a display off for a long period is one way to remove image retention (reducing stored charge and/or equalizing temperature across screen)

author: aranvaryt
author_rank: Newbie
timestamp: March 16, 2025, 06:51:24 pm
content: In the gpt chat it says that if I store the ips led lcd display for years or decades without use there will be problems with the backlight, leds and pixels, is this true?

author: dkfan9
author_rank: Newbie
timestamp: March 18, 2025, 12:56:12 am
content: Anything unattended for years or decades could have issues. An LCD display, a lawn, a building... I'm not sure what particular issues an LCD would have though, aside from the universal: dust buildup, oxidation, bad solder joints, perhaps a blown cap if there's any electrolytics. Perhaps AI can provide details I don't have.

author: aranvaryt
author_rank: Newbie
timestamp: March 18, 2025, 06:18:10 pm
content: If you store an any IPS LED LCD panel without using it for a long time (many years), will the pixels develop dead and stuck pixels? Can liquid crystals settle over time, leading to slow response times or “stuckness”, where they may not change state correctly when turned on after years of inactivity? Do LEDs and backlights die or lose efficiency?

author: joseblo
author_rank: Newbie
timestamp: March 19, 2025, 03:15:45 am
content: Unless there is a leak of the LiquidCrystal or the temperature falls well bellow freezing LCD displays (even In Plane Switching or PLS et al) should be fine for over a decade. The seal around the edge (epoxy or glass frit) should be good and the LC isn't particularly reactive with O2/H2O diffusion. I worry more about the ACF (Anisotropic Conductive Film) contacts between flex and the LCD especially if the Silicon Display Driver IC (DDIC) is on the Flex. Even on glass the ACF may fail over time or with many temperature cycles. 20 years would be a long time and I'd start to worry about non-automotive/mil-spec/industrial displays.As to the LC material damage due to fields. It is constant voltages that cause "plating" of the LC onto one of the electrodes. This is normally compensated for by alternating polarity/inversion of the field each display frame (eg 30Hz). It is the amplitude of the inversion voltage on each pixel that pulls the LC into an angle which in turn rotates transmitted light polarization. Zero amplitude (preferably zero voltage between pixel electrodes and common electrodes) usually leads to no rotation (either normally On or Off) and is fine for the display. Plating usually isn't a problem over seconds, but can cause permanent damage to the display if "high" (even 1V) voltages are left on the panel for minutes or hours. However, normally panels are turned off or updated/inverted at least 1Hz. Particularly for IPS/PLS panels the fields are between electrodes on the active side of the display (where the amorphous or polysilicon TFT are) and it would be difficult to maintain a voltage on them when power to the DDIC is off. Other displays (VA/PVA) use a fixed common Vcom voltage on the opposite inside glass sheet and that voltage is occasionally generated by a separate IC, which is more likely to cause issues.LED backlight with ceramic SMT caps are all solid state and should also have quite a long lifetime. I worry more about moisture/sun damage to the polarizer or LED light diffusion films/adhesives.Turn the power off in a cool/dry/dark place and you should be pretty good. Buy an Auto display and I'd put lifetime well over 20 years.

author: aranvaryt
author_rank: Newbie
timestamp: March 19, 2025, 12:41:56 pm
content: I have portable consoles R36S and Powkiddy Q80 they have LCD LED IPS panel display and I store them in the dark inside boxes unfortunately even using a dehumidifier I can't control humidity 57-68% and temperature 34-36C if I store without power and without use for years the LCD LED IPS display will lose backlight efficiency, loss of power and efficiency of the LEDs, the liquid crystal will generate dead pixels and LCD slowness problems

author: joseblo
author_rank: Newbie
timestamp: March 19, 2025, 06:10:24 pm
content: Dead pixels mean dead TFT (Thin Film Transistor) this is unfixable and caused by bad manufacture. Dead lines/columns mean bad FPC contacts, likely caused by temp/humidity and likely unfixable. Dim backlight or visible illumination streaks mean bad LED contacts is likely fixable. "Slow" display would probably mean a bad Vcom contact/connection is possibly fixable. Dark edges or "mold" would likely be damage to adhesive/films caused by humidity, fix requires delaminating the display.

author: aranvaryt
author_rank: Newbie
timestamp: March 19, 2025, 06:22:35 pm
content: Will long-term storage (years) in the conditions mentioned above and without using this IPS LED LCD display cause all the problems you mentioned? Is it possible to store it without using it only in perfect conditions (25C 50%)?There are also LEDs, I don't know if they are organic and if stored for a long time without use they weaken.

author: joseblo
author_rank: Newbie
timestamp: March 21, 2025, 06:25:12 am
content: Certainly, lots of monitors, TVs, and consumer items sit in warehouses that are hot/cold/humid for a year before sending them on a container ship for a month, to be delivered by a truck in the summer to sit on a shelf for months, before they're ever sold. Those and <0.1% failure rate of all causes. Automotive displays can sit in cars for 20 years and still work freezing and cooking for months every year and working every day.Most (>90%) of LCD displays are good for 5-10 years in reasonable storage conditions <50C <80% RH. The higher quality the display, and the closer to 25C and <50%RH the better.

author: aranvaryt
author_rank: Newbie
timestamp: March 24, 2025, 11:09:32 pm
content: Here the temperature where I live is between 35-36C humidity 58-68%an IPS LED LCD display stored for a long time in these conditions and without use, the LEDs and backlight of the display of this portable device will lose efficiency, the liquid crystal will develop dead pixels and other problems in the LCD?

author: aranvaryt
author_rank: Newbie
timestamp: March 27, 2025, 08:43:35 pm
content: What is the good temperature range for long-term storage of TFT LCD IPS LED backlight displays? Do manufacturers have a range or does it vary greatly between manufacturers? And what is the maximum humidity without presenting risks?I do not know the models and manufacturers of the R36S and Powkiddy Q80 displays? this consoles uses 3.5" IPSHave you ever seen the LCD slow down and become complacent after years of storage? Has the problem been resolved or is it permanent on the display?

author: hexreader
author_rank: Frequent Contributor
timestamp: March 30, 2025, 01:54:20 pm
content: Quote from: aranvaryt on March 24, 2025, 11:09:32 pmThat is very strange weather for New York.That seems much more like the kind of weather you would expect in Northeast BrazilAre you really from New York Gamer87?