What kind of displays are these? - Page 1
Forum section: electronics / beginners

author: redgear
author_rank: Frequent Contributor
timestamp: July 30, 2020, 11:15:48 am
content: Are these oleds or 7 segment displays? I am not able to find a 7 seg display that looks nice like these.

author: sokoloff
author_rank: Super Contributor
timestamp: July 30, 2020, 11:22:16 am
content: They look like blue LED “clock” displays to me. Should be lots of choice off the shelf.Are you not finding the display you like or not finding a housing you like?

author: ledtester
author_rank: Super Contributor
timestamp: July 30, 2020, 11:59:19 am
content: The appearance of LED displays can be improved quite a bit by placing a color filter/diffuser in front of them:https://www.eevblog.com/forum/projects/optical-filter-in-front-of-led-display-where-to-find/https://youtu.be/weqgmmNwD9I

author: redgear
author_rank: Frequent Contributor
timestamp: July 30, 2020, 12:13:18 pm
content: Quote from: sokoloff on July 30, 2020, 11:22:16 amI am not able to find the displays. I only get the usual 7 segs that look ugly.Quote from: ledtester on July 30, 2020, 11:59:19 amThank you! Interesting, this would definitely make the 7 segs look better.

author: greenpossum
author_rank: Frequent Contributor
timestamp: July 30, 2020, 12:18:12 pm
content: Is that the largest image you can manage? They could also be blue VFDs.

author: redgear
author_rank: Frequent Contributor
timestamp: July 30, 2020, 12:29:36 pm
content: Quote from: greenpossum on July 30, 2020, 12:18:12 pmYep, I took a screenshot from google images.And I think I found out what I am looking for,https://www.eevblog.com/forum/projects/aesthetics-led-bar-graph-in-aluminium-panel/msg1210065/#msg1210065For green LEDs, I can use a gel filter.

author: sokoloff
author_rank: Super Contributor
timestamp: July 30, 2020, 02:10:51 pm
content: Quote from: redgear on July 30, 2020, 12:13:18 pmDid you search "blue led clock display"?I'm not sure what's ugly about some of the results I get when I do that.https://www.aliexpress.com/item/4000803444465.html

author: DrG
author_rank: Super Contributor
timestamp: July 30, 2020, 02:29:37 pm
content: Quote from: redgear on July 30, 2020, 11:15:48 amBased only on that small picture and no link to a product or project, I don't know how we can tell for sure. My first thought is like others who have already posted:https://www.adafruit.com/product/812https://www.diymore.cc/products/tm1637-4-digit-digital-led-0-36-0-36-inch-7-segments-display-tube-clock-module-led-board-for-arduino-with-pins-double-dots?_pos=2&_sid=d09e4b0d1&_ss=rBut, it could also be an OLED using a 7-seg graphics fonthttps://golemparts.wordpress.com/2014/09/28/my-lcd-obsession/

author: tooki
author_rank: Super Contributor
timestamp: July 30, 2020, 03:32:45 pm
content: Quote from: redgear on July 30, 2020, 12:13:18 pmCan you be specific about what it is you find ugly?

author: redgear
author_rank: Frequent Contributor
timestamp: July 31, 2020, 06:50:41 am
content: Quote from: sokoloff on July 30, 2020, 02:10:51 pmQuote from: DrG on July 30, 2020, 02:29:37 pmQuote from: tooki on July 30, 2020, 03:32:45 pmThe visiblity of unlit segments is what I found ugly. After going through the threads linked by ledtester in reply #2 and myself in #5, I have learnt that adding filter to the 7 segment display can make them look better just like in the image I posted first.

author: tooki
author_rank: Super Contributor
timestamp: July 31, 2020, 02:58:31 pm
content: Yep. 7-segment LED displays aren’t intended to be used without a filter. (The contrast is horrible without it.) That’s why they all look the same in that regard.