Talk:Aperture grille

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At the size it appears in the article, the image "Aperture grille in close-up, showing the stabilizing wire" is too small for the stabilising wire to actually be visible. Jibjibjib 23:40, 27 October 2006 (UTC)


I don't believe that the image labeled "Comparison between aperture grille(left) and shadow mask(right)" is correct. The image also appears on the Shadow mask page. I think this is showing the difference in pixel geometry between a TV screen and a computer screen (probably both of which are shadow mask). Note that the image for the subpixels section of the pixel page is essentially the same image. The image summary also doesn't mention anything about shadow mask or aperture grille. Finally, for each aperture grille closeup, each pixel appears to be (more or less) arranged horizontally and vertically in a straight line, not "staggered" as they appear in the comparison picture. I don't have a aperture grille CRT to compare with, so can anyone else confirm this is correct? 129.21.100.202 02:16, 28 January 2007 (UTC)

I can confirm the above -- I was noticing comparison was wrong after looking at my own aperture grille CRT (19" Sony Trinitron). That photo is not showing the difference between aperture grille and shadow mask, rather between two kinds of shadow mask, one with rather large dots (Television) and one with smaller dots (CRT). I'm going to make a new comparison image and upload it, using either my own monitor or the images available on the page already. Trisweb 06:38, 13 February 2007 (UTC)
Ding, done. :-) Much better comparison image added. Trisweb 07:49, 13 February 2007 (UTC)

Perhaps it would be useful to show a non-inline type of shadowmask arrangement (three dots in a triangle). I believe I have a monitor of this type so will try to take that shot. Also, can we mention the Trinicon technology which was to some extent the Trinitron in reverse. Colin99 22:39, 18 February 2007 (UTC)

The stabilizing wires on a Trinoton-type monitor is mentioned separately two places in the article. Could someone try and merge those together? 217.144.249.82 12:51, 10 August 2007 (UTC)

!! The image marked "Image rendered by aperture grille" Clearly depicts a shadow mask, this is completely misleading. - J Edwards 27/4/08


dot triad and slot mask[edit]

The images of the shadow mask on this page are of the slot mask type. From what I've seen of those monitors, they have their electron guns arranged in a horizontal line like the Trinitron and other aperture grille CRTs.

The dot triad style of CRT has its electron guns arranged in a triangle. The slot mask was developed to produce a brighter image by blocking less of the energy from the electron guns like an aperture grille, while being no more expensive to produce than the dot triad style. In my personal experience I've found slot mask and aperture grille televisions to produce a less sharp picture than dot triad ones. This can be compensated for by using very fine masks in the slot mask or aperture grille styles.

I used to have a 13" Sony Trinitron TV that had a very visible single wire right across the middle. If I still had it I'd take a picture to illustrate an extreme case of bracing wire visibility.

There have been slot mask (don't know about dot triad) CRTs made with a perfectly flat face. They're produced by heating the mask beyond normal operating temperature then stretching it tight before either molding a heavy glass frame around its edge or gluing it between the body and face of the CRT. Whichever way they're made, the tube has to be much heavier than a conventional curved face CRT. —Preceding unsigned comment added by Bizzybody (talkcontribs) 08:26, 17 October 2007 (UTC)

Similarity to LCD RGB triads[edit]

There could be mention of the similarity of aperture grille displays to LCD monitors in terms of the look of the RGB triads. I recently switched from almost two decades of using Triniton monitors to an LCD, and found the visual difference surprisingly minor, partly due to this aspect. It should also be mentioned that despite the very similar appearance when magnified, the CRT is not like the LCD in one important aspect: being able to individually address sub-pixels. That is, even a single pixel of some color doesn't always illuminate the same number of sub-pixels, due to the analog nature of a CRT's horizontal scan. 72.48.75.131 (talk) 11:26, 27 November 2010 (UTC)