Visibility on outdoor bikes

In general, it might not be the best idea to use an OLED for the permanent display of largely static content, as sooner or later you will have the problem of burn-in.

Regarding the readability of the screen under bright sunlight: I only use the Epix on my wrist and have also configured it so that during activity the screen only switches on by turning my wrist, which is sufficient for me here.

The automatic brightness control is good, and the screen is still visible even in midsummer. Yes, it will appear a little darker, but you can still read it without having to go into the shade. The Fenix would certainly have been better for a permanently switched on display and best readability under sunlight.

However, I would prefer a separate bike computer for cycling. 

If you don’t like to push the light button to get high brightness on the screen, it’s the wrong watch for your usecase. 
If it’s in direct sunlight you will hardly see the dimmed information/map on the screen. 

My opinion: because of the kicking in auto dimming, the EP51 is not a good choice, if you place it on the handlebars.

I have the same problem, and there is another older thread about this. The watch itself is advertised for cycling activities too, so there should be a way to make it perfectly visible on the handlebar. Most of the times I have to nudge it in order to make it visible. This is when I miss my old MIPS display the most.

Pixel burn-in is a thing of the past.. I wouldn't worry about it, especially in this case.

I believe there should be an option to have the display lit all the time. It would severely cut battery time, but that could be ok for an informed customer. 

pistapoci said:

Pixel burn-in is a thing of the past.. I wouldn't worry about it, especially in this case.

Sorry, pistapoci, but burn-in is not a relic of the past.

All actively glowing display elements are affected.

In the past, this was the phosphorus layer in tube monitors.

LCD has provided a solution here because the display does not light up itself, but relies on a backlight (or, in the case of transreflective LCDs, on the ambient light).

With plasma screens you had the problem again because, just like with tube screens, a phosphor luminous layer in the plasma cells is used.

And the problem also occurs with OLEDs, as the “organic” phosphor wears out over time and therefore becomes weaker.

I can show you the dark shadows on my smartphone display that are burned into the OLED as I used it as a bike sat nav for a long time.

Garmin itself points out this problem with its watches with OLED and also gives IQ developers clear guidelines to avoid this.

Merci à tous pour vos réponses.
Je pense que j'ai fait une erreur en vendant ma Fenix ​​7X.
L'Epix a un bel écran mais beaucoup de contraintes.
Je fais beaucoup de sport en extérieur et j'ai besoin d'un écran qui reste allumé sans avoir à tourner le poignet.
Pour le vélo, je ne vais pas acheter de calculateur supplémentaire, sachant que l'Epix doit normalement être multisport (vélo de route, VTT......).
Je pense vendre ma Fenix ​​Epix 51 et revenir à un écran MIP amélioré, peut-être le Fenix ​​8.

The Epix watches display are not designed to work when off the wrist, it clearly states this the manual and also in the blurb on the handle bar watch mount 

I think visibility depends strongly on the viewing angle, I.e. where your eyes are relative to the watch face. The steeper it is, the more likely you will have visibility problems because of a light source above. I have no issues reading the watch face on my bike despite having the small Epix Pro Saphire (47mm). But  I mount it on the Garmin Edge Holder that came with my cyclocross bike, using the Garmin Quick Fit. This places the watch further away from me than if I was to strap it directly to the handlebar, thus, creating a smaller angle. Maybe that’s the reason why it works quite well for me. At least well enough that I don’t feel the need to buy another device.

i also limit the amount of displayed items per screen to make them appear larger. For me the standard screen shows speed, distance, climb and DI2 gears. I have heart rate gauge (don’t have a power meter yet) and timer on a second screen but rarely look at it. Mainly because of the annoying issue that I cannot use DI2 buttons to switch pages on the Epix pro (as opposed to the edge)…

Epix Pro here It works just fine. I use it on a regular basis in all light conditions. The dimming is a fact but not an issue. BTW, we are taking about rifding a bike, not flying a jet with Mach 2 through a canyon!