use garmin nuvi as a tft display factory

I did a side-by-side comparison of the Colorado 400t and 76CSx at the Garmin site and found that the 76 has a "256 color transflective TFT" ("thin film transistor" for those curious folks) display with 160x240 pixels and measuring 4.1 x 5.6 cm. The Colorado has a "transflective color TFT" display with 240x400 pixels and measuring 3.8 x 6.3 cm. The number of color levels is not specified.

BTW, the Colorado manual that comes with the unit specifies "Display: 1.53" x 2.55" backlit color TFT display (240 x 400 pixels) backlit." For the 76CSX the manual reads "Display: 1.5" W x 2.2" H, 256-color, high resolution, transflective (160 x 240 pixels) with backlighting." My original post was based upon what I read in the printed Garmin Colorado manual, not on the website information. Which one can you trust?

I"m not going to speculate on how these displays differ since I"m not a display engineer. The thing I do know is that when both are side-by-side outdoors viewing the same map information, the Colorado is dimmer. So far, I have not been able to find any setup parameters that allow the map backgrounds to be changed. There is a display background that can be selected, but this does not show up in the maps.

Hmmm. Just found that if I deselect the topo map (map>options>select map) and just view city navigator, the green background turns to gray and the two displays are more evenly matched. This is in moderate roomlight. I normally run my 76CSx with the topo disabled, since it takes more time to load the maps at startup. I find the need to switch back and forth between map sets to be annoying.

As for Colorado bashing, I"m willing to give Garmin time to make things right. I said that in the original post. It has great potential. I bought mine and will keep it, thank you.

As far as being ignorant about the topic, I have spent the past 27 years working with lasers and electro-optical systems including high resolution space based CCD imaging systems. I know a bit about this stuff but never claim to be an expert. Some differences are quantitative, others are qualitative. Screen brightness is qualitative. I would like to see ALL the detail on the screen. It takes brightness and contrast to do this.

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The Garmin Nuvi 65LM GPS, model number 010-01211-01, was released by Garmin in January 2014. This model is available in black and comes with a matching suction-cup mount, vehicle charging cable, and USB cable. It also comes preloaded with maps of the lower 49 states that can be updated for free.

Compared to other Garmin GPS models, the 65LM has a larger diagonal screen size of 6.1 inches that can be rotated for use vertically and horizontally. It also has a white-backlit WVGA color TFT touch screen with sharper graphics. For its size, it has a relatively light weight of 8.6 ounces. Special features of the 65LM include the "Up Ahead" which locates ATMs, restaurants, and gas stations along the route, an alert system which warns you of approaching school zones, and the lane assist which helps with navigation at junctions.

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nüvi 58LM features sleek styling and a bright, 5.0-inch dual-orientation display, for use horizontally or vertically. Its included suction cup mount keeps it firmly in place.

nüvi 58LM arrives pre-loaded with detailed maps of Europe. With free lifetime map updates, your routes are sure to reflect the most up-to-date maps, points of interest (POI) and navigation information available. New maps are available for download for the useful life of your sat nav, with no fees.

nüvi 58LM redefines “spoken turn-by-turn directions” with Garmin Real Directions, easy-to-understand driving directions that guide like a friend using recognizable landmarks, buildings and traffic lights. No more stress from trying to read street names. Instead, hear clearly spoken guidance, like “Turn left after the petrol station.”

nüvi 58LM makes it easy to find addresses and millions of POIs (points of interest) – that is, businesses, stores, restaurants or other destinations. Our POI database also includes accurate, relevant information sourced from Foursquare. Now, when you search, the most relevant Foursquare result appears at the top of the list. It’s an easy way to discover new and popular restaurants, shops and more.

The Direct Access feature simplifies driving to select complex destinations, like airports and shopping centres, by finding a place within a larger location. Direct Access even navigates through car parks to find the entrance nearest your destination. When driving to the shopping centre, Direct Access gives additional location information for specific retail stores inside.

nüvi 58LM has a search field that makes it easy to find addresses and millions of POIs, in a single place. Now, simply enter a category (like “pizza”), an entire address or a proper name (“Starbucks”) and nüvi 58LM quickly returns your results.

No need to search for a hard-to-read or nonexistent sign; with a glance at nüvi 58LM, you’ll see your current street. nüvi also displays speed limit, current speed and arrival time.

With the Up Ahead feature, you can easily find places you want without leaving the map. As you drive your route, Up Ahead constantly informs you of nearby services, including food, fuel and ATMs. Best of all, Up Ahead is customizable, so you can always know the location of favourite destinations along the way.

nüvi 58LM contains our uniqueCyclops Speed Camera system, for real-time, direction-relevant and accurate alerts. The full safety camera database is already pre-loaded on your sat nav. However, you can get regular or one-off updates to ensure you always have the latest camera locations, so you can drive safely and legally

nüvi 58LM issues an audible alert and displays an onscreen warning whenever you approach a school zone. The displayed speed limit also changes to reflect the school zone speed limit.

For a complete navigation solution, nüvi 58LM pairs with theBC™ 30wireless backup camera (sold separately. Professional installation recommended). Once connected, you can easily see vehicles, pedestrians and other obstacles right on the nüvi display, as you move in reverse.

UseGarmin Expressto keep your nüvi up-to-date. Garmin Express makes it easy to update maps and software, transfer favorites to and from devices, and install free custom vehicles and voices.