Motorola Razr fold in half without a crease. The secret is in the hinge design – CNET

Motorola Razr fold in half without a crease. The secret is in the hinge design – CNET

As I get the new Motorola Razr open the foldable phone in my hand, all I wanted to do was, and close to it a thousand times. Not because I wanted to test, the screen or the durability (as with the Galaxy Flaps), but because what I was doing the whole time, if I have the of the original Razr flip phone in 2005

Plus, I was in the best place it to Motorola headquarters in Chicago. Specifically, toured I was a lab filled with industrial machines used to test and build the foldable screen of the phone. On the one hand, the laboratory-there were hand to track in writing the measurements scribbled on a wall as markers, to a child, the growth. In addition, a threatening machine was used to drop the Motorola Razr repeatedly to test the durability. My guess is that the measurements in the different heights Motorola dropped the phone. Also, I wondered if I should be wearing safety glasses.

It was at the beginning of November and I was at Motorola, as the joint was designed on his new Razr, and implemented, to be iterated. If the Razr flip-screen is the star of the show, then the hinge of the stage manager is all of the work.

This is the hinge for the Motorola Razr. It allows you to open the screen and close, without grooves, and prevents the phone from a gap when closed.

Patrick Holland/CNET

So I drove by the lab, I held the Razr open and close with my thumb. The “thud” sound, it was not exactly the same as the original, but still, it was immensely satisfying.

Hiding the folding screen dome

Motorola wanted a plug-in cards and a slim, foldable phone, which is not a permanent wrinkle down the middle of the screen. One of the biggest hurdles that was overcome, how would work the display. Flexible displays are made of thin plastic, and limited, how far can you bend before it breaks, or grooves.


I consider the Razr foldable screen.

Patrick Holland/CNET

After years of experimentation, Motorola determined exactly how far it will bend a screen could, without a wrinkle. It is similar to how you fold a piece of paper in half. If you fold it all the way, it is the cause of wrinkles. But if you have a curve in the crease instead of, most of the paper flat, and it is not a fold. Plastic flexible screens are up to the point where you have a fairly tight curve. The trade-off is the integration of the display, the curve in the chassis of the phone.

Huawei Mate X

the display on the outside and fills the curve of the fold with the body.

Andrew Hoyle/CNET

Huawei solved the display curve problem by your screen on the outer side of the Mate X. in Essence, the tablet, the body fills the gap in the fold curve like a taco shell.

Similar to Motorola, Samsung Galaxy you fold the display to the inside more like a book. But in contrast to the Razr closes perfectly flat, the wrinkles, has an open space between the two halves. If you fold a side view of the Galaxy, you can see, your body follows the fold curve on the display.

samsung-galaxy-drawer new 3

If closed, the two halves of the Galaxy do not fold to sit flat, but rather a small, wedge-shaped gap.

Angela Long/CNET

Motorola has a different approach than the Samsung and built his cell phone to the house, the display is to fold curve. The result is a hinge that is built on the sides of the screen, in order to live space for the fold curve, when in the closed position. It is similar to a hinge design Motorola’s parent company Lenovo uses for its Yoga laptops.

Motorola Razr

is closed If the Razr, the ends of the screen to sit perfectly flat, without a gap.

Juan Garzon/CNET

Getting rid of the gap 

The Galaxy wrinkles and Motorola Razr have two very different designs. The flap opens to a regular size smartphone into a small tablet. The Razr, a smartphone in a pocket-friendly Form. Motorola wanted the Razr to sit perfectly flush in the closed position, without a gap between the curved ends of the screen. In contrast, when the flap is in the closed position, a wedge-shaped air gap.

in order To prevent a gap, Motorola used steel plates below the screen, go across the width of the phone. When the Razr is closed, the plates push out of the way to make room for the display of the teardrop fold. When the phone is open, it will help the plates to be pressed against the screen, they are completely flat.

steel When the Razr is open, the plates support and stiffening of the display. In the closed position, the panels slide out of the way to make room for the teardrop-display-tray.


The display has been positioned by a system of spring-cams to draw the edges, and then drag the flat of it completely. As you open and close the Razr, the screen actually moves up and down ever so slightly behind the phone’s chin.

The cams are made of hardened steel and have a diamond-like coating for durability. You think of these cams as the gears of a clock to measure. When the phone is in the vicinity, you can see the Cam move, how you open and close the Razr.

As I finished my day up on Motorola, I phone back. The Razr made a solid first impression on me. I have an appreciation for the level of problem-solving and engineering challenges, Motorola went through. But until the phone is in the hands of reviewers and customers, the durability of the screen and the hinge is still unknown. For example, the openings on the sides of the screen, where you can see the hinge cams seems susceptible to dust, crumbs and other small particles. The same concern applies to a space behind the display that can be seen when you open or close the phone.

Motorola Razr

When the phone is opened and is closed, you can see, a small room can behind the display. In actual use, open the phone takes a fraction of a second should provide the minimization of potential vulnerabilities.

Juan Garzon/CNET

photos and videos of the Razr is open in the middle or closed, can make the space behind the screen seems to be pretty exposed. In reality, the opening and closing of the phone takes a fraction of a second, and minimizes the chances of collecting small foreign bodies behind the screen. I’m looking forward to testing the Razr in depth, when it comes out in January.

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Motorola Razr foldable telephone: We go in-depth on the hinge


Released on Thu, 21 Nov 2019 11:30:00 +0000

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