Automotive Tier-I supplier giant Visteon's big show-stopper at the 2020 CES was an instrument panel display screen that can bend around the driver, cockpit-style, in sport mode, then flatten out for more relaxed drives when you might want to share the screen content with your co-pilot.
The two technology drivers that allow this concept to work are a patented hinge design that allows the assembly to rotate along a prescribed path without straining the lens material, and the lens material itself, which is very thin, very strong glass (think Gorilla Glass or similar). The glass is sufficiently scratch-resistant, thin enough to bend without fracturing, and reportedly possesses the impact strength to meet head-impact crash-safety requirements.
This flexible rotating screen design supports multiple automotive display technologies, including a fresh one making its debut at CES 2020. Coming fairly hot on the heels of news that the 2021 Cadillac Escalade will feature a 38-inch curved OLED (organic light-emitting diode) screen, Visteon is introducing a technology promising similar performance at far lower cost. OLEDs are known for their deep, rich blacks; high contrast ratios; and amazing definition (Cadillac claims to match the 8K resolution of today's most-cutting-edge TVs). But Visteon notes that OLED displays present challenges in the hostile automotive environment, where they're far more likely to be subjected to vastly larger temperature swings, vibration, and sometimes persistent display images that can "burn-in" to the screen. Resolving these issues makes the displays very expensive.
Visteon's answer is to use a modified dual-cell liquid-crystal display (LCD) setup. LCD has a great track record in automotive use, but because it must be backlit, the blacks it can display tend not to be as black as an OLED screen can manage. Visteon's solution is to introduce what it calls "localized backlight luminance control." How localized? 300 microns, or about twice the width of a human hair.
An array of tiny uZone shutters ensures that the black areas stay black, while colors can pop with the brightness customers expect from their home TV screens. The rated contrast ratio is an impressive 84,000:1, the resolution of the screens on the demo dash were 2400x900 for the driver info display and 1888x1728 for the center screen, and Visteon claims that the overall optical quality of these screens vastly exceeds what is capable by other LCD screens at a price "far below what can be realized by OLED." We're also assured that the microshutter tech is mature and hardened for automotive duty.
Of course, operating those shutters presents an additional video-processing software challenge. A chip on each display splits the incoming video stream in two and applies a carefully constructed Image Signal Processing algorithm to the path that drives the uZone shutters. Having the processor mounted directly to the display prevents latency so that even live camera feeds look sharp and clear.
Visteon believes the auto industry will need to continuously invest in new technologies like this in order for its displays to meet the expectations set by the new televisions and smartphones their customers are continually exposed to.
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January 09, 2020 at 02:55AM
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Your Next Car Could Have a Bendable Screen Like This One - Motor Trend
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