Smart Interior Research: As Technologies like Interactive Starlight Headliner, Hidden Display and Surface Projection Are Launched, Automotive Interiors Become Ever More Intelligent

The Automotive Smart Interior Research Report, 2026 highlights the following:
New Interior Materials & Processes: Bio-based materials, recycled materials, carbon fiber materials, cooling coatings, POE leather, light-transmitting surface materials, smart fabrics, e-ink trim strips, crystal interiors, IMD process, IME process, TOM process, etc.
Smart interior Functions: starlight headliner, illuminated door panels, illuminated dashboards and other innovative interior lighting; electronic skin, electronic air outlets, hidden displays, transparent displays, surface projection, etc.
New interior materials, processes and smart interior functions of OEMs and suppliers.

Preface
In 2026, automotive interiors continue in-depth innovation centered on the "third living space". The wide application of new sustainable interior materials and the intelligence of interior components stand out as the two most prominent technical highlights.  

On one hand, dual-carbon regulations and healthy cabin demands have driven the mass production and application of recycled and bio-based materials, delivering multiple values including lightweight design, low VOC emissions and recyclability. On the other hand, sensing, display and flexible circuits are deeply integrated with interior substrates. Traditional trim panels, seats, ceilings, windows and other hardware have broken away from single decorative attributes and upgraded into interactive, perceptive, adaptive smart carriers, and have been implemented in two directions simultaneously.     

From the perspective of current layout by OEMs including Volkswagen, Audi, Mercedes-Benz, BMW, BYD, emerging brands and traditional Chinese independent automakers, the adoption of bio-based and recycled materials in vehicles has become a consensus. Meanwhile, their layout of intelligent, ambient interior configurations such as crystal components, starlight headliners, hidden displays, light-transmitting skins, electric air outlets and surface projection is very differentiated.   

Among these smart interior technologies, cutting-edge technologies hidden displays, surface projection and interactive starlight headliners have been launched in 2026.

I. Evolution of Starlight headliners: Scroll-type, Capacitive and Other Solutions Enhance Diverse Interactive Capabilities of Roof Interiors.

With the upgrading of cabin intelligence, traditional fiber-optic starlight headliners with only static light effects keep iterating, gradually deriving multiple technical solutions such as photosensitive ink, chip starry film, projection, light-transmitting leather, scroll type and capacitive type. Their functions have expanded from single ambient lighting to diverse interaction capabilities including electric adjustment, gesture touch control, custom screen, and IVI linkage.

Currently, mainstream technology paths for starlight headliners have distinct characteristics

Traditional fiber-optic starlight headliners adopt LEDs paired with optical fiber light guides to achieve dynamic meteor light effects, represented by Rolls-Royce Wraith and MAEXTRO S800.
Photosensitive ink starlight headliners rely on laser-engraved photosensitive ink patterns on glass interlayers and side-mounted RGB light sources for illumination. Models such as BMW i7 and Yangwang U8 support multi-color dynamic light effects.
Chip starry films are equipped with independent light-emitting chips to individually control each star point, realizing complex dynamic effects such as breathing flicker and music rhythm.
Projected starlight headliners use vehicle-mounted projectors to cast patterns onto the ceiling.
Light-transmitting leather starlight headliners adopt light-transmitting leather paired with internal light guide plates to present customized luminous patterns.

New-generation intelligent starlight headliner technologies including scroll-type and capacitive type are mass-produced and applied in 2026.

Scroll-type Starlight headliner Representative: MAEXTRO V800

Launched in June 2026, MAEXTRO V800 is equipped with a scroll-type starlight headliner supporting custom screen, gesture interaction, and electric opening and closing.

Capacitive Starlight headliner Representative: HUAKETEK

On June 27, 2026, HUAKETEK unveiled its capacitive interactive starlight headliner for the first time. This innovative automotive product is built on the company’s self-developed silver nanowire core technology, supporting full-area capacitive touch, gesture control, and intelligent linkage with the IVI system. It can freely switch between multiple dynamic star scenes including the Milky Way, meteors and auroras, delivering delicate and uniform light and shadow without spots or dark zones.

The product relies on a precise capacitive touch recognition system to capture accurate 2D coordinates of finger touches in real time, accurately driving corresponding LED pixel units to adjust brightness. Tapping a region brightens stars, and a second tap restores them to the off state. It supports independent precise control of single stars or local star zones, with zero-latency interaction response and smooth light transition, enabling true two-way human-machine light and shadow interaction.
 
II. Mass Production of Hidden Displays: Automotive Displays and Interiors Integrate Perfectly.

Hidden displays realize seamless integration between vehicle screens and interiors. Their core feature lies in differentiated performance under off and on states: in the off state, screens fully blend into interior substrates, restoring native material textures such as wood grain, stone grain and metal, with color and gloss consistent with surrounding trim panels; in the on state, display areas render clear images while unlit dark zones retain original decorative textures, achieving seamless combination of tech screens and cabin aesthetics.

Hidden display technologies develop from concept to mass production and implementation in 2026.

In March 2026, SAIC Volkswagen ID.ERA 9X launched the Smart Surface Magic Screen. This innovative screen blends seamlessly with interiors when idle and lights up only when needed, offering a new design direction integrating safety, aesthetics and technology for automotive interiors. The hidden dashboard screen is supplied by Yanfeng, and rear door panel screens are provided by ADAYO.

The Smart Surface Magic Screen adopts microporous diaphragm technology, featuring the DFP film with innovative process. This diaphragm features a sandwich structure. The innermost layer is a transparent substrate that protects the screen and transmits light. The middle layer is a concealing layer to prevent edge light leakage. The outermost layer is a printing layer that displays wood grain patterns. The concealing and printing layers are covered with micron-scale tiny holes drilled by laser punching equipment to allow light to pass through directly.    

Suppliers inside and outside China have launched mature hidden display solutions, covering multiple technical routes such as Mini LED backlight, IMD/IML in-mold injection molding, silver nanowire touch control and gravure texture printing. These solutions adapt to various interior materials such as wood grain, metal, leather and fabric.

III. Implementation of Surface Projection: Project Information onto Interior Surfaces Including Door Panels and Dashboards.

Amid the design trend of "removing physical screens and integrated minimalist interiors", automotive surface projection has become a core technical branch of hidden smart surfaces. Its core logic is to eliminate independent physical displays, cast images, light effects and prompt information directly onto original interior surfaces such as door panels, dashboard and ceiling via the projection module, balancing interior material integrity and dynamic interaction capabilities.   

Launched in April 2026, the Cupra Raval features DLP side projection lighting technology on interior door panels. This DLP projection technology miniaturizes automotive-grade DLP optical machines and innovatively employs a side projection optical path: the projection module is concealed on either side of the dashboard, and the light optimized by the optical system is projected laterally onto the special material surface of the door trim strip, creating a uniform, dynamic, planar light and shadow effect.     

Compared with traditional LED light strips (point/line light sources with scattered light and single colors), DLP projection boasts three core advantages:
Planar light source presentation: breaks point/line limitations to form complete light surfaces on door panels with uniform light and no dark zones, over 5x higher contrast ratio and richer color saturation than traditional LEDs.
Dynamic interaction capabilities: micro-mirror flip speed reaches microsecond levels; supports smooth animations above 60fps that adjust light effects and patterns in real time with driving modes, music rhythm and vehicle status.
Hidden layout: optical machines are fully concealed inside interior structures with no exposed light sources, preserving interior simplicity and delivering a premium visual effect of "light appears upon surface". 

Major suppliers laying out in-vehicle surface projection include Appotronics and Forvia.

Appotronics’ front row smart surface deploys a miniature projection device to project required content onto the copilot seat smart surface without extra physical screens, effectively saving interior space for a more compact and spacious layout. Clear, precise projection can be realized on both flat and curved surfaces.

Forvia’s self-developed AirVision Floating 3D Projection Display System abandons traditional physical screens and generates floating 3D images directly on the dashboard surface. Optical design makes content appear suspended in mid-air without physical support, innovatively integrating display, lighting, interior surface and architecture. This technology is scheduled to be mass-produced and implemented in 2027, first installed on luxury passenger cars.