Owner: Mya P. Brown, Civic Continuum
Status: paper-stage feasibility specification
Evidence level: ordinary-physics architecture; no tested coupon, vehicle installation, certification, or road approval
Public disclosure: sanitized engineering brief; protected geometry, fabrication drawings, supplier terms, and patent-sensitive implementation details excluded
This ChromaSkin document was shared for Washington Clean Energy Testbeds / Michael Pomfret review. A related energy-system concept discussed in the same conversation is the Bicycle Energy Pod engineering concept, which covers a bicycle-scale energy recovery, storage, safety, and validation plan.
This project proposes a removable, programmable illuminated surface made from flexible optical or light-distribution elements mounted over a stationary curved panel. It does not presently establish a road-legal vehicle body display, optical camouflage, structural body replacement, autonomous signaling system, or certified lighting device.
The first defensible result is a 600 mm by 600 mm stationary coupon that demonstrates controlled appearance, bounded power and temperature, environmental sealing, fault-safe shutdown, and repairable modular construction.
The concept is separated into three layers:
These names describe system roles. They do not imply validated performance.
The baseline architecture uses established components:
Photonic fibers below roughly 300 micrometers have been woven into flexible display textiles in published research. This supports material plausibility, not automotive durability or certification.
The first coupon does not need high-resolution video. It needs independently addressable zones capable of repeatable color and intensity states.
For one illuminated segment, a first-order guided-power model is
$ P_{\mathrm{out}}(L)=\eta_c P_{\mathrm{LED}}e^{-\alpha L}, $
where:
A deliberately side-emitting fiber distributes part of the guided light over length. If the effective extraction coefficient is (eta), the emitted power per unit length is approximated by
$ q(x)=etaeta_cP_{mathrm{LED}}e^{-(alpha+eta)x}. $
Uniform appearance cannot be assumed. It must be designed by controlling source injection, fiber spacing, extraction treatment, reflectors, diffusers, and segment length. Coupon acceptance therefore uses measured luminance uniformity:
$ U_L= rac{L_{min}}{L_{mathrm{avg}}}, $
reported with the full luminance map. The initial engineering target is $U_L \ge 0.70$ within each intended uniform zone; this is a design target, not a claimed measured value.
Color error is measured rather than judged by eye. For commanded and measured color coordinates, the report records a standard color difference such as $\Delta E_{00}$. The exact acceptance threshold is frozen before testing.
For (N) independently driven channels,
$ P_{\mathrm{elec}}=\sum_{i=1}^{N}V_i I_i+P_{\mathrm{controller}}+P_{\mathrm{conversion}}. $
The optical-wall-plug efficiency is
$ eta_{mathrm{wall}}= rac{P_{mathrm{visible,out}}}{P_{mathrm{elec}}}. $
The coupon power budget must include drivers, conversion losses, controller consumption, sensors, and wiring—not LEDs alone.
For a battery or vehicle supply, energy over a duty cycle is
$ E=\int_0^T P_{\mathrm{elec}}(t)\,dt. $
Road-vehicle integration is excluded until the load can be evaluated against the vehicle electrical architecture, electromagnetic compatibility, protected circuit routing, and fail-safe power isolation.
Nearly all electrical power not emitted as useful external light eventually becomes heat. A conservative steady-state balance is
$ P_{\mathrm{heat}}=P_{\mathrm{elec}}-P_{\mathrm{visible,out}}, $
and a first thermal estimate is
$ Delta T approx P_{mathrm{heat}}R_{ heta,mathrm{system}}. $
Because solar loading can dominate electronics heat, the coupon test also uses
$ P_{\mathrm{solar,abs}}=\alpha_s G A, $
where (alpha_s) is solar absorptance, (G) is incident solar irradiance, and (A) is exposed area.
The system must trip to a non-illuminated safe state before adhesive, fiber, coating, connector, or substrate temperature limits are approached. Trip and restart thresholds require hysteresis and must be recorded in the audit log.
The display layer is non-structural and must not be credited with crash strength.
For a layer at distance (y) from a neutral bending axis with bend radius (R), the approximate bending strain is
$ arepsilon_b approx rac{y}{R}. $
The maximum permitted curvature must be set from the weakest layer’s allowable cyclic strain with a safety factor. Optical loss, delamination, conductor resistance, and visible uniformity are measured before and after bend cycling.
Thermal mismatch stress is screened using
$ \varepsilon_{\Delta T}=(\alpha_1-\alpha_2)\Delta T, $
where (alpha_1) and (alpha_2) are coefficients of thermal expansion for bonded layers. The coupon must demonstrate that its attachment and relief features prevent repeated temperature changes from concentrating strain at fibers, solder joints, and sealed penetrations.
For zone pitch (p) viewed at distance (d), the angular pitch is approximately
$ heta_papprox rac{p}{d}. $
The design is not advertised as a conventional high-resolution display unless measured modulation, contrast, viewing angle, and pixel/zone crosstalk support that claim.
The first prototype is intentionally low-resolution. Its success criterion is controlled surface appearance and safe operation, not cinematic imagery.
AURORA SURFACE OS must enforce:
| Failure | Observable effect | Control | Stop condition |
|---|---|---|---|
| Fiber fracture or bend loss | dark line or nonuniform zone | bend-radius limit, strain relief, optical map | uniformity below frozen limit |
| LED or driver short | localized heat/current rise | channel fuse/current limit/thermal sensor | overcurrent or temperature trip |
| Controller crash | stale or uncontrolled appearance | independent watchdog and hard dark state | watchdog event |
| Water ingress | leakage, corrosion, optical haze | sealed coupon and moisture indication | insulation or visual failure |
| Adhesive delamination | lifting, flutter, optical distortion | peel/cycle testing and redundant retention | any propagation beyond frozen defect size |
| Harness fatigue | intermittent channel or arcing risk | flex relief, protected connector, continuity monitoring | continuity instability |
| Sensor failure | unsafe thermal blind spot | plausibility checks and redundant critical sensing | invalid sensor state |
| Unexpected flashing | distraction or seizure hazard | content-rate limiter and stationary controlled venue | rate-limit violation |
| Road-light confusion | misleading signal | no-road rule and regulatory review | any proposed moving-road use |
Minimum test article:
No vehicle installation occurs during v1 testing.
Calibrate electrical power, surface temperature, and luminance measurements. Record uncertainty, calibration date, range, resolution, and reference equipment.
Sweep commanded intensity and color. Record electrical input, luminance map, spectral/color result, uniformity, crosstalk, and hysteresis.
Operate worst-case approved stationary pattern until the prespecified thermal equilibrium rule is met. Pass only if all materials remain below their frozen limits with margin.
Apply a controlled radiant or environmental-chamber load representing the approved test envelope. Do not extrapolate beyond the measured envelope.
Cycle the coupon between frozen radii. Re-measure optical attenuation, zone uniformity, insulation, and attachment integrity.
Use a defined spray or ingress procedure suitable for a non-certified engineering coupon. Never describe this as an IP rating unless an accredited test supports that rating.
Cycle between frozen non-destructive limits; inspect for condensation, delamination, optical shift, connector damage, and controller faults.
Measure conducted and radiated behavior with qualified equipment before any vehicle connection. This is pre-compliance work, not certification.
Open sensors, short or overload one protected channel using a safe test fixture, interrupt communications, corrupt a command, and force a controller reset. The required result is a bounded dark/fixed state and retained audit evidence.
Test only in a controlled stationary setting. Measure luminance versus ambient condition, viewing angle, glare, flicker, and pattern transition rate. Include independent human-factors review before expanding content capability.
Each test record contains:
A successful software replay is not a successful material test. A successful coupon is not a road-legal product.
In the United States, vehicle lamps, reflective devices, and associated equipment are governed in part by Federal Motor Vehicle Safety Standard No. 108, codified at 49 CFR 571.108. Other federal, state, local, electromagnetic-compatibility, distraction, advertising, and vehicle-modification rules may apply. International deployment would also require market-specific type-approval review, including applicable UNECE lighting-installation rules.
Therefore:
The stationary coupon is feasible on paper because every functional block—LED source, polymer optical guide, flexible substrate, sensing, current limiting, thermal protection, environmental sealing, and bounded controller—uses ordinary known physics and available engineering methods.
The project is not yet validated because the coupled system has not demonstrated:
The correct next claim is: a stationary, non-structural programmable optical-surface coupon is ready for detailed design review and bounded prototype planning.
Proceed from paper to coupon only when:
Stop if the design requires structural-body credit, obscures regulated lighting, cannot enter a dark safe state, exceeds the frozen thermal envelope, creates uncontrolled flashing/glare, or depends on unverified camouflage or other unsupported claims.
These references support the engineering method and prior-art boundary. They do not establish novelty, patentability, certification, or tested performance.
A preliminary search found earlier work on flexible fiber-optic light panels for vehicles, including U.S. Patent No. 9,927,087. That reference describes optical fibers arranged as flexible light-emitting panels, reflective and aesthetic layers, solid-state sources, curved or serpentine fiber paths, and automotive lighting applications. The broad proposition “put a flexible fiber-optic illuminated panel on a vehicle” therefore must not be represented as newly established here.
The development opportunity must instead be tested at the system level. Candidate differentiators for counsel and engineering review—not patent claims—include:
For a surface divided into (M) zones of area (A_j), the first system-sizing relationships are
\[A_{\mathrm{total}}=\sum_{j=1}^{M}A_j,\] \[P_{\mathrm{total}}=\sum_{j=1}^{M}P_j+P_{\mathrm{control}}+P_{\mathrm{conversion}},\]and
\[m_{\mathrm{surface}}=\sum_k \rho_k A_{\mathrm{total}} t_k+m_{\mathrm{sources}}+m_{\mathrm{harness}}+m_{\mathrm{mounts}},\]where (\rho_k) and (t_k) are the density and thickness of laminate layer (k). These equations are bookkeeping identities, not proof of acceptable vehicle performance. Their value is that every prototype must disclose the area, power, mass, and thermal cost it actually carries.
The next novelty review must be claim-by-claim and must search patents, published applications, products, papers, and public demonstrations before any assertion of patentability or exclusivity.