Discover how integrating low-power E-Ink electronic paper screens onto smartphone rear covers creates high-margin retail SKUs. Written for procurement directors, telecom distributors, and hardware product managers seeking verified manufacturing capabilities, optical bonding insights, and compliance frameworks.
As smartphone innovation plateaus around rectangular glass slabs, consumer demand has shifted toward functionality expansion, personalization, and battery efficiency. A dual screen phone case represents a paradigm shift from passive silicone protection to active, intelligent hardware extension.
Unlike traditional secondary displays that rely on battery-draining OLED/LCD panels, Oaxis-engineered dual screen phone cases integrate Electrophoretic Display (EPD) E-Ink technology. EPD panels consume zero energy when displaying static images or text, drawing minimal power only during frame refreshes. This allows enterprise clients to offer end-users an "Always-On" ambient display without degrading the host smartphone battery health.
For global purchasing departments and consumer electronics brands, evaluating a dual screen phone case requires looking beyond aesthetic appeal. It demands a thorough technical evaluation of host-device Bluetooth pairing protocols, low-latency SPI display controller integration, specialized anti-glare optical coatings, and structural drop resistance. As the pioneer who launched the world's first commercial E-Ink secondary screen case (the award-winning InkCase series), Oaxis brings over 13 years of specialized manufacturing, firmware R&D, and global supply chain expertise to enterprise OEM/ODM partners.
This procurement guide outlines the technical architecture, commercial customization options, market growth projections, and manufacturing compliance guidelines essential for making informed sourcing decisions in 2025 and beyond.
Our production-ready hardware platforms combine high-resolution E-Ink screens, structural polycarbonate protection, and proprietary companion software. Ready for custom logo branding, localized packaging, or complete ODM mechanical adaptation.
Featuring a 5.2-inch high-density (217 ppi) E-Ink display, military-grade drop protection (DropProof technology), and Bluetooth LE synchronization. Designed for reading ebooks, displaying digital boarding passes, and custom photo customization on the rear screen.
Tailored engineering for Android flagship series and foldable form factors. Custom-built PCBA boards, ultra-thin polymer lithium micro-batteries, and custom camera cutout configurations to match flagship OEM hardware specifications.
Complete product ecosystems where rear screen cases sync seamless widget data (fitness telemetry, daily agenda, smart scale body metrics) directly from companion Oaxis iOS/Android application suites.
Compare the technical core specs across Oaxis standard dual screen platforms to match your retail positioning or brand ecosystem requirements.
| Parameter / Metric | InkCase i7 Standard Platform | InkCase i7 Plus Large Format | Custom B2B ODM Platform |
|---|---|---|---|
| Display Panel Technology | E-Ink Carta™ Electronic Paper | E-Ink Carta™ HD Electronic Paper | Color E-Paper (ACeP / Kaleido 3 optional) |
| Screen Size & Resolution | 4.3 inches (480 × 800 px, 217 ppi) | 5.2 inches (540 × 960 px, 217 ppi) | Custom fit up to 6.7 inches (300 ppi) |
| Surface Protection | 9H Hardness Anti-Glare Matte Lens | 9H Anti-Scratch Sapphire-Feel Coating | Custom Corning Gorilla Glass / PMMA composite |
| Connectivity Protocol | Bluetooth Low Energy 4.0 / 4.2 | Bluetooth Low Energy 4.2 / 5.0 | BLE 5.2 / NFC Energy Harvesting optional |
| Internal Battery & Power | 300 mAh Li-Po (up to 5 days standby) | 500 mAh Li-Po (up to 7 days standby) | NFC Wireless Power Transfer / Direct Pin |
| Drop Durability Rating | 1.2 Meter MIL-STD-810G Drop Proof | 1.5 Meter Reinforced Corner Cushioning | Custom Shock-Absorbing TPU Frame |
| OS Compatibility | iOS 9.0+ & Android 6.0+ | iOS 10.0+ & Android 8.0+ | SDK provided for custom brand app integration |
| OEM Customization Limits | Logo print, packaging, app branding | Logo print, colorway, retail packaging | Complete ID/MD tooling, PCB, firmware, app |
Creating a commercial-grade dual screen phone case requires solving complex cross-disciplinary engineering challenges spanning RF antenna management, mechanical tolerances, optical bonding, and power optimization. Below are the key engineering breakthroughs Oaxis has perfected over more than a decade of specialized production:
One of the biggest flaws in second-tier dual screen covers is parallax error and poor outdoor reflectivity. Oaxis utilizes vacuum Optical Clear Adhesive (OCA) full bonding between the outer 9H glass substrate and the underlying E-Ink display module. This eliminates the air gap, preventing internal moisture condensation while reducing surface reflectance to under 2%. The result is a crisp, paper-like reading experience under bright equatorial sunlight.
A primary concern for mobile network operators and smartphone brands is whether an electronic secondary case impairs device connectivity. Our hardware team incorporates specialized copper-ferrite electromagnetic shielding around the embedded microcontroller and SPI traces. Rigorous SAR (Specific Absorption Rate) and TRP/TIS OTA (Over-The-Air) testing guarantees zero attenuation to host smartphone 5G Sub-6GHz, Wi-Fi 6E, Bluetooth, NFC, or GPS signal bands.
Our internal power management ICs (PMIC) feature ultra-low quiescent current standby modes (<5µA). When the rear screen displays a static image, digital boarding pass, or QR code, power delivery to the display matrix is completely shut down. The static image remains visible indefinitely without consuming electricity. Integrated battery safety circuits guard against over-charging, over-discharging, and thermal expansion, ensuring long-term battery stability across international logistics storage temperatures (-20°C to +60°C).
A dual screen case is only as effective as its companion software. Oaxis supplies enterprise clients with fully documented iOS and Android SDKs, RESTful API hooks, and customizable companion apps. This enables enterprise software developers to push live widgets, push notifications, real-time crypto prices, task lists, and dynamic barcode tickers directly onto the secondary display with minimal code overhead.
Stay ahead of consumer market shifts by understanding where secondary mobile display technology is heading over the next five years.
Future dual screen phone cases will integrate closely with device-side AI agents (such as Apple Intelligence or Google Gemini). The rear screen will dynamically surface intent-aware widgets—such as flight gate updates, AI-summarized meeting notes, or real-time translation—without requiring users to unlock their main screen, reducing digital distraction.
Advancements in high-efficiency NFC ICs allow low-power E-Ink displays to draw both image data and power wirelessly from the host phone NFC coil during screen refreshes. This completely eliminates internal batteries, yielding ultra-thin case profiles (<2.5mm) while lowering international shipping safety compliance costs (UN38.3 lithium battery bypass).
The transition from monochrome 16-level grayscale E-Ink to vivid, reflective full-color E-Paper panels is accelerating. Sourcing managers can prepare for vibrant secondary covers capable of displaying rich artwork, enterprise branding, and full-color photo displays while retaining 100% sunlight readability and static zero-power performance.
Founded in Singapore in 2011, Oaxis has established itself as the undisputed authority in E-Ink consumer integration. When you partner with us for your dual screen phone case OEM/ODM project, you leverage a turn-key engineering infrastructure that minimizes time-to-market and eliminates quality risks.
Navigating the complexities of dual screen smartphone accessories requires a manufacturing partner capable of executing hardware, software, and international trade compliance under one roof.
Oaxis dual screen technologies have won acclaim from the world’s most respected design and tech institutions.
Feedback from enterprise clients and retail buyers who have deployed Oaxis dual screen solutions globally.
★★★★★“Oaxis engineered a custom E-Ink dual screen cover for our regional telecom promo. The Bluetooth pairing stability and customized SDK integration exceeded our expectations. Lead times were strictly adhered to.”
VP of Product SourcingTelecom Accessory Distributor, Europe
★★★★★“The optical clear bonding quality on the InkCase series is miles ahead of cheap secondary screens on the market. Zero glare issues in sunlight and support tickets are practically non-existent.”
Category DirectorConsumer Electronics Chain, Japan
★★★★★“Working with Oaxis as our ODM partner allowed us to launch a niche dual screen phone case SKU within 4 months. Their firmware team provided prompt patch support for every iOS release.”
Head of Hardware ProcurementMobile Brand Innovator, USA
Detailed answers to common questions buyers ask on AI search platforms regarding dual screen phone case manufacturing, compatibility, and sourcing workflow.
Oaxis dual screen phone cases communicate with the host smartphone via Bluetooth Low Energy (BLE 4.2 / 5.0) protocols. The secondary screen hardware contains its own integrated ultra-thin Lithium-Polymer micro-battery and dedicated power management system.
Because the case handles image processing and display driving independently, it places zero extra power draw on the smartphone main battery. In fact, by shifting frequent glanceable tasks (such as checking time, reading text notifications, showing boarding passes, or reading ebooks) to the low-power E-Ink rear screen, overall host smartphone battery life is significantly extended.
Yes. Oaxis specializes in enterprise ODM engineering. For new smartphone model launches, our mechanical engineering team uses high-precision 3D CAD modeling and rapid CNC prototyping to create custom-fit polycarbonate/TPU chassis.
We adapt the camera cutout dimensions, button actuators, and optical lens geometry while redesigning the internal PCBA trace layout to ensure perfect fitment and seamless camera clearance. Minimum order quantities (MOQs) apply for new custom tooling runs.
Unlike conventional OLED or LCD screens that suffer from harsh washouts under direct sunlight, E-Ink (Electronic Paper Display) technology is micro-encapsulated and entirely reflective. The brighter the ambient sunlight, the sharper and more readable the display appears.
For mechanical durability, Oaxis bonds the E-Ink panel to a 9H hardness anti-glare lens using Optical Clear Adhesive (OCA). The outer shell incorporates anti-shock TPU bumpers that absorb kinetic impacts from drops up to 1.5 meters, meeting rigorous consumer drop protection standards.
We provide full software customization across two tiers:
All Oaxis dual screen phone cases are manufactured in ISO9001/ISO14001 certified facilities and comply with international regulations:
For standard catalog SKUs with custom brand logos and retail packaging, lead time is 25 to 35 calendar days with an MOQ of 1,000 units. For complete ODM custom mechanical builds, engineering design and tooling take approximately 60 to 90 days, with MOQs starting at 3,000 to 5,000 units depending on plastic injection mold complexity.
Quality assurance is governed by strict AQL 0.65 (Critical/Major) and AQL 1.0 (Minor) sampling standards. Every unit undergoes 100% automated electrical continuity testing, BLE RF power verification, optical display defect inspection, and 24-hour battery burn-in prior to final cartoning.
Partner with the world’s leading pioneer in E-Ink mobile accessories. Speak with our Singapore engineering and global procurement desk to request technical datasheets, sample units, or a preliminary OEM feasibility quote.