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{{Device Infobox
{{Device Infobox
|name = Epson Moverio BT-40
|image =
|image =
|VR/AR = [[Augmented Reality]]
|VR/AR = [[Augmented Reality]]
|Type = [[Head-mounted display]]
|Type = [[Smart Glasses]]
|Subtype = [[AR Glasses]]
|Subtype = [[Consumer AR]], [[Enterprise AR]]
|Release Date = 2021
|Platform = Host device dependent (USB-C)
|Price = $579
|Creator = [[Epson]]
|Display = 2 x Si-OLED binocular
|Developer = [[Epson]]
|Resolution = 1920x1080 per-eye
|Manufacturer = [[Epson]]
|Refresh Rate = 60 Hz
|Announcement Date = March 2, 2021
|Field of View = 34° diagonal
|Release Date = March 2021
|Horizontal FoV =  
|Price = $579 (BT-40), $999 (BT-40S with controller)
|Vertical FoV =  
|Website = https://www.epson.com/
|Diagonal FoV = 34°
|Versions = Moverio BT-40, Moverio BT-40S
|IPD Range =  
|Requires = USB-C compatible device (phone, PC, etc.)
|Predecessor = [[Epson Moverio BT-300]]
|Successor = None announced
|Operating System = Host device dependent
|Chipset = N/A (display glasses)
|CPU = N/A (host device)
|GPU = N/A (host device)
|HPU =
|Storage = N/A (host device)
|Memory = N/A (host device)
|SD Card Slot = No
|Display = Dual Si-OLED (Gen 4)
|Subpixel Layout = RGB stripe
|Peak Brightness = Not specified
|Resolution = 1920 × 1080 per eye (Full HD)
|Pixel Density = N/A
|Refresh Rate = 60Hz
|Persistence = Low persistence
|Field of View = 34°
|Horizontal FoV = ~34°
|Vertical FoV = ~19°
|Average Pixel Density = N/A
|Peak Pixel Density = N/A
|Foveated Rendering = No
|Optics = Proprietary projection optics
|Ocularity = Binocular
|Ocularity = Binocular
|IPD Range = Not specified
|Adjustable Diopter = No (prescription lens inserts available)
|Passthrough = Native see-through (transparent display)
|Tracking = 6DoF (IMU + camera based, BT-40S only)
|Tracking Frequency = N/A
|Base Stations = None
|Eye Tracking = No
|Face Tracking = No
|Hand Tracking = No
|Body Tracking = No
|Rotational Tracking = Yes (9-axis IMU)
|Positional Tracking = Yes (BT-40S with controller)
|Update Rate = 60Hz
|Tracking Volume = N/A
|Play Space = Mobile AR
|Latency = <50ms
|Audio = No (headphones required)
|Microphone = No
|3.5mm Audio Jack = No
|Camera = 5MP camera (BT-40S controller)
|Connectivity = USB-C (DisplayPort Alt Mode)
|Ports = USB-C
|Wired Video = Yes (USB-C DP Alt)
|Wireless Video = No
|WiFi = No (in glasses)
|Bluetooth = No (in glasses)
|Power = Powered by host device (USB-C)
|Battery Capacity = N/A (BT-40), controller has battery (BT-40S)
|Battery Life = N/A (host powered)
|Charge Time = N/A
|Dimensions = Glasses: ~191mm × 178mm × 25mm
|Weight = ~95g (glasses), ~185g (controller)
|Material = Plastic, polycarbonate
|Headstrap = None (glasses temples)
|Haptics = No
|Color = Black
|Sensors = 9-axis motion sensor (accelerometer, gyroscope, magnetometer), ambient light sensor
|Input = Host device controls, controller (BT-40S)
|Compliance = FCC, CE
}}
}}


'''Epson Moverio BT-40''' is an [[augmented reality]] [[head-mounted display]] released in 2021.
The '''Epson Moverio BT-40''' is a pair of see-through [[smart glasses]] developed by [[Epson]], announced on March 2, 2021, and released in March 2021 at a price of $579 ($999 for the BT-40S variant with intelligent controller). Representing Epson's fourth generation of Moverio smart glasses, the BT-40 delivers a significant upgrade over the BT-300 series with full HD 1080p resolution per eye using Gen 4 Si-OLED technology—a 225% field of view increase from the previous generation's 23° to an impressive 34°, equivalent to viewing a 120-inch screen from 15 feet. Designed as a lightweight display solution that connects via USB-C to compatible smartphones, tablets, and computers, the BT-40 targets applications ranging from personal entertainment and drone piloting to enterprise documentation and training. The BT-40S variant adds an intelligent controller with built-in camera, GPS, and processing capabilities for standalone AR applications.


== Specifications ==
== History and Development ==
* '''Display:''' 2 x Si-OLED binocular
* '''Resolution:''' 1920x1080 per-eye
* '''Refresh Rate:''' 60 Hz
* '''Field of View:''' 34° diagonal


* '''Price:''' $579
=== Moverio Heritage ===
Product line evolution:
* BT-100 (2011) - First generation
* BT-200 (2014) - Consumer focused
* BT-300 (2016) - Lighter design
* BT-40 (2021) - HD resolution
 
=== Si-OLED Technology ===
Display innovation:
* Epson proprietary technology
* Silicon OLED microdisplays
* High contrast
* Compact size
 
=== March 2021 Announcement ===
Product reveal:
* Full HD resolution
* 34° field of view
* USB-C connectivity
* Consumer and enterprise
 
=== Market Positioning ===
Target applications:
* Personal entertainment
* Drone FPV viewing
* Enterprise training
* Professional applications
 
== Design Philosophy ==
 
=== Display-Only Simplicity ===
Focused approach:
* High-quality display glasses
* Host device dependency
* Lightweight design
* Simple operation
 
=== USB-C Universal ===
Wide compatibility:
* Single cable connection
* Power from host
* DisplayPort Alt Mode
* Cross-platform
 
=== Enterprise Ready ===
Professional use:
* Documentation viewing
* Training applications
* Field service
* Drone operations
 
== Display Technology ==
 
=== Gen 4 Si-OLED ===
Advanced display:
* '''Resolution''': 1920 × 1080 per eye
* '''Type''': Silicon OLED
* '''Size''': 0.45-inch panels
* '''Contrast''': 500,000:1
 
=== Full HD Per Eye ===
High resolution:
* 1080p each eye
* Binocular 3D capable
* Sharp text
* Detailed images
 
=== Virtual Screen Size ===
Immersive viewing:
* Equivalent to 120" screen
* 15 feet viewing distance
* Private viewing
* Large virtual display
 
=== Si-OLED Advantages ===
Technology benefits:
* High contrast ratio
* Deep blacks
* Vivid colors
* Power efficient
 
== Field of View ==
 
=== 34° Diagonal FOV ===
Significant improvement:
* 225% larger than BT-300
* Previous: 23°
* Current: 34°
* Major advancement
 
=== Virtual Display ===
Practical viewing:
* Focused content area
* Document viewing
* Video watching
* Information display
 
== Optical System ==
 
=== See-Through Design ===
Transparent display:
* Real-world visible
* AR capability
* Environmental awareness
* Safety maintained
 
=== Optical Quality ===
Clear imaging:
* Minimal distortion
* Good color
* Transparent overlay
* Professional grade
 
== Connectivity ==
 
=== USB-C DisplayPort ===
Universal connection:
* Single cable operation
* Power delivery
* Video input
* Wide compatibility
 
=== Device Compatibility ===
Supported hosts:
* Android smartphones (DP Alt)
* Windows PCs
* Mac computers
* USB-C tablets
 
=== Simple Operation ===
Easy use:
* Plug and display
* No additional setup
* Mirror or extend
* Immediate use
 
== Physical Design ==
 
=== Lightweight Construction ===
Portable design:
* '''Weight''': ~95g (glasses only)
* Comfortable wear
* Extended use capable
* Portable
 
=== Glasses Form Factor ===
Wearable design:
* Temple-mounted
* Over-ear fit
* Adjustable nose pad
* Glasses compatible
 
=== Build Quality ===
Durable construction:
* Quality plastics
* Polycarbonate lenses
* Professional finish
* Reliable design
 
== Sensors ==
 
=== 9-Axis Motion Sensor ===
Orientation detection:
* Accelerometer
* Gyroscope
* Magnetometer
* Head tracking capable
 
=== Ambient Light Sensor ===
Automatic adjustment:
* Environment sensing
* Display optimization
* Comfort enhancement
* Power management
 
== BT-40S Variant ==
 
=== Intelligent Controller ===
Enhanced functionality:
* Separate processing unit
* Android-based
* Standalone capabilities
* Additional sensors
 
=== Controller Specifications ===
Smart controller:
* '''Weight''': ~185g
* '''Camera''': 5MP
* '''GPS''': Integrated
* '''Battery''': Built-in
 
=== 6DoF Capability ===
Advanced tracking:
* Camera-based tracking
* Position awareness
* AR applications
* Enhanced functionality
 
=== Standalone Operation ===
Independent use:
* Android applications
* AR content
* No phone required
* Complete solution
 
== Use Cases ==
 
=== Personal Entertainment ===
Consumer use:
* Private movie viewing
* Gaming display
* Travel entertainment
* Personal screen
 
=== Drone Operations ===
FPV applications:
* First-person view
* Flight monitoring
* Hands-free operation
* Aerial photography
 
=== Enterprise Training ===
Professional applications:
* Procedure guidance
* Documentation access
* Hands-free reference
* Field service
 
=== Medical Applications ===
Healthcare use:
* Patient information
* Procedure guidance
* Training support
* Documentation
 
== Audio ==
 
=== No Built-In Audio ===
Headphones required:
* 3.5mm from host device
* Bluetooth headphones
* External audio
* User choice
 
== Comparison with BT-300 ==
 
{| class="wikitable"
|-
! Feature !! Moverio BT-40 !! Moverio BT-300
|-
| Price || $579 || $699 (at launch)
|-
| Resolution || 1920×1080/eye || 1280×720/eye
|-
| FOV || 34° || 23°
|-
| Weight || ~95g || ~69g
|-
| Connection || USB-C || HDMI/USB
|-
| Display Tech || Gen 4 Si-OLED || Si-OLED
|-
| Controller || Optional (BT-40S) || Included
|}
 
== Comparison with Competitors ==
 
{| class="wikitable"
|-
! Feature !! Epson BT-40 !! Nreal Air !! Rokid Air
|-
| Price || $579 || $379 || $449
|-
| Resolution || 1920×1080 || 1920×1080 || 1920×1080
|-
| Display Type || Si-OLED || Micro-OLED || Micro-OLED
|-
| FOV || 34° || 46° || 43°
|-
| Weight || ~95g || 79g || 83g
|-
| See-Through || Yes || Yes || Yes
|}
 
== Strengths and Limitations ==
 
=== Strengths ===
* Full HD 1080p per eye
* 500,000:1 contrast (Si-OLED)
* 34° FOV (225% improvement)
* Lightweight (~95g)
* USB-C universal connectivity
* See-through design
* Enterprise-ready
 
=== Limitations ===
* Narrower FOV than competitors
* No built-in audio
* No integrated tracking (BT-40)
* Higher price than consumer alternatives
* Requires USB-C DP Alt Mode
* Limited standalone capability
 
== Technical Specifications Summary ==
 
{| class="wikitable"
|-
! Specification !! Details
|-
| Display || Dual Si-OLED, 1920 × 1080 per eye
|-
| Contrast || 500,000:1
|-
| FOV || 34°
|-
| Refresh Rate || 60Hz
|-
| Connection || USB-C (DP Alt Mode)
|-
| Sensors || 9-axis motion, ambient light
|-
| Weight || ~95g (glasses)
|-
| Price || $579 (BT-40), $999 (BT-40S)
|}


== See Also ==
== See Also ==
* [[Augmented Reality]]
* [[Epson]]
* [[Head-mounted display]]
* [[Epson Moverio BT-300]]
* [[AR Glasses]]
* [[Smart Glasses]]
* [[Si-OLED]]
* [[Consumer AR]]
* [[Enterprise AR]]
 
== References ==
{{Reflist}}


[[Category:Devices]]
[[Category:Smart Glasses]]
[[Category:AR Glasses]]
[[Category:AR Glasses]]
[[Category:Head-mounted displays]]
[[Category:Consumer AR]]
[[Category:Enterprise AR]]
[[Category:Epson]]
[[Category:Si-OLED]]
[[Category:2020s AR]]
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