At the Google I/O event in 2025, the 'Project Moohan' smart glasses were unveiled, showing the infinite possibilities of augmented reality (AR) technology, causing a huge stir. This is not just the introduction of new hardware, but also contains Google's long-term vision to expand user experience like never before. Behind this innovative announcement, there were Google's meticulous preparations and patent acquisition efforts for numerous core technologies.
In order to read the flow of a company's technology development, it is essential to look at patent application trends. This is because patents are the most reliable measure of what a company is researching and developing, and what technology it will release to the market in the future. Conversely, by analyzing past patents, we can predict what technology will be implemented in the future and deeply understand the company's technology strategy. From now on, we will take a closer look at the major patents through which Google prepared to realize smart glasses, especially 'Project Moohan'.
Below are some patents related to the core technologies covered in Google's 'Project Moohan'. Each description includes the relevant patent number, so if you are interested, please refer to the relevant patent document.
Please note that Google Smart Glass incorporates a wide range of technologies, but due to space limitations, only some of these technologies can be covered.
Evolution of next-generation display and body technology
The core of the 'Project Infinite' smart glasses is the implementation of a display that is so natural and clear that the user does not even notice it. To achieve this, Google has been steadily developing various display and body-related technologies and improving the fundamental perfection of the hardware.
In the optical and display control context, Google has developed technology to compress and focus optical images through its optical device patent for a head-mounted display (HMD) [US 13/413228].
Figure 1. Planar view of a binocular HMD system (Hybrid polarizing beam splitter, US 13/413228)
This is an essential technology for accurately and clearly transmitting the projected image to the user's eyes. It also includes a technology that dynamically adjusts the intensity of light and the transmission/reflection mode according to the ambient light by controlling the liquid crystal display (LCD) with the light-emitting layer. This is the basic technology for providing the optimal visual experience even in various lighting environments.
Furthermore, a technology has been developed to control the ambient light and the transmission characteristics when switching to Day mode by applying an electrochromic glass layer to the camera [ US 15/339839]. This helps the camera of the smart glasses capture the best image under any lighting conditions. Also notable is the thin ceramic imaging screen technology that diffuses the incident light and focuses the light with the CMOS image sensor.
As for the frame and body design, since smart glasses are directly worn on the user's face, design, durability, and comfort are important. Google's various patents for decorative designs for eyeglass frames [US 29/480572, US 29/480587, US 29/535113, etc.] show that they took into account not only functionality but also aesthetic aspects.
Table 1. Examples of Glass-related design patents acquired by Google
In terms of power, a bidirectional battery controller system [US 18/262669] that controls the charge/discharge current and voltage of two battery cells within the smart glasses temples enables efficient power management. This system contributes to extending the usage time of the smart glasses by optimizing battery usage and minimizing power waste. The bidirectional charge/discharge function is a key technology that maximizes energy efficiency by controlling power flow in both directions as needed.
Figure 2. Schematic diagram of a pair of smart glasses with bidirectional, multi-battery charging and discharging (BIDIRECTIONAL BATTERY CHARGING AND DISCHARGING, US 18/262669)
Method and device for identifying a lens of a head-mounted device in connection with lens identification and correction [US 15/855596] patent includes technology for identifying a lens through a code representing the optical characteristics of the lens and controlling an image generator based on the code. This is an important technology for providing an accurate AR experience even when replacing lenses.
Figure 3. Example of a wearable device
(Methods and apparatus to identify lenses of head-wearable apparatus, US 15/855596)
Innovative user interface and interaction methods
Smart glasses require an intuitive and immersive user interface that is different from existing mobile devices. To achieve this, Google has been researching various input and output methods and seeking a more natural connection between people and devices.
for efficient text entry using multiple touch points [US 13/113725 ] and gesture-based messaging [US 14/221785 ], in relation to gesture and touch input, demonstrate the importance of easy interaction. In particular, a finger-tracking input sensor integrated into a wearable heads-up display [US 13/115430 ] provides a natural way to enter commands.
Figure 4. Schematic of a multiple touchpoint system ( Multiple touchpoints for efficient text input, US 13/113725)
Technology for identifying glass surfaces in a scene using a camera system and excluding them from motion detection [US 14/745230, US 15/432871] in relation to environmental perception and augmented reality helps AR content blend in naturally with the real environment. Technology for projecting a red overlay to enhance night vision using Google Glass [US 14/540522 ] is intended for visual assistance in special situations.
Extending user experience and integrating ecosystems
The ultimate goal of 'Project Moohan' is to expand user experiences through smart glasses and integrate seamlessly with various devices and services.
In the multi-device interaction category, Google has been granted a patent for technology to run software programs on multiple computing devices, display related data, and update them based on their physical locations [US 13/610099]. This allows smart glasses to work with other smart devices to provide a seamless experience. In particular, a method for performing device arbitration in a multi-device environment using wearable computing device data [US 17/166763 US 17/947458, US 18/642099] enables complex interactions that prioritize and assign content to specific devices based on the user's gaze direction or other inputs.
Technology for measuring the distance between a user and a display and dynamically adjusting the display resolution and magnification by determining presbyopia symptoms in relation to personalization and context awareness [US 13/666499, US 15/007082] maximizes visual convenience for each user.
Figure 6. Drawing illustrating different focal areas of the display for a user positioned at the center of the display
(Systems and methods for configuring the display resolution of an electronic device based on distance and user presbyopia, US 13/666499)
Google's 'Project Moohan' smart glasses are more than just a new wearable device; they reflect Google's ambitious plan to integrate information into users' daily lives and transform the way they interact. The numerous patents reviewed above clearly demonstrate Google's broad and deep preparation for this project, from display technology, body design, various input methods, intelligent environmental perception, and multi-device ecosystem integration.
These patents prove that Google has a long-term vision to expand users’ visual, auditory, and operational experiences beyond simple technology development. Smart glasses will be the core devices of the future that connect our lives, provide information, and allow us to interact with the world in new ways. Once again, the most reliable way to understand a company’s technology development roadmap and predict the future is to analyze the patents they file. Patent data is not just a legal document; it is a blueprint of a company’s technological ambitions and future strategies.
By Gihyeon Park
Patent Attorney, BLT Patent & law Firm www.en.blt.kr
#GoogleSmartGlasses,#ProjectMoohan,#ARtechnology,#AugmentedReality,#WearableTech,#TechInnovation,#FutureDevices,#PatentStrategy,#ARInterface,#UserExperienceDesign,#MultideviceIntegration,#GestureControl,#OpticalTechnology,#SmartWearables,#TechTrends2025,#HumanComputerInteraction,#VisualComputing,#DigitalTransformation,#AIandAR,#NextGenDisplay
At the Google I/O event in 2025, the 'Project Moohan' smart glasses were unveiled, showing the infinite possibilities of augmented reality (AR) technology, causing a huge stir. This is not just the introduction of new hardware, but also contains Google's long-term vision to expand user experience like never before. Behind this innovative announcement, there were Google's meticulous preparations and patent acquisition efforts for numerous core technologies.
In order to read the flow of a company's technology development, it is essential to look at patent application trends. This is because patents are the most reliable measure of what a company is researching and developing, and what technology it will release to the market in the future. Conversely, by analyzing past patents, we can predict what technology will be implemented in the future and deeply understand the company's technology strategy. From now on, we will take a closer look at the major patents through which Google prepared to realize smart glasses, especially 'Project Moohan'.
Below are some patents related to the core technologies covered in Google's 'Project Moohan'. Each description includes the relevant patent number, so if you are interested, please refer to the relevant patent document.
Please note that Google Smart Glass incorporates a wide range of technologies, but due to space limitations, only some of these technologies can be covered.
Evolution of next-generation display and body technology
The core of the 'Project Infinite' smart glasses is the implementation of a display that is so natural and clear that the user does not even notice it. To achieve this, Google has been steadily developing various display and body-related technologies and improving the fundamental perfection of the hardware.
In the optical and display control context, Google has developed technology to compress and focus optical images through its optical device patent for a head-mounted display (HMD) [US 13/413228].
Figure 1. Planar view of a binocular HMD system (Hybrid polarizing beam splitter, US 13/413228)
This is an essential technology for accurately and clearly transmitting the projected image to the user's eyes. It also includes a technology that dynamically adjusts the intensity of light and the transmission/reflection mode according to the ambient light by controlling the liquid crystal display (LCD) with the light-emitting layer. This is the basic technology for providing the optimal visual experience even in various lighting environments.
Furthermore, a technology has been developed to control the ambient light and the transmission characteristics when switching to Day mode by applying an electrochromic glass layer to the camera [ US 15/339839]. This helps the camera of the smart glasses capture the best image under any lighting conditions. Also notable is the thin ceramic imaging screen technology that diffuses the incident light and focuses the light with the CMOS image sensor.
As for the frame and body design, since smart glasses are directly worn on the user's face, design, durability, and comfort are important. Google's various patents for decorative designs for eyeglass frames [US 29/480572, US 29/480587, US 29/535113, etc.] show that they took into account not only functionality but also aesthetic aspects.
Table 1. Examples of Glass-related design patents acquired by Google
In terms of power, a bidirectional battery controller system [US 18/262669] that controls the charge/discharge current and voltage of two battery cells within the smart glasses temples enables efficient power management. This system contributes to extending the usage time of the smart glasses by optimizing battery usage and minimizing power waste. The bidirectional charge/discharge function is a key technology that maximizes energy efficiency by controlling power flow in both directions as needed.
Figure 2. Schematic diagram of a pair of smart glasses with bidirectional, multi-battery charging and discharging (BIDIRECTIONAL BATTERY CHARGING AND DISCHARGING, US 18/262669)
Method and device for identifying a lens of a head-mounted device in connection with lens identification and correction [US 15/855596] patent includes technology for identifying a lens through a code representing the optical characteristics of the lens and controlling an image generator based on the code. This is an important technology for providing an accurate AR experience even when replacing lenses.
Figure 3. Example of a wearable device
(Methods and apparatus to identify lenses of head-wearable apparatus, US 15/855596)
Innovative user interface and interaction methods
Smart glasses require an intuitive and immersive user interface that is different from existing mobile devices. To achieve this, Google has been researching various input and output methods and seeking a more natural connection between people and devices.
for efficient text entry using multiple touch points [US 13/113725 ] and gesture-based messaging [US 14/221785 ], in relation to gesture and touch input, demonstrate the importance of easy interaction. In particular, a finger-tracking input sensor integrated into a wearable heads-up display [US 13/115430 ] provides a natural way to enter commands.
Figure 4. Schematic of a multiple touchpoint system ( Multiple touchpoints for efficient text input, US 13/113725)
Technology for identifying glass surfaces in a scene using a camera system and excluding them from motion detection [US 14/745230, US 15/432871] in relation to environmental perception and augmented reality helps AR content blend in naturally with the real environment. Technology for projecting a red overlay to enhance night vision using Google Glass [US 14/540522 ] is intended for visual assistance in special situations.
Extending user experience and integrating ecosystems
The ultimate goal of 'Project Moohan' is to expand user experiences through smart glasses and integrate seamlessly with various devices and services.
In the multi-device interaction category, Google has been granted a patent for technology to run software programs on multiple computing devices, display related data, and update them based on their physical locations [US 13/610099]. This allows smart glasses to work with other smart devices to provide a seamless experience. In particular, a method for performing device arbitration in a multi-device environment using wearable computing device data [US 17/166763 US 17/947458, US 18/642099] enables complex interactions that prioritize and assign content to specific devices based on the user's gaze direction or other inputs.
Technology for measuring the distance between a user and a display and dynamically adjusting the display resolution and magnification by determining presbyopia symptoms in relation to personalization and context awareness [US 13/666499, US 15/007082] maximizes visual convenience for each user.
Figure 6. Drawing illustrating different focal areas of the display for a user positioned at the center of the display
(Systems and methods for configuring the display resolution of an electronic device based on distance and user presbyopia, US 13/666499)
Google's 'Project Moohan' smart glasses are more than just a new wearable device; they reflect Google's ambitious plan to integrate information into users' daily lives and transform the way they interact. The numerous patents reviewed above clearly demonstrate Google's broad and deep preparation for this project, from display technology, body design, various input methods, intelligent environmental perception, and multi-device ecosystem integration.
These patents prove that Google has a long-term vision to expand users’ visual, auditory, and operational experiences beyond simple technology development. Smart glasses will be the core devices of the future that connect our lives, provide information, and allow us to interact with the world in new ways. Once again, the most reliable way to understand a company’s technology development roadmap and predict the future is to analyze the patents they file. Patent data is not just a legal document; it is a blueprint of a company’s technological ambitions and future strategies.
By Gihyeon Park
Patent Attorney, BLT Patent & law Firm www.en.blt.kr
#GoogleSmartGlasses,#ProjectMoohan,#ARtechnology,#AugmentedReality,#WearableTech,#TechInnovation,#FutureDevices,#PatentStrategy,#ARInterface,#UserExperienceDesign,#MultideviceIntegration,#GestureControl,#OpticalTechnology,#SmartWearables,#TechTrends2025,#HumanComputerInteraction,#VisualComputing,#DigitalTransformation,#AIandAR,#NextGenDisplay