How the iPhone's Slide-to-Unlock Gesture Worked
Apple's 2010 patent on unlocking a device by dragging a specific graphical image along a predefined path on a touchscreen, a gesture iconic with early iPhones.
Original patent title: “Unlocking a device by performing gestures on an unlock image”
What this patent covers
The actual claim
This patent describes a method for unlocking an electronic device with a touchscreen. When the device is locked, it shows an 'unlock image' on the screen. To unlock, a user must touch the screen and move this unlock image along a specific, visible path, like a channel (Claim 3). If the detected touch corresponds to this predefined gesture, the device transitions from a 'user-interface lock state' to a 'user-interface unlock state' (Claim 1). If the gesture is incorrect, the device stays locked and prevents unintended actions (Claim 2). For example, a user might slide a right-pointing arrow icon horizontally across the screen to reveal the home screen.
What this patent does NOT cover
The boundaries
- Does not cover unlock gestures that do not involve moving a specific unlock image (e.g., tapping a button, drawing a pattern without an image moving).
- Does not cover unlock gestures where the image is not moved along a predefined *displayed* path (e.g., free-form drawing or a path not visually shown).
- Does not cover unlocking methods that do not require continuous contact with the display for the gesture (Claim 4).
- Does not cover unlocking via biometrics like fingerprint or face recognition.
- Does not cover unlocking by simply tapping an image without moving it across the display.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The novelty lay in combining a graphical, interactive 'unlock image' with a 'predefined displayed path' that the user had to follow with continuous contact to unlock the device. This made the unlock process both visually intuitive and resistant to accidental activation.
Animated diagram — the unlock image moves along the predefined horizontal path described in Claim 1. Tap to replay.
Where you've seen this
Real-world examples
Original iPhone lock screen
Early versions of Apple iOS devices (iPhones, iPod Touches, iPads)
Some early Android phone lock screens that mimicked the gesture
Why it matters
The bigger picture
This patent describes the 'slide-to-unlock' gesture that became a hallmark of the original iPhone and subsequent iOS devices. It provided a simple, intuitive, and visually clear way for users to access their phones while preventing accidental touches from triggering actions. This mechanism was widely adopted and influenced user interface design across the mobile industry.
Filed
December 23, 2005
Granted
February 2, 2010
Market context
Who's building on this
Companies in this space
Apple Inc. initially built on this technology, integrating it into its iOS operating system for many years. While the exact 'slide-to-unlock' gesture has evolved or been replaced by other methods like Face ID or Touch ID, the underlying principles of secure, gesture-based unlocking continue to influence user interface design across the smartphone industry.
Market impact
This patent, and the 'slide-to-unlock' feature it enabled, set a new standard for smartphone lock screens. It helped define the user experience of early touchscreen devices, making them accessible and preventing 'pocket dials.' Its widespread adoption by Apple and subsequent influence on competitors helped establish a common interaction paradigm for mobile devices, although it also led to significant patent litigation in the mobile industry.
Claim 1 — Plain English
What this patent covers
This patent describes a method for unlocking an electronic device with a touchscreen. When the device is locked, it shows an 'unlock image' on the screen. To unlock, a user must touch the screen and move this unlock image along a specific, visible path, like a channel (Claim 3). If the detected touch corresponds to this predefined gesture, the device transitions from a 'user-interface lock state' to a 'user-interface unlock state' (Claim 1). If the gesture is incorrect, the device stays locked and prevents unintended actions (Claim 2). For example, a user might slide a right-pointing arrow icon horizontally across the screen to reveal the home screen.
The clever bit
The novelty lay in combining a graphical, interactive 'unlock image' with a 'predefined displayed path' that the user had to follow with continuous contact to unlock the device. This made the unlock process both visually intuitive and resistant to accidental activation.
What it does not cover
- Does not cover unlock gestures that do not involve moving a specific unlock image (e.g., tapping a button, drawing a pattern without an image moving).
- Does not cover unlock gestures where the image is not moved along a predefined *displayed* path (e.g., free-form drawing or a path not visually shown).
- Does not cover unlocking methods that do not require continuous contact with the display for the gesture (Claim 4).
- Does not cover unlocking via biometrics like fingerprint or face recognition.
- Does not cover unlocking by simply tapping an image without moving it across the display.
Patent Journey
From filing to expiry
Patent Filed
2005
Patent Granted
2010 · 4yr after filing
Highly Cited
1,267 patents cite this
Patent Expired
2025
PatentBrief Score
Impact Score
High impact
Citation count
40/40
Highly cited
Claim breadth
20/20
Very broad protection
Recency
5/20
Granted 10–20 years ago
Assignee scale
20/20
Major technology company
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
The original legal language
Original claims
39 claims as filed with the patent office.
Citations
Patent lineage
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