Obviousness

Obviousness Analysis of US Patent 10,812,646 under 35 U.S.C. § 103

This analysis identifies combinations of prior art references that would render the claims of US patent 10,812,646 obvious to a person having ordinary skill in the art (POSA), along with motivations for such combinations. The analysis acknowledges that an earlier Inter Partes Review (IPR2025-01316) by [[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) challenging claims 1-25 of this patent was denied institution by the PTAB, primarily due to a failure to adequately demonstrate the obviousness of specific claim limitations, such as the "control icon" and "first screen" as defined, and their interaction within the described display modes. This analysis, therefore, seeks to articulate a more granular obviousness argument based on the cited prior art and common design considerations.

The core problem addressed by US10812646 is improving the operability of a portable terminal as a remote controller while ensuring security, specifically by allowing quick access to remote control functions from a sleep state without requiring a full unlock operation, but only under specific, context-dependent conditions.

Claim 1 Analysis (Representative Claim)

Claim 1 of US10812646 describes a portable terminal apparatus comprising a display, an operation input interface, a wireless communication interface (for WLAN), and a processor. The processor controls state transitions to and from a sleep state and performs a plurality of display modes:

• First display mode: A "first screen" for unlock authentication is displayed without a "control icon" when the remote control screen was not active before sleep.
• Second display mode: A "first screen" for unlock authentication is displayed without a "control icon" when the remote control screen was active before sleep, but the wireless communication interface is unable to communicate with the external device.
• Third display mode: A "control icon" and the "first screen" for unlock authentication are displayed when the remote control screen was active before sleep, and the wireless communication interface is able to communicate with the external device. In this mode, selecting the "control icon" transmits a remote control signal without the unlock operation.

Combination of Prior Art References and Motivation

A person of ordinary skill in the art (POSA) in mobile device design and wireless communication, familiar with user interface design principles for operability and security, would have been motivated to combine the following references to arrive at the invention of claim 1.

Primary References:

1. JP2006-203831 (Patent Document 3 in US10812646): This reference teaches using a portable terminal apparatus with a wireless LAN function to remotely control electronic devices, such as a television or recorder, via a local area network. This establishes the core remote control functionality via WLAN and the need for a user interface with remote control buttons/icons.
2. JP2011-048665 (Patent Document 1) and JP2013-025357 (Patent Document 2): These references describe portable terminal apparatuses equipped with lock functions to prevent unintended input operations and requiring authentication (e.g., password, pattern) to release the lock. These documents establish the concept of a lock screen (the "first screen" in Claim 1, which leads to an authentication screen for an "unlock operation") and the general requirement for security.
3. US 2013/0069888 (Samsung Electronics Co. Ltd.): This patent application discloses a wireless terminal configured to display a "locked screen" and a "control icon." It further teaches that if a "predetermined input is applied to the control icon displayed on the locked screen," the controller displays an "application screen corresponding to the control icon." This reference is crucial as it demonstrates the concept of providing direct access to specific application functions (via a "control icon") from a locked screen without requiring a full unlock operation.

Motivation for Combination:

The background art of US10812646 itself identifies a problem: current portable terminals, when used as remote controllers, go into a sleep state after a period of inactivity to save battery. Upon waking, the lock function is active, requiring authentication (e.g., password, pattern) before any remote control operation can be performed. This leads to "poor operability as a remote controller." Conversely, releasing the lock without authentication creates a "security problem." A POSA would be motivated to address this clear trade-off between operability and security.

The motivation to combine the teachings would be as follows:

• Streamlining Remote Control Access from Sleep: Knowing that portable terminals are commonly used as remote controls (JP2006-203831) and that frequent unlocking for intermittent remote control operations is cumbersome (JP2011-048665, JP2013-025357), a POSA would seek to improve the user experience.
• Leveraging Existing Lock Screen Shortcut Concepts: US 2013/0069888 provides a direct solution by teaching how to display "control icons" on a "locked screen" and enable access to associated functions with a "predetermined input" without full authentication. A POSA would readily apply this known technique to the specific function of remote control. The "locked screen" of US 2013/0069888 is analogous to the "first screen" of US10812646, which is an initial display state that can lead to authentication for full device access. The "control icon" on the locked screen in US 2013/0069888 directly corresponds to the "control icon" in Claim 1, which enables direct remote control.
• Context-Aware Display for Improved User Experience and Security: To avoid displaying irrelevant or insecure quick-access options, a POSA would be motivated to make the display of the remote control icon conditional.
  • Third Display Mode (Operability and Security Balance): If the portable terminal was already displaying a remote control screen before entering sleep (indicating recent user intent, as described in US10812646's Second Embodiment) and is currently able to communicate with the external device via WLAN (e.g., connected to a known access point within a user area, as described in US10812646's First Embodiment), it would be an obvious design choice to display the remote control "control icon" directly on the "first screen" (lock screen) to allow immediate remote control. This provides the "high operability" sought by the invention while maintaining security by restricting this quick access to a relevant and functional context.
  • First and Second Display Modes (Security and Relevance): Conversely, if the remote control screen was not active before sleep (first condition), or if it was active but the device cannot currently communicate with the external device (second condition), displaying a remote control icon would be unnecessary or non-functional. In such cases, reverting to a standard lock screen (displaying only the "first screen" for unlock authentication without the "control icon") is a logical and obvious design decision to maintain security and prevent user frustration, as universally practiced in mobile device UIs for irrelevant shortcuts. The processor controlling these conditional display modes based on current and prior states is a routine programming task for a POSA.

Conclusion on Obviousness of Claim 1

Given the explicit problem of poor remote control operability from a locked state, and the teachings of:

• JP2006-203831 for wireless LAN remote control,
• JP2011-048665 and JP2013-025357 for portable device lock screens and authentication, and
• US 2013/0069888 for displaying control icons on a locked screen to provide direct access to functions without a full unlock,

a POSA would have been motivated to combine these teachings. The motivation would be to enhance the user experience of portable terminals when functioning as remote controllers, by allowing context-aware, quick access to remote control functions directly from the lock screen, thereby solving the identified problem of poor operability while maintaining a reasonable level of security. The conditional logic defining the three display modes would be a predictable application of known context-awareness and user interface design principles to achieve the desired balance between convenience and security.

Other Claims (2-25)

The remaining claims (2-13 being dependent apparatus claims, and 14-25 being method claims corresponding to claims 1-13) would similarly be rendered obvious by the same or similar combinations of prior art. For instance:

• Claim 2: Specifies the portable terminal as a smartphone and the external device for video content. This is directly taught or strongly implied by the background of US10812646 and JP2006-203831.
• Claim 3: Details remote control operations for content selection. This is a standard function of remote controls, as described in JP2006-203831 and the background of US10812646.
• Claims 8-11: Specify encryption schemes (WEP, WPA, WPA2) for wireless communication. These are standard and known encryption protocols for WLAN communication, and their use would be obvious for securing remote control signals as taught in JP2006-203831.
• Claims 12-13: Relate to user settings for displaying the control icon. Providing user configurability for interface elements is a common design choice and within the purview of a POSA.

The method claims (14-25) describe the same functionality as the apparatus claims, merely from a procedural perspective, and thus would also be obvious for the same reasons as their corresponding apparatus claims.