Movable Hinge Alignment in Rollable Displays With Input Devices

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Solution Overview

Problem

Rollable display devices face misalignment issues between the center position of the display and input devices when the size or aspect ratio is altered, making it difficult to utilize the input device effectively.

Innovation Solution

A mechanism is introduced to align the center position of the rollable display device with the center position of the input device by adjusting the hinge position in response to changes in the display's size or aspect ratio, using sensors and motors to ensure alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the size or aspect ratio of the rollable display device is altered, then the display can provide different viewing experiences and functionalities, but the center position of the display becomes misaligned with the center position of the input device

Engineering Contradiction:

Improvedisplay size and aspect ratioVSAvoidalignment between display and input device

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The hinge device is made movable along the edge of the input device, allowing its position to be dynamically adjusted. This enables the system to adapt to different display sizes and aspect ratios while maintaining proper alignment between the display center and input device center, resolving the contradiction between adaptability and ease of operation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses sensors to detect the position of the rollable display device and the position of the hinge device, and a processor to calculate the optimal hinge position based on detected display parameters. This feedback mechanism ensures automatic alignment maintenance regardless of display size or aspect ratio changes

Inventive Principle:

Principle #23Feedback

2Ease of operation

If a mechanism with sensors and motors is added to maintain alignment, then the alignment between display and input device is maintained, but the device complexity increases

Engineering Contradiction:

Improvealignment between display and input deviceVSAvoidalignment mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system replaces complex mechanical alignment mechanisms with a combination of sensors, a processor, and a movable hinge. The sensor-based detection and processor-based calculation substitute for intricate mechanical linkages, reducing overall device complexity while achieving precise alignment

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The movable hinge device serves multiple functions: it acts as the connection point between display and input device, provides alignment adjustment capability, and serves as a mounting structure for sensors. This multi-functionality reduces the need for separate components, thereby reducing device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12578764B2Rollable display devices with movable hinge

Publication Date: 2026.03.17 HEWLETT PACKARD DEVELOPMENT COMPANY LP

AI summary

In some examples, the disclosure describes a device that includes a rollable display device that is extendable in a first direction, a hinge coupled to the rollable display device to move in a second direction in response to the rollable display device being extended in the first direction, and an input device coupled to the rollable display device through the hinge.