Spacer-Based Detection Device for Compact Display Integration
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Solution Overview
Problem
Existing display devices with integrated detection systems, such as fingerprint sensors, require separate components that increase the device size and complexity, necessitating a more efficient attachment method to minimize size and enhance sensing accuracy.
Innovation Solution
A detection device comprising a base, sensor layer, collimator layer, lenses, and a spacer that allows easy attachment to a display panel using an adhesive layer, with the spacer protruding to create a space for the lenses, preventing optical interference and allowing for miniaturization and improved sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate parts are used for attaching the detection device to the display panel, then the detection device can be securely mounted, but the display device size increases
Solution Approach 1:
The patent merges the attachment function into the spacer component itself. The spacer integrates both the positioning function (maintaining distance between display panel and detection device) and the attachment function (providing attachment protrusions that engage with the display panel). This eliminates the need for separate attachment parts, thereby securing reliable mounting while preventing increase in display device size.
2Volume of moving object
If the detection device is integrated with the display panel, then the device size is minimized, but additional components are required which increases complexity
Solution Approach 1:
The spacer is designed as a multi-functional component that simultaneously performs: (1) positioning the detection device at the required distance from the display panel, (2) providing attachment protrusions for secure mounting, and (3) maintaining the optical path integrity. By making the spacer universal and multi-functional, the patent minimizes the number of additional components required, thereby reducing overall device complexity while achieving compact integration.
3Reliability
If the spacer protrudes more than the lenses, then the lenses are protected from damage and moisture intrusion is prevented, but the attachment structure becomes more complex
Solution Approach 1:
The spacer is segmented into distinct functional regions: (1) the protruding portion that extends beyond the lenses to provide protection and define the optical cavity, and (2) the attachment protrusions that engage with the display panel. This segmentation allows each portion to perform its specific function optimally while maintaining overall structural simplicity. The protective protrusion and attachment features are integrated into a single piece, avoiding the need for separate protective covers or complex multi-component assemblies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a compact display device with enhanced sensing accuracy and reliability by allowing the detection device to be easily integrated with the display panel without additional components, while maintaining the optical functionality of the sensors and preventing moisture intrusion.
Implementation Method 1
an adhesive layer by which the display panel is boned to the spacer
Implementation Method 2
The spacer protrudes more than the lenses in a stacking direction of the base, the sensor layer and the collimator layer
Implementation Method 3
The plurality of lenses are placed on the collimator layer and overlap the openings, respectively
Implementation Method 4
The collimator layer is placed on the sensor layer and includes a collimator having a plurality of openings which overlap the sensors, respectively
Implementation Method 5
an optical sensor using a photoelectric conversion element is used
Data Source
AI summary
According to one embodiment, a detection device comprises a base, a sensor layer, a collimator, a plurality of lenses, and a spacer. The sensor layer is placed on the base and includes a plurality of sensors which output detection signals corresponding to incident light. The collimator layer is placed on the sensor layer and includes a collimator having a plurality of openings which overlap the sensors, respectively. The plurality of lenses are placed on the collimator layer and overlap the openings, respectively. The spacer protrudes more than the lenses in a stacking direction of the base, the sensor layer and the collimator layer.