Edge-to-Edge Display Module With Sensor Light Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing portable information handling systems with edge-to-edge displays face challenges in assembly complexity, increased cost, and reduced structural integrity due to the integration of touch sensors and backlight illumination issues, particularly when using In-cell touch technology without a cover glass.
Innovation Solution
A system and method where a display panel and backlight assemble as a contiguous unit into a housing with a sensor region defined in an inactive area, using treatments to pass light through the display panel for sensor detection, and a backlight that fits into a cavity with a flange extension region to support the display panel, reducing light leakage and eliminating the need for a clean room assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate cover glass with integrated touch sensors is used (On-cell technology), then touch detection capability is achieved, but the display assembly thickness increases and structural integrity decreases
Solution Approach 1:
The patent merges the touch sensor functionality directly into the display panel structure by using the polarizer as the outer surface with integrated touch detection capability, eliminating the need for a separate cover glass layer while maintaining both display and touch functions in a single integrated component
Solution Approach 2:
The polarizer layer serves multiple functions simultaneously: it acts as the outer display surface, provides touch detection capability, and replaces the traditional cover glass function, thereby achieving multi-functionality in a single component that reduces overall assembly thickness
2Length of moving object
If the polarizer is used as the display outer surface without cover glass, then display thickness is reduced, but structural integrity and protection capability decrease
Solution Approach 1:
The patent combines the protective cover glass function with the polarizer layer by making the polarizer the outer surface, thereby integrating multiple functions (display, protection, touch detection) into a single component that maintains structural integrity while minimizing thickness
3Strength
If display glass cover is used to protect the display, then structural integrity is improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the cover glass and display panel into a single integrated structure where the polarizer serves as both the protective outer layer and the display component, eliminating the need for separate assembly steps and reducing manufacturing complexity while maintaining protection capability
Solution Approach 2:
The polarizer layer is designed to perform multiple functions simultaneously including display output, touch sensing, and physical protection, thereby replacing multiple separate components with a single multi-functional element that simplifies assembly
4Shape
If sensors are placed under the display panel, then edge-to-edge appearance is achieved, but light access for sensor operation is blocked
Solution Approach 1:
The patent segments the polarizer layer into different functional zones: a first region that blocks light to maintain the edge-to-edge display appearance, and a second region with light-transmitting openings that allows light to reach the sensors positioned under the display panel, thereby resolving the conflict between aesthetic appearance and sensor functionality
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
This approach reduces system weight, simplifies manufacturing, and maintains structural integrity while allowing sensors to access illumination, enhancing the edge-to-edge display configuration and reducing product discrepancies.
Implementation Method 1
an index matching resin that passes illumination to sensors disposed under the display panel
Data Source
AI summary
A portable information handling system housing integrates a display having an edge-to-edge presentation of visual images at a housing portion with an inactive portion of a display panel along a perimeter of the display supported by a backplate flange extension region that extends from a backlight outer perimeter associated with an active area of the display panel to the perimeter of the housing portion. Openings formed in the backplate extension flange region provide access for sensors through the display panel inactive area with backlight illumination leakage to the opening blocked by optically dense adhesive.