Segmented Light-Emitting Areas for Privacy Viewing in Displays
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Solution Overview
Problem
Existing display devices struggle to provide users with image quality suitable to their usage environments, particularly in terms of brightness and viewing angle, which can expose personal information and compromise process reliability.
Innovation Solution
A display device with a circuit element layer and a display element layer featuring specific light emitting areas and non-light emitting areas, divided by pixel definition layers with light blocking materials, allowing for different operation modes to enhance privacy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a display device provides a wide viewing angle, then image visibility is improved, but personal information protection deteriorates
Solution Approach 1:
The display device is divided into multiple independent light emitting areas (first, second, third light emitting areas) that can be selectively activated. By segmenting the display into these regions, the device can provide a wide viewing angle when all areas are active while enabling narrow viewing angle mode by activating only specific segments, thus protecting personal information without sacrificing overall display functionality.
2Ease of manufacture
If pixel patterns are formed without division patterns, then manufacturing is simplified, but process reliability deteriorates
Solution Approach 1:
The pixel definition layer is segmented into multiple openings corresponding to different light emitting areas. Division patterns are formed within these openings to create sub-regions that can be independently controlled. This segmentation improves process reliability by enabling precise control over which pixel regions emit light in narrow viewing angle mode, while the overall manufacturing process remains integrated and efficient.
3Object-affected harmful factors
If light blocking materials are used in pixel definition layer, then reflectance is reduced, but manufacturing complexity increases
Solution Approach 1:
The pixel definition layer combines multiple functions: it defines the boundaries of light emitting areas, provides light blocking to reduce reflectance, and enables selective activation of different pixel regions. By merging these functions into a single integrated layer with light blocking materials, the device reduces reflectance and improves display quality without requiring separate components for each function, thus limiting the increase in manufacturing complexity.
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 display device provides a narrow viewing angle mode to protect personal information and improves process reliability by using division patterns that reduce reflectance and minimize process variations.
Implementation Method 1
a pixel definition layer having openings defined therethrough to overlap the first, second, third, fourth, fifth, and sixth light emitting areas, respectively; and a first division pattern disposed in at least some of the openings
Data Source
AI summary
A display device includes a circuit element layer including at least one transistor, a display element layer disposed on the circuit element layer and including a first area including first, second, and third light emitting areas and a first non-light-emitting area and a second area including fourth, fifth, and sixth areas and a second non-light-emitting area, a first light emitting element to provide a first light to each of the first light emitting area and the fourth light emitting area, a second light emitting element to provide a second light to each of the second light emitting area and the fifth emitting area, and a third light emitting element to provide a third light to each of the third light emitting area and the sixth emitting area, a pixel definition layer provided with openings, and a division pattern disposed in at least some of the openings.