Brightness Control Layer for OLED Color Deviation Reduction
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Solution Overview
Problem
Existing electronic devices with OLED displays face challenges in maintaining display quality, particularly in reducing color deviation when viewed from different angles.
Innovation Solution
The electronic device incorporates a display layer with light emitting elements and an optical layer that includes a light shielding layer with openings, color filters, and a brightness control layer. The brightness control layer, with a higher transmittance than the light shielding layer, is strategically positioned to overlap specific light emitting areas and openings, controlling brightness and reducing color deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional OLED display structure is used, then the device achieves fast response speed and low power consumption, but color deviation occurs when viewed from different angles
Solution Approach 1:
The display structure is segmented into multiple functional layers including a light emitting layer, a light shielding layer with openings, and a brightness control layer. Each layer performs a specific function to collectively solve the color deviation problem while maintaining OLED advantages.
Solution Approach 2:
The brightness control layer is positioned to overlap specifically with certain light emitting areas and openings, creating local brightness modulation. This localized control compensates for viewing angle-dependent color shifts without affecting the entire display uniformly.
2Manufacturing precision
If a brightness control layer is added to reduce color deviation, then display quality is improved, but device complexity increases
Solution Approach 1:
The brightness control layer serves multiple functions: it modulates brightness, compensates for viewing angle color shifts, and works synergistically with the light shielding layer. This multi-functionality justifies the additional layer by providing multiple benefits from a single structural addition.
Solution Approach 2:
The solution addresses the two-dimensional color deviation problem by introducing a third dimensional aspect - the vertical stacking of multiple layers with specific optical properties. The brightness control layer's position and transmittance characteristics in the vertical dimension enable color compensation without requiring complex lateral structures.
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 configuration effectively reduces color deviation when viewed from different angles, thereby enhancing the display quality of the electronic device by maintaining consistent color representation across various viewing positions.
Implementation Method 1
An OLED includes a light emitting element, and the light emitting element may generate a light by recombination of electrons and holes
Implementation Method 2
A transmittance of the brightness control layer may be greater than a transmittance of the light shielding layer and smaller than 100 percent (%)
Implementation Method 3
a plurality of color filters arranged to correspond to the plurality of openings
Data Source
AI summary
An electronic device includes: a display layer including a plurality of light emitting elements in which a plurality of light emitting areas are defined, and an optical layer disposed on the display layer. The optical layer includes: a light shielding layer in which a plurality of openings corresponding to the plurality of light emitting areas are defined, and a plurality of color filters arranged to correspond to the plurality of openings. The display layer or the optical layer further includes a brightness control layer overlapping a first light emitting area among the plurality of light emitting areas and a first opening among the plurality of openings in a plan view, and the brightness control layer includes a first edge and a second edge surrounding the first edge, the first edge overlaps the first light emitting area, and the second edge overlaps the light shielding layer in the plan view.