Display Light Guide Part and Blocking Layer for Reflectance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light emitting display apparatuses face issues with luminous efficiency and external light reflectance, where increasing the pixel electrode area to improve luminosity also increases external light reflectance, deteriorating visibility, and existing solutions like separate optical or polarizing films are costly and insufficient.
Innovation Solution
A display apparatus design featuring a substrate with a light emitting area, a light emitting device, a light blocking layer, and a light guide part that guides light from the emitting device to a smaller light exiting area, minimizing external light reflectance without the need for additional polarization layers or circularly polarized light conversion layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the pixel electrode area is increased to improve luminous efficiency, then luminous efficiency is improved, but external light reflectance increases which deteriorates reflection visibility
Solution Approach 1:
The pixel electrode area is segmented into two distinct regions: a light emitting area for generating light and a light exiting area for light output. This segmentation allows the light emitting area to be sufficiently large for high luminous efficiency while the light exiting area is controlled to minimize external light reflectance, thus resolving the contradiction between luminous efficiency and reflection visibility
Solution Approach 2:
Different regions of the pixel electrode are assigned different functional qualities: the light emitting area is optimized for light generation with larger area, while the light exiting area is optimized for light output with controlled area and position. This local differentiation enables each region to perform its function optimally without compromising the other, achieving both high luminous efficiency and low external light reflectance
2Object-affected harmful factors
If separate optical films or polarizing films are combined to prevent external light reflection, then external light reflectance is reduced, but manufacturing cost increases
Solution Approach 1:
The light blocking layer is merged with the pixel electrode structure to form an integrated component. The light blocking layer is disposed at the light emitting area and overlaps the light exiting area, combining the functions of light emission, light guidance, and external light blocking within a single integrated structure, thereby eliminating the need for separate optical films or polarizing films and reducing manufacturing cost
Solution Approach 2:
The light blocking layer serves multiple functions simultaneously: it blocks external light from entering the pixel electrode, guides light generated in the light emitting area to the light exiting area, and defines the boundaries of the light emitting and light exiting areas. This multi-functionality reduces the number of separate components needed, simplifying the structure and reducing manufacturing cost while effectively reducing external light reflectance
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 design enhances luminous efficiency while reducing external light reflectance, improving visibility and eliminating the need for costly additional films, thus providing a cost-effective solution.
Implementation Method 1
a light guide part disposed at the light emitting area and configured to guide light generated in the light emitting device to the at least one light exiting area
Implementation Method 2
a light blocking layer disposed at the light emitting area and overlapping the at least one light exiting area
Data Source
AI summary
A display apparatus can include a substrate having a light emitting area, a light emitting device disposed at the light emitting area on the substrate, at least one light exiting area disposed in the light emitting area, a light blocking layer disposed at the light emitting area and overlapping the at least one light exiting area, and a light guide part disposed at the light emitting area and configured to guide light generated in the light emitting device to the at least one light exiting area.