Display Device Scattering Pattern for Outdoor Visibility
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Solution Overview
Problem
Display devices used outdoors face issues with external light reflection and scattering, which reduce visibility due to the lack of effective light management technologies.
Innovation Solution
A display device design incorporating a window with pixel areas and a light shielding area, a display panel with organic light emitting diodes, and an input sensing unit featuring a scattering pattern on the insulating layer to scatter external light, reducing its intensity and preventing concentration on specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional display panel is used without light scattering structures, then the device structure remains simple, but external light reflection causes reduced visibility in outdoor conditions
Solution Approach 1:
A scattering layer is introduced as an intermediary component between the display panel and the external environment. This layer mediates the interaction between emitted light and external light by scattering the external light before it reaches the display surface, thereby improving visibility without fundamentally redesigning the display panel structure
Solution Approach 2:
The scattering layer is formed using a composite structure combining an insulating layer with scattering particles dispersed within it. This composite material approach enables the layer to maintain its insulating function while adding light scattering capability, thus improving visibility without excessive structural complexity
2Object-affected harmful factors
If a scattering layer is added to reduce external light reflection, then visibility improves, but the device structure becomes more complex
Solution Approach 1:
The scattering layer is designed to perform multiple functions simultaneously: it scatters external light to reduce reflection, maintains electrical insulation between conductive layers, and supports the overall display structure. This multi-functionality reduces the need for additional dedicated components, thereby limiting the increase in structural complexity
Solution Approach 2:
The scattering function is merged with the insulating layer rather than being implemented as a separate component. The scattering particles are incorporated into the insulating layer material, creating a unified structure that combines insulation and light scattering properties, thus reducing overall device complexity
3Object-affected harmful factors
If scattering particles are dispersed in the insulating layer, then external light is scattered effectively, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes parameters such as particle size, particle concentration, and particle material composition to achieve effective light scattering. By carefully controlling these parameters within specific ranges, the patent achieves good scattering performance while maintaining reasonable manufacturing precision requirements through standardized production processes
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 effectively reduces external light reflection and improves visibility by scattering external light, enhancing the overall performance of display devices in outdoor conditions.
Implementation Method 1
a scattering pattern on the insulating layer to scatter external light, reducing its intensity and preventing concentration on specific areas
Data Source
AI summary
A display device includes a window including pixel areas and a light shielding area, a display panel including a base substrate, a pixel definition layer disposed on the base substrate and including a plurality of openings respectively overlapping the pixel areas, and organic light emitting diodes respectively overlapping the openings and emitting a light through the openings, and an input sensing unit disposed between the window and the display panel. The input sensing unit includes a first conductive layer including a first conductive pattern disposed on the display panel, a first insulating layer covering the first conductive pattern and including a scattering pattern overlapping at least one pixel area among the pixel areas, a second conductive layer including a second conductive pattern disposed on the upper surface of the first insulating layer, and a second insulating layer covering the second conductive pattern on the first insulating layer.