Display Optical Film Segmentation for Luminance and Reflection
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Solution Overview
Problem
General display apparatuses face a trade-off between luminance and reflection characteristics due to the use of optical films that control luminance and transmittance, leading to reduced light extraction efficiency and increased power consumption.
Innovation Solution
A display apparatus with an optical film featuring a transmittance adjustment member that includes a first portion overlapping with the circuit portion and a second portion overlapping with the opening portion, enhancing light extraction efficiency and reducing diffusion reflectance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single optical film with uniform transmittance is used to control luminance, then luminance characteristic is improved, but reflection characteristic deteriorates
Solution Approach 1:
The optical film is segmented into multiple regions with different transmittance characteristics: a first region overlapping the opening portion with higher transmittance to enhance luminance, and a second region overlapping the circuit portion with lower transmittance to reduce reflection. This spatial segmentation allows simultaneous optimization of both luminance and reflection characteristics in different areas of the display panel.
Solution Approach 2:
Different regions of the optical film are assigned different transmittance properties according to their functional requirements: the opening portion region uses high transmittance material to maximize light output, while the circuit portion region uses low transmittance material to minimize reflection. This local quality differentiation resolves the trade-off between luminance and reflection control.
2Illumination intensity
If optical film is used to control luminance and transmittance, then luminance characteristic is improved, but light extraction efficiency deteriorates
Solution Approach 1:
The optical film is divided into regions with different transmittance values matched to the underlying structure: high transmittance over opening portions where light extraction is needed, and low transmittance over circuit portions where light extraction is not required. This segmentation minimizes energy loss by allowing maximum light extraction only where functional elements are present.
Solution Approach 2:
The transmittance property of the optical film is locally optimized: high transmittance in regions requiring light extraction (opening portions) and low transmittance in regions where light blocking is acceptable (circuit portions). This local optimization improves overall light extraction efficiency while maintaining luminance control.
3Object-affected harmful factors
If optical film with low transmittance is used to reduce reflection, then reflection characteristic is improved, but luminance deteriorates
Solution Approach 1:
The optical film is segmented into low transmittance regions over circuit portions for reflection control and high transmittance regions over opening portions for luminance maintenance. This segmentation ensures that reflection reduction is applied only where necessary, preserving luminance in the light-emitting areas.
Solution Approach 2:
The transmittance property is locally differentiated: low transmittance is applied specifically to circuit portions where reflection needs to be reduced, while high transmittance is maintained in opening portions where luminance must be preserved. This selective application resolves the trade-off between reflection control and luminance maintenance.
Data Source
AI summary
A display apparatus includes a display panel including a plurality of pixel areas and an optical film disposed on a light output surface of the display panel. Each of the plurality of pixel areas includes an opening portion and a circuit portion surrounding the opening portion, the optical film includes a transmittance adjustment member, and the transmittance adjustment member includes a first portion overlapping with the circuit portion and a second portion overlapping with the opening portion.