Viewing angle control element and display module
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Solution Overview
Problem
Existing anti-peeping screens in display modules reduce light output efficiency, necessitating a solution that enhances light output efficiency while maintaining privacy and safety considerations.
Innovation Solution
A viewing angle control element comprising a first substrate with high reflectivity spacer units and a second substrate with lower reflectivity spacer units, disposed between a backlight and a display panel, to enhance light recycling and control viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If anti-peeping screens are used to control viewing angle, then privacy protection is improved, but light output efficiency deteriorates
Solution Approach 1:
The viewing angle control element is divided into multiple spacer units (first spacer units and second spacer units) with different reflectivities. This segmentation allows different regions to perform different functions: some regions reflect light to control viewing angle while others transmit light to maintain brightness, thus resolving the contradiction between privacy protection and light output efficiency.
Solution Approach 2:
Different spacer units are assigned different reflectivity properties locally within the same viewing angle control element. The first spacer units have higher reflectivity for viewing angle control, while the second spacer units have lower reflectivity for light transmission. This local differentiation enables simultaneous achievement of privacy protection and maintained light output efficiency.
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
Improves light output efficiency and luminance by reflecting light back into the display module, allowing for both normal and anti-peeping modes with reduced moiré patterns and color deviations.
Implementation Method 1
A reflectivity of the first spacer units is greater than a reflectivity of the second spacer units
Data Source
AI summary
A viewing angle control element and a display module are provided. The viewing angle control element includes a first substrate, a plurality of first spacer units, a plurality of second spacer units, and a second substrate. The plurality of first spacer units are disposed on the first substrate. The plurality of second spacer units are respectively disposed on the plurality of first spacer units. The second substrate is disposed on the plurality of second spacer units. A reflectivity of the plurality of first spacer units is greater than a reflectivity of the plurality of second spacer units.