Alternating Light Shielding Members for Privacy Displays
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Solution Overview
Problem
Existing display apparatuses with wide viewing angles can compromise privacy and safety, as they allow unauthorized individuals to view sensitive information or cause glare that affects drivers, necessitating a solution to limit the viewing angle effectively.
Innovation Solution
A viewing angle limiting apparatus comprising a first optical member with lower light shielding members and a second optical member with upper light shielding members, where the members are spaced apart and alternate to control the emission of image light, thereby limiting the viewing angle while facilitating easy manufacturing and reducing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus has a wide viewing angle, then users can view images in various angle directions, but it compromises privacy and safety by allowing unauthorized viewing and causing glare
Solution Approach 1:
The light shielding member is divided into multiple protrusions arranged in arrays, where each protrusion independently shields light from specific angles. This segmentation allows selective blocking of unwanted viewing angles while maintaining visibility from authorized directions, thus limiting the viewing angle to protect privacy and safety without completely blocking the display
Solution Approach 2:
The protrusions are strategically positioned and shaped to provide different shielding characteristics at different locations on the display surface. This local differentiation enables the display to maintain wide viewing angles for authorized users while simultaneously blocking unauthorized viewing angles, resolving the contradiction between viewing angle and privacy protection
2Object-affected harmful factors
If light shielding members are closely spaced to effectively limit viewing angle, then privacy and safety are enhanced, but manufacturing difficulty and defect rates increase
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the light shielding member and the display surface. This adhesive layer accommodates the closely spaced arrangement of protrusions by providing a compliant bonding interface, making it easier to manufacture high-density shielding structures without excessive difficulty or defect rates
Solution Approach 2:
The light shielding structure transitions from a two-dimensional plane to a three-dimensional array of protrusions. This dimensional change allows the shielding function to be achieved through vertical height variations rather than solely through horizontal spacing, enabling effective viewing angle limitation while maintaining manufacturability through simpler fabrication 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 apparatus effectively restricts the viewing angle of display apparatuses, enhancing privacy and safety by controlling the emission of image light, while also simplifying the manufacturing process and reducing defects in light shielding members.
Implementation Method 1
a first optical member having a plurality of lower light shielding members, and a second optical member having a plurality of upper light shielding members
Data Source
AI summary
A viewing angle limiting apparatus and a display apparatus are provided. The apparatus comprises a first optical member having a plurality of lower light shielding members, and a second optical member having a plurality of upper light shielding members and facing the first optical member. Each of the plurality of upper light shielding members may be spaced apart from each of the plurality of lower light shielding members in a thickness direction of the first optical member and disposed to be alternate with each of the plurality of lower shielding members. Therefore, since a length of each of the lower light shielding members and the upper light shielding members may be formed to be short, the light shielding members may be manufactured more easily than the case that one light shielding member is provided longitudinally up and down, and a defect rate may be lowered, whereby productivity may be enhanced.