Light Route Control Structure With Refractive-Index Matched Partitions
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Solution Overview
Problem
Existing light-shielding films face issues with inefficient control of light transmission due to differences in refractive index between partition wall parts and receiving parts, leading to unwanted light transmission in specific angle ranges.
Innovation Solution
A light route control member with controlled refractive index ratios between partition wall parts and receiving parts, using a structure that includes a first substrate, electrodes, and a light conversion part with partition wall and receiving parts, where the refractive index ratio is 1:0.95 to 1:1.05, minimizing light reflection, scattering, and refraction at interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If partition wall parts are disposed between receiving parts to divide the receiving part into multiple regions, then the light shielding structure is improved and light can be blocked more effectively, but light is refracted, reflected, and scattered at the interface between the receiving part and partition wall part due to refractive index difference, causing light transmission in specific angle ranges without being shielded
Solution Approach 1:
The patent adjusts the refractive index of the partition wall part to be substantially equal to that of the receiving part (refractive index ratio of 0.9-1.1). This parameter change eliminates refraction, reflection, and scattering at the interface between the partition wall part and receiving part, thereby preventing light from being transmitted in specific angle ranges without shielding while maintaining the light-blocking effectiveness of the partitioned structure.
2Ease of operation
If a light-shielding film is used to control viewing angle according to incident angle of light, then clear image quality can be expressed at needed viewing angle, but the structure becomes more complex and additional layers are required
Solution Approach 1:
The patent combines the light-shielding function and the viewing angle control function into a single integrated structure. The partition wall parts serve dual purposes: they block light in specific directions while also controlling the viewing angle through their geometric arrangement and refractive index matching. This eliminates the need for separate light-shielding films and achieves viewing angle control inherently through the structure itself.
3Adaptability or versatility
If switchable light-shielding film is implemented by adding electrically moving particles to change between light transmitting and light blocking states, then the light shielding can be switched according to environment, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent achieves switchable light shielding by creating regions with different light transmission properties through the partitioned structure. The partition wall parts and receiving parts form distinct zones where light interaction differs - the partition wall parts block light while the receiving parts allow light transmission. This local differentiation of optical properties provides environment-adaptive shielding without requiring complex electrically moving particles, simplifying manufacturing while maintaining versatility.
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 light shielding properties by controlling light transmission within desired ranges, improving lateral shielding effects and reducing light loss through total reflection, thereby enhancing front luminance and visibility.
Implementation Method 1
the light transmittance of the receiving part is changed according to application of a voltage, and the receiving part includes a dispersion and light conversion particles dispersed in the dispersion
Implementation Method 2
light may be refracted, reflected, and scattered at the interface between the receiving part and the partition wall part without being incident into the pattern part
Implementation Method 3
light may be refracted, reflected, and scattered at the interface between the receiving part and the partition wall part without being incident into the pattern part
Data Source
AI summary
An optical path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the upper part of the first substrate; a second substrate disposed on the first substrate; a second electrode disposed on the lower part of the second substrate; and an optical conversion unit disposed between the first electrode and the second electrode. The optical conversion unit includes partition wall portions and receiving portions that are alternately disposed. The receiving portions change optical transmittance in response to the application of voltage, and include a dispersion and optical conversion particles dispersed in the dispersion. The refractive index ratio of the partition wall portions and the receiving portions is 1:0.95 to 1:1.05.