Light Control Member Barrier Walls Restrict Exit Angle
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Solution Overview
Problem
Display apparatuses face issues with color mixture due to the wide exit angle of light from the backlight unit, which results in unwanted light being directed to non-intended color conversion layers, reducing light efficiency and image quality.
Innovation Solution
A light control member with first barrier wall members is introduced between the display panel and the backlight unit, restricting the exit angle of light to a predetermined angle by arranging them in a specific direction and spacing, and incorporating carbon black for light absorption, thereby preventing color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filters are used in the display panel, then color separation is achieved, but light efficiency is reduced to one-third of the original amount
Solution Approach 1:
A light control member with barrier wall members is introduced as an intermediary component between the backlight unit and the display panel. This mediator restricts light exit angles and directs light precisely to corresponding color conversion layers, preventing color mixture while maintaining high light efficiency without requiring traditional color filters that block two-thirds of the light
Solution Approach 2:
The invention changes the optical parameters by controlling the exit angle of light from the backlight unit. By using barrier wall members to restrict light to specific angular ranges, the system achieves precise light direction without the need for absorbing color filters, thereby maintaining high light efficiency while achieving color separation
2Area of stationary object
If the exit angle of light from the backlight unit is wide, then light coverage is improved, but color mixture occurs between adjacent color conversion layers
Solution Approach 1:
The light control member is segmented into multiple barrier wall members that are arranged in a matrix pattern. Each barrier wall member creates a distinct light path to a specific color conversion layer, segmenting the overall light output into controlled directional beams that cover the display area while preventing lateral light spread that causes color mixture
Solution Approach 2:
The barrier wall members provide localized light control with different properties for different regions. Each barrier wall member is positioned and oriented to control light locally to its corresponding color conversion layer, creating spatially varying light direction properties that achieve both wide coverage and precise color separation
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 light control member effectively restricts the exit angle of light, preventing color mixture and enhancing light efficiency by ensuring that light is directed only to intended color conversion layers, thereby improving image quality.
Implementation Method 1
a plurality of first barrier wall members disposed between the first and second substrate members, extending in a first direction, and arranged in a second direction crossing the first direction. The first barrier wall members may restrict an exit angle of the light from the backlight unit to a predetermined angle.
Implementation Method 2
The first barrier wall members may include a carbon black which absorbs the light.
Data Source
AI summary
A display apparatus includes a display panel, a backlight unit which provides a light to the display panel, and a light control member disposed between the display panel and the backlight unit. The light control member includes a plurality of first barrier wall members extending in a first direction and arranged in a second direction crossing the first direction.