Micro-Lens Offset Layout for Directional Image Projection
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Solution Overview
Problem
Existing display devices lack a mechanism to reliably control the direction in which light emitted from light emitting elements is projected into external space, leading to potential issues with image projection accuracy.
Innovation Solution
The display device incorporates a configuration with light emitting elements and on-chip micro lenses, where the distance between the light emitting part and lens member centers is offset, allowing precise control of light projection direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens member is positioned directly above the light emitting part (D0=0), then the structure is simple and alignment is easy, but the light emission direction cannot be precisely controlled towards a specific external region
Solution Approach 1:
The patent introduces an asymmetric offset D0 between the lens member center and light emitting part center, breaking the symmetric alignment (D0=0) to achieve directional light control. This asymmetric positioning allows the display device to project images towards a specific external region by strategically placing the lens member at a predetermined offset distance from the light emitting part.
2Manufacturing precision
If the offset D0 is non-zero for all light emitting elements, then image projection direction is controlled, but color mixing between adjacent pixels increases
Solution Approach 1:
The patent applies different offset D0 configurations to different light emitting elements based on their local positions. Elements in regions where color mixing is problematic maintain D0=0, while elements in regions requiring directional projection use non-zero D0. This localized differentiation resolves the contradiction by applying offset strategically rather than uniformly across all pixels.
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 configuration enables accurate projection of images towards a specific external region, reducing color mixing and enhancing image clarity and directionality.
Implementation Method 1
a lens member (an on chip micro lens) through which light emitted from the light emitting part passes
Data Source
AI summary
A display device has a display panel provided with a plurality of light emitting elements 10 including a light emitting part 30, and a lens member 50 through which light emitted from the light emitting part 30 passes, in which when a distance (an offset amount) between a normal LN passing through a center of the light emitting part 30 and a normal LN′ passing through a center of the lens member 50 is defined as D0, a value of the distance (offset amount) D0 is not 0 in at least some of the light emitting elements 10 provided in the display panel.