Display Device With Offset Micro-Lenses for Directional Light Control
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Solution Overview
Problem
Existing display devices lack a mechanism to control the direction in which light emitted from light emitting elements is projected into external space, leading to potential misdirection and loss of image clarity.
Innovation Solution
A display device with a configuration that includes light emitting elements and on-chip micro lenses, where the offset distance between the light emitting part and lens member centers is non-zero, allowing precise control of light projection.
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 controlled and image clarity is lost
Solution Approach 1:
The patent introduces an asymmetric offset distance D0 between the lens member center and light emitting part center. This asymmetric positioning breaks the symmetric alignment (D0=0) to enable directional control of emitted light while maintaining manufacturing feasibility through precise but simple offset adjustment.
Solution Approach 2:
The patent changes the positional parameter D0 from zero (direct alignment) to a non-zero offset value. This parameter change enables control over the light emission direction and image projection characteristics without fundamentally altering the device structure or manufacturing process.
2Measurement precision
If the offset distance D0 is non-zero to control light direction, then image clarity and direction control are improved, but the alignment complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality adjustment by introducing a specific offset distance D0 only at the lens-member-light emitting part interface. This localized positional adjustment achieves global image clarity improvement without requiring complex alignment mechanisms throughout the entire device.
3Ease of manufacture
If the lens member and light emitting part are perfectly aligned (D0 = 0), then manufacturing is easier, but light is emitted in multiple directions causing color mixing
Solution Approach 1:
The patent introduces an asymmetric offset distance D0 between the lens member center and light emitting part center. This asymmetric positioning breaks the symmetric alignment (D0=0) to enable directional control of emitted light while maintaining manufacturing feasibility through precise but simple offset adjustment.
Solution Approach 2:
The patent changes the positional parameter D0 from zero (direct alignment) to a non-zero offset value. This parameter change enables control over the light emission direction and image projection characteristics without fundamentally altering the device structure or manufacturing process.
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 ensures that light emitted from the display device is accurately directed towards a specific external region, reducing color mixing and enhancing image clarity and control.
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.