Zone Plate Light Ray Control for Display Sub-Pixel Direction
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Solution Overview
Problem
Display panels face the challenge of divergent light rays emerging from the light exit side, making it difficult to control the direction of light emission.
Innovation Solution
A display device comprising a light ray control component with zone plates on the light emergent side, where each sub-pixel region corresponds to a zone plate, which is made of transparent material with alternating ring groups of different thicknesses to control the direction of light rays, and optionally includes a transparent substrate attached to the display panel using optical clear adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If no light control component is added, then the display structure is simple, but the light rays are divergent and direction control is difficult
Solution Approach 1:
The light ray control component is divided into multiple zone plates, with each zone plate corresponding to a specific sub-pixel region. This segmentation allows independent control of light direction for different color sub-pixels (red, green, blue), enabling precise directional control while maintaining a relatively simple overall structure.
Solution Approach 2:
Zone plates are introduced as intermediary optical elements between the display panel and the viewer. These zone plates act as mediators that manipulate light rays without requiring complex mechanical or electronic control systems, achieving direction control through optical path modification.
2Ease of operation
If zone plates with alternating ring groups are used, then light direction control is improved, but manufacturing precision requirements increase
Solution Approach 1:
The zone plates utilize alternating ring groups with different thicknesses (first thickness and second thickness) to control light phase. By adjusting the thickness parameter of alternating rings, the patent achieves effective light direction control while providing clear manufacturing specifications for the thickness difference requirement.
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 ray control component effectively controls the direction of light rays emitted from the display panel, addressing the issue of divergent light and improving light control.
Implementation Method 1
thicknesses of the zone plates at the rings in the first ring group are all a first thickness, thicknesses of the zone plates at the rings in the second ring group are all a second thickness, the absolute value of a thickness difference between the thickness of the zone plate at the rings in the first ring group and the thickness of the zone plate at the rings in the second ring group meets nd=λ/2, n is a refractive index of a material of the zone plate
Data Source
AI summary
The present disclosure provides a display device and a manufacturing method thereof, in the field of display technology. The display device can comprise: a display panel and a light ray control component disposed on a light emergent side of the display panel, wherein the light ray control component comprises a plurality of zone plates; each sub-pixel region on the display panel corresponds to one of the zone plates, and the zone plate corresponding to any sub-pixel region is used to control a direction of light rays emitted from the any sub-pixel region. In the present disclosure, the light ray control component comprising a plurality of zone plates is disposed on the light emergent side of the display panel, and each sub-pixel region of the display panel corresponds to one zone plate. Therefore, the problem in the related art that the light rays emergent from the light emergent side of the display panel are divergent light, and a direction of the light rays is hard to control is solved. The effect of controlling the direction of the light rays emergent from the light emergent side of the display panel by the light ray control component is achieved.