Holographic Display Panel Blocking Member for Crosstalk Reduction
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Solution Overview
Problem
As display resolution increases in holographic display panels, Fraunhofer diffraction between sub-pixels and the phase plate leads to beam crosstalk, affecting the depth of field and position of stereoscopic images, reducing the display effect.
Innovation Solution
A holographic display panel is designed with a blocking member positioned between sub-pixels and the phase plate, where the width of the blocking member is optimized to block the edge portion of diffracted light beams, eliminating crosstalk and ensuring accurate depth of field, and the phase plate is configured to adjust light beam angles or include sub-phase plates for each sub-pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display resolution is increased, then image quality is improved, but beam crosstalk increases due to Fraunhofer diffraction
Solution Approach 1:
A blocking member is introduced as an intermediary component between the sub-pixels and the phase plate. This blocking member specifically blocks the edge portions of diffracted light beams that cause Fraunhofer diffraction and beam crosstalk, while allowing the central useful light to pass through to the phase plate, thereby resolving the contradiction between high resolution and beam crosstalk
Solution Approach 2:
The harmful edge portions of diffracted light beams are extracted and blocked by the blocking member. By removing only the problematic edge components that cause crosstalk while preserving the central useful light, the system achieves reduced beam crosstalk while maintaining display resolution
2Object-generated harmful factors
If blocking member width is increased, then beam crosstalk is reduced, but light transmission is blocked
Solution Approach 1:
The blocking member is designed with specific local characteristics: it blocks only the edge portions of light beams where crosstalk occurs, while leaving the central useful light transmission path unobstructed. This localized blocking approach reduces beam crosstalk without significantly impeding overall light transmission to the phase plate
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 solution effectively reduces beam crosstalk, provides clear sub-pixel edges, eliminates color and grayscale crosstalk, and achieves accurate depth of field, enhancing the visual effect of holographic displays.
Implementation Method 1
Fraunhofer diffraction between sub-pixels and the phase plate leads to beam crosstalk
Implementation Method 2
an orthogonal projection of the blocking member on a plane where the plurality of sub-pixels are located is arranged between adjacent sub-pixels for blocking an edge portion of a light beam diffracted by the sub-pixel
Implementation Method 3
the phase plate is configured to adjust an angle of a light beam from the plurality of sub-pixels
Implementation Method 4
In the reconstruction of the holographic information, a reference beam similar to the reference beam for recording is irradiated to the recording medium so that the optical interference pattern in the recording medium diffracts the reference beam to reconstruct the object beam
Data Source
AI summary
A holographic display panel, a holographic display device, and a holographic display method are disclosed. The holographic display panel includes a plurality of sub-pixels arranged in an array and a phase plate disposed on a light exit side of the plurality of sub-pixels; and a blocking member disposed between the plurality of sub-pixels and the phase plate; an orthogonal projection of the blocking member on a plane where the plurality of sub-pixels are located is arranged between adjacent sub-pixels for blocking an edge portion of a light beam diffracted by the sub-pixel.