Light Deflector With Resistor Electrodes for Holographic Displays
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Solution Overview
Problem
Existing light deflectors in holographic display systems face challenges in reducing E-field distortion and increasing deflection angles due to limited drive circuit channels, which affects noise reduction and diffraction efficiency.
Innovation Solution
A light deflector design incorporating a resistor layer between electrode elements allows for voltage drop and reduced E-field distortion by using fewer drive circuit channels, with effective and dummy electrodes receiving voltages through a drive circuit and resistor, respectively, to manage voltage distribution efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage is applied through multiple drive circuit channels to reduce E-field distortion, then E-field distortion is reduced, but device complexity increases
Solution Approach 1:
The electrode structure is segmented into effective electrodes and dummy electrodes. Effective electrodes receive voltage directly from drive circuit channels, while dummy electrodes are positioned between them to create voltage drops through their resistance, generating additional E-field components that reduce overall E-field distortion without requiring additional drive circuit channels.
Solution Approach 2:
Dummy electrodes act as intermediary elements between effective electrodes. These dummy electrodes have specific resistance values that create controlled voltage drops, serving as mediators that generate compensating E-field components to reduce distortion without requiring direct control from the drive circuit.
2Measurement precision
If more drive circuit channels are used to control voltage distribution, then deflection angle control is improved, but device complexity increases
Solution Approach 1:
The electrode array is segmented into effective electrodes controlled by drive circuit channels and dummy electrodes that automatically generate voltage drops through their resistance. This segmentation allows precise deflection angle control through the effective electrodes while the dummy electrodes provide automatic compensation without requiring additional control channels.
Solution Approach 2:
Dummy electrodes provide self-service by automatically generating the required voltage drops through their inherent resistance when current flows between effective electrodes. This self-service mechanism provides precise voltage distribution and deflection control without requiring additional active control elements or drive circuit channels.
3Reliability
If voltage drop resistors are added between electrode elements, then E-field distortion is reduced, but manufacturing complexity increases
Solution Approach 1:
The dummy electrodes are merged with the existing electrode structure and fabricated using the same thin-film deposition processes. The resistance of dummy electrodes is controlled by their geometric dimensions (width, length, spacing) rather than requiring separate resistor materials or additional fabrication steps, thereby reducing manufacturing complexity while achieving E-field distortion reduction.
Solution Approach 2:
Instead of adding separate voltage drop resistors with specific resistance values, the invention changes the parameters of the electrode structure itself - specifically the dimensions and spacing of dummy electrodes - to achieve the desired resistance and voltage drop characteristics. This parameter change approach uses existing fabrication processes and materials, simplifying manufacturing.
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 design effectively reduces E-field distortion and increases deflection angles while minimizing noise, enabling improved light deflection and diffraction efficiency in holographic display systems.
Implementation Method 1
A light deflector design incorporating a resistor layer between electrode elements allows for voltage drop and reduced E-field distortion
Implementation Method 2
a liquid crystal layer between the first electrode layer and the second electrode layer
Data Source
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AI summary
Provided are a light deflector and a light output device including the light deflector, the light deflector including a first electrode layer and a second electrode layer that are spaced apart from each other and facing each other, and a deflection layer configured to deflect incident light thereon based on a voltage applied to the first electrode layer and the second electrode layer, wherein the first electrode layer includes a plurality of electrode elements that are spaced apart from each other, and a resistor that is in contact with at least part of the plurality of electrode elements and in which a voltage drop is generated..