Electrochromic Grating Integrated on Display Substrate

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Solution Overview

Problem

Current naked-eye type 3D display technology using electrochromic gratings is hindered by complex packaging processes and thickness issues, leading to alignment inaccuracies with display panel sub-pixels.

Innovation Solution

An electrochromic grating comprising a first transparent electrode layer, an electrochromic layer, a solid electrolyte layer with high ion conductivity, and a second transparent electrode layer is integrated directly onto the display panel's substrate, eliminating the need for external glass substrates and enabling precise alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If electrochromic grating is formed as an external component with glass substrates, then the grating can be assembled and packaged, but the packaging process becomes complex and the device thickness increases

Engineering Contradiction:

Improvepackaging processVSAvoidpackaging process

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent merges the electrochromic grating structure directly with the display panel substrate by integrating the electrochromic layer, transparent electrode layers, and solid electrolyte layer onto the same substrate. This eliminates the need for separate glass substrates and complex packaging processes, directly reducing device complexity while maintaining manufacturability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts and eliminates the glass substrate components from the traditional electrochromic grating structure. By removing the glass substrates and assembling them into a integrated layer structure on the display panel substrate, the complex packaging process is eliminated while achieving the same optical modulation function

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of manufacture

If electrochromic grating is formed as an external component, then the grating can be assembled separately, but alignment accuracy with sub-pixels deteriorates

Engineering Contradiction:

Improveassembly processVSAvoidalignment accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent merges the electrochromic grating fabrication process with the display panel manufacturing process. By forming all layers (electrochromic layer, transparent electrode layers, solid electrolyte layer) directly on the display panel substrate in sequence, the alignment accuracy with sub-pixels is ensured through precise control during the integrated manufacturing process, eliminating alignment errors from separate assembly

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If liquid electrochromic material is used, then the electrochromic layer can be formed, but glass substrates are needed for packaging, increasing device thickness

Engineering Contradiction:

Improveelectrochromic layer formationVSAvoiddevice thickness

Core Design Contradiction:

Ease of manufactureVSLength of stationary object

Solution Approach 1:

The patent changes the physical state parameter of the electrolyte from liquid to solid. By using solid electrolyte material with high ion conductivity, the need for enclosing glass substrates is eliminated, allowing the electrochromic device to be integrated directly on the display panel substrate without increasing device thickness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The solid electrolyte layer acts as a thin film structure that eliminates the need for thick glass substrate enclosures. This thin film approach maintains the electrochromic function while significantly reducing the overall device thickness by removing the glass substrate packaging structure

Inventive Principle:

Principle #30Flexible shells and thin films

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 reduces the thickness of the 3D display device and improves alignment accuracy, enhancing display performance by simplifying the packaging process and allowing for more precise integration with sub-pixels.

Implementation Method 1

a solid electrolyte layer with high ion conductivity and high transmission that is configured to supply ions to the electrochromic layer

Methodology Applied

Scientific EffectIon conductivity: Conduction (electrical)

Implementation Method 2

an electrochromic layer

Methodology Applied

Scientific EffectElectrochromism: Electrochromism

Data Source

PatentUS9823484B2Electrochromic grating and 3D display device

Publication Date: 2017.11.21 BOE TECHNOLOGY GROUP CO LTD

AI summary

The disclosure relates to a 3D display device. The 3D display device includes a display panel and an electrochromic grating that is located on a light output side of the display panel; wherein the electrochromic grating comprises: a first transparent electrode layer, an electrochromic layer, a solid electrolyte layer and a second transparent electrode layer that are overlapped on a substrate of the display panel in sequence. As the solid electrolyte layer is used replacing the process in prior art that an upper and lower glasses substrates are used to package the electrochromic grating and thus avoiding complex packaging process, the 3D display device can be thinned. Further, as the electrochromic grating is directly formed on the substrate of the display panel, alignment between the electrochromic grating and the sub-pixels in the display panel can be more simple and accurate.