Switching Panel Overlap for Display Contrast and Thickness

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Solution Overview

Problem

Display devices with a switching panel suffer from alignment accuracy issues and increased thickness, leading to distortion of images at non-center viewing angles due to displacement of dimming signals, which affects the visual effect at large viewing angles.

Innovation Solution

A display device design where a switching panel overlaps a color display panel, with a light shielding layer and pixel units arranged to maintain resolution and improve visual effect by scattering light uniformly, using a diffusion layer with scattering particles to disperse light and reduce edge distortion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a switching panel is added to increase contrast at large viewing angles, then the visual effect is improved, but the overall thickness increases and alignment accuracy deteriorates

Engineering Contradiction:

ImprovecontrastVSAvoidoverall thickness

Core Design Contradiction:

Illumination intensityVSLength of stationary object

Solution Approach 1:

The patent merges the switching panel and color display panel into a single integrated structure where the switching panel is positioned between the color display panel and backlight module. This integration allows the switching panel's third electrode to overlap with the color display panel's first light shielding layer, creating a unified optical path that improves contrast without proportionally increasing overall thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent positions the switching panel in the optical path dimension (between the backlight module and color display panel) rather than adding it as a separate lateral component. The third electrode of the switching panel is arranged to overlap the first light shielding layer in the vertical stacking direction, utilizing the optical dimension to achieve contrast enhancement while controlling thickness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Illumination intensity

If a switching panel is added to increase contrast, then the visual effect is improved, but alignment accuracy deteriorates causing image distortion

Engineering Contradiction:

ImprovecontrastVSAvoidalignment accuracy

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by positioning the third electrode of the switching panel specifically to overlap the first light shielding layer of the color display panel in the vertical direction. This localized overlapping arrangement ensures that the dimming function is precisely applied only where needed (at the edges and corners) without requiring high-precision alignment across the entire panel, thereby reducing image distortion while maintaining contrast enhancement.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The first light shielding layer serves as an intermediary element between the switching panel's third electrode and the display image. By positioning the third electrode to overlap this light shielding layer, the patent creates a buffer zone that tolerates alignment variations, as the light shielding layer absorbs minor misalignments and prevents them from causing image distortion.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Illumination intensity

If the overall thickness increases due to adding a switching panel, then contrast is improved, but image distortion increases at edge regions

Engineering Contradiction:

ImprovecontrastVSAvoidimage distortion

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

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 enhances the visual effect at large viewing angles by maintaining resolution and reducing edge distortion, improving the overall display quality by ensuring accurate alignment and uniform light distribution.

Implementation Method 1

using a diffusion layer with scattering particles to disperse light and reduce edge distortion

Methodology Applied

Scientific EffectLight scattering: Scattering

Data Source

PatentUS10809582B2Display device

Publication Date: 2020.10.20 AU OPTRONICS CORP

AI summary

A display device including a color display panel and a switching panel which overlaps the color display panel in a first direction is provided. The color display panel includes a first array substrate, a first opposite substrate, and a first light shielding layer. The first opposite substrate overlaps the first array substrate in the first direction, wherein the first array substrate has a first display region and a first peripheral region located on at least one side of the first display region. The first light shielding layer overlaps the first peripheral region in the first direction. The switching panel comprises a second array substrate and a second opposite substrate. The second opposite substrate overlaps the second array substrate in the first direction, wherein the second array substrate comprises a second display region. The second display region overlaps the first display region and the first peripheral region in the first direction.