Reflective Display Substrate Light Management

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional liquid crystal display devices suffer from light loss due to absorption by the liquid crystal layer and polarizers, leading to reduced illuminance and energy efficiency.

Innovation Solution

A display substrate with a base substrate featuring a color generating layer, a first reflective layer, and a second reflective layer with a light transmissive area and a light reflective area, where the first reflective layer reflects incident light through the light transmissive area to the light reflective area, allowing it to pass through the color generating layer for image display, eliminating the need for a liquid crystal layer and polarizers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If liquid crystal layer and polarizers are used for color display, then color display function is achieved, but light absorption increases leading to reduced illuminance and energy efficiency

Engineering Contradiction:

ImproveilluminanceVSAvoidenergy efficiency

Core Design Contradiction:

Illumination intensityVSLoss of energy

Solution Approach 1:

The patent removes the liquid crystal layer and polarizers from the display structure, extracting the harmful light-absorbing components while retaining the color display function through a simplified structure consisting of a base substrate with color filters and a reflective layer

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful light absorption by liquid crystal and polarizers into a beneficial reflective structure where the reflective layer redirects light through the color filters multiple times, enhancing color saturation while improving light utilization efficiency

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Illumination intensity

If liquid crystal layer and polarizers are used for image display, then image display capability is achieved, but light transmittance decreases due to absorption

Engineering Contradiction:

ImprovebrightnessVSAvoidstructure complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent extracts and removes the complex liquid crystal and polarizer assemblies, replacing them with a simple reflective layer and color filter structure that achieves image display through direct light reflection and color filtering

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using transmission-based liquid crystal modulation, the patent inverts the approach by using a reflective structure where light is reflected back through the color filters, achieving image display without the need for liquid crystal layers

Inventive Principle:

Principle #13The other way round (Inversion)

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 minimizes light absorption, enhancing illuminance and energy efficiency by reflecting light through the color generating layer, thus improving the display's brightness and reducing energy loss.

Implementation Method 1

The first reflective layer is configured to reflect an incident light transmitted through the light transmissive area to the light reflective area

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

the light reflective area and the color generating layer are configured to direct the incident light reflected by the first reflective layer in a direction so that it may pass through the color generating layer

Methodology Applied

Scientific EffectLight transmission: Refraction

Data Source

PatentUS9784904B2Display substrate, display apparatus having the same, and fabricating method thereof

Publication Date: 2017.10.10 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present application discloses a display substrate including a base substrate; and a plurality of pixels on the base substrate. Each of the plurality of pixels in the display substrate includes a color generating layer on the base substrate; a first reflective layer surrounding at least one side of the color generating layer in plan view of the base substrate; and a second reflective layer having a light transmissive area and a light reflective area, the light transmissive area spaced apart from the first reflective layer in a direction perpendicular to the base substrate, the light reflective area configured to be spaced apart from the color generating layer in the direction perpendicular to the base substrate by an adjustable distance relative to the color generating layer. The first reflective layer is configured to reflect an incident light transmitted through the light transmissive area to the light reflective area, the light reflective area and the color generating layer are configured to direct the incident light reflected by the first reflective layer in a direction so that it may pass through the color generating layer.