Array Substrate Reflective Transmissive Regions

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Solution Overview

Problem

Existing transflective display screens face challenges in achieving high reflectivity, transmittance, and contrast, particularly in varying light environments, which limits their application range.

Innovation Solution

The proposed solution involves an array substrate with a display region comprising reflective and transmissive regions, where the reflective region includes a driving signal outputting layer, segment gap layer, passivation layer, and reflective layer, and the transmissive region includes a first electrode layer with a passivation layer extending between the first electrode layer and the display substrate base.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a transflective display screen is used to improve display quality in both indoor and outdoor environments, then adaptability to different light environments is improved, but achieving high reflectivity, transmittance, and contrast simultaneously becomes difficult

Engineering Contradiction:

Improveadaptability to different light environmentsVSAvoiddisplay quality (reflectivity, transmittance, contrast)

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The display screen is divided into two distinct regions: a reflective region and a transmissive region. Each region has independently optimized optical properties and electrode structures, allowing the screen to achieve high reflectivity in the reflective region and high transmittance in the transmissive region, thereby resolving the contradiction between adaptability and display quality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display screen are assigned different local properties: the reflective region is optimized for high reflectivity with corresponding electrode and insulation layer configurations, while the transmissive region is optimized for high transmittance with its own structural characteristics. This local differentiation enables each region to perform its function optimally

Inventive Principle:

Principle #3Local quality

2Reliability

If the cell thickness is not uniformly controlled between reflective and transmissive regions, then manufacturing complexity is reduced, but display performance (reflectivity, transmittance, contrast) deteriorates

Engineering Contradiction:

Improvedisplay performanceVSAvoidcell thickness control

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A passivation layer is introduced as an intermediary element between the electrode layers and the liquid crystal layer. This passivation layer serves as a thickness compensation mechanism that allows the cell thickness to be uniformly controlled across both reflective and transmissive regions, thereby maintaining high display performance without requiring complex thickness control processes

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the parameter of cell thickness to be uniform across different regions, which is achieved through the passivation layer design. This parameter change simplifies the manufacturing process while maintaining optimal display performance in both reflective and transmissive regions

Inventive Principle:

Principle #35Parameter changes

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 allows for optimal matching of cell thickness between reflective and transmissive regions, enhancing the display panel's reflectivity, transmittance, and contrast, thereby expanding its application range.

Implementation Method 1

the reflective region includes a driving signal outputting layer, a segment gap layer, a passivation layer and a reflective layer

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

the transmissive region includes a first electrode layer, the first electrode layer is coupled to the driving signal outputting layer

Methodology Applied

Scientific EffectLiquid crystal optical modulation: Liquid Crystals

Data Source

PatentUS12210246B2Array substrate, opposite substrate, and display panel

Publication Date: 2025.01.28 BEIJING BOE OPTOELECTRONCIS TECH CO LTD

AI summary

An array substrate, an opposite substrate and a display panel are provided. The array substrate comprises: a display region and a periphery region surrounding the display region, wherein the display region comprises a plurality of pixel regions, and each of the pixel regions comprises a reflective region and a transmissive region; the reflective region comprises a driving signal outputting layer, a segment gap layer, a passivation layer and a reflective layer, the reflective layer is coupled to the driving signal outputting layer to enable both the reflective layer and the driving signal outputting layer to function as a reflective region driving electrode; the transmissive region comprises a first electrode layer, the first electrode layer is coupled to the driving signal outputting layer, the passivation layer extends to the transmissive region, and the passivation layer is arranged between the first electrode layer and a first base of the display substrate.