Display Substrate Light Blocking Grooves Anti-Peep

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Solution Overview

Problem

Existing display technologies face challenges in achieving effective anti-peep protection without compromising the integration of the anti-peep layer with the display screen, as current methods involve complex processes and require additional films that can obstruct the view from large viewing angles.

Innovation Solution

A display substrate with a base substrate, a light filtering layer containing light blocking grooves and strips, and an optional sub-wavelength grating layer, which selectively transmits light within specific color bands, is designed to block light from outside the visible range, thereby providing anti-peep protection without the need for external films.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If an anti-peep film is applied on the screen to filter out light of large viewing angles, then anti-peep protection is improved, but the fabrication process becomes complicated and integration with the display screen deteriorates

Engineering Contradiction:

Improveanti-peep protectionVSAvoidfabrication process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the anti-peep function with the color filter layer by forming light blocking grooves and filling them with light blocking materials directly in the color filter layer. This integration eliminates the need for separate anti-peep films and simplifies the fabrication process while maintaining effective anti-peep protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts the anti-peep function from the separate anti-peep film and integrates it into the color filter layer. By forming light blocking grooves and filling them with light blocking materials, the anti-peep capability is built into the existing display structure, reducing overall device complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

2Object-affected harmful factors

If an anti-peep film is applied on the screen to filter out light of large viewing angles, then anti-peep protection is improved, but integration with the display screen deteriorates

Engineering Contradiction:

Improveanti-peep protectionVSAvoidintegration with display screen

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent combines the anti-peep function with the color filter layer, allowing both functions to be achieved within a single integrated structure. The light blocking grooves are formed in the color filter layer, and light blocking materials are filled into these grooves, creating a unified component that provides both color filtering and anti-peep protection.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If light blocking grooves are formed in the color filter layer with depth equal to the thickness of the color filter layer, then anti-peep effect is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improveanti-peep effectVSAvoidgroove depth precision

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The patent specifies that the depth of the light blocking grooves is equal to the thickness of the color filter layer, which is a predetermined parameter based on the color filter layer's thickness. This parameter relationship simplifies the manufacturing process by eliminating the need for separate depth measurements and adjustments, thereby reducing manufacturing precision requirements while maintaining effective anti-peep protection.

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

The solution effectively limits the viewing angle to prevent unauthorized viewing while maintaining the display's functionality and integration, simplifying the fabrication process by eliminating the need for additional anti-peep films and enhancing the display's structural simplicity.

Implementation Method 1

The plurality of light blocking strips may be configured to block light from viewing angles outside a visible range of the display substrate

Methodology Applied

Scientific EffectLight blocking: Absorption (EM radiation)

Implementation Method 2

each of the patterns of the grating units may be configured to selectively transmit light of a color band, and different patterns of the grating units may allow light of different color bands to transmit

Methodology Applied

Scientific EffectDiffraction: Diffraction

Data Source

PatentUS11237438B2Display substrate, fabricating method thereof, and display apparatus

Publication Date: 2022.02.01 FUZHOU BOE OPTOELECTRONICS TECH CO LTD

AI summary

The present disclosure relates to a display substrate. The display substrate may include a base substrate, a light filtering layer on the base substrate, a plurality of light blocking grooves in the light filtering layer, and a plurality of light blocking strips in the plurality of light blocking grooves respectively. The plurality of light blocking strips may be configured to block light from viewing angles outside a visible range of the display substrate.