Display Device Camera Hole Spacer Arrangement

Solution Overview

Problem

Display devices with camera holes experience unstable cell thickness and reduced transmittance due to inadequate spacer arrangement, leading to display unevenness and quality degradation.

Innovation Solution

A display device configuration with a color filter substrate, array substrate, liquid crystal layer, protection layer, and spacers arranged to maintain uniform thickness and transmittance, featuring an organic flattening film and a color filter that transmits white light in the hole region, with spacers and protection layer strategically positioned to enhance pressurization and light transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a hole is provided in the display region and the black matrix is removed to form a see-through hole, then transmittance of the hole region is improved, but cell thickness becomes unstable and display unevenness is caused

Engineering Contradiction:

ImprovetransmittanceVSAvoidcell thickness

Core Design Contradiction:

Illumination intensityVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by providing spacers specifically in the hole region rather than uniformly across the entire display. The spacers are arranged at different densities in different regions: a first density in the hole region and a second density in the display region. This localized approach maintains cell thickness stability where needed (hole region) while preserving transmittance improvement (by not placing spacers in the black matrix area).

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the spacer arrangement into two distinct regions: the hole region with first spacers at a first density, and the display region with second spacers at a second density. This segmentation allows independent optimization of each region - the hole region gets sufficient spacers for thickness stability, while the display region maintains its original spacer density for display quality.

Inventive Principle:

Principle #1Segmentation

2Stability of the object's composition

If spacers are arranged at the entire region corresponding to the hole between the color filter substrate and the array substrate, then cell thickness is secured, but transmittance is reduced

Engineering Contradiction:

Improvecell thicknessVSAvoidtransmittance

Core Design Contradiction:

Stability of the object's compositionVSIllumination intensity

Solution Approach 1:

The patent applies local quality by providing spacers specifically in the hole region rather than uniformly across the entire display. The spacers are arranged at different densities in different regions: a first density in the hole region and a second density in the display region. This localized approach maintains cell thickness stability where needed (hole region) while preserving transmittance improvement (by not placing spacers in the black matrix area).

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses partial action by providing spacers only in the necessary hole region rather than across the entire display area. The first spacers are arranged at a first density in the hole region, which is sufficient to maintain cell thickness stability, while avoiding excessive spacer placement that would block light and reduce transmittance in the black matrix area.

Inventive Principle:

Principle #16Partial or excessive action

3Illumination intensity

If no spacer is arranged in the hole region, then transmittance is maintained, but cell thickness is unstable and display unevenness occurs

Engineering Contradiction:

ImprovetransmittanceVSAvoidcell thickness uniformity

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by providing spacers specifically in the hole region rather than uniformly across the entire display. The spacers are arranged at different densities in different regions: a first density in the hole region and a second density in the display region. This localized approach maintains cell thickness stability where needed (hole region) while preserving transmittance improvement (by not placing spacers in the black matrix area).

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10928684B2Display device

Publication Date: 2021.02.23 SHARP KK

AI summary

A display device includes a color filter substrate, an array substrate, a liquid crystal layer, a protection layer, and a plurality of main spacers. The color filter substrate includes a display region, a hole frame region, and a hole region. Further, in a thickness direction of the hole region of the color filter, an organic flattening film is present on a surface of the array substrate on the color filter substrate side at parts corresponding to positions of the main spacers.